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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/math-emu/ieee754sp.h | |
download | linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/mips/math-emu/ieee754sp.h')
-rw-r--r-- | arch/mips/math-emu/ieee754sp.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/mips/math-emu/ieee754sp.h b/arch/mips/math-emu/ieee754sp.h new file mode 100644 index 00000000000..ae82f51297e --- /dev/null +++ b/arch/mips/math-emu/ieee754sp.h @@ -0,0 +1,89 @@ +/* + * IEEE754 floating point + * double precision internal header file + */ +/* + * MIPS floating point support + * Copyright (C) 1994-2000 Algorithmics Ltd. + * http://www.algor.co.uk + * + * ######################################################################## + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * ######################################################################## + */ + + +#include "ieee754int.h" + +#define assert(expr) ((void)0) + +/* 3bit extended single precision sticky right shift */ +#define SPXSRSXn(rs) \ + (xe += rs, \ + xm = (rs > (SP_MBITS+3))?1:((xm) >> (rs)) | ((xm) << (32-(rs)) != 0)) + +#define SPXSRSX1() \ + (xe++, (xm = (xm >> 1) | (xm & 1))) + +#define SPXSRSYn(rs) \ + (ye+=rs, \ + ym = (rs > (SP_MBITS+3))?1:((ym) >> (rs)) | ((ym) << (32-(rs)) != 0)) + +#define SPXSRSY1() \ + (ye++, (ym = (ym >> 1) | (ym & 1))) + +/* convert denormal to normalized with extended exponent */ +#define SPDNORMx(m,e) \ + while( (m >> SP_MBITS) == 0) { m <<= 1; e--; } +#define SPDNORMX SPDNORMx(xm,xe) +#define SPDNORMY SPDNORMx(ym,ye) + +static __inline ieee754sp buildsp(int s, int bx, unsigned m) +{ + ieee754sp r; + + assert((s) == 0 || (s) == 1); + assert((bx) >= SP_EMIN - 1 + SP_EBIAS + && (bx) <= SP_EMAX + 1 + SP_EBIAS); + assert(((m) >> SP_MBITS) == 0); + + r.parts.sign = s; + r.parts.bexp = bx; + r.parts.mant = m; + + return r; +} + +extern int ieee754sp_isnan(ieee754sp); +extern int ieee754sp_issnan(ieee754sp); +extern int ieee754si_xcpt(int, const char *, ...); +extern s64 ieee754di_xcpt(s64, const char *, ...); +extern ieee754sp ieee754sp_xcpt(ieee754sp, const char *, ...); +extern ieee754sp ieee754sp_nanxcpt(ieee754sp, const char *, ...); +extern ieee754sp ieee754sp_bestnan(ieee754sp, ieee754sp); +extern ieee754sp ieee754sp_format(int, int, unsigned); + + +#define SPNORMRET2(s,e,m,name,a0,a1) \ +{ \ + ieee754sp V = ieee754sp_format(s,e,m); \ + if(TSTX()) \ + return ieee754sp_xcpt(V,name,a0,a1); \ + else \ + return V; \ +} + +#define SPNORMRET1(s,e,m,name,a0) SPNORMRET2(s,e,m,name,a0,a0) |