be973ed21f
The supported counts are 1, 2, 4. (3=4)
The following snippet loads float, vec2, vec3, and vec4:
Before:
buffer_load_format_x v9, v4, s[0:3], 0 idxen ; E0002000 80000904
buffer_load_format_xyzw v[0:3], v5, s[8:11], 0 idxen ; E00C2000 80020005
s_waitcnt vmcnt(0) ; BF8C0F70
buffer_load_format_xyzw v[2:5], v6, s[12:15], 0 idxen ; E00C2000 80030206
s_waitcnt vmcnt(0) ; BF8C0F70
buffer_load_format_xyzw v[5:8], v7, s[4:7], 0 idxen ; E00C2000 80010507
After:
buffer_load_format_x v10, v4, s[0:3], 0 idxen ; E0002000 80000A04
buffer_load_format_xy v[8:9], v5, s[8:11], 0 idxen ; E0042000 80020805
buffer_load_format_xyzw v[0:3], v6, s[12:15], 0 idxen ; E00C2000 80030006
s_waitcnt vmcnt(0) ; BF8C0F70
buffer_load_format_xyzw v[3:6], v7, s[4:7], 0 idxen ; E00C2000 80010307
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
1920 lines
54 KiB
C
1920 lines
54 KiB
C
/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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*/
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/* based on pieces from si_pipe.c and radeon_llvm_emit.c */
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#include "ac_llvm_build.h"
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#include <llvm-c/Core.h>
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#include "c11/threads.h"
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#include <assert.h>
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#include <stdio.h>
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#include "ac_llvm_util.h"
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#include "ac_exp_param.h"
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#include "util/bitscan.h"
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#include "util/macros.h"
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#include "util/u_atomic.h"
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#include "sid.h"
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#include "shader_enums.h"
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/* Initialize module-independent parts of the context.
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*
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* The caller is responsible for initializing ctx::module and ctx::builder.
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*/
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void
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ac_llvm_context_init(struct ac_llvm_context *ctx, LLVMContextRef context,
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enum chip_class chip_class, enum radeon_family family)
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{
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LLVMValueRef args[1];
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ctx->chip_class = chip_class;
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ctx->family = family;
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ctx->context = context;
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ctx->module = NULL;
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ctx->builder = NULL;
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ctx->voidt = LLVMVoidTypeInContext(ctx->context);
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ctx->i1 = LLVMInt1TypeInContext(ctx->context);
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ctx->i8 = LLVMInt8TypeInContext(ctx->context);
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ctx->i16 = LLVMIntTypeInContext(ctx->context, 16);
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ctx->i32 = LLVMIntTypeInContext(ctx->context, 32);
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ctx->i64 = LLVMIntTypeInContext(ctx->context, 64);
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ctx->f16 = LLVMHalfTypeInContext(ctx->context);
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ctx->f32 = LLVMFloatTypeInContext(ctx->context);
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ctx->f64 = LLVMDoubleTypeInContext(ctx->context);
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ctx->v2i32 = LLVMVectorType(ctx->i32, 2);
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ctx->v3i32 = LLVMVectorType(ctx->i32, 3);
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ctx->v4i32 = LLVMVectorType(ctx->i32, 4);
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ctx->v2f32 = LLVMVectorType(ctx->f32, 2);
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ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
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ctx->v8i32 = LLVMVectorType(ctx->i32, 8);
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ctx->i32_0 = LLVMConstInt(ctx->i32, 0, false);
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ctx->i32_1 = LLVMConstInt(ctx->i32, 1, false);
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ctx->i64_0 = LLVMConstInt(ctx->i64, 0, false);
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ctx->i64_1 = LLVMConstInt(ctx->i64, 1, false);
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ctx->f32_0 = LLVMConstReal(ctx->f32, 0.0);
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ctx->f32_1 = LLVMConstReal(ctx->f32, 1.0);
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ctx->f64_0 = LLVMConstReal(ctx->f64, 0.0);
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ctx->f64_1 = LLVMConstReal(ctx->f64, 1.0);
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ctx->i1false = LLVMConstInt(ctx->i1, 0, false);
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ctx->i1true = LLVMConstInt(ctx->i1, 1, false);
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ctx->range_md_kind = LLVMGetMDKindIDInContext(ctx->context,
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"range", 5);
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ctx->invariant_load_md_kind = LLVMGetMDKindIDInContext(ctx->context,
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"invariant.load", 14);
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ctx->fpmath_md_kind = LLVMGetMDKindIDInContext(ctx->context, "fpmath", 6);
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args[0] = LLVMConstReal(ctx->f32, 2.5);
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ctx->fpmath_md_2p5_ulp = LLVMMDNodeInContext(ctx->context, args, 1);
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ctx->uniform_md_kind = LLVMGetMDKindIDInContext(ctx->context,
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"amdgpu.uniform", 14);
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ctx->empty_md = LLVMMDNodeInContext(ctx->context, NULL, 0);
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}
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int
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ac_get_llvm_num_components(LLVMValueRef value)
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{
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LLVMTypeRef type = LLVMTypeOf(value);
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unsigned num_components = LLVMGetTypeKind(type) == LLVMVectorTypeKind
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? LLVMGetVectorSize(type)
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: 1;
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return num_components;
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}
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LLVMValueRef
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ac_llvm_extract_elem(struct ac_llvm_context *ac,
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LLVMValueRef value,
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int index)
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{
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if (LLVMGetTypeKind(LLVMTypeOf(value)) != LLVMVectorTypeKind) {
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assert(index == 0);
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return value;
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}
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return LLVMBuildExtractElement(ac->builder, value,
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LLVMConstInt(ac->i32, index, false), "");
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}
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unsigned
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ac_get_type_size(LLVMTypeRef type)
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{
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LLVMTypeKind kind = LLVMGetTypeKind(type);
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switch (kind) {
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case LLVMIntegerTypeKind:
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return LLVMGetIntTypeWidth(type) / 8;
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case LLVMFloatTypeKind:
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return 4;
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case LLVMDoubleTypeKind:
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case LLVMPointerTypeKind:
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return 8;
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case LLVMVectorTypeKind:
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return LLVMGetVectorSize(type) *
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ac_get_type_size(LLVMGetElementType(type));
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case LLVMArrayTypeKind:
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return LLVMGetArrayLength(type) *
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ac_get_type_size(LLVMGetElementType(type));
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default:
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assert(0);
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return 0;
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}
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}
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static LLVMTypeRef to_integer_type_scalar(struct ac_llvm_context *ctx, LLVMTypeRef t)
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{
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if (t == ctx->f16 || t == ctx->i16)
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return ctx->i16;
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else if (t == ctx->f32 || t == ctx->i32)
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return ctx->i32;
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else if (t == ctx->f64 || t == ctx->i64)
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return ctx->i64;
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else
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unreachable("Unhandled integer size");
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}
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LLVMTypeRef
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ac_to_integer_type(struct ac_llvm_context *ctx, LLVMTypeRef t)
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{
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if (LLVMGetTypeKind(t) == LLVMVectorTypeKind) {
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LLVMTypeRef elem_type = LLVMGetElementType(t);
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return LLVMVectorType(to_integer_type_scalar(ctx, elem_type),
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LLVMGetVectorSize(t));
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}
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return to_integer_type_scalar(ctx, t);
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}
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LLVMValueRef
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ac_to_integer(struct ac_llvm_context *ctx, LLVMValueRef v)
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{
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LLVMTypeRef type = LLVMTypeOf(v);
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return LLVMBuildBitCast(ctx->builder, v, ac_to_integer_type(ctx, type), "");
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}
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static LLVMTypeRef to_float_type_scalar(struct ac_llvm_context *ctx, LLVMTypeRef t)
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{
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if (t == ctx->i16 || t == ctx->f16)
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return ctx->f16;
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else if (t == ctx->i32 || t == ctx->f32)
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return ctx->f32;
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else if (t == ctx->i64 || t == ctx->f64)
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return ctx->f64;
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else
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unreachable("Unhandled float size");
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}
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LLVMTypeRef
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ac_to_float_type(struct ac_llvm_context *ctx, LLVMTypeRef t)
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{
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if (LLVMGetTypeKind(t) == LLVMVectorTypeKind) {
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LLVMTypeRef elem_type = LLVMGetElementType(t);
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return LLVMVectorType(to_float_type_scalar(ctx, elem_type),
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LLVMGetVectorSize(t));
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}
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return to_float_type_scalar(ctx, t);
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}
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LLVMValueRef
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ac_to_float(struct ac_llvm_context *ctx, LLVMValueRef v)
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{
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LLVMTypeRef type = LLVMTypeOf(v);
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return LLVMBuildBitCast(ctx->builder, v, ac_to_float_type(ctx, type), "");
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}
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LLVMValueRef
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ac_build_intrinsic(struct ac_llvm_context *ctx, const char *name,
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LLVMTypeRef return_type, LLVMValueRef *params,
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unsigned param_count, unsigned attrib_mask)
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{
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LLVMValueRef function, call;
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bool set_callsite_attrs = HAVE_LLVM >= 0x0400 &&
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!(attrib_mask & AC_FUNC_ATTR_LEGACY);
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function = LLVMGetNamedFunction(ctx->module, name);
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if (!function) {
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LLVMTypeRef param_types[32], function_type;
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unsigned i;
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assert(param_count <= 32);
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for (i = 0; i < param_count; ++i) {
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assert(params[i]);
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param_types[i] = LLVMTypeOf(params[i]);
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}
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function_type =
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LLVMFunctionType(return_type, param_types, param_count, 0);
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function = LLVMAddFunction(ctx->module, name, function_type);
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LLVMSetFunctionCallConv(function, LLVMCCallConv);
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LLVMSetLinkage(function, LLVMExternalLinkage);
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if (!set_callsite_attrs)
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ac_add_func_attributes(ctx->context, function, attrib_mask);
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}
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call = LLVMBuildCall(ctx->builder, function, params, param_count, "");
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if (set_callsite_attrs)
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ac_add_func_attributes(ctx->context, call, attrib_mask);
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return call;
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}
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/**
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* Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
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* intrinsic names).
