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gallivm: use llvm jit code for decoding s3tc

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This is (much) faster than using the util fallback.
(Note that there's two methods here, one would use a cache, similar to
the existing code (although the cache was disabled), except the block
decode is done with jit code, the other directly decodes the required
pixels. For now don't use the cache (being direct-mapped is suboptimal,
but it's difficult to come up with something better which doesn't have
too much overhead.)

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Roland Scheidegger
2018-12-19 04:37:36 +01:00
parent ec1d5841fa
commit 6f4083143b
7 changed files with 2239 additions and 383 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/gallium/auxiliary/Makefile.sources
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@@ -418,11 +418,11 @@ GALLIVM_SOURCES := \
gallivm/lp_bld_flow.h \
gallivm/lp_bld_format_aos_array.c \
gallivm/lp_bld_format_aos.c \
gallivm/lp_bld_format_cached.c \
gallivm/lp_bld_format_float.c \
gallivm/lp_bld_format.c \
gallivm/lp_bld_format.h \
gallivm/lp_bld_format_soa.c \
gallivm/lp_bld_format_s3tc.c \
gallivm/lp_bld_format_srgb.c \
gallivm/lp_bld_format_yuv.c \
gallivm/lp_bld_gather.c \

6
src/gallium/auxiliary/gallivm/lp_bld_format.h
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@@ -165,8 +165,12 @@ lp_build_fetch_subsampled_rgba_aos(struct gallivm_state *gallivm,
LLVMValueRef j);
/*
* S3TC
*/
LLVMValueRef
lp_build_fetch_cached_texels(struct gallivm_state *gallivm,
lp_build_fetch_s3tc_rgba_aos(struct gallivm_state *gallivm,
const struct util_format_description *format_desc,
unsigned n,
LLVMValueRef base_ptr,

5
src/gallium/auxiliary/gallivm/lp_bld_format_aos.c
View File

@@ -464,6 +464,7 @@ lp_build_pack_rgba_aos(struct gallivm_state *gallivm,
* \param ptr address of the pixel block (or the texel if uncompressed)
* \param i, j the sub-block pixel coordinates. For non-compressed formats
* these will always be (0, 0).
* \param cache optional value pointing to a lp_build_format_cache structure
* \return a 4 element vector with the pixel's RGBA values.
*/
LLVMValueRef
@@ -728,7 +729,7 @@ lp_build_fetch_rgba_aos(struct gallivm_state *gallivm,
* s3tc rgb formats
*/
if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC && cache) {
if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
struct lp_type tmp_type;
LLVMValueRef tmp;
@@ -737,7 +738,7 @@ lp_build_fetch_rgba_aos(struct gallivm_state *gallivm,
tmp_type.length = num_pixels * 4;
tmp_type.norm = TRUE;
tmp = lp_build_fetch_cached_texels(gallivm,
tmp = lp_build_fetch_s3tc_rgba_aos(gallivm,
format_desc,
num_pixels,
base_ptr,

