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math: use sqrtl if FLT_EVAL_METHOD==2 in acosh and acoshf

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this makes acosh slightly more precise around 1.0 on i386
This commit is contained in:
Szabolcs Nagy 2013-10-07 18:41:03 +00:00
parent 551da2c191
commit 4b539a826b
2 changed files with 13 additions and 0 deletions
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5
src/math/acosh.c
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@ -1,5 +1,10 @@
#include "libm.h"
#if FLT_EVAL_METHOD==2
#undef sqrt
#define sqrt sqrtl
#endif
/* acosh(x) = log(x + sqrt(x*x-1)) */
double acosh(double x)
{

8
src/math/acoshf.c
View file

@ -1,5 +1,13 @@
#include "libm.h"
#if FLT_EVAL_METHOD==2
#undef sqrtf
#define sqrtf sqrtl
#elif FLT_EVAL_METHOD==1
#undef sqrtf
#define sqrtf sqrt
#endif
/* acosh(x) = log(x + sqrt(x*x-1)) */
float acoshf(float x)
{