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*/
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void ac_build_type_name_for_intr(LLVMTypeRef type, char *buf, unsigned bufsize)
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{
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LLVMTypeRef elem_type = type;
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assert(bufsize >= 8);
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if (LLVMGetTypeKind(type) == LLVMVectorTypeKind) {
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int ret = snprintf(buf, bufsize, "v%u",
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LLVMGetVectorSize(type));
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if (ret < 0) {
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char *type_name = LLVMPrintTypeToString(type);
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fprintf(stderr, "Error building type name for: %s\n",
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type_name);
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return;
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}
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elem_type = LLVMGetElementType(type);
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buf += ret;
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bufsize -= ret;
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}
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switch (LLVMGetTypeKind(elem_type)) {
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default: break;
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case LLVMIntegerTypeKind:
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snprintf(buf, bufsize, "i%d", LLVMGetIntTypeWidth(elem_type));
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break;
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case LLVMFloatTypeKind:
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snprintf(buf, bufsize, "f32");
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break;
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case LLVMDoubleTypeKind:
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snprintf(buf, bufsize, "f64");
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break;
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}
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}
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/**
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* Helper function that builds an LLVM IR PHI node and immediately adds
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* incoming edges.
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*/
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LLVMValueRef
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ac_build_phi(struct ac_llvm_context *ctx, LLVMTypeRef type,
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unsigned count_incoming, LLVMValueRef *values,
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LLVMBasicBlockRef *blocks)
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{
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LLVMValueRef phi = LLVMBuildPhi(ctx->builder, type, "");
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LLVMAddIncoming(phi, values, blocks, count_incoming);
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return phi;
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}
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/* Prevent optimizations (at least of memory accesses) across the current
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* point in the program by emitting empty inline assembly that is marked as
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* having side effects.
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*
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* Optionally, a value can be passed through the inline assembly to prevent
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* LLVM from hoisting calls to ReadNone functions.
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*/
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void
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ac_build_optimization_barrier(struct ac_llvm_context *ctx,
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LLVMValueRef *pvgpr)
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{
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static int counter = 0;
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LLVMBuilderRef builder = ctx->builder;
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char code[16];
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snprintf(code, sizeof(code), "; %d", p_atomic_inc_return(&counter));
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if (!pvgpr) {
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LLVMTypeRef ftype = LLVMFunctionType(ctx->voidt, NULL, 0, false);
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LLVMValueRef inlineasm = LLVMConstInlineAsm(ftype, code, "", true, false);
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LLVMBuildCall(builder, inlineasm, NULL, 0, "");
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} else {
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LLVMTypeRef ftype = LLVMFunctionType(ctx->i32, &ctx->i32, 1, false);
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LLVMValueRef inlineasm = LLVMConstInlineAsm(ftype, code, "=v,0", true, false);
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LLVMValueRef vgpr = *pvgpr;
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LLVMTypeRef vgpr_type = LLVMTypeOf(vgpr);
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unsigned vgpr_size = ac_get_type_size(vgpr_type);
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LLVMValueRef vgpr0;
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assert(vgpr_size % 4 == 0);
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vgpr = LLVMBuildBitCast(builder, vgpr, LLVMVectorType(ctx->i32, vgpr_size / 4), "");
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vgpr0 = LLVMBuildExtractElement(builder, vgpr, ctx->i32_0, "");
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vgpr0 = LLVMBuildCall(builder, inlineasm, &vgpr0, 1, "");
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vgpr = LLVMBuildInsertElement(builder, vgpr, vgpr0, ctx->i32_0, "");
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vgpr = LLVMBuildBitCast(builder, vgpr, vgpr_type, "");
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*pvgpr = vgpr;
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}
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}
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LLVMValueRef
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ac_build_ballot(struct ac_llvm_context *ctx,
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LLVMValueRef value)
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{
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LLVMValueRef args[3] = {
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value,
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ctx->i32_0,
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LLVMConstInt(ctx->i32, LLVMIntNE, 0)
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};
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/* We currently have no other way to prevent LLVM from lifting the icmp
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* calls to a dominating basic block.
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*/
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ac_build_optimization_barrier(ctx, &args[0]);
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if (LLVMTypeOf(args[0]) != ctx->i32)
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args[0] = LLVMBuildBitCast(ctx->builder, args[0], ctx->i32, "");
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return ac_build_intrinsic(ctx,
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"llvm.amdgcn.icmp.i32",
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ctx->i64, args, 3,
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AC_FUNC_ATTR_NOUNWIND |
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AC_FUNC_ATTR_READNONE |
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AC_FUNC_ATTR_CONVERGENT);
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}
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LLVMValueRef
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ac_build_vote_all(struct ac_llvm_context *ctx, LLVMValueRef value)
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{
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LLVMValueRef active_set = ac_build_ballot(ctx, ctx->i32_1);
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LLVMValueRef vote_set = ac_build_ballot(ctx, value);
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return LLVMBuildICmp(ctx->builder, LLVMIntEQ, vote_set, active_set, "");
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}
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LLVMValueRef
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ac_build_vote_any(struct ac_llvm_context *ctx, LLVMValueRef value)
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{
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LLVMValueRef vote_set = ac_build_ballot(ctx, value);
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return LLVMBuildICmp(ctx->builder, LLVMIntNE, vote_set,
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LLVMConstInt(ctx->i64, 0, 0), "");
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}
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LLVMValueRef
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ac_build_vote_eq(struct ac_llvm_context *ctx, LLVMValueRef value)
|
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{
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LLVMValueRef active_set = ac_build_ballot(ctx, ctx->i32_1);
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LLVMValueRef vote_set = ac_build_ballot(ctx, value);
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LLVMValueRef all = LLVMBuildICmp(ctx->builder, LLVMIntEQ,
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vote_set, active_set, "");
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LLVMValueRef none = LLVMBuildICmp(ctx->builder, LLVMIntEQ,
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vote_set,
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LLVMConstInt(ctx->i64, 0, 0), "");
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return LLVMBuildOr(ctx->builder, all, none, "");
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}
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|
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LLVMValueRef
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ac_build_varying_gather_values(struct ac_llvm_context *ctx, LLVMValueRef *values,
|
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unsigned value_count, unsigned component)
|
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{
|
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LLVMValueRef vec = NULL;
|
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|
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if (value_count == 1) {
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return values[component];
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} else if (!value_count)
|
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unreachable("value_count is 0");
|
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|
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for (unsigned i = component; i < value_count + component; i++) {
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LLVMValueRef value = values[i];
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if (i == component)
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vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count));
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LLVMValueRef index = LLVMConstInt(ctx->i32, i - component, false);
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vec = LLVMBuildInsertElement(ctx->builder, vec, value, index, "");
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}
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return vec;
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}
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|
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LLVMValueRef
|
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ac_build_gather_values_extended(struct ac_llvm_context *ctx,
|
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LLVMValueRef *values,
|
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unsigned value_count,
|
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unsigned value_stride,
|
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bool load,
|
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bool always_vector)
|
||
{
|
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LLVMBuilderRef builder = ctx->builder;
|
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LLVMValueRef vec = NULL;
|
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unsigned i;
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|
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if (value_count == 1 && !always_vector) {
|
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if (load)
|
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return LLVMBuildLoad(builder, values[0], "");
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return values[0];
|
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} else if (!value_count)
|
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unreachable("value_count is 0");
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|
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for (i = 0; i < value_count; i++) {
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LLVMValueRef value = values[i * value_stride];
|
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if (load)
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value = LLVMBuildLoad(builder, value, "");
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|
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if (!i)
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vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count));
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LLVMValueRef index = LLVMConstInt(ctx->i32, i, false);
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vec = LLVMBuildInsertElement(builder, vec, value, index, "");
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}
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return vec;
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_gather_values(struct ac_llvm_context *ctx,
|
||
LLVMValueRef *values,
|
||
unsigned value_count)
|
||
{
|
||
return ac_build_gather_values_extended(ctx, values, value_count, 1, false, false);
|
||
}
|
||
|
||
/* Expand a scalar or vector to <4 x type> by filling the remaining channels
|
||
* with undef. Extract at most num_channels components from the input.
|
||
*/
|
||
LLVMValueRef ac_build_expand_to_vec4(struct ac_llvm_context *ctx,
|
||
LLVMValueRef value,
|
||
unsigned num_channels)
|
||
{
|
||
LLVMTypeRef elemtype;
|
||
LLVMValueRef chan[4];
|
||
|
||
if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMVectorTypeKind) {
|
||
unsigned vec_size = LLVMGetVectorSize(LLVMTypeOf(value));
|
||
num_channels = MIN2(num_channels, vec_size);
|
||
|
||
if (num_channels >= 4)
|
||
return value;
|
||
|
||
for (unsigned i = 0; i < num_channels; i++)
|
||
chan[i] = ac_llvm_extract_elem(ctx, value, i);
|
||
|
||
elemtype = LLVMGetElementType(LLVMTypeOf(value));
|
||
} else {
|
||
if (num_channels) {
|
||
assert(num_channels == 1);
|
||
chan[0] = value;
|
||
}
|
||
elemtype = LLVMTypeOf(value);
|
||
}
|
||
|
||
while (num_channels < 4)
|
||
chan[num_channels++] = LLVMGetUndef(elemtype);
|
||
|
||
return ac_build_gather_values(ctx, chan, 4);
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_fdiv(struct ac_llvm_context *ctx,
|
||
LLVMValueRef num,
|
||
LLVMValueRef den)
|
||
{
|
||
LLVMValueRef ret = LLVMBuildFDiv(ctx->builder, num, den, "");
|
||
|
||
/* Use v_rcp_f32 instead of precise division. */
|
||
if (!LLVMIsConstant(ret))
|
||
LLVMSetMetadata(ret, ctx->fpmath_md_kind, ctx->fpmath_md_2p5_ulp);
|
||
return ret;
|
||
}
|
||
|
||
/* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
|
||
* of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
|
||
* already multiplied by two. id is the cube face number.
