diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/s_expm1l.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_expm1l.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/s_expm1l.S b/sysdeps/x86_64/fpu/s_expm1l.S index b4f5a3efda..05a1bfcce1 100644 --- a/sysdeps/x86_64/fpu/s_expm1l.S +++ b/sysdeps/x86_64/fpu/s_expm1l.S @@ -1,5 +1,5 @@ /* ix87 specific implementation of exp(x)-1. - Copyright (C) 1996, 1997, 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 2001, 2002, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. Based on code by John C. Bowman <bowman@ipp-garching.mpg.de>. @@ -48,6 +48,11 @@ l2e: .tfloat 1.442695040888963407359924681002 .text ENTRY(__expm1l) + movzwl 8+8(%rsp), %eax // load sign bit and 15-bit exponent + xorb $0x80, %ah // invert sign bit (now 1 is "positive") + cmpl $0xc006, %eax // is num positive and exp >= 6 (number is >= 128.0)? + jae __ieee754_expl // (if num is denormal, it is at least >= 64.0) + fldt 8(%rsp) // x fxam // Is NaN or +-Inf? fstsw %ax |