diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/fenv_libc.h')
| -rw-r--r-- | sysdeps/powerpc/fpu/fenv_libc.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu/fenv_libc.h b/sysdeps/powerpc/fpu/fenv_libc.h index b030e6e21e..59c3d5738f 100644 --- a/sysdeps/powerpc/fpu/fenv_libc.h +++ b/sysdeps/powerpc/fpu/fenv_libc.h @@ -48,6 +48,38 @@ extern const fenv_t *__fe_mask_env (void) attribute_hidden; __fr; \ }) +#define __fe_mffscrn(rn) \ + ({register fenv_union_t __fr; \ + if (__builtin_constant_p (rn)) \ + __asm__ __volatile__ ( \ + ".machine push; .machine \"power9\"; mffscrni %0,%1; .machine pop" \ + : "=f" (__fr.fenv) : "i" (rn)); \ + else \ + { \ + __fr.l = (rn); \ + __asm__ __volatile__ ( \ + ".machine push; .machine \"power9\"; mffscrn %0,%1; .machine pop" \ + : "=f" (__fr.fenv) : "f" (__fr.fenv)); \ + } \ + __fr.fenv; \ + }) + +/* Like fegetenv_status, but also sets the rounding mode. */ +#ifdef _ARCH_PWR9 +#define fegetenv_and_set_rn(rn) __fe_mffscrn (rn) +#else +/* 'mffscrn' will decode to 'mffs' on ARCH < 3_00, which is still necessary + but not sufficient, because it does not set the rounding mode. + Explicitly set the rounding mode when 'mffscrn' actually doesn't. */ +#define fegetenv_and_set_rn(rn) \ + ({register fenv_union_t __fr; \ + __fr.fenv = __fe_mffscrn (rn); \ + if (__glibc_unlikely (!(GLRO(dl_hwcap2) & PPC_FEATURE2_ARCH_3_00))) \ + __fesetround_inline (rn); \ + __fr.fenv; \ + }) +#endif + /* Equivalent to fesetenv, but takes a fenv_t instead of a pointer. */ #define fesetenv_register(env) \ do { \ |