|
||
*/
|
||
struct cube_selection_coords {
|
||
LLVMValueRef stc[2];
|
||
LLVMValueRef ma;
|
||
LLVMValueRef id;
|
||
};
|
||
|
||
static void
|
||
build_cube_intrinsic(struct ac_llvm_context *ctx,
|
||
LLVMValueRef in[3],
|
||
struct cube_selection_coords *out)
|
||
{
|
||
LLVMTypeRef f32 = ctx->f32;
|
||
|
||
out->stc[1] = ac_build_intrinsic(ctx, "llvm.amdgcn.cubetc",
|
||
f32, in, 3, AC_FUNC_ATTR_READNONE);
|
||
out->stc[0] = ac_build_intrinsic(ctx, "llvm.amdgcn.cubesc",
|
||
f32, in, 3, AC_FUNC_ATTR_READNONE);
|
||
out->ma = ac_build_intrinsic(ctx, "llvm.amdgcn.cubema",
|
||
f32, in, 3, AC_FUNC_ATTR_READNONE);
|
||
out->id = ac_build_intrinsic(ctx, "llvm.amdgcn.cubeid",
|
||
f32, in, 3, AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
/**
|
||
* Build a manual selection sequence for cube face sc/tc coordinates and
|
||
* major axis vector (multiplied by 2 for consistency) for the given
|
||
* vec3 \p coords, for the face implied by \p selcoords.
|
||
*
|
||
* For the major axis, we always adjust the sign to be in the direction of
|
||
* selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
|
||
* the selcoords major axis.
|
||
*/
|
||
static void build_cube_select(struct ac_llvm_context *ctx,
|
||
const struct cube_selection_coords *selcoords,
|
||
const LLVMValueRef *coords,
|
||
LLVMValueRef *out_st,
|
||
LLVMValueRef *out_ma)
|
||
{
|
||
LLVMBuilderRef builder = ctx->builder;
|
||
LLVMTypeRef f32 = LLVMTypeOf(coords[0]);
|
||
LLVMValueRef is_ma_positive;
|
||
LLVMValueRef sgn_ma;
|
||
LLVMValueRef is_ma_z, is_not_ma_z;
|
||
LLVMValueRef is_ma_y;
|
||
LLVMValueRef is_ma_x;
|
||
LLVMValueRef sgn;
|
||
LLVMValueRef tmp;
|
||
|
||
is_ma_positive = LLVMBuildFCmp(builder, LLVMRealUGE,
|
||
selcoords->ma, LLVMConstReal(f32, 0.0), "");
|
||
sgn_ma = LLVMBuildSelect(builder, is_ma_positive,
|
||
LLVMConstReal(f32, 1.0), LLVMConstReal(f32, -1.0), "");
|
||
|
||
is_ma_z = LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 4.0), "");
|
||
is_not_ma_z = LLVMBuildNot(builder, is_ma_z, "");
|
||
is_ma_y = LLVMBuildAnd(builder, is_not_ma_z,
|
||
LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 2.0), ""), "");
|
||
is_ma_x = LLVMBuildAnd(builder, is_not_ma_z, LLVMBuildNot(builder, is_ma_y, ""), "");
|
||
|
||
/* Select sc */
|
||
tmp = LLVMBuildSelect(builder, is_ma_x, coords[2], coords[0], "");
|
||
sgn = LLVMBuildSelect(builder, is_ma_y, LLVMConstReal(f32, 1.0),
|
||
LLVMBuildSelect(builder, is_ma_z, sgn_ma,
|
||
LLVMBuildFNeg(builder, sgn_ma, ""), ""), "");
|
||
out_st[0] = LLVMBuildFMul(builder, tmp, sgn, "");
|
||
|
||
/* Select tc */
|
||
tmp = LLVMBuildSelect(builder, is_ma_y, coords[2], coords[1], "");
|
||
sgn = LLVMBuildSelect(builder, is_ma_y, sgn_ma,
|
||
LLVMConstReal(f32, -1.0), "");
|
||
out_st[1] = LLVMBuildFMul(builder, tmp, sgn, "");
|
||
|
||
/* Select ma */
|
||
tmp = LLVMBuildSelect(builder, is_ma_z, coords[2],
|
||
LLVMBuildSelect(builder, is_ma_y, coords[1], coords[0], ""), "");
|
||
tmp = ac_build_intrinsic(ctx, "llvm.fabs.f32",
|
||
ctx->f32, &tmp, 1, AC_FUNC_ATTR_READNONE);
|
||
*out_ma = LLVMBuildFMul(builder, tmp, LLVMConstReal(f32, 2.0), "");
|
||
}
|
||
|
||
void
|
||
ac_prepare_cube_coords(struct ac_llvm_context *ctx,
|
||
bool is_deriv, bool is_array, bool is_lod,
|
||
LLVMValueRef *coords_arg,
|
||
LLVMValueRef *derivs_arg)
|
||
{
|
||
|
||
LLVMBuilderRef builder = ctx->builder;
|
||
struct cube_selection_coords selcoords;
|
||
LLVMValueRef coords[3];
|
||
LLVMValueRef invma;
|
||
|
||
if (is_array && !is_lod) {
|
||
LLVMValueRef tmp = coords_arg[3];
|
||
tmp = ac_build_intrinsic(ctx, "llvm.rint.f32", ctx->f32, &tmp, 1, 0);
|
||
|
||
/* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says:
|
||
*
|
||
* "For Array forms, the array layer used will be
|
||
*
|
||
* max(0, min(d−1, floor(layer+0.5)))
|
||
*
|
||
* where d is the depth of the texture array and layer
|
||
* comes from the component indicated in the tables below.
|
||
* Workaroudn for an issue where the layer is taken from a
|
||
* helper invocation which happens to fall on a different
|
||
* layer due to extrapolation."
|
||
*
|
||
* VI and earlier attempt to implement this in hardware by
|
||
* clamping the value of coords[2] = (8 * layer) + face.
|
||
* Unfortunately, this means that the we end up with the wrong
|
||
* face when clamping occurs.
|
||
*
|
||
* Clamp the layer earlier to work around the issue.
|
||
*/
|
||
if (ctx->chip_class <= VI) {
|
||
LLVMValueRef ge0;
|
||
ge0 = LLVMBuildFCmp(builder, LLVMRealOGE, tmp, ctx->f32_0, "");
|
||
tmp = LLVMBuildSelect(builder, ge0, tmp, ctx->f32_0, "");
|
||
}
|
||
|
||
coords_arg[3] = tmp;
|
||
}
|
||
|
||
build_cube_intrinsic(ctx, coords_arg, &selcoords);
|
||
|
||
invma = ac_build_intrinsic(ctx, "llvm.fabs.f32",
|
||
ctx->f32, &selcoords.ma, 1, AC_FUNC_ATTR_READNONE);
|
||
invma = ac_build_fdiv(ctx, LLVMConstReal(ctx->f32, 1.0), invma);
|
||
|
||
for (int i = 0; i < 2; ++i)
|
||
coords[i] = LLVMBuildFMul(builder, selcoords.stc[i], invma, "");
|
||
|
||
coords[2] = selcoords.id;
|
||
|
||
if (is_deriv && derivs_arg) {
|
||
LLVMValueRef derivs[4];
|
||
int axis;
|
||
|
||
/* Convert cube derivatives to 2D derivatives. */
|
||
for (axis = 0; axis < 2; axis++) {
|
||
LLVMValueRef deriv_st[2];
|
||
LLVMValueRef deriv_ma;
|
||
|
||
/* Transform the derivative alongside the texture
|
||
* coordinate. Mathematically, the correct formula is
|
||
* as follows. Assume we're projecting onto the +Z face
|
||
* and denote by dx/dh the derivative of the (original)
|
||
* X texture coordinate with respect to horizontal
|
||
* window coordinates. The projection onto the +Z face
|
||
* plane is:
|
||
*
|
||
* f(x,z) = x/z
|
||
*
|
||
* Then df/dh = df/dx * dx/dh + df/dz * dz/dh
|
||
* = 1/z * dx/dh - x/z * 1/z * dz/dh.
|
||
*
|
||
* This motivatives the implementation below.
|
||
*
|
||
* Whether this actually gives the expected results for
|
||
* apps that might feed in derivatives obtained via
|
||
* finite differences is anyone's guess. The OpenGL spec
|
||
* seems awfully quiet about how textureGrad for cube
|
||
* maps should be handled.
|
||
*/
|
||
build_cube_select(ctx, &selcoords, &derivs_arg[axis * 3],
|
||
deriv_st, &deriv_ma);
|
||
|
||
deriv_ma = LLVMBuildFMul(builder, deriv_ma, invma, "");
|
||
|
||
for (int i = 0; i < 2; ++i)
|
||
derivs[axis * 2 + i] =
|
||
LLVMBuildFSub(builder,
|
||
LLVMBuildFMul(builder, deriv_st[i], invma, ""),
|
||
LLVMBuildFMul(builder, deriv_ma, coords[i], ""), "");
|
||
}
|
||
|
||
memcpy(derivs_arg, derivs, sizeof(derivs));
|
||
}
|
||
|
||
/* Shift the texture coordinate. This must be applied after the
|
||
* derivative calculation.
