diff options
Diffstat (limited to 'sysdeps/alpha/fpu/s_floorf.c')
| -rw-r--r-- | sysdeps/alpha/fpu/s_floorf.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/sysdeps/alpha/fpu/s_floorf.c b/sysdeps/alpha/fpu/s_floorf.c index 9e693642dd..624e7c87b8 100644 --- a/sysdeps/alpha/fpu/s_floorf.c +++ b/sysdeps/alpha/fpu/s_floorf.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson. @@ -27,15 +27,14 @@ float __floorf (float x) { - /* Check not zero since floor(-0) == -0. */ - if (x != 0 && fabsf (x) < 16777216.0f) /* 1 << FLT_MANT_DIG */ + if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */ { /* Note that Alpha S_Floating is stored in registers in a restricted T_Floating format, so we don't even need to convert back to S_Floating in the end. The initial conversion to T_Floating is needed to handle denormals. */ - float tmp1, tmp2; + float tmp1, tmp2, new_x; __asm ("cvtst/s %3,%2\n\t" #ifdef _IEEE_FP_INEXACT @@ -44,8 +43,12 @@ __floorf (float x) "cvttq/svm %2,%1\n\t" #endif "cvtqt/m %1,%0\n\t" - : "=f"(x), "=&f"(tmp1), "=&f"(tmp2) + : "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2) : "f"(x)); + + /* floor(-0) == -0, and in general we'll always have the same + sign as our input. */ + x = copysignf(new_x, x); } return x; } |