diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/fenv_libc.h')
| -rw-r--r-- | sysdeps/powerpc/fpu/fenv_libc.h | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/sysdeps/powerpc/fpu/fenv_libc.h b/sysdeps/powerpc/fpu/fenv_libc.h index 7ae12a7d2b..fd5fc0c767 100644 --- a/sysdeps/powerpc/fpu/fenv_libc.h +++ b/sysdeps/powerpc/fpu/fenv_libc.h @@ -1,5 +1,5 @@ /* Internal libc stuff for floating point environment routines. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -54,6 +54,41 @@ typedef union unsigned int l[2]; } fenv_union_t; + +static inline int +__fegetround (void) +{ + int result; + asm volatile ("mcrfs 7,7\n\t" + "mfcr %0" : "=r"(result) : : "cr7"); + return result & 3; +} +#define fegetround() __fegetround() + +static inline int +__fesetround (int round) +{ + if ((unsigned int) round < 2) + { + asm volatile ("mtfsb0 30"); + if ((unsigned int) round == 0) + asm volatile ("mtfsb0 31"); + else + asm volatile ("mtfsb1 31"); + } + else + { + asm volatile ("mtfsb1 30"); + if ((unsigned int) round == 2) + asm volatile ("mtfsb0 31"); + else + asm volatile ("mtfsb1 31"); + } + + return 0; +} +#define fesetround(mode) __fesetround(mode) + /* Definitions of all the FPSCR bit numbers */ enum { FPSCR_FX = 0, /* exception summary */ |