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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/math-emu/double.h
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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 'include/math-emu/double.h')
-rw-r--r--include/math-emu/double.h205
1 files changed, 205 insertions, 0 deletions
diff --git a/include/math-emu/double.h b/include/math-emu/double.h
new file mode 100644
index 00000000000..655ccf1c473
--- /dev/null
+++ b/include/math-emu/double.h
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+/* 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. */
+
+#ifndef __MATH_EMU_DOUBLE_H__
+#define __MATH_EMU_DOUBLE_H__
+
+#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_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(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_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(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 */
+
+
+#endif /* __MATH_EMU_DOUBLE_H__ */