69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* SoX Resampler Library Copyright (c) 2007-12 robs@users.sourceforge.net
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* Licence for this file: LGPL v2.1 See LICENCE for details. */
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#if !defined soxr_rint_included
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#define soxr_rint_included
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#include "soxr-config.h"
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#if HAVE_LRINT && LONG_MAX == 2147483647L
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#include <math.h>
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#define FPU_RINT32
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#define rint32 lrint
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#elif defined __GNUC__ && (defined __i386__ || defined __x86_64__)
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#define FPU_RINT32
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static __inline int32_t rint32(double input) {
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int32_t result;
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__asm__ __volatile__("fistpl %0": "=m"(result): "t"(input): "st");
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return result;
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}
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#elif defined __GNUC__ && defined __arm__
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#define FPU_RINT32
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static __inline int32_t rint32(double input) {
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register int32_t result;
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__asm__ __volatile__ ("ftosid %0, %P1": "=w"(result): "w"(input));
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return result;
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}
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#elif defined _MSC_VER && defined _M_IX86
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#define FPU_RINT32
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static __inline int32_t rint32(double input) {
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int32_t result;
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_asm {
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fld input
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fistp result
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}
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return result;
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}
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#else
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#define rint32(x) (int32_t)((x) < 0? x - .5 : x + .5)
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#endif
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#if defined __GNUC__ && (defined __i386__ || defined __x86_64__)
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#define FPU_RINT16
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static __inline int16_t rint16(double input) {
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int16_t result;
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__asm__ __volatile__("fistps %0": "=m"(result): "t"(input): "st");
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return result;
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}
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#elif defined _MSC_VER && defined _M_IX86
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#define FPU_RINT16
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static __inline int16_t rint16(double input) {
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int16_t result;
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_asm {
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fld input
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fistp result
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}
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return result;
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}
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#else
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#define rint16(x) (int16_t)floor((x)+.5) /* Is this faster than in rint32? */
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#endif
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#endif
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