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Utils: update fp_utils for Msan.

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Vincent Furnon
2015-05-22 19:07:34 +02:00
parent 2afb050467
commit 5c35352870
1 changed files with 3 additions and 3 deletions
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6
src/util/fp_utils.h
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@@ -108,7 +108,7 @@ class ScopedFloatingPointEnv {
// being modified. This can be used to avoid wrong over-optimizations by gcc.
// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47617 for an explanation.
#ifdef NDEBUG
#define TOUCH(var) asm("" : "+X"(var))
#define TOUCH(var) asm volatile("" : "+X"(var))
#else
#define TOUCH(var)
#endif
@@ -116,7 +116,7 @@ class ScopedFloatingPointEnv {
#if (defined(__i386__) || defined(__x86_64__)) && defined(__linux__) && \
!defined(__ANDROID__)
inline fpu_control_t GetFPPrecision() {
fpu_control_t status;
fpu_control_t status = 0; // Initialized to zero to please memory sanitizer.
_FPU_GETCW(status);
return status & (_FPU_EXTENDED | _FPU_DOUBLE | _FPU_SINGLE);
}
@@ -125,7 +125,7 @@ inline fpu_control_t GetFPPrecision() {
// CPU precision control. Parameters can be:
// _FPU_EXTENDED, _FPU_DOUBLE or _FPU_SINGLE.
inline void SetFPPrecision(fpu_control_t precision) {
fpu_control_t status;
fpu_control_t status = 0; // Initialized to zero to please memory sanitizer.
_FPU_GETCW(status);
TOUCH(status);
status &= ~(_FPU_EXTENDED | _FPU_DOUBLE | _FPU_SINGLE);