diff options
Diffstat (limited to 'src/include/utils/float.h')
| -rw-r--r-- | src/include/utils/float.h | 49 |
1 files changed, 7 insertions, 42 deletions
diff --git a/src/include/utils/float.h b/src/include/utils/float.h index 0e2e9ec5347..fa903b4bf59 100644 --- a/src/include/utils/float.h +++ b/src/include/utils/float.h @@ -51,62 +51,27 @@ extern char *float8out_internal(float8 num); extern int float4_cmp_internal(float4 a, float4 b); extern int float8_cmp_internal(float8 a, float8 b); -/* - * Routines to provide reasonably platform-independent handling of - * infinity and NaN - * - * We assume that isinf() and isnan() are available and work per spec. - * (On some platforms, we have to supply our own; see src/port.) However, - * generating an Infinity or NaN in the first place is less well standardized; - * pre-C99 systems tend not to have C99's INFINITY and NaN macros. We - * centralize our workarounds for this here. - */ - -/* - * The funny placements of the two #pragmas is necessary because of a - * long lived bug in the Microsoft compilers. - * See http://support.microsoft.com/kb/120968/en-us for details - */ -#ifdef _MSC_VER -#pragma warning(disable:4756) -#endif static inline float4 get_float4_infinity(void) { -#ifdef INFINITY /* C99 standard way */ return (float4) INFINITY; -#else -#ifdef _MSC_VER -#pragma warning(default:4756) -#endif - - /* - * On some platforms, HUGE_VAL is an infinity, elsewhere it's just the - * largest normal float8. We assume forcing an overflow will get us a - * true infinity. - */ - return (float4) (HUGE_VAL * HUGE_VAL); -#endif } static inline float8 get_float8_infinity(void) { -#ifdef INFINITY /* C99 standard way */ return (float8) INFINITY; -#else - - /* - * On some platforms, HUGE_VAL is an infinity, elsewhere it's just the - * largest normal float8. We assume forcing an overflow will get us a - * true infinity. - */ - return (float8) (HUGE_VAL * HUGE_VAL); -#endif } +/* + * Routines to provide reasonably platform-independent handling of NaN + * + * We assume that isnan() is available and work per spec. However, generating + * a NaN in the first place is less well standardized; pre-C99 systems tend + * not to have C99's NaN macro. We centralize our workaround for this here. + */ static inline float4 get_float4_nan(void) { |