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ac,radeonsi: fix load_first_vertex

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GL doesn't use it, so this change is not necessary, but it's better
this way.

There is also a small cleanup using si_unpack_param.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7721>
This commit is contained in:
Marek Olšák
2020-11-25 02:13:27 -05:00
parent 80a0f8aba3
commit d7ee265a95
4 changed files with 10 additions and 8 deletions
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3
src/amd/llvm/ac_nir_to_llvm.c
View File

@@ -3316,7 +3316,8 @@ static void visit_intrinsic(struct ac_nir_context *ctx, nir_intrinsic_instr *ins
}
case nir_intrinsic_load_base_vertex:
case nir_intrinsic_load_first_vertex:
result = ctx->abi->load_base_vertex(ctx->abi);
result = ctx->abi->load_base_vertex(ctx->abi,
instr->intrinsic == nir_intrinsic_load_base_vertex);
break;
case nir_intrinsic_load_local_group_size:
result = ctx->abi->load_local_group_size(ctx->abi);

2
src/amd/llvm/ac_shader_abi.h
View File

@@ -145,7 +145,7 @@ struct ac_shader_abi {
LLVMValueRef (*load_sample_mask_in)(struct ac_shader_abi *abi);
LLVMValueRef (*load_base_vertex)(struct ac_shader_abi *abi);
LLVMValueRef (*load_base_vertex)(struct ac_shader_abi *abi, bool non_indexed_is_zero);
LLVMValueRef (*emit_fbfetch)(struct ac_shader_abi *abi);

2
src/amd/vulkan/radv_nir_to_llvm.c
View File

@@ -863,7 +863,7 @@ load_patch_vertices_in(struct ac_shader_abi *abi)
}
static LLVMValueRef radv_load_base_vertex(struct ac_shader_abi *abi)
static LLVMValueRef radv_load_base_vertex(struct ac_shader_abi *abi, bool non_indexed_is_zero)
{
struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
return ac_get_arg(&ctx->ac, ctx->args->ac.base_vertex);

11
src/gallium/drivers/radeonsi/si_shader_llvm_vs.c
View File

@@ -1054,18 +1054,19 @@ void si_llvm_build_vs_prolog(struct si_shader_context *ctx, union si_shader_part
si_llvm_build_ret(ctx, ret);
}
static LLVMValueRef get_base_vertex(struct ac_shader_abi *abi)
static LLVMValueRef get_base_vertex(struct ac_shader_abi *abi, bool non_indexed_is_zero)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
/* This doesn't happen with GL: */
if (!non_indexed_is_zero)
return ac_get_arg(&ctx->ac, ctx->args.base_vertex);
/* For non-indexed draws, the base vertex set by the driver
* (for direct draws) or the CP (for indirect draws) is the
* first vertex ID, but GLSL expects 0 to be returned.
*/
LLVMValueRef vs_state = ac_get_arg(&ctx->ac, ctx->vs_state_bits);
LLVMValueRef indexed;
indexed = LLVMBuildLShr(ctx->ac.builder, vs_state, ctx->ac.i32_1, "");
LLVMValueRef indexed = si_unpack_param(ctx, ctx->vs_state_bits, 1, 1);
indexed = LLVMBuildTrunc(ctx->ac.builder, indexed, ctx->ac.i1, "");
return LLVMBuildSelect(ctx->ac.builder, indexed, ac_get_arg(&ctx->ac, ctx->args.base_vertex),