diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_frexp.c')
| -rw-r--r-- | sysdeps/m68k/fpu/s_frexp.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/sysdeps/m68k/fpu/s_frexp.c b/sysdeps/m68k/fpu/s_frexp.c index 0cdb5778ee..b06141283c 100644 --- a/sysdeps/m68k/fpu/s_frexp.c +++ b/sysdeps/m68k/fpu/s_frexp.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 2003 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 @@ -28,11 +28,28 @@ #define __CONCATX(a,b) __CONCAT(a,b) float_type -__CONCATX(__,FUNC) (value, expptr) - float_type value; - int *expptr; +__CONCATX(__,FUNC) (float_type value, int *expptr) { - return __m81_u(__CONCATX(__,FUNC))(value, expptr); + float_type mantissa, exponent; + int iexponent; + unsigned long fpsr; + + __asm ("ftst%.x %1\n" + "fmove%.l %/fpsr, %0" + : "=dm" (fpsr) : "f" (value)); + if (fpsr & (7 << 24)) + { + /* Not finite or zero. */ + *expptr = 0; + return value; + } + __asm ("fgetexp%.x %1, %0" : "=f" (exponent) : "f" (value)); + iexponent = (int) exponent + 1; + *expptr = iexponent; + __asm ("fscale%.l %2, %0" + : "=f" (mantissa) + : "0" (value), "dmi" (-iexponent)); + return mantissa; } #define weak_aliasx(a,b) weak_alias(a,b) |