From: Marek Olšák <marek.ol...@amd.com>
---
src/gallium/drivers/radeon/r600_pipe_common.c | 1 +
src/gallium/drivers/radeon/r600_pipe_common.h | 1 +
src/gallium/drivers/radeonsi/si_shader.c | 16 ++++++++++++++++
3 files changed, 18 insertions(+)
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c
b/src/gallium/drivers/radeon/r600_pipe_common.c
index fa9f70d..5d4a679 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -482,6 +482,7 @@ static const struct debug_named_value
common_debug_options[] = {
{ "sisched", DBG_SI_SCHED, "Enable LLVM SI Machine Instruction
Scheduler." },
{ "mono", DBG_MONOLITHIC_SHADERS, "Use old-style monolithic shaders
compiled on demand" },
{ "noce", DBG_NO_CE, "Disable the constant engine"},
+ { "unsafemath", DBG_UNSAFE_MATH, "Enable unsafe math shader
optimizations" },
DEBUG_NAMED_VALUE_END /* must be last */
};
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h
b/src/gallium/drivers/radeon/r600_pipe_common.h
index 77dfc4f..263ef5e 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -99,6 +99,7 @@
#define DBG_SI_SCHED (1llu << 46)
#define DBG_MONOLITHIC_SHADERS (1llu << 47)
#define DBG_NO_CE (1llu << 48)
+#define DBG_UNSAFE_MATH (1llu << 49)
#define R600_MAP_BUFFER_ALIGNMENT 64
#define R600_MAX_VIEWPORTS 16
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index 6dc4985..bba6a55 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -5255,6 +5255,22 @@ static void si_create_function(struct si_shader_context
*ctx,
else
LLVMAddAttribute(P, LLVMInRegAttribute);
}
+
+ if (ctx->screen->b.debug_flags & DBG_UNSAFE_MATH) {
+ /* These were copied from some LLVM test. */
+ LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
+ "less-precise-fpmad",
+ "true");
+ LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
+ "no-infs-fp-math",
+ "true");
+ LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
+ "no-nans-fp-math",
+ "true");
+ LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
+ "unsafe-fp-math",
+ "true");
+ }
}
static void create_meta_data(struct si_shader_context *ctx)
--
2.7.4
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