diff options
Diffstat (limited to 'libavutil/libm.h')
| -rw-r--r-- | libavutil/libm.h | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/libavutil/libm.h b/libavutil/libm.h index 6c17b287b4..221c2867c5 100644 --- a/libavutil/libm.h +++ b/libavutil/libm.h @@ -83,23 +83,53 @@ static av_always_inline float cbrtf(float x) #endif /* HAVE_EXP2F */ #if !HAVE_ISINF -static av_always_inline av_const int isinf(float x) +#undef isinf +/* Note: these do not follow the BSD/Apple/GNU convention of returning -1 for +-Inf, +1 for Inf, 0 otherwise, but merely follow the POSIX/ISO mandated spec of +returning a non-zero value for +/-Inf, 0 otherwise. */ +static av_always_inline av_const int avpriv_isinff(float x) { uint32_t v = av_float2int(x); if ((v & 0x7f800000) != 0x7f800000) return 0; return !(v & 0x007fffff); } + +static av_always_inline av_const int avpriv_isinf(double x) +{ + uint64_t v = av_double2int(x); + if ((v & 0x7ff0000000000000) != 0x7ff0000000000000) + return 0; + return !(v & 0x000fffffffffffff); +} + +#define isinf(x) \ + (sizeof(x) == sizeof(float) \ + ? avpriv_isinff(x) \ + : avpriv_isinf(x)) #endif /* HAVE_ISINF */ #if !HAVE_ISNAN -static av_always_inline av_const int isnan(float x) +static av_always_inline av_const int avpriv_isnanf(float x) { uint32_t v = av_float2int(x); if ((v & 0x7f800000) != 0x7f800000) return 0; return v & 0x007fffff; } + +static av_always_inline av_const int avpriv_isnan(double x) +{ + uint64_t v = av_double2int(x); + if ((v & 0x7ff0000000000000) != 0x7ff0000000000000) + return 0; + return v & 0x000fffffffffffff; +} + +#define isnan(x) \ + (sizeof(x) == sizeof(float) \ + ? avpriv_isnanf(x) \ + : avpriv_isnan(x)) #endif /* HAVE_ISNAN */ #if !HAVE_LDEXPF |