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77 lines
1.7 KiB
77 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 SP_EBIAS 127 |
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#define SP_EMIN (-126) |
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#define SP_EMAX 127 |
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#define SP_FBITS 23 |
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#define SP_MBITS 23 |
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#define SP_MBIT(x) ((u32)1 << (x)) |
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#define SP_HIDDEN_BIT SP_MBIT(SP_FBITS) |
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#define SP_SIGN_BIT SP_MBIT(31) |
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#define SPSIGN(sp) (sp.sign) |
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#define SPBEXP(sp) (sp.bexp) |
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#define SPMANT(sp) (sp.mant) |
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static inline int ieee754sp_finite(union ieee754sp x) |
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{ |
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return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS; |
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} |
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/* 64 bit right shift with rounding */ |
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#define XSPSRS64(v, rs) \ |
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(((rs) >= 64) ? ((v) != 0) : ((v) >> (rs)) | ((v) << (64-(rs)) != 0)) |
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/* 3bit extended single precision sticky right shift */ |
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#define XSPSRS(v, rs) \ |
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((rs > (SP_FBITS+3))?1:((v) >> (rs)) | ((v) << (32-(rs)) != 0)) |
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#define XSPSRS1(m) \ |
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((m >> 1) | (m & 1)) |
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#define SPXSRSX1() \ |
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(xe++, (xm = XSPSRS1(xm))) |
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#define SPXSRSY1() \ |
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(ye++, (ym = XSPSRS1(ym))) |
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/* convert denormal to normalized with extended exponent */ |
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#define SPDNORMx(m,e) \ |
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while ((m >> SP_FBITS) == 0) { m <<= 1; e--; } |
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#define SPDNORMX SPDNORMx(xm, xe) |
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#define SPDNORMY SPDNORMx(ym, ye) |
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#define SPDNORMZ SPDNORMx(zm, ze) |
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static inline union ieee754sp buildsp(int s, int bx, unsigned int m) |
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{ |
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union ieee754sp r; |
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assert((s) == 0 || (s) == 1); |
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assert((bx) >= SP_EMIN - 1 + SP_EBIAS |
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&& (bx) <= SP_EMAX + 1 + SP_EBIAS); |
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assert(((m) >> SP_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 ieee754sp __cold ieee754sp_nanxcpt(union ieee754sp); |
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extern union ieee754sp ieee754sp_format(int, int, unsigned);
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