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libm: Provide fallback definitions for isnan() and isinf() 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-06-26 19:22:12 +03:00
parent ef882e464a
commit 46df708b45
2 changed files with 25 additions and 0 deletions
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4
configure vendored
View File

@ -1093,6 +1093,8 @@ HAVE_LIST="
inet_aton
inline_asm
isatty
isinf
isnan
jack_port_get_latency_range
ldbrx
libdc1394_1
@ -2922,6 +2924,8 @@ enabled vaapi && require vaapi va/va.h vaInitialize -lva
check_mathfunc cbrtf
check_mathfunc exp2
check_mathfunc exp2f
check_mathfunc isinf
check_mathfunc isnan
check_mathfunc llrint
check_mathfunc llrintf
check_mathfunc log2

21
libavutil/libm.h
View File

@ -27,6 +27,7 @@
#include <math.h>
#include "config.h"
#include "attributes.h"
#include "intfloat.h"
#if !HAVE_CBRTF
static av_always_inline float cbrtf(float x)
@ -45,6 +46,26 @@ static av_always_inline float cbrtf(float x)
#define exp2f(x) ((float)exp2(x))
#endif /* HAVE_EXP2F */
#if !HAVE_ISINF
static av_always_inline av_const int isinf(float x)
{
uint32_t v = av_float2int(x);
if ((v & 0x7f800000) != 0x7f800000)
return 0;
return !(v & 0x007fffff);
}
#endif /* HAVE_ISINF */
#if !HAVE_ISNAN
static av_always_inline av_const int isnan(float x)
{
uint32_t v = av_float2int(x);
if ((v & 0x7f800000) != 0x7f800000)
return 0;
return v & 0x007fffff;
}
#endif /* HAVE_ISNAN */
#if !HAVE_LLRINT
#undef llrint
#define llrint(x) ((long long)rint(x))