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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/mips/math-emu/ieee754sp.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/mips/math-emu/ieee754sp.h')
-rw-r--r-- | arch/mips/math-emu/ieee754sp.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/mips/math-emu/ieee754sp.h b/arch/mips/math-emu/ieee754sp.h new file mode 100644 index 0000000000..79040f890f --- /dev/null +++ b/arch/mips/math-emu/ieee754sp.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * IEEE754 floating point + * double precision internal header file + */ +/* + * MIPS floating point support + * Copyright (C) 1994-2000 Algorithmics Ltd. + */ + +#include <linux/compiler.h> + +#include "ieee754int.h" + +#define assert(expr) ((void)0) + +#define SP_EBIAS 127 +#define SP_EMIN (-126) +#define SP_EMAX 127 +#define SP_FBITS 23 +#define SP_MBITS 23 + +#define SP_MBIT(x) ((u32)1 << (x)) +#define SP_HIDDEN_BIT SP_MBIT(SP_FBITS) +#define SP_SIGN_BIT SP_MBIT(31) + +#define SPSIGN(sp) (sp.sign) +#define SPBEXP(sp) (sp.bexp) +#define SPMANT(sp) (sp.mant) + +static inline int ieee754sp_finite(union ieee754sp x) +{ + return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS; +} + +/* 64 bit right shift with rounding */ +#define XSPSRS64(v, rs) \ + (((rs) >= 64) ? ((v) != 0) : ((v) >> (rs)) | ((v) << (64-(rs)) != 0)) + +/* 3bit extended single precision sticky right shift */ +#define XSPSRS(v, rs) \ + ((rs > (SP_FBITS+3))?1:((v) >> (rs)) | ((v) << (32-(rs)) != 0)) + +#define XSPSRS1(m) \ + ((m >> 1) | (m & 1)) + +#define SPXSRSX1() \ + (xe++, (xm = XSPSRS1(xm))) + +#define SPXSRSY1() \ + (ye++, (ym = XSPSRS1(ym))) + +/* convert denormal to normalized with extended exponent */ +#define SPDNORMx(m,e) \ + while ((m >> SP_FBITS) == 0) { m <<= 1; e--; } +#define SPDNORMX SPDNORMx(xm, xe) +#define SPDNORMY SPDNORMx(ym, ye) +#define SPDNORMZ SPDNORMx(zm, ze) + +static inline union ieee754sp buildsp(int s, int bx, unsigned int m) +{ + union ieee754sp r; + + assert((s) == 0 || (s) == 1); + assert((bx) >= SP_EMIN - 1 + SP_EBIAS + && (bx) <= SP_EMAX + 1 + SP_EBIAS); + assert(((m) >> SP_FBITS) == 0); + + r.sign = s; + r.bexp = bx; + r.mant = m; + + return r; +} + +extern union ieee754sp __cold ieee754sp_nanxcpt(union ieee754sp); +extern union ieee754sp ieee754sp_format(int, int, unsigned); |