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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * IEEE754 floating point * common internal header file */ /* * MIPS floating point support * Copyright (C) 1994-2000 Algorithmics Ltd. */ #ifndef __IEEE754INT_H #define __IEEE754INT_H #include "ieee754.h" #define CLPAIR(x, y) ((x)*6+(y)) enum maddf_flags { MADDF_NEGATE_PRODUCT = 1 << 0, MADDF_NEGATE_ADDITION = 1 << 1, }; static inline void ieee754_clearcx(void) { ieee754_csr.cx = 0; } static inline void ieee754_setcx(const unsigned int flags) { ieee754_csr.cx |= flags; ieee754_csr.sx |= flags; } static inline int ieee754_setandtestcx(const unsigned int x) { ieee754_setcx(x); return ieee754_csr.mx & x; } static inline int ieee754_class_nan(int xc) { return xc >= IEEE754_CLASS_SNAN; } #define COMPXSP \ unsigned int xm; int xe; int xs __maybe_unused; int xc #define COMPYSP \ unsigned int ym; int ye; int ys; int yc #define COMPZSP \ unsigned int zm; int ze; int zs; int zc #define EXPLODESP(v, vc, vs, ve, vm) \ { \ vs = SPSIGN(v); \ ve = SPBEXP(v); \ vm = SPMANT(v); \ if (ve == SP_EMAX+1+SP_EBIAS) { \ if (vm == 0) \ vc = IEEE754_CLASS_INF; \ else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \ vc = IEEE754_CLASS_QNAN; \ else \ vc = IEEE754_CLASS_SNAN; \ } else if (ve == SP_EMIN-1+SP_EBIAS) { \ if (vm) { \ ve = SP_EMIN; \ vc = IEEE754_CLASS_DNORM; \ } else \ vc = IEEE754_CLASS_ZERO; \ } else { \ ve -= SP_EBIAS; \ vm |= SP_HIDDEN_BIT; \ vc = IEEE754_CLASS_NORM; \ } \ } #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm) #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym) #define EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm) #define COMPXDP \ u64 xm; int xe; int xs __maybe_unused; int xc #define COMPYDP \ u64 ym; int ye; int ys; int yc #define COMPZDP \ u64 zm; int ze; int zs; int zc #define EXPLODEDP(v, vc, vs, ve, vm) \ { \ vm = DPMANT(v); \ vs = DPSIGN(v); \ ve = DPBEXP(v); \ if (ve == DP_EMAX+1+DP_EBIAS) { \ if (vm == 0) \ vc = IEEE754_CLASS_INF; \ else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \ vc = IEEE754_CLASS_QNAN; \ else \ vc = IEEE754_CLASS_SNAN; \ } else if (ve == DP_EMIN-1+DP_EBIAS) { \ if (vm) { \ ve = DP_EMIN; \ vc = IEEE754_CLASS_DNORM; \ } else \ vc = IEEE754_CLASS_ZERO; \ } else { \ ve -= DP_EBIAS; \ vm |= DP_HIDDEN_BIT; \ vc = IEEE754_CLASS_NORM; \ } \ } #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm) #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym) #define EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm) #define FLUSHDP(v, vc, vs, ve, vm) \ if (vc==IEEE754_CLASS_DNORM) { \ if (ieee754_csr.nod) { \ ieee754_setcx(IEEE754_INEXACT); \ vc = IEEE754_CLASS_ZERO; \ ve = DP_EMIN-1+DP_EBIAS; \ vm = 0; \ v = ieee754dp_zero(vs); \ } \ } #define FLUSHSP(v, vc, vs, ve, vm) \ if (vc==IEEE754_CLASS_DNORM) { \ if (ieee754_csr.nod) { \ ieee754_setcx(IEEE754_INEXACT); \ vc = IEEE754_CLASS_ZERO; \ ve = SP_EMIN-1+SP_EBIAS; \ vm = 0; \ v = ieee754sp_zero(vs); \ } \ } #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm) #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym) #define FLUSHZDP FLUSHDP(z, zc, zs, ze, zm) #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) #define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm) #endif /* __IEEE754INT_H */ |