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Diffstat (limited to 'soft-fp/double.h')
| -rw-r--r-- | soft-fp/double.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/soft-fp/double.h b/soft-fp/double.h new file mode 100644 index 0000000000..ee581c2da4 --- /dev/null +++ b/soft-fp/double.h @@ -0,0 +1,197 @@ +/* Software floating-point emulation. + Definitions for IEEE Double 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. */ + +#if _FP_W_TYPE_SIZE < 32 +#error "Here's a nickel kid. Go buy yourself a real computer." +#endif + +#if _FP_W_TYPE_SIZE < 64 +#define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE) +#else +#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE +#endif + +#define _FP_FRACBITS_D 53 +#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D) +#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D) +#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D) +#define _FP_EXPBITS_D 11 +#define _FP_EXPBIAS_D 1023 +#define _FP_EXPMAX_D 2047 + +#define _FP_QNANBIT_D \ + ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE) +#define _FP_IMPLBIT_D \ + ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE) +#define _FP_OVERFLOW_D \ + ((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE) + +#if _FP_W_TYPE_SIZE < 64 + +union _FP_UNION_D +{ + double flt; + struct { +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned sign : 1; + unsigned exp : _FP_EXPBITS_D; + unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; + unsigned frac0 : _FP_W_TYPE_SIZE; +#else + unsigned frac0 : _FP_W_TYPE_SIZE; + unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; + unsigned exp : _FP_EXPBITS_D; + unsigned sign : 1; +#endif + } bits __attribute__((packed)); +}; + +#define FP_DECL_D(X) _FP_DECL(2,X) +#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val) +#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val) +#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X) +#define FP_PACK_RAW_DP(val,X) \ + do { \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_2_P(D,val,X); \ + } while (0) + +#define FP_UNPACK_D(X,val) \ + do { \ + _FP_UNPACK_RAW_2(D,X,val); \ + _FP_UNPACK_CANONICAL(D,2,X); \ + } while (0) + +#define FP_UNPACK_DP(X,val) \ + do { \ + _FP_UNPACK_RAW_2_P(D,X,val); \ + _FP_UNPACK_CANONICAL(D,2,X); \ + } while (0) + +#define FP_PACK_D(val,X) \ + do { \ + _FP_PACK_CANONICAL(D,2,X); \ + _FP_PACK_RAW_2(D,val,X); \ + } while (0) + +#define FP_PACK_DP(val,X) \ + do { \ + _FP_PACK_CANONICAL(D,2,X); \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_2_P(D,val,X); \ + } while (0) + +#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X) +#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X) +#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y) +#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y) +#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y) +#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y) +#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X) +#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q) + +#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un) +#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y) + +#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg) +#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt) + +#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X) +#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X) + +#else + +union _FP_UNION_D +{ + double flt; + struct { +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned sign : 1; + unsigned exp : _FP_EXPBITS_D; + unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); +#else + unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); + unsigned exp : _FP_EXPBITS_D; + unsigned sign : 1; +#endif + } bits __attribute__((packed)); +}; + +#define FP_DECL_D(X) _FP_DECL(1,X) +#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val) +#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val) +#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X) +#define FP_PACK_RAW_DP(val,X) \ + do { \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P(D,val,X); \ + } while (0) + +#define FP_UNPACK_D(X,val) \ + do { \ + _FP_UNPACK_RAW_1(D,X,val); \ + _FP_UNPACK_CANONICAL(D,1,X); \ + } while (0) + +#define FP_UNPACK_DP(X,val) \ + do { \ + _FP_UNPACK_RAW_1_P(D,X,val); \ + _FP_UNPACK_CANONICAL(D,1,X); \ + } while (0) + +#define FP_PACK_D(val,X) \ + do { \ + _FP_PACK_CANONICAL(D,1,X); \ + _FP_PACK_RAW_1(D,val,X); \ + } while (0) + +#define FP_PACK_DP(val,X) \ + do { \ + _FP_PACK_CANONICAL(D,1,X); \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P(D,val,X); \ + } while (0) + +#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X) +#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X) +#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y) +#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y) +#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y) +#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y) +#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X) +#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) + +/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by + the target machine. */ + +#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un) +#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y) + +#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg) +#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt) + +#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X) +#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X) + +#endif /* W_TYPE_SIZE < 64 */ |