|
||
*/
|
||
for (int i = 0; i < 2; ++i)
|
||
coords[i] = LLVMBuildFAdd(builder, coords[i], LLVMConstReal(ctx->f32, 1.5), "");
|
||
|
||
if (is_array) {
|
||
/* for cube arrays coord.z = coord.w(array_index) * 8 + face */
|
||
/* coords_arg.w component - array_index for cube arrays */
|
||
LLVMValueRef tmp = LLVMBuildFMul(ctx->builder, coords_arg[3], LLVMConstReal(ctx->f32, 8.0), "");
|
||
coords[2] = LLVMBuildFAdd(ctx->builder, tmp, coords[2], "");
|
||
}
|
||
|
||
memcpy(coords_arg, coords, sizeof(coords));
|
||
}
|
||
|
||
|
||
LLVMValueRef
|
||
ac_build_fs_interp(struct ac_llvm_context *ctx,
|
||
LLVMValueRef llvm_chan,
|
||
LLVMValueRef attr_number,
|
||
LLVMValueRef params,
|
||
LLVMValueRef i,
|
||
LLVMValueRef j)
|
||
{
|
||
LLVMValueRef args[5];
|
||
LLVMValueRef p1;
|
||
|
||
if (HAVE_LLVM < 0x0400) {
|
||
LLVMValueRef ij[2];
|
||
ij[0] = LLVMBuildBitCast(ctx->builder, i, ctx->i32, "");
|
||
ij[1] = LLVMBuildBitCast(ctx->builder, j, ctx->i32, "");
|
||
|
||
args[0] = llvm_chan;
|
||
args[1] = attr_number;
|
||
args[2] = params;
|
||
args[3] = ac_build_gather_values(ctx, ij, 2);
|
||
return ac_build_intrinsic(ctx, "llvm.SI.fs.interp",
|
||
ctx->f32, args, 4,
|
||
AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
args[0] = i;
|
||
args[1] = llvm_chan;
|
||
args[2] = attr_number;
|
||
args[3] = params;
|
||
|
||
p1 = ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p1",
|
||
ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
|
||
|
||
args[0] = p1;
|
||
args[1] = j;
|
||
args[2] = llvm_chan;
|
||
args[3] = attr_number;
|
||
args[4] = params;
|
||
|
||
return ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p2",
|
||
ctx->f32, args, 5, AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_fs_interp_mov(struct ac_llvm_context *ctx,
|
||
LLVMValueRef parameter,
|
||
LLVMValueRef llvm_chan,
|
||
LLVMValueRef attr_number,
|
||
LLVMValueRef params)
|
||
{
|
||
LLVMValueRef args[4];
|
||
if (HAVE_LLVM < 0x0400) {
|
||
args[0] = llvm_chan;
|
||
args[1] = attr_number;
|
||
args[2] = params;
|
||
|
||
return ac_build_intrinsic(ctx,
|
||
"llvm.SI.fs.constant",
|
||
ctx->f32, args, 3,
|
||
AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
args[0] = parameter;
|
||
args[1] = llvm_chan;
|
||
args[2] = attr_number;
|
||
args[3] = params;
|
||
|
||
return ac_build_intrinsic(ctx, "llvm.amdgcn.interp.mov",
|
||
ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_gep0(struct ac_llvm_context *ctx,
|
||
LLVMValueRef base_ptr,
|
||
LLVMValueRef index)
|
||
{
|
||
LLVMValueRef indices[2] = {
|
||
LLVMConstInt(ctx->i32, 0, 0),
|
||
index,
|
||
};
|
||
return LLVMBuildGEP(ctx->builder, base_ptr,
|
||
indices, 2, "");
|
||
}
|
||
|
||
void
|
||
ac_build_indexed_store(struct ac_llvm_context *ctx,
|
||
LLVMValueRef base_ptr, LLVMValueRef index,
|
||
LLVMValueRef value)
|
||
{
|
||
LLVMBuildStore(ctx->builder, value,
|
||
ac_build_gep0(ctx, base_ptr, index));
|
||
}
|
||
|
||
/**
|
||
* Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
|
||
* It's equivalent to doing a load from &base_ptr[index].
|
||
*
|
||
* \param base_ptr Where the array starts.
|
||
* \param index The element index into the array.
|
||
* \param uniform Whether the base_ptr and index can be assumed to be
|
||
* dynamically uniform (i.e. load to an SGPR)
|
||
* \param invariant Whether the load is invariant (no other opcodes affect it)
|
||
*/
|
||
static LLVMValueRef
|
||
ac_build_load_custom(struct ac_llvm_context *ctx, LLVMValueRef base_ptr,
|
||
LLVMValueRef index, bool uniform, bool invariant)
|
||
{
|
||
LLVMValueRef pointer, result;
|
||
|
||
pointer = ac_build_gep0(ctx, base_ptr, index);
|
||
if (uniform)
|
||
LLVMSetMetadata(pointer, ctx->uniform_md_kind, ctx->empty_md);
|
||
result = LLVMBuildLoad(ctx->builder, pointer, "");
|
||
if (invariant)
|
||
LLVMSetMetadata(result, ctx->invariant_load_md_kind, ctx->empty_md);
|
||
return result;
|
||
}
|
||
|
||
LLVMValueRef ac_build_load(struct ac_llvm_context *ctx, LLVMValueRef base_ptr,
|
||
LLVMValueRef index)
|
||
{
|
||
return ac_build_load_custom(ctx, base_ptr, index, false, false);
|
||
}
|
||
|
||
LLVMValueRef ac_build_load_invariant(struct ac_llvm_context *ctx,
|
||
LLVMValueRef base_ptr, LLVMValueRef index)
|
||
{
|
||
return ac_build_load_custom(ctx, base_ptr, index, false, true);
|
||
}
|
||
|
||
LLVMValueRef ac_build_load_to_sgpr(struct ac_llvm_context *ctx,
|
||
LLVMValueRef base_ptr, LLVMValueRef index)
|
||
{
|
||
return ac_build_load_custom(ctx, base_ptr, index, true, true);
|
||
}
|
||
|
||
/* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
|
||
* The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
|
||
* or v4i32 (num_channels=3,4).
|
||
*/
|
||
void
|
||
ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
|
||
LLVMValueRef rsrc,
|
||
LLVMValueRef vdata,
|
||
unsigned num_channels,
|
||
LLVMValueRef voffset,
|
||
LLVMValueRef soffset,
|
||
unsigned inst_offset,
|
||
bool glc,
|
||
bool slc,
|
||
bool writeonly_memory,
|
||
bool swizzle_enable_hint)
|
||
{
|
||
/* SWIZZLE_ENABLE requires that soffset isn't folded into voffset
|
||
* (voffset is swizzled, but soffset isn't swizzled).
|
||
* llvm.amdgcn.buffer.store doesn't have a separate soffset parameter.
|
||
*/
|
||
if (!swizzle_enable_hint) {
|
||
/* Split 3 channel stores, becase LLVM doesn't support 3-channel
|
||
* intrinsics. */
|
||
if (num_channels == 3) {
|
||
LLVMValueRef v[3], v01;
|
||
|
||
for (int i = 0; i < 3; i++) {
|
||
v[i] = LLVMBuildExtractElement(ctx->builder, vdata,
|
||
LLVMConstInt(ctx->i32, i, 0), "");
|
||
}
|
||
v01 = ac_build_gather_values(ctx, v, 2);
|
||
|
||
ac_build_buffer_store_dword(ctx, rsrc, v01, 2, voffset,
|
||
soffset, inst_offset, glc, slc,
|
||
writeonly_memory, swizzle_enable_hint);
|
||
ac_build_buffer_store_dword(ctx, rsrc, v[2], 1, voffset,
|
||
soffset, inst_offset + 8,
|
||
glc, slc,
|
||
writeonly_memory, swizzle_enable_hint);
|
||
return;
|
||
}
|
||
|
||
unsigned func = CLAMP(num_channels, 1, 3) - 1;
|
||
static const char *types[] = {"f32", "v2f32", "v4f32"};
|
||
char name[256];
|
||
LLVMValueRef offset = soffset;
|
||
|
||
if (inst_offset)
|
||
offset = LLVMBuildAdd(ctx->builder, offset,
|
||
LLVMConstInt(ctx->i32, inst_offset, 0), "");
|
||
if (voffset)
|
||
offset = LLVMBuildAdd(ctx->builder, offset, voffset, "");
|
||
|
||
LLVMValueRef args[] = {
|
||
ac_to_float(ctx, vdata),
|
||
LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""),
|
||
LLVMConstInt(ctx->i32, 0, 0),
|
||
offset,
|
||
LLVMConstInt(ctx->i1, glc, 0),
|
||
LLVMConstInt(ctx->i1, slc, 0),
|
||
};
|
||
|
||
snprintf(name, sizeof(name), "llvm.amdgcn.buffer.store.%s",
|
||
types[func]);
|
||
|
||
ac_build_intrinsic(ctx, name, ctx->voidt,
|
||
args, ARRAY_SIZE(args),
|
||
writeonly_memory ?
