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radeonsi: compute how many input SGPRs and VGPRs shaders have

Browse source 
Prologs (shader binaries inserted before the API shader binary) need to
know this, so that they won't change the input registers unintentionally.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-01-01 20:37:38 +01:00
parent 36202182ac
commit fe1b6ede01
2 changed files with 34 additions and 0 deletions
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32
src/gallium/drivers/radeonsi/si_shader.c
View file

@ -3580,6 +3580,26 @@ static void declare_streamout_params(struct si_shader_context *ctx,
}
}
static unsigned llvm_get_type_size(LLVMTypeRef type)
{
LLVMTypeKind kind = LLVMGetTypeKind(type);
switch (kind) {
case LLVMIntegerTypeKind:
return LLVMGetIntTypeWidth(type) / 8;
case LLVMFloatTypeKind:
return 4;
case LLVMPointerTypeKind:
return 8;
case LLVMVectorTypeKind:
return LLVMGetVectorSize(type) *
llvm_get_type_size(LLVMGetElementType(type));
default:
assert(0);
return 0;
}
}
static void create_function(struct si_shader_context *ctx)
{
struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
@ -3717,6 +3737,9 @@ static void create_function(struct si_shader_context *ctx)
radeon_llvm_shader_type(ctx->radeon_bld.main_fn, ctx->type);
ctx->return_value = LLVMGetUndef(ctx->radeon_bld.return_type);
shader->num_input_sgprs = 0;
shader->num_input_vgprs = 0;
for (i = 0; i <= last_sgpr; ++i) {
LLVMValueRef P = LLVMGetParam(ctx->radeon_bld.main_fn, i);
@ -3726,8 +3749,17 @@ static void create_function(struct si_shader_context *ctx)
LLVMAddAttribute(P, LLVMByValAttribute);
else
LLVMAddAttribute(P, LLVMInRegAttribute);
shader->num_input_sgprs += llvm_get_type_size(params[i]) / 4;
}
/* Unused fragment shader inputs are eliminated by the compiler,
* so we don't know yet how many there will be.
*/
if (ctx->type != TGSI_PROCESSOR_FRAGMENT)
for (; i < num_params; ++i)
shader->num_input_vgprs += llvm_get_type_size(params[i]) / 4;
if (bld_base->info &&
(bld_base->info->opcode_count[TGSI_OPCODE_DDX] > 0 ||
bld_base->info->opcode_count[TGSI_OPCODE_DDY] > 0 ||

2
src/gallium/drivers/radeonsi/si_shader.h
View file

@ -279,6 +279,8 @@ struct si_shader {
struct radeon_shader_binary binary;
struct si_shader_config config;
ubyte num_input_sgprs;
ubyte num_input_vgprs;
unsigned vs_output_param_offset[PIPE_MAX_SHADER_OUTPUTS];
bool uses_instanceid;
unsigned nr_pos_exports;