From 0e9cdedd2e3943bdb7f3543a3508b883b167e427 Mon Sep 17 00:00:00 2001 From: Grigori Goronzy Date: Thu, 17 Jul 2014 18:44:25 +0200 Subject: radeon/llvm: enable unsafe math for graphics shaders Accuracy of some operations was recently improved in the R600 backend, at the cost of slower code. This is required for compute shaders, but not for graphics shaders. Add unsafe-fp-math hint to make LLVM generate faster but possibly less accurate code. Piglit didn't indicate any regressions. Reviewed-by: Tom Stellard --- src/gallium/drivers/radeon/radeon_llvm_emit.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/gallium') diff --git a/src/gallium/drivers/radeon/radeon_llvm_emit.c b/src/gallium/drivers/radeon/radeon_llvm_emit.c index 1b17dd4613f..171ccaadd5c 100644 --- a/src/gallium/drivers/radeon/radeon_llvm_emit.c +++ b/src/gallium/drivers/radeon/radeon_llvm_emit.c @@ -26,6 +26,7 @@ #include "radeon_llvm_emit.h" #include "radeon_elf_util.h" #include "util/u_memory.h" +#include "pipe/p_shader_tokens.h" #include #include @@ -50,6 +51,10 @@ void radeon_llvm_shader_type(LLVMValueRef F, unsigned type) sprintf(Str, "%1d", type); LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str); + + if (type != TGSI_PROCESSOR_COMPUTE) { + LLVMAddTargetDependentFunctionAttr(F, "unsafe-fp-math", "true"); + } } static void init_r600_target() { -- cgit v1.2.3