mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
8a88367088
The bogomips calculation triggered via reading from /proc/cpuinfo can return incorrect values if the qrnnd assembly is called with a pointer in %r2 with any of the upper 32 bits set. Fix this by using 64 bit division / remainder operation provided by gcc instead of calling the assembly. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
/* 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
|