mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-03 10:21:05 +00:00
fb08891109
* sysdeps/alpha/Implies: Add alpha/soft-fp.
* sysdeps/alpha/soft-fp/sfp-machine.h: Rewrite for GEM interface.
* sysdeps/alpha/Subdirs, sysdeps/alpha/soft-fp/Makefile,
sysdeps/alpha/soft-fp/Versions, sysdeps/alpha/soft-fp/local-soft-fp.h,
sysdeps/alpha/soft-fp/ots_add.c, sysdeps/alpha/soft-fp/ots_cmp.c,
sysdeps/alpha/soft-fp/ots_cmpe.c, sysdeps/alpha/soft-fp/ots_cvtqux.c,
sysdeps/alpha/soft-fp/ots_cvtqx.c, sysdeps/alpha/soft-fp/ots_cvttx.c,
sysdeps/alpha/soft-fp/ots_cvtxq.c, sysdeps/alpha/soft-fp/ots_cvtxt.c,
sysdeps/alpha/soft-fp/ots_div.c, sysdeps/alpha/soft-fp/ots_mul.c,
sysdeps/alpha/soft-fp/ots_nintxq.c, sysdeps/alpha/soft-fp/ots_sub.c:
New files.
95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/* Machine-dependent software floating-point definitions.
|
|
Alpha userland IEEE 128-bit version.
|
|
Copyright (C) 2004 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) and
|
|
David S. Miller (davem@redhat.com).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
#define _FP_W_TYPE_SIZE 64
|
|
#define _FP_W_TYPE unsigned long
|
|
#define _FP_WS_TYPE signed long
|
|
#define _FP_I_TYPE long
|
|
|
|
#define _FP_MUL_MEAT_S(R,X,Y) \
|
|
_FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
|
|
#define _FP_MUL_MEAT_D(R,X,Y) \
|
|
_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
|
|
#define _FP_MUL_MEAT_Q(R,X,Y) \
|
|
_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
|
|
|
|
#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
|
|
#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
|
|
#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
|
|
|
|
#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
|
|
#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1)
|
|
#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
|
|
#define _FP_NANSIGN_S 0
|
|
#define _FP_NANSIGN_D 0
|
|
#define _FP_NANSIGN_Q 0
|
|
|
|
#define _FP_KEEPNANFRACP 1
|
|
|
|
/* Alpha Architecture Handbook, 4.7.10.4 sez that we should prefer any
|
|
type of NaN in Fb, then Fa. */
|
|
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
|
|
do { \
|
|
R##_s = Y##_s; \
|
|
_FP_FRAC_COPY_##wc(R,X); \
|
|
R##_c = FP_CLS_NAN; \
|
|
} while (0)
|
|
|
|
/* Rounding mode settings. */
|
|
#define FP_RND_NEAREST FE_TONEAREST
|
|
#define FP_RND_ZERO FE_TOWARDZERO
|
|
#define FP_RND_PINF FE_UPWARD
|
|
#define FP_RND_MINF FE_DOWNWARD
|
|
|
|
/* Obtain the current rounding mode. It's given as an argument to
|
|
all the Ots functions, with 4 meaning "dynamic". */
|
|
#define FP_ROUNDMODE _round
|
|
|
|
/* Exception flags. */
|
|
#define FP_EX_INVALID FE_INVALID
|
|
#define FP_EX_OVERFLOW FE_OVERFLOW
|
|
#define FP_EX_UNDERFLOW FE_UNDERFLOW
|
|
#define FP_EX_DIVZERO FE_DIVBYZERO
|
|
#define FP_EX_INEXACT FE_INEXACT
|
|
|
|
#define FP_INIT_ROUNDMODE \
|
|
do { \
|
|
if (__builtin_expect (_round == 4, 0)) \
|
|
{ \
|
|
unsigned long t; \
|
|
__asm__ __volatile__("excb; mf_fpcr %0" : "=f"(t)); \
|
|
_round = (t >> FPCR_ROUND_SHIFT) & 3; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define FP_HANDLE_EXCEPTIONS \
|
|
do { \
|
|
if (__builtin_expect (_fex, 0)) \
|
|
{ \
|
|
unsigned long t = __ieee_get_fp_control (); \
|
|
__ieee_set_fp_control (t | _fex); \
|
|
} \
|
|
} while (0)
|