Viewing file: 
sfp-machine.h (4.7 KB) -rw-r--r--Select action/file-type:
(
+) |
(
+) |
(
+) |
Code (
+) |
Session (
+) |
(
+) |
SDB (
+) |
(
+) |
(
+) |
(
+) |
(
+) |
(
+) |
/* Machine-dependent software floating-point definitions.
S/390 kernel version.
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 _SFP_MACHINE_H
#define _SFP_MACHINE_H
#define _FP_W_TYPE_SIZE 32
#define _FP_W_TYPE unsigned int
#define _FP_WS_TYPE signed int
#define _FP_I_TYPE int
#define _FP_MUL_MEAT_S(R,X,Y) \
_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_D(R,X,Y) \
_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y) \
_FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv(S,R,X,Y)
#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1
#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
#define _FP_NANSIGN_S 0
#define _FP_NANSIGN_D 0
#define _FP_NANSIGN_Q 0
#define _FP_KEEPNANFRACP 1
/*
* If one NaN is signaling and the other is not,
* we choose that one, otherwise we choose X.
*/
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
do { \
if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs) \
&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)) \
{ \
R##_s = Y##_s; \
_FP_FRAC_COPY_##wc(R,Y); \
} \
else \
{ \
R##_s = X##_s; \
_FP_FRAC_COPY_##wc(R,X); \
} \
R##_c = FP_CLS_NAN; \
} while (0)
/* Some assembly to speed things up. */
#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({ \
unsigned int __r2 = (x2) + (y2); \
unsigned int __r1 = (x1); \
unsigned int __r0 = (x0); \
asm volatile( \
" alr %2,%3\n" \
" brc 12,0f\n" \
" lhi 0,1\n" \
" alr %1,0\n" \
" brc 12,0f\n" \
" alr %0,0\n" \
"0:" \
: "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \
: "d" (y0), "i" (1) : "cc", "0" ); \
asm volatile( \
" alr %1,%2\n" \
" brc 12,0f\n" \
" ahi %0,1\n" \
"0:" \
: "+&d" (__r2), "+&d" (__r1) \
: "d" (y1) : "cc"); \
(r2) = __r2; \
(r1) = __r1; \
(r0) = __r0; \
})
#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({ \
unsigned int __r2 = (x2) - (y2); \
unsigned int __r1 = (x1); \
unsigned int __r0 = (x0); \
asm volatile( \
" slr %2,%3\n" \
" brc 3,0f\n" \
" lhi 0,1\n" \
" slr %1,0\n" \
" brc 3,0f\n" \
" slr %0,0\n" \
"0:" \
: "+&d" (__r2), "+&d" (__r1), "+&d" (__r0) \
: "d" (y0) : "cc", "0"); \
asm volatile( \
" slr %1,%2\n" \
" brc 3,0f\n" \
" ahi %0,-1\n" \
"0:" \
: "+&d" (__r2), "+&d" (__r1) \
: "d" (y1) : "cc"); \
(r2) = __r2; \
(r1) = __r1; \
(r0) = __r0; \
})
#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0)
/* Obtain the current rounding mode. */
#define FP_ROUNDMODE mode
/* Exception flags. */
#define FP_EX_INVALID 0x800000
#define FP_EX_DIVZERO 0x400000
#define FP_EX_OVERFLOW 0x200000
#define FP_EX_UNDERFLOW 0x100000
#define FP_EX_INEXACT 0x080000
/* We write the results always */
#define FP_INHIBIT_RESULTS 0
#endif
