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authorUlrich Drepper <drepper@gmail.com>2011-10-22 13:17:30 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-22 13:17:30 -0400
commit77425c63e72bc0c01d81bc7e9ba4bb41d11679e6 (patch)
treec4fea5ed8070fc251140eba66b009bca1ff0e3b5 /math/s_cexpf.c
parentbc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff)
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Add branch predictions to complex math code
Diffstat (limited to 'math/s_cexpf.c')
-rw-r--r--math/s_cexpf.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/math/s_cexpf.c b/math/s_cexpf.c
index 70e4a02588..652fe3d5b2 100644
--- a/math/s_cexpf.c
+++ b/math/s_cexpf.c
@@ -1,5 +1,5 @@
/* Return value of complex exponential function for float complex value.
- Copyright (C) 1997 Free Software Foundation, Inc.
+ Copyright (C) 1997, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -21,7 +21,6 @@
#include <complex.h>
#include <fenv.h>
#include <math.h>
-
#include <math_private.h>
@@ -32,10 +31,10 @@ __cexpf (__complex__ float x)
int rcls = fpclassify (__real__ x);
int icls = fpclassify (__imag__ x);
- if (rcls >= FP_ZERO)
+ if (__builtin_expect (rcls >= FP_ZERO, 1))
{
/* Real part is finite. */
- if (icls >= FP_ZERO)
+ if (__builtin_expect (icls >= FP_ZERO, 1))
{
/* Imaginary part is finite. */
float exp_val = __ieee754_expf (__real__ x);
@@ -61,15 +60,13 @@ __cexpf (__complex__ float x)
__real__ retval = __nanf ("");
__imag__ retval = __nanf ("");
-#ifdef FE_INVALID
feraiseexcept (FE_INVALID);
-#endif
}
}
- else if (rcls == FP_INFINITE)
+ else if (__builtin_expect (rcls == FP_INFINITE, 1))
{
/* Real part is infinite. */
- if (icls >= FP_ZERO)
+ if (__builtin_expect (icls >= FP_ZERO, 1))
{
/* Imaginary part is finite. */
float value = signbit (__real__ x) ? 0.0 : HUGE_VALF;
@@ -95,10 +92,8 @@ __cexpf (__complex__ float x)
__real__ retval = HUGE_VALF;
__imag__ retval = __nanf ("");
-#ifdef FE_INVALID
if (icls == FP_INFINITE)
feraiseexcept (FE_INVALID);
-#endif
}
else
{
@@ -112,10 +107,8 @@ __cexpf (__complex__ float x)
__real__ retval = __nanf ("");
__imag__ retval = __nanf ("");
-#ifdef FE_INVALID
if (rcls != FP_NAN || icls != FP_NAN)
feraiseexcept (FE_INVALID);
-#endif
}
return retval;