Wrap static rounding expf function with #pragma STDC FENV_ACCESS ON

lntue · lntue · commit 98fb0d03d82f · 2025-07-18T22:08:35.000Z
diff --git a/libc/src/__support/math/expf.h b/libc/src/__support/math/expf.h
@@ -109,6 +109,8 @@ static constexpr float expf(float x) {
   return static_cast<float>(exp_hi * exp_mid * exp_lo);
 }
 
+#pragma STDC FENV_ACCESS ON
+
 // Directional rounding version of expf.
 LIBC_INLINE static float expf(float x, int rounding_mode) {
   int current_rounding_mode = fputil::get_round();
@@ -121,6 +123,8 @@ LIBC_INLINE static float expf(float x, int rounding_mode) {
   return result;
 }
 
+#pragma STDC FENV_ACCESS DEFAULT
+
 } // namespace math
 
 } // namespace LIBC_NAMESPACE_DECL

Original file line number	Diff line number	Diff line change
`@@ -109,6 +109,8 @@ static constexpr float expf(float x) {`
`109`	`109`	`return static_cast<float>(exp_hi * exp_mid * exp_lo);`
`110`	`110`	`}`
`111`	`111`
	`112`	`+#pragma STDC FENV_ACCESS ON`
	`113`	`+`
`112`	`114`	`// Directional rounding version of expf.`
`113`	`115`	`LIBC_INLINE static float expf(float x, int rounding_mode) {`
`114`	`116`	`int current_rounding_mode = fputil::get_round();`
`@@ -121,6 +123,8 @@ LIBC_INLINE static float expf(float x, int rounding_mode) {`
`121`	`123`	`return result;`
`122`	`124`	`}`
`123`	`125`
	`126`	`+#pragma STDC FENV_ACCESS DEFAULT`
	`127`	`+`
`124`	`128`	`} // namespace math`
`125`	`129`
`126`	`130`	`} // namespace LIBC_NAMESPACE_DECL`