105 строки
2.5 KiB
C
105 строки
2.5 KiB
C
#ifndef SOFT_FP_H
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#define SOFT_FP_H
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#include "sfp-machine.h"
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#define _FP_WORKBITS 3
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#define _FP_WORK_LSB ((_FP_W_TYPE)1 << 3)
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#define _FP_WORK_ROUND ((_FP_W_TYPE)1 << 2)
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#define _FP_WORK_GUARD ((_FP_W_TYPE)1 << 1)
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#define _FP_WORK_STICKY ((_FP_W_TYPE)1 << 0)
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#ifndef FP_RND_NEAREST
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# define FP_RND_NEAREST 0
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# define FP_RND_ZERO 1
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# define FP_RND_PINF 2
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# define FP_RND_MINF 3
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#ifndef FP_ROUNDMODE
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# define FP_ROUNDMODE FP_RND_NEAREST
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#endif
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#endif
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#define _FP_ROUND_NEAREST(wc, X) \
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({ int __ret = 0; \
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int __frac = _FP_FRAC_LOW_##wc(X) & 15; \
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if (__frac & 7) { \
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__ret = EFLAG_INEXACT; \
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if ((__frac & 7) != _FP_WORK_ROUND) \
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_FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND); \
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else if (__frac & _FP_WORK_LSB) \
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_FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND); \
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} \
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__ret; \
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})
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#define _FP_ROUND_ZERO(wc, X) \
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({ int __ret = 0; \
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if (_FP_FRAC_LOW_##wc(X) & 7) \
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__ret = EFLAG_INEXACT; \
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__ret; \
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})
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#define _FP_ROUND_PINF(wc, X) \
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({ int __ret = EFLAG_INEXACT; \
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if (!X##_s && (_FP_FRAC_LOW_##wc(X) & 7)) \
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_FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB); \
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else __ret = 0; \
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__ret; \
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})
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#define _FP_ROUND_MINF(wc, X) \
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({ int __ret = EFLAG_INEXACT; \
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if (X##_s && (_FP_FRAC_LOW_##wc(X) & 7)) \
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_FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB); \
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else __ret = 0; \
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__ret; \
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})
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#define _FP_ROUND(wc, X) \
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({ int __ret = 0; \
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switch (FP_ROUNDMODE) \
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{ \
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case FP_RND_NEAREST: \
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__ret |= _FP_ROUND_NEAREST(wc,X); \
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break; \
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case FP_RND_ZERO: \
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__ret |= _FP_ROUND_ZERO(wc,X); \
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break; \
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case FP_RND_PINF: \
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__ret |= _FP_ROUND_PINF(wc,X); \
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break; \
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case FP_RND_MINF: \
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__ret |= _FP_ROUND_MINF(wc,X); \
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break; \
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}; \
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__ret; \
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})
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#define FP_CLS_NORMAL 0
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#define FP_CLS_ZERO 1
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#define FP_CLS_INF 2
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#define FP_CLS_NAN 3
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#define _FP_CLS_COMBINE(x,y) (((x) << 2) | (y))
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#include "op-1.h"
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#include "op-2.h"
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#include "op-4.h"
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#include "op-common.h"
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/* Sigh. Silly things longlong.h needs. */
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#define UWtype _FP_W_TYPE
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#define W_TYPE_SIZE _FP_W_TYPE_SIZE
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typedef int SItype __attribute__((mode(SI)));
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typedef int DItype __attribute__((mode(DI)));
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typedef unsigned int USItype __attribute__((mode(SI)));
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typedef unsigned int UDItype __attribute__((mode(DI)));
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#if _FP_W_TYPE_SIZE == 32
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typedef unsigned int UHWtype __attribute__((mode(HI)));
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#elif _FP_W_TYPE_SIZE == 64
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typedef USItype UHWtype;
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#endif
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#endif
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