|
||
AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY :
|
||
AC_FUNC_ATTR_WRITEONLY);
|
||
return;
|
||
}
|
||
|
||
static unsigned dfmt[] = {
|
||
V_008F0C_BUF_DATA_FORMAT_32,
|
||
V_008F0C_BUF_DATA_FORMAT_32_32,
|
||
V_008F0C_BUF_DATA_FORMAT_32_32_32,
|
||
V_008F0C_BUF_DATA_FORMAT_32_32_32_32
|
||
};
|
||
assert(num_channels >= 1 && num_channels <= 4);
|
||
|
||
LLVMValueRef args[] = {
|
||
rsrc,
|
||
vdata,
|
||
LLVMConstInt(ctx->i32, num_channels, 0),
|
||
voffset ? voffset : LLVMGetUndef(ctx->i32),
|
||
soffset,
|
||
LLVMConstInt(ctx->i32, inst_offset, 0),
|
||
LLVMConstInt(ctx->i32, dfmt[num_channels - 1], 0),
|
||
LLVMConstInt(ctx->i32, V_008F0C_BUF_NUM_FORMAT_UINT, 0),
|
||
LLVMConstInt(ctx->i32, voffset != NULL, 0),
|
||
LLVMConstInt(ctx->i32, 0, 0), /* idxen */
|
||
LLVMConstInt(ctx->i32, glc, 0),
|
||
LLVMConstInt(ctx->i32, slc, 0),
|
||
LLVMConstInt(ctx->i32, 0, 0), /* tfe*/
|
||
};
|
||
|
||
/* The instruction offset field has 12 bits */
|
||
assert(voffset || inst_offset < (1 << 12));
|
||
|
||
/* The intrinsic is overloaded, we need to add a type suffix for overloading to work. */
|
||
unsigned func = CLAMP(num_channels, 1, 3) - 1;
|
||
const char *types[] = {"i32", "v2i32", "v4i32"};
|
||
char name[256];
|
||
snprintf(name, sizeof(name), "llvm.SI.tbuffer.store.%s", types[func]);
|
||
|
||
ac_build_intrinsic(ctx, name, ctx->voidt,
|
||
args, ARRAY_SIZE(args),
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
static LLVMValueRef
|
||
ac_build_buffer_load_common(struct ac_llvm_context *ctx,
|
||
LLVMValueRef rsrc,
|
||
LLVMValueRef vindex,
|
||
LLVMValueRef voffset,
|
||
unsigned num_channels,
|
||
bool glc,
|
||
bool slc,
|
||
bool can_speculate,
|
||
bool use_format)
|
||
{
|
||
LLVMValueRef args[] = {
|
||
LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""),
|
||
vindex ? vindex : LLVMConstInt(ctx->i32, 0, 0),
|
||
voffset,
|
||
LLVMConstInt(ctx->i1, glc, 0),
|
||
LLVMConstInt(ctx->i1, slc, 0)
|
||
};
|
||
unsigned func = CLAMP(num_channels, 1, 3) - 1;
|
||
|
||
LLVMTypeRef types[] = {ctx->f32, ctx->v2f32, ctx->v4f32};
|
||
const char *type_names[] = {"f32", "v2f32", "v4f32"};
|
||
char name[256];
|
||
|
||
if (use_format) {
|
||
snprintf(name, sizeof(name), "llvm.amdgcn.buffer.load.format.%s",
|
||
type_names[func]);
|
||
} else {
|
||
snprintf(name, sizeof(name), "llvm.amdgcn.buffer.load.%s",
|
||
type_names[func]);
|
||
}
|
||
|
||
return ac_build_intrinsic(ctx, name, types[func], args,
|
||
ARRAY_SIZE(args),
|
||
ac_get_load_intr_attribs(can_speculate));
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_buffer_load(struct ac_llvm_context *ctx,
|
||
LLVMValueRef rsrc,
|
||
int num_channels,
|
||
LLVMValueRef vindex,
|
||
LLVMValueRef voffset,
|
||
LLVMValueRef soffset,
|
||
unsigned inst_offset,
|
||
unsigned glc,
|
||
unsigned slc,
|
||
bool can_speculate,
|
||
bool allow_smem)
|
||
{
|
||
LLVMValueRef offset = LLVMConstInt(ctx->i32, inst_offset, 0);
|
||
if (voffset)
|
||
offset = LLVMBuildAdd(ctx->builder, offset, voffset, "");
|
||
if (soffset)
|
||
offset = LLVMBuildAdd(ctx->builder, offset, soffset, "");
|
||
|
||
/* TODO: VI and later generations can use SMEM with GLC=1.*/
|
||
if (allow_smem && !glc && !slc) {
|
||
assert(vindex == NULL);
|
||
|
||
LLVMValueRef result[8];
|
||
|
||
for (int i = 0; i < num_channels; i++) {
|
||
if (i) {
|
||
offset = LLVMBuildAdd(ctx->builder, offset,
|
||
LLVMConstInt(ctx->i32, 4, 0), "");
|
||
}
|
||
LLVMValueRef args[2] = {rsrc, offset};
|
||
result[i] = ac_build_intrinsic(ctx, "llvm.SI.load.const.v4i32",
|
||
ctx->f32, args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
if (num_channels == 1)
|
||
return result[0];
|
||
|
||
if (num_channels == 3)
|
||
result[num_channels++] = LLVMGetUndef(ctx->f32);
|
||
return ac_build_gather_values(ctx, result, num_channels);
|
||
}
|
||
|
||
return ac_build_buffer_load_common(ctx, rsrc, vindex, offset,
|
||
num_channels, glc, slc,
|
||
can_speculate, false);
|
||
}
|
||
|
||
LLVMValueRef ac_build_buffer_load_format(struct ac_llvm_context *ctx,
|
||
LLVMValueRef rsrc,
|
||
LLVMValueRef vindex,
|
||
LLVMValueRef voffset,
|
||
unsigned num_channels,
|
||
bool can_speculate)
|
||
{
|
||
return ac_build_buffer_load_common(ctx, rsrc, vindex, voffset,
|
||
num_channels, false, false,
|
||
can_speculate, true);
|
||
}
|
||
|
||
/**
|
||
* Set range metadata on an instruction. This can only be used on load and
|
||
* call instructions. If you know an instruction can only produce the values
|
||
* 0, 1, 2, you would do set_range_metadata(value, 0, 3);
|
||
* \p lo is the minimum value inclusive.
|
||
* \p hi is the maximum value exclusive.
|
||
*/
|
||
static void set_range_metadata(struct ac_llvm_context *ctx,
|
||
LLVMValueRef value, unsigned lo, unsigned hi)
|
||
{
|
||
LLVMValueRef range_md, md_args[2];
|
||
LLVMTypeRef type = LLVMTypeOf(value);
|
||
LLVMContextRef context = LLVMGetTypeContext(type);
|
||
|
||
md_args[0] = LLVMConstInt(type, lo, false);
|
||
md_args[1] = LLVMConstInt(type, hi, false);
|
||
range_md = LLVMMDNodeInContext(context, md_args, 2);
|
||
LLVMSetMetadata(value, ctx->range_md_kind, range_md);
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_get_thread_id(struct ac_llvm_context *ctx)
|
||
{
|
||
LLVMValueRef tid;
|
||
|
||
LLVMValueRef tid_args[2];
|
||
tid_args[0] = LLVMConstInt(ctx->i32, 0xffffffff, false);
|
||
tid_args[1] = LLVMConstInt(ctx->i32, 0, false);
|
||
tid_args[1] = ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.mbcnt.lo", ctx->i32,
|
||
tid_args, 2, AC_FUNC_ATTR_READNONE);
|
||
|
||
tid = ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi",
|
||
ctx->i32, tid_args,
|
||
2, AC_FUNC_ATTR_READNONE);
|
||
set_range_metadata(ctx, tid, 0, 64);
|
||
return tid;
|
||
}
|
||
|
||
/*
|
||
* SI implements derivatives using the local data store (LDS)
|
||
* All writes to the LDS happen in all executing threads at
|
||
* the same time. TID is the Thread ID for the current
|
||
* thread and is a value between 0 and 63, representing
|
||
* the thread's position in the wavefront.
|
||
*
|
||
* For the pixel shader threads are grouped into quads of four pixels.
|
||
* The TIDs of the pixels of a quad are:
|
||
*
|
||
* +------+------+
|
||
* |4n + 0|4n + 1|
|
||
* +------+------+
|
||
* |4n + 2|4n + 3|
|
||
* +------+------+
|
||
*
|
||
* So, masking the TID with 0xfffffffc yields the TID of the top left pixel
|
||
* of the quad, masking with 0xfffffffd yields the TID of the top pixel of
|
||
* the current pixel's column, and masking with 0xfffffffe yields the TID
|
||
* of the left pixel of the current pixel's row.
|
||
*
|
||
* Adding 1 yields the TID of the pixel to the right of the left pixel, and
|
||
* adding 2 yields the TID of the pixel below the top pixel.
