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radeonsi: Geometry shader micro-optimizations

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Move parameter loads out of loops, and use the instruction offset
instead of a VGPR for the vertex attribute offset when writing to the
ESGS ring buffer.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Michel Dänzer 2014-01-24 16:46:27 +09:00 • committed by Michel Dänzer
parent 3b3687adcb
commit db9d6af862
1 changed files with 10 additions and 12 deletions
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22
src/gallium/drivers/radeonsi/si_shader.c
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@ -842,6 +842,9 @@ static void build_tbuffer_store(struct si_shader_context *shader,
LLVMConstInt(i32, tfe, 0)
};
/* The instruction offset field has 12 bits */
assert(offen || 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"};
@ -1179,6 +1182,8 @@ static void si_llvm_emit_es_epilogue(struct lp_build_tgsi_context * bld_base)
struct si_shader *gs = si_shader_ctx->gs_for_vs;
struct tgsi_parse_context *parse = &si_shader_ctx->parse;
LLVMTypeRef i32 = LLVMInt32TypeInContext(gallivm->context);
LLVMValueRef soffset = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn,
SI_PARAM_ES2GS_OFFSET);
LLVMValueRef t_list_ptr;
LLVMValueRef t_list;
unsigned chan;
@ -1216,20 +1221,14 @@ static void si_llvm_emit_es_epilogue(struct lp_build_tgsi_context * bld_base)
for (chan = 0; chan < 4; chan++) {
LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
LLVMValueRef voffset =
lp_build_const_int32(gallivm,
(4 * gs->input[j].param_offset + chan) * 4);
LLVMValueRef soffset =
LLVMGetParam(si_shader_ctx->radeon_bld.main_fn,
SI_PARAM_ES2GS_OFFSET);
out_val = LLVMBuildBitCast(gallivm->builder, out_val, i32, "");
build_tbuffer_store(si_shader_ctx, t_list, out_val, 1,
voffset, soffset, 0,
LLVMGetUndef(i32), soffset,
(4 * gs->input[j].param_offset + chan) * 4,
V_008F0C_BUF_DATA_FORMAT_32,
V_008F0C_BUF_NUM_FORMAT_UINT,
1, 0, 1, 1, 0);
0, 0, 1, 1, 0);
}
}
}
@ -1901,6 +1900,8 @@ static void si_llvm_emit_vertex(
struct si_shader *shader = &si_shader_ctx->shader->shader;
struct gallivm_state *gallivm = bld_base->base.gallivm;
LLVMTypeRef i32 = LLVMInt32TypeInContext(gallivm->context);
LLVMValueRef soffset = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn,
SI_PARAM_GS2VS_OFFSET);
LLVMValueRef gs_next_vertex;
LLVMValueRef t_list_ptr;
LLVMValueRef t_list;
@ -1936,9 +1937,6 @@ static void si_llvm_emit_vertex(
for (chan = 0; chan < 4; chan++) {
LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
LLVMValueRef soffset =
LLVMGetParam(si_shader_ctx->radeon_bld.main_fn,
SI_PARAM_GS2VS_OFFSET);
LLVMValueRef voffset =
lp_build_const_int32(gallivm, (i * 4 + chan) *
shader->gs_max_out_vertices);