XXX: Fastmathfast-math

3 files changed, 15 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
index 5e25819ac55..114e7da8e8c 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
@@ -150,6 +150,15 @@ lp_set_store_alignment(LLVMValueRef Inst,
    llvm::unwrap<llvm::StoreInst>(Inst)->setAlignment(Align);
 }
 
+extern "C"
+void
+lp_set_fast_math_flags(LLVMValueRef Inst)
+{
+   llvm::Instruction *I = llvm::unwrap<llvm::Instruction>(Inst);
+   llvm::FastMathFlags Flags;
+   Flags.setUnsafeAlgebra();
+   I->setFastMathFlags(Flags);
+}
 
 #if HAVE_LLVM < 0x0306
 typedef llvm::JITMemoryManager BaseMemoryManager;
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.h b/src/gallium/auxiliary/gallivm/lp_bld_misc.h
index 36923aa423f..23c14be1125 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.h
@@ -49,6 +49,8 @@ lp_set_target_options(void);
 extern LLVMValueRef
 lp_build_load_volatile(LLVMBuilderRef B, LLVMValueRef PointerVal,
                        const char *Name);
+extern void
+lp_set_fast_math_flags(LLVMValueRef Inst);
 
 extern int
 lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
index 0ad78b0ace2..cfc215c73bc 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
@@ -47,6 +47,7 @@
 #include "lp_bld_const.h"
 #include "lp_bld_gather.h"
 #include "lp_bld_logic.h"
+#include "lp_bld_misc.h"
 
 #include "tgsi/tgsi_exec.h"
 
@@ -94,6 +95,7 @@ add_emit(
    emit_data->output[emit_data->chan] = LLVMBuildFAdd(
                                 bld_base->base.gallivm->builder,
                                 emit_data->args[0], emit_data->args[1], "");
+   lp_set_fast_math_flags(emit_data->output[emit_data->chan]);
 }
 
 /* TGSI_OPCODE_ARR */
@@ -583,6 +585,7 @@ mul_emit(
    emit_data->output[emit_data->chan] = LLVMBuildFMul(
                                    bld_base->base.gallivm->builder,
                                    emit_data->args[0], emit_data->args[1], "");
+   lp_set_fast_math_flags(emit_data->output[emit_data->chan]);
 }
 
 /*.TGSI_OPCODE_DIV.*/
@@ -702,6 +705,7 @@ sub_emit(
       LLVMBuildFSub(bld_base->base.gallivm->builder,
                     emit_data->args[0],
                     emit_data->args[1], "");
+   lp_set_fast_math_flags(emit_data->output[emit_data->chan]);
 }
 
 /* TGSI_OPCODE_F2U */