|
||
*/
|
||
LLVMValueRef
|
||
ac_build_ddxy(struct ac_llvm_context *ctx,
|
||
uint32_t mask,
|
||
int idx,
|
||
LLVMValueRef val)
|
||
{
|
||
LLVMValueRef tl, trbl, args[2];
|
||
LLVMValueRef result;
|
||
|
||
if (ctx->chip_class >= VI) {
|
||
LLVMValueRef thread_id, tl_tid, trbl_tid;
|
||
thread_id = ac_get_thread_id(ctx);
|
||
|
||
tl_tid = LLVMBuildAnd(ctx->builder, thread_id,
|
||
LLVMConstInt(ctx->i32, mask, false), "");
|
||
|
||
trbl_tid = LLVMBuildAdd(ctx->builder, tl_tid,
|
||
LLVMConstInt(ctx->i32, idx, false), "");
|
||
|
||
args[0] = LLVMBuildMul(ctx->builder, tl_tid,
|
||
LLVMConstInt(ctx->i32, 4, false), "");
|
||
args[1] = val;
|
||
tl = ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.ds.bpermute", ctx->i32,
|
||
args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_CONVERGENT);
|
||
|
||
args[0] = LLVMBuildMul(ctx->builder, trbl_tid,
|
||
LLVMConstInt(ctx->i32, 4, false), "");
|
||
trbl = ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.ds.bpermute", ctx->i32,
|
||
args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_CONVERGENT);
|
||
} else {
|
||
uint32_t masks[2] = {};
|
||
|
||
switch (mask) {
|
||
case AC_TID_MASK_TOP_LEFT:
|
||
masks[0] = 0x8000;
|
||
if (idx == 1)
|
||
masks[1] = 0x8055;
|
||
else
|
||
masks[1] = 0x80aa;
|
||
|
||
break;
|
||
case AC_TID_MASK_TOP:
|
||
masks[0] = 0x8044;
|
||
masks[1] = 0x80ee;
|
||
break;
|
||
case AC_TID_MASK_LEFT:
|
||
masks[0] = 0x80a0;
|
||
masks[1] = 0x80f5;
|
||
break;
|
||
default:
|
||
assert(0);
|
||
}
|
||
|
||
args[0] = val;
|
||
args[1] = LLVMConstInt(ctx->i32, masks[0], false);
|
||
|
||
tl = ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.ds.swizzle", ctx->i32,
|
||
args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_CONVERGENT);
|
||
|
||
args[1] = LLVMConstInt(ctx->i32, masks[1], false);
|
||
trbl = ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.ds.swizzle", ctx->i32,
|
||
args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_CONVERGENT);
|
||
}
|
||
|
||
tl = LLVMBuildBitCast(ctx->builder, tl, ctx->f32, "");
|
||
trbl = LLVMBuildBitCast(ctx->builder, trbl, ctx->f32, "");
|
||
result = LLVMBuildFSub(ctx->builder, trbl, tl, "");
|
||
return result;
|
||
}
|
||
|
||
void
|
||
ac_build_sendmsg(struct ac_llvm_context *ctx,
|
||
uint32_t msg,
|
||
LLVMValueRef wave_id)
|
||
{
|
||
LLVMValueRef args[2];
|
||
const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.SI.sendmsg" : "llvm.amdgcn.s.sendmsg";
|
||
args[0] = LLVMConstInt(ctx->i32, msg, false);
|
||
args[1] = wave_id;
|
||
ac_build_intrinsic(ctx, intr_name, ctx->voidt, args, 2, 0);
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_imsb(struct ac_llvm_context *ctx,
|
||
LLVMValueRef arg,
|
||
LLVMTypeRef dst_type)
|
||
{
|
||
const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" :
|
||
"llvm.amdgcn.sffbh.i32";
|
||
LLVMValueRef msb = ac_build_intrinsic(ctx, intr_name,
|
||
dst_type, &arg, 1,
|
||
AC_FUNC_ATTR_READNONE);
|
||
|
||
/* The HW returns the last bit index from MSB, but NIR/TGSI wants
|
||
* the index from LSB. Invert it by doing "31 - msb". */
|
||
msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false),
|
||
msb, "");
|
||
|
||
LLVMValueRef all_ones = LLVMConstInt(ctx->i32, -1, true);
|
||
LLVMValueRef cond = LLVMBuildOr(ctx->builder,
|
||
LLVMBuildICmp(ctx->builder, LLVMIntEQ,
|
||
arg, LLVMConstInt(ctx->i32, 0, 0), ""),
|
||
LLVMBuildICmp(ctx->builder, LLVMIntEQ,
|
||
arg, all_ones, ""), "");
|
||
|
||
return LLVMBuildSelect(ctx->builder, cond, all_ones, msb, "");
|
||
}
|
||
|
||
LLVMValueRef
|
||
ac_build_umsb(struct ac_llvm_context *ctx,
|
||
LLVMValueRef arg,
|
||
LLVMTypeRef dst_type)
|
||
{
|
||
LLVMValueRef args[2] = {
|
||
arg,
|
||
ctx->i1true,
|
||
};
|
||
LLVMValueRef msb = ac_build_intrinsic(ctx, "llvm.ctlz.i32",
|
||
dst_type, args, ARRAY_SIZE(args),
|
||
AC_FUNC_ATTR_READNONE);
|
||
|
||
/* The HW returns the last bit index from MSB, but TGSI/NIR wants
|
||
* the index from LSB. Invert it by doing "31 - msb". */
|
||
msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false),
|
||
msb, "");
|
||
|
||
/* check for zero */
|
||
return LLVMBuildSelect(ctx->builder,
|
||
LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg,
|
||
LLVMConstInt(ctx->i32, 0, 0), ""),
|
||
LLVMConstInt(ctx->i32, -1, true), msb, "");
|
||
}
|
||
|
||
LLVMValueRef ac_build_fmin(struct ac_llvm_context *ctx, LLVMValueRef a,
|
||
LLVMValueRef b)
|
||
{
|
||
LLVMValueRef args[2] = {a, b};
|
||
return ac_build_intrinsic(ctx, "llvm.minnum.f32", ctx->f32, args, 2,
|
||
AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
LLVMValueRef ac_build_fmax(struct ac_llvm_context *ctx, LLVMValueRef a,
|
||
LLVMValueRef b)
|
||
{
|
||
LLVMValueRef args[2] = {a, b};
|
||
return ac_build_intrinsic(ctx, "llvm.maxnum.f32", ctx->f32, args, 2,
|
||
AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
LLVMValueRef ac_build_umin(struct ac_llvm_context *ctx, LLVMValueRef a,
|
||
LLVMValueRef b)
|
||
{
|
||
LLVMValueRef cmp = LLVMBuildICmp(ctx->builder, LLVMIntULE, a, b, "");
|
||
return LLVMBuildSelect(ctx->builder, cmp, a, b, "");
|
||
}
|
||
|
||
LLVMValueRef ac_build_clamp(struct ac_llvm_context *ctx, LLVMValueRef value)
|
||
{
|
||
if (HAVE_LLVM >= 0x0500) {
|
||
return ac_build_fmin(ctx, ac_build_fmax(ctx, value, ctx->f32_0),
|
||
ctx->f32_1);
|
||
}
|
||
|
||
LLVMValueRef args[3] = {
|
||
value,
|
||
LLVMConstReal(ctx->f32, 0),
|
||
LLVMConstReal(ctx->f32, 1),
|
||
};
|
||
|
||
return ac_build_intrinsic(ctx, "llvm.AMDGPU.clamp.", ctx->f32, args, 3,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
void ac_build_export(struct ac_llvm_context *ctx, struct ac_export_args *a)
|
||
{
|
||
LLVMValueRef args[9];
|
||
|
||
if (HAVE_LLVM >= 0x0500) {
|
||
args[0] = LLVMConstInt(ctx->i32, a->target, 0);
|
||
args[1] = LLVMConstInt(ctx->i32, a->enabled_channels, 0);
|
||
|
||
if (a->compr) {
|
||
LLVMTypeRef i16 = LLVMInt16TypeInContext(ctx->context);
|
||
LLVMTypeRef v2i16 = LLVMVectorType(i16, 2);
|
||
|
||
args[2] = LLVMBuildBitCast(ctx->builder, a->out[0],
|
||
v2i16, "");
|
||
args[3] = LLVMBuildBitCast(ctx->builder, a->out[1],
|
||
v2i16, "");
|
||
args[4] = LLVMConstInt(ctx->i1, a->done, 0);
|
||
args[5] = LLVMConstInt(ctx->i1, a->valid_mask, 0);
|
||
|
||
ac_build_intrinsic(ctx, "llvm.amdgcn.exp.compr.v2i16",
|
||
ctx->voidt, args, 6, 0);
|
||
} else {
|
||
args[2] = a->out[0];
|
||
args[3] = a->out[1];
|
||
args[4] = a->out[2];
|
||
args[5] = a->out[3];
|
||
args[6] = LLVMConstInt(ctx->i1, a->done, 0);
|
||
args[7] = LLVMConstInt(ctx->i1, a->valid_mask, 0);
|
||
|
||
ac_build_intrinsic(ctx, "llvm.amdgcn.exp.f32",
|
||
ctx->voidt, args, 8, 0);
|
||
}
|
||
return;
|
||
}
|
||
|
||
args[0] = LLVMConstInt(ctx->i32, a->enabled_channels, 0);
|
||
args[1] = LLVMConstInt(ctx->i32, a->valid_mask, 0);
|
||
args[2] = LLVMConstInt(ctx->i32, a->done, 0);
|
||
args[3] = LLVMConstInt(ctx->i32, a->target, 0);
|
||
args[4] = LLVMConstInt(ctx->i32, a->compr, 0);
|
||
memcpy(args + 5, a->out, sizeof(a->out[0]) * 4);
|
||
|
||
ac_build_intrinsic(ctx, "llvm.SI.export", ctx->voidt, args, 9,
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
LLVMValueRef ac_build_image_opcode(struct ac_llvm_context *ctx,
|
||
struct ac_image_args *a)
|
||
{
|
||
LLVMTypeRef dst_type;
|
||
LLVMValueRef args[11];
|
||
unsigned num_args = 0;
|
||
const char *name = NULL;
|
||
char intr_name[128], type[64];
|
||
|
||
if (HAVE_LLVM >= 0x0400) {
|
||
bool sample = a->opcode == ac_image_sample ||
|
||
a->opcode == ac_image_gather4 ||
|
||
a->opcode == ac_image_get_lod;
|
||
|
||
if (sample)
|
||
args[num_args++] = ac_to_float(ctx, a->addr);
|
||
else
|
||
args[num_args++] = a->addr;
|
||
|
||
args[num_args++] = a->resource;
|
||
if (sample)
|
||
args[num_args++] = a->sampler;
|
||
args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0);
|
||
if (sample)
|
||
args[num_args++] = LLVMConstInt(ctx->i1, a->unorm, 0);
|
||
args[num_args++] = ctx->i1false; /* glc */
|
||
args[num_args++] = ctx->i1false; /* slc */
|
||
args[num_args++] = ctx->i1false; /* lwe */
|
||
args[num_args++] = LLVMConstInt(ctx->i1, a->da, 0);
|
||
|
||
switch (a->opcode) {
|
||
case ac_image_sample:
|
||
name = "llvm.amdgcn.image.sample";
|
||
break;
|
||
case ac_image_gather4:
|
||
