mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 05:11:32 +00:00
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/* More subroutines needed by GCC output code on some machines. */
|
|
/* Compile this one with gcc. */
|
|
/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU CC 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* As a special exception, if you link this library with other files,
|
|
some of which are compiled with GCC, to produce an executable,
|
|
this library does not by itself cause the resulting executable
|
|
to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why
|
|
the executable file might be covered by the GNU General Public License.
|
|
*/
|
|
/* support functions required by the kernel. based on code from gcc-2.95.3 */
|
|
/* I Molton 29/07/01 */
|
|
|
|
#include "gcclib.h"
|
|
|
|
#define umul_ppmm(xh, xl, a, b) \
|
|
{register u32 __t0, __t1, __t2; \
|
|
__asm__ ("%@ Inlined umul_ppmm \n\
|
|
mov %2, %5, lsr #16 \n\
|
|
mov %0, %6, lsr #16 \n\
|
|
bic %3, %5, %2, lsl #16 \n\
|
|
bic %4, %6, %0, lsl #16 \n\
|
|
mul %1, %3, %4 \n\
|
|
mul %4, %2, %4 \n\
|
|
mul %3, %0, %3 \n\
|
|
mul %0, %2, %0 \n\
|
|
adds %3, %4, %3 \n\
|
|
addcs %0, %0, #65536 \n\
|
|
adds %1, %1, %3, lsl #16 \n\
|
|
adc %0, %0, %3, lsr #16" \
|
|
: "=&r" ((u32) (xh)), \
|
|
"=r" ((u32) (xl)), \
|
|
"=&r" (__t0), "=&r" (__t1), "=r" (__t2) \
|
|
: "r" ((u32) (a)), \
|
|
"r" ((u32) (b)));}
|
|
|
|
#define __umulsidi3(u, v) \
|
|
({DIunion __w; \
|
|
umul_ppmm (__w.s.high, __w.s.low, u, v); \
|
|
__w.ll; })
|
|
|
|
s64 __muldi3(s64 u, s64 v)
|
|
{
|
|
DIunion w;
|
|
DIunion uu, vv;
|
|
|
|
uu.ll = u, vv.ll = v;
|
|
|
|
w.ll = __umulsidi3(uu.s.low, vv.s.low);
|
|
w.s.high += ((u32) uu.s.low * (u32) vv.s.high
|
|
+ (u32) uu.s.high * (u32) vv.s.low);
|
|
|
|
return w.ll;
|
|
}
|