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Diffstat (limited to 'include/math-emu/single.h')
| -rw-r--r-- | include/math-emu/single.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/include/math-emu/single.h b/include/math-emu/single.h new file mode 100644 index 000000000..87f90b0f9 --- /dev/null +++ b/include/math-emu/single.h @@ -0,0 +1,116 @@ +/* Software floating-point emulation. + Definitions for IEEE Single Precision. + Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson (rth@cygnus.com), + Jakub Jelinek (jj@ultra.linux.cz), + David S. Miller (davem@redhat.com) and + Peter Maydell (pmaydell@chiark.greenend.org.uk). + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If + not, write to the Free Software Foundation, Inc., + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifndef __MATH_EMU_SINGLE_H__ +#define __MATH_EMU_SINGLE_H__ + +#if _FP_W_TYPE_SIZE < 32 +#error "Here's a nickel kid. Go buy yourself a real computer." +#endif + +#define _FP_FRACBITS_S 24 +#define _FP_FRACXBITS_S (_FP_W_TYPE_SIZE - _FP_FRACBITS_S) +#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) +#define _FP_WFRACXBITS_S (_FP_W_TYPE_SIZE - _FP_WFRACBITS_S) +#define _FP_EXPBITS_S 8 +#define _FP_EXPBIAS_S 127 +#define _FP_EXPMAX_S 255 +#define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2)) +#define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1)) +#define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S)) + +/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be + chosen by the target machine. */ + +union _FP_UNION_S +{ + float flt; + struct { +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned sign : 1; + unsigned exp : _FP_EXPBITS_S; + unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); +#else + unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); + unsigned exp : _FP_EXPBITS_S; + unsigned sign : 1; +#endif + } bits __attribute__((packed)); +}; + +#define FP_DECL_S(X) _FP_DECL(1,X) +#define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val) +#define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val) +#define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X) +#define FP_PACK_RAW_SP(val,X) \ + do { \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P(S,val,X); \ + } while (0) + +#define FP_UNPACK_S(X,val) \ + do { \ + _FP_UNPACK_RAW_1(S,X,val); \ + _FP_UNPACK_CANONICAL(S,1,X); \ + } while (0) + +#define FP_UNPACK_SP(X,val) \ + do { \ + _FP_UNPACK_RAW_1_P(S,X,val); \ + _FP_UNPACK_CANONICAL(S,1,X); \ + } while (0) + +#define FP_PACK_S(val,X) \ + do { \ + _FP_PACK_CANONICAL(S,1,X); \ + _FP_PACK_RAW_1(S,val,X); \ + } while (0) + +#define FP_PACK_SP(val,X) \ + do { \ + _FP_PACK_CANONICAL(S,1,X); \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P(S,val,X); \ + } while (0) + +#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X) +#define FP_NEG_S(R,X) _FP_NEG(S,1,R,X) +#define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y) +#define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y) +#define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y) +#define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y) +#define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X) +#define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) + +#define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un) +#define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y) + +#define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg) +#define FP_TO_INT_ROUND_S(r,X,rsz,rsg) _FP_TO_INT_ROUND(S,1,r,X,rsz,rsg) +#define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt) + +#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X) +#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X) + +#endif /* __MATH_EMU_SINGLE_H__ */ |