name = "llvm.amdgcn.image.gather4";
|
||
break;
|
||
case ac_image_load:
|
||
name = "llvm.amdgcn.image.load";
|
||
break;
|
||
case ac_image_load_mip:
|
||
name = "llvm.amdgcn.image.load.mip";
|
||
break;
|
||
case ac_image_get_lod:
|
||
name = "llvm.amdgcn.image.getlod";
|
||
break;
|
||
case ac_image_get_resinfo:
|
||
name = "llvm.amdgcn.image.getresinfo";
|
||
break;
|
||
default:
|
||
unreachable("invalid image opcode");
|
||
}
|
||
|
||
ac_build_type_name_for_intr(LLVMTypeOf(args[0]), type,
|
||
sizeof(type));
|
||
|
||
snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.v4f32.%s.v8i32",
|
||
name,
|
||
a->compare ? ".c" : "",
|
||
a->bias ? ".b" :
|
||
a->lod ? ".l" :
|
||
a->deriv ? ".d" :
|
||
a->level_zero ? ".lz" : "",
|
||
a->offset ? ".o" : "",
|
||
type);
|
||
|
||
LLVMValueRef result =
|
||
ac_build_intrinsic(ctx, intr_name,
|
||
ctx->v4f32, args, num_args,
|
||
AC_FUNC_ATTR_READNONE);
|
||
if (!sample) {
|
||
result = LLVMBuildBitCast(ctx->builder, result,
|
||
ctx->v4i32, "");
|
||
}
|
||
return result;
|
||
}
|
||
|
||
args[num_args++] = a->addr;
|
||
args[num_args++] = a->resource;
|
||
|
||
if (a->opcode == ac_image_load ||
|
||
a->opcode == ac_image_load_mip ||
|
||
a->opcode == ac_image_get_resinfo) {
|
||
dst_type = ctx->v4i32;
|
||
} else {
|
||
dst_type = ctx->v4f32;
|
||
args[num_args++] = a->sampler;
|
||
}
|
||
|
||
args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0);
|
||
args[num_args++] = LLVMConstInt(ctx->i32, a->unorm, 0);
|
||
args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* r128 */
|
||
args[num_args++] = LLVMConstInt(ctx->i32, a->da, 0);
|
||
args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* glc */
|
||
args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* slc */
|
||
args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* tfe */
|
||
args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* lwe */
|
||
|
||
switch (a->opcode) {
|
||
case ac_image_sample:
|
||
name = "llvm.SI.image.sample";
|
||
break;
|
||
case ac_image_gather4:
|
||
name = "llvm.SI.gather4";
|
||
break;
|
||
case ac_image_load:
|
||
name = "llvm.SI.image.load";
|
||
break;
|
||
case ac_image_load_mip:
|
||
name = "llvm.SI.image.load.mip";
|
||
break;
|
||
case ac_image_get_lod:
|
||
name = "llvm.SI.getlod";
|
||
break;
|
||
case ac_image_get_resinfo:
|
||
name = "llvm.SI.getresinfo";
|
||
break;
|
||
}
|
||
|
||
ac_build_type_name_for_intr(LLVMTypeOf(a->addr), type, sizeof(type));
|
||
snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.%s",
|
||
name,
|
||
a->compare ? ".c" : "",
|
||
a->bias ? ".b" :
|
||
a->lod ? ".l" :
|
||
a->deriv ? ".d" :
|
||
a->level_zero ? ".lz" : "",
|
||
a->offset ? ".o" : "",
|
||
type);
|
||
|
||
return ac_build_intrinsic(ctx, intr_name,
|
||
dst_type, args, num_args,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
LLVMValueRef ac_build_cvt_pkrtz_f16(struct ac_llvm_context *ctx,
|
||
LLVMValueRef args[2])
|
||
{
|
||
if (HAVE_LLVM >= 0x0500) {
|
||
LLVMTypeRef v2f16 =
|
||
LLVMVectorType(LLVMHalfTypeInContext(ctx->context), 2);
|
||
LLVMValueRef res =
|
||
ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pkrtz",
|
||
v2f16, args, 2,
|
||
AC_FUNC_ATTR_READNONE);
|
||
return LLVMBuildBitCast(ctx->builder, res, ctx->i32, "");
|
||
}
|
||
|
||
return ac_build_intrinsic(ctx, "llvm.SI.packf16", ctx->i32, args, 2,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
LLVMValueRef ac_build_wqm_vote(struct ac_llvm_context *ctx, LLVMValueRef i1)
|
||
{
|
||
assert(HAVE_LLVM >= 0x0600);
|
||
return ac_build_intrinsic(ctx, "llvm.amdgcn.wqm.vote", ctx->i1,
|
||
&i1, 1, AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
void ac_build_kill_if_false(struct ac_llvm_context *ctx, LLVMValueRef i1)
|
||
{
|
||
if (HAVE_LLVM >= 0x0600) {
|
||
ac_build_intrinsic(ctx, "llvm.amdgcn.kill", ctx->voidt,
|
||
&i1, 1, 0);
|
||
return;
|
||
}
|
||
|
||
LLVMValueRef value = LLVMBuildSelect(ctx->builder, i1,
|
||
LLVMConstReal(ctx->f32, 1),
|
||
LLVMConstReal(ctx->f32, -1), "");
|
||
ac_build_intrinsic(ctx, "llvm.AMDGPU.kill", ctx->voidt,
|
||
&value, 1, AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
LLVMValueRef ac_build_bfe(struct ac_llvm_context *ctx, LLVMValueRef input,
|
||
LLVMValueRef offset, LLVMValueRef width,
|
||
bool is_signed)
|
||
{
|
||
LLVMValueRef args[] = {
|
||
input,
|
||
offset,
|
||
width,
|
||
};
|
||
|
||
if (HAVE_LLVM >= 0x0500) {
|
||
return ac_build_intrinsic(ctx,
|
||
is_signed ? "llvm.amdgcn.sbfe.i32" :
|
||
"llvm.amdgcn.ubfe.i32",
|
||
ctx->i32, args, 3,
|
||
AC_FUNC_ATTR_READNONE);
|
||
}
|
||
|
||
return ac_build_intrinsic(ctx,
|
||
is_signed ? "llvm.AMDGPU.bfe.i32" :
|
||
"llvm.AMDGPU.bfe.u32",
|
||
ctx->i32, args, 3,
|
||
AC_FUNC_ATTR_READNONE |
|
||
AC_FUNC_ATTR_LEGACY);
|
||
}
|
||
|
||
void ac_build_waitcnt(struct ac_llvm_context *ctx, unsigned simm16)
|
||
{
|
||
LLVMValueRef args[1] = {
|
||
LLVMConstInt(ctx->i32, simm16, false),
|
||
};
|
||
ac_build_intrinsic(ctx, "llvm.amdgcn.s.waitcnt",
|
||
ctx->voidt, args, 1, 0);
|
||
}
|
||
|
||
void ac_get_image_intr_name(const char *base_name,
|
||
LLVMTypeRef data_type,
|
||
LLVMTypeRef coords_type,
|
||
LLVMTypeRef rsrc_type,
|
||
char *out_name, unsigned out_len)
|
||
{
|
||
char coords_type_name[8];
|
||
|
||
ac_build_type_name_for_intr(coords_type, coords_type_name,
|
||
sizeof(coords_type_name));
|
||
|
||
if (HAVE_LLVM <= 0x0309) {
|
||
snprintf(out_name, out_len, "%s.%s", base_name, coords_type_name);
|
||
} else {
|
||
char data_type_name[8];
|
||
char rsrc_type_name[8];
|
||
|
||
ac_build_type_name_for_intr(data_type, data_type_name,
|
||
sizeof(data_type_name));
|
||
ac_build_type_name_for_intr(rsrc_type, rsrc_type_name,
|
||
sizeof(rsrc_type_name));
|
||
snprintf(out_name, out_len, "%s.%s.%s.%s", base_name,
|
||
data_type_name, coords_type_name, rsrc_type_name);
|
||
}
|
||
}
|
||
|
||
#define AC_EXP_TARGET (HAVE_LLVM >= 0x0500 ? 0 : 3)
|
||
#define AC_EXP_OUT0 (HAVE_LLVM >= 0x0500 ? 2 : 5)
|
||
|
||
enum ac_ir_type {
|
||
AC_IR_UNDEF,
|
||
AC_IR_CONST,
|
||
AC_IR_VALUE,
|
||
};
|
||
|
||
struct ac_vs_exp_chan
|
||
{
|
||
LLVMValueRef value;
|
||
float const_float;
|
||
enum ac_ir_type type;
|
||
};
|
||
|
||
struct ac_vs_exp_inst {
|
||
unsigned offset;
|
||
LLVMValueRef inst;
|
||
struct ac_vs_exp_chan chan[4];
|
||
};
|
||
|
||
struct ac_vs_exports {
|
||
unsigned num;
|
||
struct ac_vs_exp_inst exp[VARYING_SLOT_MAX];
|
||
};
|
||
|
||
/* Return true if the PARAM export has been eliminated. */
|
||
static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset,
|
||
uint32_t num_outputs,
|
||
struct ac_vs_exp_inst *exp)
|
||
{
|
||
unsigned i, default_val; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */
|
||
bool is_zero[4] = {}, is_one[4] = {};
|
||
|
||
for (i = 0; i < 4; i++) {
|
||
/* It's a constant expression. Undef outputs are eliminated too. */
|
||
if (exp->chan[i].type == AC_IR_UNDEF) {
|
||
is_zero[i] = true;
|
||
is_one[i] = true;
|
||
} else if (exp->chan[i].type == AC_IR_CONST) {
|
||
if (exp->chan[i].const_float == 0)
|
||
is_zero[i] = true;
|
||
else if (exp->chan[i].const_float == 1)
|
||
is_one[i] = true;
|
||
else
|
||
return false; /* other constant */
|
||
} else
|
||
return false;
|
||
}
|
||
|
||
/* Only certain combinations of 0 and 1 can be eliminated. */
|
||
if (is_zero[0] && is_zero[1] && is_zero[2])
|
||
default_val = is_zero[3] ? 0 : 1;
|
||
else if (is_one[0] && is_one[1] && is_one[2])
|
||
default_val = is_zero[3] ? 2 : 3;
|
||
else
|
||
return false;
|
||
|
||
/* The PARAM export can be represented as DEFAULT_VAL. Kill it. */
|
||
LLVMInstructionEraseFromParent(exp->inst);
|
||
|
||
/* Change OFFSET to DEFAULT_VAL. */
|
||
for (i = 0; i < num_outputs; i++) {
|
||
if (vs_output_param_offset[i] == exp->offset) {
|
||
vs_output_param_offset[i] =
|
||
AC_EXP_PARAM_DEFAULT_VAL_0000 + default_val;
|
||
break;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
static bool ac_eliminate_duplicated_output(uint8_t *vs_output_param_offset,
|
||
uint32_t num_outputs,
|
||
struct ac_vs_exports *processed,
|
||
struct ac_vs_exp_inst *exp)
|
||
{
|
||
unsigned p, copy_back_channels = 0;
|
||
|
||
/* See if the output is already in the list of processed outputs.
|
||
* The LLVMValueRef comparison relies on SSA.