374
src/gallium/auxiliary/gallivm/lp_bld_format_cached.c
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@@ -1,374 +0,0 @@
/**************************************************************************
*
* Copyright 2015 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "lp_bld_format.h"
#include "lp_bld_type.h"
#include "lp_bld_struct.h"
#include "lp_bld_const.h"
#include "lp_bld_flow.h"
#include "lp_bld_swizzle.h"
#include "util/u_math.h"
/**
* @file
* Complex block-compression based formats are handled here by using a cache,
* so re-decoding of every pixel is not required.
* Especially for bilinear filtering, texel reuse is very high hence even
* a small cache helps.
* The elements in the cache are the decoded blocks - currently things
* are restricted to formats which are 4x4 block based, and the decoded
* texels must fit into 4x8 bits.
* The cache is direct mapped so hitrates aren't all that great and cache
* thrashing could happen.
*
* @author Roland Scheidegger <sroland@vmware.com>
*/
#if LP_BUILD_FORMAT_CACHE_DEBUG
static void
update_cache_access(struct gallivm_state *gallivm,
LLVMValueRef ptr,
unsigned count,
unsigned index)
{
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef member_ptr, cache_access;
assert(index == LP_BUILD_FORMAT_CACHE_MEMBER_ACCESS_TOTAL ||
index == LP_BUILD_FORMAT_CACHE_MEMBER_ACCESS_MISS);
member_ptr = lp_build_struct_get_ptr(gallivm, ptr, index, "");
cache_access = LLVMBuildLoad(builder, member_ptr, "cache_access");
cache_access = LLVMBuildAdd(builder, cache_access,
LLVMConstInt(LLVMInt64TypeInContext(gallivm->context),
count, 0), "");
LLVMBuildStore(builder, cache_access, member_ptr);
}
#endif
static void
store_cached_block(struct gallivm_state *gallivm,
LLVMValueRef *col,
LLVMValueRef tag_value,
LLVMValueRef hash_index,
LLVMValueRef cache)
{
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef ptr, indices[3];
LLVMTypeRef type_ptr4x32;
unsigned count;
type_ptr4x32 = LLVMPointerType(LLVMVectorType(LLVMInt32TypeInContext(gallivm->context), 4), 0);
indices[0] = lp_build_const_int32(gallivm, 0);
indices[1] = lp_build_const_int32(gallivm, LP_BUILD_FORMAT_CACHE_MEMBER_TAGS);
indices[2] = hash_index;
ptr = LLVMBuildGEP(builder, cache, indices, ARRAY_SIZE(indices), "");
LLVMBuildStore(builder, tag_value, ptr);
indices[1] = lp_build_const_int32(gallivm, LP_BUILD_FORMAT_CACHE_MEMBER_DATA);
hash_index = LLVMBuildMul(builder, hash_index,
lp_build_const_int32(gallivm, 16), "");
for (count = 0; count < 4; count++) {
indices[2] = hash_index;
ptr = LLVMBuildGEP(builder, cache, indices, ARRAY_SIZE(indices), "");
ptr = LLVMBuildBitCast(builder, ptr, type_ptr4x32, "");
LLVMBuildStore(builder, col[count], ptr);
hash_index = LLVMBuildAdd(builder, hash_index,
lp_build_const_int32(gallivm, 4), "");
}
}
static LLVMValueRef
lookup_cached_pixel(struct gallivm_state *gallivm,
LLVMValueRef ptr,
LLVMValueRef index)
{
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef member_ptr, indices[3];
indices[0] = lp_build_const_int32(gallivm, 0);
indices[1] = lp_build_const_int32(gallivm, LP_BUILD_FORMAT_CACHE_MEMBER_DATA);
indices[2] = index;
member_ptr = LLVMBuildGEP(builder, ptr, indices, ARRAY_SIZE(indices), "");
return LLVMBuildLoad(builder, member_ptr, "cache_data");
}
static LLVMValueRef
lookup_tag_data(struct gallivm_state *gallivm,
LLVMValueRef ptr,
LLVMValueRef index)
{
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef member_ptr, indices[3];
indices[0] = lp_build_const_int32(gallivm, 0);
indices[1] = lp_build_const_int32(gallivm, LP_BUILD_FORMAT_CACHE_MEMBER_TAGS);
indices[2] = index;
member_ptr = LLVMBuildGEP(builder, ptr, indices, ARRAY_SIZE(indices), "");
return LLVMBuildLoad(builder, member_ptr, "tag_data");
}
static void
update_cached_block(struct gallivm_state *gallivm,
const struct util_format_description *format_desc,
LLVMValueRef ptr_addr,
LLVMValueRef hash_index,
LLVMValueRef cache)
{
LLVMBuilderRef builder = gallivm->builder;
LLVMTypeRef i8t = LLVMInt8TypeInContext(gallivm->context);
LLVMTypeRef pi8t = LLVMPointerType(i8t, 0);
LLVMTypeRef i32t = LLVMInt32TypeInContext(gallivm->context);
LLVMTypeRef i32x4 = LLVMVectorType(LLVMInt32TypeInContext(gallivm->context), 4);
LLVMValueRef function;
