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radeonsi: Enable dynamic HS.

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This allows running the TES on different CU's than the
TCS which results in performance improvements.

v2: Only write the control word from one invocation.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Bas Nieuwenhuizen 2016-05-02 14:59:43 +02:00
parent 26f436132b
commit fee3160af9
2 changed files with 16 additions and 5 deletions
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19
src/gallium/drivers/radeonsi/si_shader.c
View file

@ -2532,7 +2532,7 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
LLVMValueRef lds_base, lds_inner, lds_outer, byteoffset, buffer;
LLVMValueRef out[6], vec0, vec1, rw_buffers, tf_base;
unsigned stride, outer_comps, inner_comps, i;
struct lp_build_if_state if_ctx;
struct lp_build_if_state if_ctx, inner_if_ctx;
/* Do this only for invocation 0, because the tess levels are per-patch,
* not per-vertex.
@ -2604,12 +2604,23 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
byteoffset = LLVMBuildMul(gallivm->builder, rel_patch_id,
lp_build_const_int32(gallivm, 4 * stride), "");
/* Store the outputs. */
lp_build_if(&inner_if_ctx, gallivm,
LLVMBuildICmp(gallivm->builder, LLVMIntEQ,
rel_patch_id, bld_base->uint_bld.zero, ""));
/* Store the dynamic HS control word. */
build_tbuffer_store_dwords(ctx, buffer,
lp_build_const_int32(gallivm, 0x80000000),
1, lp_build_const_int32(gallivm, 0), tf_base, 0);
lp_build_endif(&inner_if_ctx);
/* Store the tessellation factors. */
build_tbuffer_store_dwords(ctx, buffer, vec0,
MIN2(stride, 4), byteoffset, tf_base, 0);
MIN2(stride, 4), byteoffset, tf_base, 4);
if (vec1)
build_tbuffer_store_dwords(ctx, buffer, vec1,
stride - 4, byteoffset, tf_base, 16);
stride - 4, byteoffset, tf_base, 20);
lp_build_endif(&if_ctx);
}

2
src/gallium/drivers/radeonsi/si_state_shaders.c
View file

@ -1882,7 +1882,7 @@ static void si_update_vgt_shader_config(struct si_context *sctx)
if (sctx->tes_shader.cso) {
stages |= S_028B54_LS_EN(V_028B54_LS_STAGE_ON) |
S_028B54_HS_EN(1);
S_028B54_HS_EN(1) | S_028B54_DYNAMIC_HS(1);
if (sctx->gs_shader.cso)
stages |= S_028B54_ES_EN(V_028B54_ES_STAGE_DS) |