|
||
*/
|
||
for (p = 0; p < processed->num; p++) {
|
||
bool different = false;
|
||
|
||
for (unsigned j = 0; j < 4; j++) {
|
||
struct ac_vs_exp_chan *c1 = &processed->exp[p].chan[j];
|
||
struct ac_vs_exp_chan *c2 = &exp->chan[j];
|
||
|
||
/* Treat undef as a match. */
|
||
if (c2->type == AC_IR_UNDEF)
|
||
continue;
|
||
|
||
/* If c1 is undef but c2 isn't, we can copy c2 to c1
|
||
* and consider the instruction duplicated.
|
||
*/
|
||
if (c1->type == AC_IR_UNDEF) {
|
||
copy_back_channels |= 1 << j;
|
||
continue;
|
||
}
|
||
|
||
/* Test whether the channels are not equal. */
|
||
if (c1->type != c2->type ||
|
||
(c1->type == AC_IR_CONST &&
|
||
c1->const_float != c2->const_float) ||
|
||
(c1->type == AC_IR_VALUE &&
|
||
c1->value != c2->value)) {
|
||
different = true;
|
||
break;
|
||
}
|
||
}
|
||
if (!different)
|
||
break;
|
||
|
||
copy_back_channels = 0;
|
||
}
|
||
if (p == processed->num)
|
||
return false;
|
||
|
||
/* If a match was found, but the matching export has undef where the new
|
||
* one has a normal value, copy the normal value to the undef channel.
|
||
*/
|
||
struct ac_vs_exp_inst *match = &processed->exp[p];
|
||
|
||
while (copy_back_channels) {
|
||
unsigned chan = u_bit_scan(©_back_channels);
|
||
|
||
assert(match->chan[chan].type == AC_IR_UNDEF);
|
||
LLVMSetOperand(match->inst, AC_EXP_OUT0 + chan,
|
||
exp->chan[chan].value);
|
||
match->chan[chan] = exp->chan[chan];
|
||
}
|
||
|
||
/* The PARAM export is duplicated. Kill it. */
|
||
LLVMInstructionEraseFromParent(exp->inst);
|
||
|
||
/* Change OFFSET to the matching export. */
|
||
for (unsigned i = 0; i < num_outputs; i++) {
|
||
if (vs_output_param_offset[i] == exp->offset) {
|
||
vs_output_param_offset[i] = match->offset;
|
||
break;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
void ac_optimize_vs_outputs(struct ac_llvm_context *ctx,
|
||
LLVMValueRef main_fn,
|
||
uint8_t *vs_output_param_offset,
|
||
uint32_t num_outputs,
|
||
uint8_t *num_param_exports)
|
||
{
|
||
LLVMBasicBlockRef bb;
|
||
bool removed_any = false;
|
||
struct ac_vs_exports exports;
|
||
|
||
exports.num = 0;
|
||
|
||
/* Process all LLVM instructions. */
|
||
bb = LLVMGetFirstBasicBlock(main_fn);
|
||
while (bb) {
|
||
LLVMValueRef inst = LLVMGetFirstInstruction(bb);
|
||
|
||
while (inst) {
|
||
LLVMValueRef cur = inst;
|
||
inst = LLVMGetNextInstruction(inst);
|
||
struct ac_vs_exp_inst exp;
|
||
|
||
if (LLVMGetInstructionOpcode(cur) != LLVMCall)
|
||
continue;
|
||
|
||
LLVMValueRef callee = ac_llvm_get_called_value(cur);
|
||
|
||
if (!ac_llvm_is_function(callee))
|
||
continue;
|
||
|
||
const char *name = LLVMGetValueName(callee);
|
||
unsigned num_args = LLVMCountParams(callee);
|
||
|
||
/* Check if this is an export instruction. */
|
||
if ((num_args != 9 && num_args != 8) ||
|
||
(strcmp(name, "llvm.SI.export") &&
|
||
strcmp(name, "llvm.amdgcn.exp.f32")))
|
||
continue;
|
||
|
||
LLVMValueRef arg = LLVMGetOperand(cur, AC_EXP_TARGET);
|
||
unsigned target = LLVMConstIntGetZExtValue(arg);
|
||
|
||
if (target < V_008DFC_SQ_EXP_PARAM)
|
||
continue;
|
||
|
||
target -= V_008DFC_SQ_EXP_PARAM;
|
||
|
||
/* Parse the instruction. */
|
||
memset(&exp, 0, sizeof(exp));
|
||
exp.offset = target;
|
||
exp.inst = cur;
|
||
|
||
for (unsigned i = 0; i < 4; i++) {
|
||
LLVMValueRef v = LLVMGetOperand(cur, AC_EXP_OUT0 + i);
|
||
|
||
exp.chan[i].value = v;
|
||
|
||
if (LLVMIsUndef(v)) {
|
||
exp.chan[i].type = AC_IR_UNDEF;
|
||
} else if (LLVMIsAConstantFP(v)) {
|
||
LLVMBool loses_info;
|
||
exp.chan[i].type = AC_IR_CONST;
|
||
exp.chan[i].const_float =
|
||
LLVMConstRealGetDouble(v, &loses_info);
|
||
} else {
|
||
exp.chan[i].type = AC_IR_VALUE;
|
||
}
|
||
}
|
||
|
||
/* Eliminate constant and duplicated PARAM exports. */
|
||
if (ac_eliminate_const_output(vs_output_param_offset,
|
||
num_outputs, &exp) ||
|
||
ac_eliminate_duplicated_output(vs_output_param_offset,
|
||
num_outputs, &exports,
|
||
&exp)) {
|
||
removed_any = true;
|
||
} else {
|
||
exports.exp[exports.num++] = exp;
|
||
}
|
||
}
|
||
bb = LLVMGetNextBasicBlock(bb);
|
||
}
|
||
|
||
/* Remove holes in export memory due to removed PARAM exports.
|
||
* This is done by renumbering all PARAM exports.
|
||
*/
|
||
if (removed_any) {
|
||
uint8_t old_offset[VARYING_SLOT_MAX];
|
||
unsigned out, i;
|
||
|
||
/* Make a copy of the offsets. We need the old version while
|
||
* we are modifying some of them. */
|
||
memcpy(old_offset, vs_output_param_offset,
|
||
sizeof(old_offset));
|
||
|
||
for (i = 0; i < exports.num; i++) {
|
||
unsigned offset = exports.exp[i].offset;
|
||
|
||
/* Update vs_output_param_offset. Multiple outputs can
|
||
* have the same offset.
|
||
*/
|
||
for (out = 0; out < num_outputs; out++) {
|
||
if (old_offset[out] == offset)
|
||
vs_output_param_offset[out] = i;
|
||
}
|
||
|
||
/* Change the PARAM offset in the instruction. */
|
||
LLVMSetOperand(exports.exp[i].inst, AC_EXP_TARGET,
|
||
LLVMConstInt(ctx->i32,
|
||
V_008DFC_SQ_EXP_PARAM + i, 0));
|
||
}
|
||
*num_param_exports = exports.num;
|
||
}
|
||
}
|
||
|
||
void ac_init_exec_full_mask(struct ac_llvm_context *ctx)
|
||
{
|
||
LLVMValueRef full_mask = LLVMConstInt(ctx->i64, ~0ull, 0);
|
||
ac_build_intrinsic(ctx,
|
||
"llvm.amdgcn.init.exec", ctx->voidt,
|
||
&full_mask, 1, AC_FUNC_ATTR_CONVERGENT);
|
||
}
|
||
|
||
void ac_declare_lds_as_pointer(struct ac_llvm_context *ctx)
|
||
{
|
||
unsigned lds_size = ctx->chip_class >= CIK ? 65536 : 32768;
|
||
ctx->lds = LLVMBuildIntToPtr(ctx->builder, ctx->i32_0,
|
||
LLVMPointerType(LLVMArrayType(ctx->i32, lds_size / 4), AC_LOCAL_ADDR_SPACE),
|
||
"lds");
|
||
}
|
||
|
||
LLVMValueRef ac_lds_load(struct ac_llvm_context *ctx,
|
||
LLVMValueRef dw_addr)
|
||
{
|
||
return ac_build_load(ctx, ctx->lds, dw_addr);
|
||
}
|
||
|
||
void ac_lds_store(struct ac_llvm_context *ctx,
|
||
LLVMValueRef dw_addr,
|
||
LLVMValueRef value)
|
||
{
|
||
value = ac_to_integer(ctx, value);
|
||
ac_build_indexed_store(ctx, ctx->lds,
|
||
dw_addr, value);
|
||
}
|
||
|
||
LLVMValueRef ac_find_lsb(struct ac_llvm_context *ctx,
|
||
LLVMTypeRef dst_type,
|
||
LLVMValueRef src0)
|
||
{
|
||
LLVMValueRef params[2] = {
|
||
src0,
|
||
|
||
/* The value of 1 means that ffs(x=0) = undef, so LLVM won't
|
||
* add special code to check for x=0. The reason is that
|
||
* the LLVM behavior for x=0 is different from what we
|
||
* need here. However, LLVM also assumes that ffs(x) is
|
||
* in [0, 31], but GLSL expects that ffs(0) = -1, so
|
||
* a conditional assignment to handle 0 is still required.
|
||
*
|
||
* The hardware already implements the correct behavior.
|
||
*/
|
||
LLVMConstInt(ctx->i1, 1, false),
|
||
};
|
||
|
||
LLVMValueRef lsb = ac_build_intrinsic(ctx, "llvm.cttz.i32", ctx->i32,
|
||
params, 2,
|
||
AC_FUNC_ATTR_READNONE);
|
||
|
||
/* TODO: We need an intrinsic to skip this conditional. */
|
||
/* Check for zero: */
|
||
return LLVMBuildSelect(ctx->builder, LLVMBuildICmp(ctx->builder,
|
||
LLVMIntEQ, src0,
|
||
ctx->i32_0, ""),
|
||
LLVMConstInt(ctx->i32, -1, 0), lsb, "");
|
||
}
|
||
|
||
LLVMTypeRef ac_array_in_const_addr_space(LLVMTypeRef elem_type)
|
||
{
|
||
return LLVMPointerType(LLVMArrayType(elem_type, 0),
|
||
AC_CONST_ADDR_SPACE);
|
||
}
|