LLVMValueRef tag_value, tmp_ptr;
LLVMValueRef col[4];
unsigned i, j;
/*
* Use format_desc->fetch_rgba_8unorm() for each pixel in the block.
* This doesn't actually make any sense whatsoever, someone would need
* to write a function doing this for all pixels in a block (either as
* an external c function or with generated code). Don't ask.
*/
{
/*
* Function to call looks like:
* fetch(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
*/
LLVMTypeRef ret_type;
LLVMTypeRef arg_types[4];
LLVMTypeRef function_type;
assert(format_desc->fetch_rgba_8unorm);
ret_type = LLVMVoidTypeInContext(gallivm->context);
arg_types[0] = pi8t;
arg_types[1] = pi8t;
arg_types[2] = i32t;
arg_types[3] = i32t;
function_type = LLVMFunctionType(ret_type, arg_types,
ARRAY_SIZE(arg_types), 0);
/* make const pointer for the C fetch_rgba_8unorm function */
function = lp_build_const_int_pointer(gallivm,
func_to_pointer((func_pointer) format_desc->fetch_rgba_8unorm));
/* cast the callee pointer to the function's type */
function = LLVMBuildBitCast(builder, function,
LLVMPointerType(function_type, 0),
"cast callee");
}
tmp_ptr = lp_build_array_alloca(gallivm, i32x4,
lp_build_const_int32(gallivm, 16),
"tmp_decode_store");
tmp_ptr = LLVMBuildBitCast(builder, tmp_ptr, pi8t, "");
/*
* Invoke format_desc->fetch_rgba_8unorm() for each pixel.
* This is going to be really really slow.
* Note: the block store format is actually
* x0y0x0y1x0y2x0y3 x1y0x1y1x1y2x1y3 ...
*/
for (i = 0; i < 4; ++i) {
for (j = 0; j < 4; ++j) {
LLVMValueRef args[4];
LLVMValueRef dst_offset = lp_build_const_int32(gallivm, (i * 4 + j) * 4);
/*
* Note we actually supply a pointer to the start of the block,
* not the start of the texture.
*/
args[0] = LLVMBuildGEP(gallivm->builder, tmp_ptr, &dst_offset, 1, "");
args[1] = ptr_addr;
args[2] = LLVMConstInt(i32t, i, 0);
args[3] = LLVMConstInt(i32t, j, 0);
LLVMBuildCall(builder, function, args, ARRAY_SIZE(args), "");
}
}
/* Finally store the block - pointless mem copy + update tag. */
tmp_ptr = LLVMBuildBitCast(builder, tmp_ptr, LLVMPointerType(i32x4, 0), "");
for (i = 0; i < 4; ++i) {
LLVMValueRef tmp_offset = lp_build_const_int32(gallivm, i);
LLVMValueRef ptr = LLVMBuildGEP(gallivm->builder, tmp_ptr, &tmp_offset, 1, "");
col[i] = LLVMBuildLoad(builder, ptr, "");
}
tag_value = LLVMBuildPtrToInt(gallivm->builder, ptr_addr,
LLVMInt64TypeInContext(gallivm->context), "");
store_cached_block(gallivm, col, tag_value, hash_index, cache);
}
/*
* Do a cached lookup.
*
* Returns (vectors of) 4x8 rgba aos value
*/
LLVMValueRef
lp_build_fetch_cached_texels(struct gallivm_state *gallivm,
const struct util_format_description *format_desc,
unsigned n,
LLVMValueRef base_ptr,
LLVMValueRef offset,
LLVMValueRef i,
LLVMValueRef j,
LLVMValueRef cache)
{
LLVMBuilderRef builder = gallivm->builder;
unsigned count, low_bit, log2size;
LLVMValueRef color, offset_stored, addr, ptr_addrtrunc, tmp;
LLVMValueRef ij_index, hash_index, hash_mask, block_index;
LLVMTypeRef i8t = LLVMInt8TypeInContext(gallivm->context);
LLVMTypeRef i32t = LLVMInt32TypeInContext(gallivm->context);
LLVMTypeRef i64t = LLVMInt64TypeInContext(gallivm->context);
struct lp_type type;
struct lp_build_context bld32;
memset(&type, 0, sizeof type);
type.width = 32;
type.length = n;
assert(format_desc->block.width == 4);
assert(format_desc->block.height == 4);
lp_build_context_init(&bld32, gallivm, type);
/*
* compute hash - we use direct mapped cache, the hash function could
* be better but it needs to be simple
* per-element:
* compare offset with offset stored at tag (hash)
* if not equal decode/store block, update tag
* extract color from cache
* assemble result vector
*/
/* TODO: not ideal with 32bit pointers... */
low_bit = util_logbase2(format_desc->block.bits / 8);
log2size = util_logbase2(LP_BUILD_FORMAT_CACHE_SIZE);
addr = LLVMBuildPtrToInt(builder, base_ptr, i64t, "");
ptr_addrtrunc = LLVMBuildPtrToInt(builder, base_ptr, i32t, "");
ptr_addrtrunc = lp_build_broadcast_scalar(&bld32, ptr_addrtrunc);
/* For the hash function, first mask off the unused lowest bits. Then just
do some xor with address bits - only use lower 32bits */
ptr_addrtrunc = LLVMBuildAdd(builder, offset, ptr_addrtrunc, "");
