diff options
Diffstat (limited to 'sysdeps/x86/fpu/s_ffma.c')
| -rw-r--r-- | sysdeps/x86/fpu/s_ffma.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sysdeps/x86/fpu/s_ffma.c b/sysdeps/x86/fpu/s_ffma.c index 95c2dcd7b7..da4bb55f9a 100644 --- a/sysdeps/x86/fpu/s_ffma.c +++ b/sysdeps/x86/fpu/s_ffma.c @@ -27,10 +27,14 @@ #include <math-narrow.h> -#if defined __SSE2_MATH__ && !defined __FP_FAST_FMA +#ifndef __FP_FAST_FMA /* Depending on the details of the glibc configuration, fma might use either SSE or 387 arithmetic; ensure that both parts of the - floating-point state are handled in the round-to-odd code. */ + floating-point state are handled in the round-to-odd code. If + __FP_FAST_FMA is defined, that implies that the compiler is using + SSE floating point and that the fma call will be inlined, so the + x86 macros will work with only the SSE state and that is + sufficient. */ # undef libc_feholdexcept_setround # define libc_feholdexcept_setround default_libc_feholdexcept_setround # undef libc_feupdateenv_test |