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73 lines
1.7 KiB
73 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* IEEE754 floating point |
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* double precision internal header file |
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*/ |
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/* |
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* MIPS floating point support |
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* Copyright (C) 1994-2000 Algorithmics Ltd. |
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*/ |
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#include <linux/compiler.h> |
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#include "ieee754int.h" |
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#define assert(expr) ((void)0) |
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#define DP_EBIAS 1023 |
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#define DP_EMIN (-1022) |
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#define DP_EMAX 1023 |
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#define DP_FBITS 52 |
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#define DP_MBITS 52 |
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#define DP_MBIT(x) ((u64)1 << (x)) |
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#define DP_HIDDEN_BIT DP_MBIT(DP_FBITS) |
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#define DP_SIGN_BIT DP_MBIT(63) |
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#define DPSIGN(dp) (dp.sign) |
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#define DPBEXP(dp) (dp.bexp) |
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#define DPMANT(dp) (dp.mant) |
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static inline int ieee754dp_finite(union ieee754dp x) |
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{ |
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return DPBEXP(x) != DP_EMAX + 1 + DP_EBIAS; |
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} |
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/* 3bit extended double precision sticky right shift */ |
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#define XDPSRS(v,rs) \ |
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((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0)) |
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#define XDPSRSX1() \ |
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(xe++, (xm = (xm >> 1) | (xm & 1))) |
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#define XDPSRS1(v) \ |
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(((v) >> 1) | ((v) & 1)) |
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/* 32bit * 32bit => 64bit unsigned integer multiplication */ |
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#define DPXMULT(x, y) ((u64)(x) * (u64)y) |
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/* convert denormal to normalized with extended exponent */ |
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#define DPDNORMx(m,e) \ |
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while ((m >> DP_FBITS) == 0) { m <<= 1; e--; } |
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#define DPDNORMX DPDNORMx(xm, xe) |
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#define DPDNORMY DPDNORMx(ym, ye) |
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#define DPDNORMZ DPDNORMx(zm, ze) |
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static inline union ieee754dp builddp(int s, int bx, u64 m) |
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{ |
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union ieee754dp r; |
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assert((s) == 0 || (s) == 1); |
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assert((bx) >= DP_EMIN - 1 + DP_EBIAS |
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&& (bx) <= DP_EMAX + 1 + DP_EBIAS); |
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assert(((m) >> DP_FBITS) == 0); |
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r.sign = s; |
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r.bexp = bx; |
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r.mant = m; |
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return r; |
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} |
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extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp); |
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extern union ieee754dp ieee754dp_format(int, int, u64);
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