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radeonsi: fix the Witcher 2 black transitions

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v2: do it properly

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98238

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák
2017-01-03 20:12:28 +01:00
parent 5b85a6b3f7
commit cac74a9bcc
1 changed files with 13 additions and 2 deletions
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15
src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c
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@@ -636,6 +636,15 @@ store_value_to_array(struct lp_build_tgsi_context *bld_base,
}
}
/* If this is true, preload FS inputs at the beginning of shaders. Otherwise,
* reload them at each use. This must be true if the shader is using
* derivatives, because all inputs should be loaded in the WQM mode.
*/
static bool si_preload_fs_inputs(struct si_shader_context *ctx)
{
return ctx->shader->selector->info.uses_derivatives;
}
LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type,
@@ -688,7 +697,8 @@ LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
* only once. Fragment shaders don't care much, because
* v_interp instructions are much cheaper than VMEM loads.
*/
if (ctx->soa.bld_base.info->processor == PIPE_SHADER_FRAGMENT)
if (!si_preload_fs_inputs(ctx) &&
ctx->soa.bld_base.info->processor == PIPE_SHADER_FRAGMENT)
ctx->load_input(ctx, index, &ctx->input_decls[index], input);
else
memcpy(input, &ctx->inputs[index * 4], sizeof(input));
@@ -881,7 +891,8 @@ static void emit_declaration(struct lp_build_tgsi_context *bld_base,
ctx->input_decls[idx].Range.Last = idx;
ctx->input_decls[idx].Semantic.Index += idx - decl->Range.First;
if (bld_base->info->processor != PIPE_SHADER_FRAGMENT)
if (si_preload_fs_inputs(ctx) ||
bld_base->info->processor != PIPE_SHADER_FRAGMENT)
ctx->load_input(ctx, idx, &ctx->input_decls[idx],
&ctx->inputs[idx * 4]);
}