ptr_addrtrunc = LLVMBuildLShr(builder, ptr_addrtrunc,
lp_build_const_int_vec(gallivm, type, low_bit), "");
/* This only really makes sense for size 64,128,256 */
hash_index = ptr_addrtrunc;
ptr_addrtrunc = LLVMBuildLShr(builder, ptr_addrtrunc,
lp_build_const_int_vec(gallivm, type, 2*log2size), "");
hash_index = LLVMBuildXor(builder, ptr_addrtrunc, hash_index, "");
tmp = LLVMBuildLShr(builder, hash_index,
lp_build_const_int_vec(gallivm, type, log2size), "");
hash_index = LLVMBuildXor(builder, hash_index, tmp, "");
hash_mask = lp_build_const_int_vec(gallivm, type, LP_BUILD_FORMAT_CACHE_SIZE - 1);
hash_index = LLVMBuildAnd(builder, hash_index, hash_mask, "");
ij_index = LLVMBuildShl(builder, i, lp_build_const_int_vec(gallivm, type, 2), "");
ij_index = LLVMBuildAdd(builder, ij_index, j, "");
block_index = LLVMBuildShl(builder, hash_index,
lp_build_const_int_vec(gallivm, type, 4), "");
block_index = LLVMBuildAdd(builder, ij_index, block_index, "");
if (n > 1) {
color = LLVMGetUndef(LLVMVectorType(i32t, n));
for (count = 0; count < n; count++) {
LLVMValueRef index, cond, colorx;
LLVMValueRef block_indexx, hash_indexx, addrx, offsetx, ptr_addrx;
struct lp_build_if_state if_ctx;
index = lp_build_const_int32(gallivm, count);
offsetx = LLVMBuildExtractElement(builder, offset, index, "");
addrx = LLVMBuildZExt(builder, offsetx, i64t, "");
addrx = LLVMBuildAdd(builder, addrx, addr, "");
block_indexx = LLVMBuildExtractElement(builder, block_index, index, "");
hash_indexx = LLVMBuildLShr(builder, block_indexx,
lp_build_const_int32(gallivm, 4), "");
offset_stored = lookup_tag_data(gallivm, cache, hash_indexx);
cond = LLVMBuildICmp(builder, LLVMIntNE, offset_stored, addrx, "");
lp_build_if(&if_ctx, gallivm, cond);
{
ptr_addrx = LLVMBuildIntToPtr(builder, addrx,
LLVMPointerType(i8t, 0), "");
update_cached_block(gallivm, format_desc, ptr_addrx, hash_indexx, cache);
#if LP_BUILD_FORMAT_CACHE_DEBUG
update_cache_access(gallivm, cache, 1,
LP_BUILD_FORMAT_CACHE_MEMBER_ACCESS_MISS);
#endif
}
lp_build_endif(&if_ctx);
colorx = lookup_cached_pixel(gallivm, cache, block_indexx);
color = LLVMBuildInsertElement(builder, color, colorx,
lp_build_const_int32(gallivm, count), "");
}
}
else {
LLVMValueRef cond;
struct lp_build_if_state if_ctx;
tmp = LLVMBuildZExt(builder, offset, i64t, "");
addr = LLVMBuildAdd(builder, tmp, addr, "");
offset_stored = lookup_tag_data(gallivm, cache, hash_index);
cond = LLVMBuildICmp(builder, LLVMIntNE, offset_stored, addr, "");
lp_build_if(&if_ctx, gallivm, cond);
{
tmp = LLVMBuildIntToPtr(builder, addr, LLVMPointerType(i8t, 0), "");
update_cached_block(gallivm, format_desc, tmp, hash_index, cache);
#if LP_BUILD_FORMAT_CACHE_DEBUG
update_cache_access(gallivm, cache, 1,
LP_BUILD_FORMAT_CACHE_MEMBER_ACCESS_MISS);
#endif
}
lp_build_endif(&if_ctx);
color = lookup_cached_pixel(gallivm, cache, block_index);
}
#if LP_BUILD_FORMAT_CACHE_DEBUG
update_cache_access(gallivm, cache, n,
LP_BUILD_FORMAT_CACHE_MEMBER_ACCESS_TOTAL);
#endif
return LLVMBuildBitCast(builder, color, LLVMVectorType(i8t, n * 4), "");
}

2229
src/gallium/auxiliary/gallivm/lp_bld_format_s3tc.c Normal file
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File diff suppressed because it is too large Load Diff

4
src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
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@@ -3549,10 +3549,6 @@ lp_build_sample_soa_func(struct gallivm_state *gallivm,
const struct util_format_description *format_desc;
format_desc = util_format_description(static_texture_state->format);
if (format_desc && format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
/*
* This is not 100% correct, if we have cache but the
* util_format_s3tc_prefer is true the cache won't get used
* regardless (could hook up the block decode there...) */
need_cache = TRUE;
}
}

2
src/gallium/auxiliary/meson.build
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@@ -389,8 +389,8 @@ if with_llvm
'gallivm/lp_bld_flow.h',
'gallivm/lp_bld_format_aos_array.c',
'gallivm/lp_bld_format_aos.c',
'gallivm/lp_bld_format_cached.c',
'gallivm/lp_bld_format_float.c',
'gallivm/lp_bld_format_s3tc.c',
'gallivm/lp_bld_format.c',
'gallivm/lp_bld_format.h',
'gallivm/lp_bld_format_soa.c',