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try fixing/optimizing x86_64 fenv exception code
[musl]
/
src
/
math
/
fma.c
diff --git
a/src/math/fma.c
b/src/math/fma.c
index
c53f314
..
f44ecda
100644
(file)
--- a/
src/math/fma.c
+++ b/
src/math/fma.c
@@
-199,27
+199,37
@@
double fma(double x, double y, double z)
* modes other than FE_TONEAREST are painful.
*/
if (spread < -DBL_MANT_DIG) {
* modes other than FE_TONEAREST are painful.
*/
if (spread < -DBL_MANT_DIG) {
+#ifdef FE_INEXACT
feraiseexcept(FE_INEXACT);
feraiseexcept(FE_INEXACT);
+#endif
+#ifdef FE_UNDERFLOW
if (!isnormal(z))
feraiseexcept(FE_UNDERFLOW);
if (!isnormal(z))
feraiseexcept(FE_UNDERFLOW);
+#endif
switch (oround) {
switch (oround) {
- case FE_TONEAREST:
+ default: /* FE_TONEAREST */
return (z);
return (z);
+#ifdef FE_TOWARDZERO
case FE_TOWARDZERO:
if (x > 0.0 ^ y < 0.0 ^ z < 0.0)
return (z);
else
return (nextafter(z, 0));
case FE_TOWARDZERO:
if (x > 0.0 ^ y < 0.0 ^ z < 0.0)
return (z);
else
return (nextafter(z, 0));
+#endif
+#ifdef FE_DOWNWARD
case FE_DOWNWARD:
if (x > 0.0 ^ y < 0.0)
return (z);
else
return (nextafter(z, -INFINITY));
case FE_DOWNWARD:
if (x > 0.0 ^ y < 0.0)
return (z);
else
return (nextafter(z, -INFINITY));
- default: /* FE_UPWARD */
+#endif
+#ifdef FE_UPWARD
+ case FE_UPWARD:
if (x > 0.0 ^ y < 0.0)
return (nextafter(z, INFINITY));
else
return (z);
if (x > 0.0 ^ y < 0.0)
return (nextafter(z, INFINITY));
else
return (z);
+#endif
}
}
if (spread <= DBL_MANT_DIG * 2)
}
}
if (spread <= DBL_MANT_DIG * 2)