86 lines
2.2 KiB
ArmAsm
86 lines
2.2 KiB
ArmAsm
|
/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
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, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include "div_libc.h"
|
||
|
|
|
||
|
|
/* 32-bit signed int remainder. This is not a normal C function. Argument
|
||
|
|
registers are t10 and t11, the result goes in t12. Only t12 and AT may
|
||
|
|
be clobbered.
|
||
|
|
|
||
|
|
The FPU can handle the division for all input values except zero.
|
||
|
|
All we have to do is compute the remainder via multiply-and-subtract.
|
||
|
|
|
||
|
|
The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
|
||
|
|
for cvttq/c even without /sui being set. It will not, however, properly
|
||
|
|
raise the exception, so we don't have to worry about FPCR_INED being clear
|
||
|
|
and so dying by SIGFPE. */
|
||
|
|
|
||
|
|
#ifndef EXTEND
|
||
|
|
#define EXTEND(S,D) sextl S, D
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.text
|
||
|
|
.align 4
|
||
|
|
.globl __reml
|
||
|
|
.type __reml, @funcnoplt
|
||
|
|
.usepv __reml, no
|
||
|
|
|
||
|
|
cfi_startproc
|
||
|
|
cfi_return_column (RA)
|
||
|
|
__reml:
|
||
|
|
lda sp, -FRAME(sp)
|
||
|
|
cfi_def_cfa_offset (FRAME)
|
||
|
|
CALL_MCOUNT
|
||
|
|
stt $f0, 0(sp)
|
||
|
|
excb
|
||
|
|
beq Y, DIVBYZERO
|
||
|
|
|
||
|
|
stt $f1, 8(sp)
|
||
|
|
stt $f2, 16(sp)
|
||
|
|
cfi_rel_offset ($f0, 0)
|
||
|
|
cfi_rel_offset ($f1, 8)
|
||
|
|
cfi_rel_offset ($f2, 16)
|
||
|
|
mf_fpcr $f2
|
||
|
|
|
||
|
|
EXTEND (X, RV)
|
||
|
|
EXTEND (Y, AT)
|
||
|
|
_ITOFT2 RV, $f0, 24, AT, $f1, 32
|
||
|
|
cvtqt $f0, $f0
|
||
|
|
cvtqt $f1, $f1
|
||
|
|
divt/c $f0, $f1, $f0
|
||
|
|
cvttq/c $f0, $f0
|
||
|
|
excb
|
||
|
|
mt_fpcr $f2
|
||
|
|
_FTOIT $f0, RV, 24
|
||
|
|
|
||
|
|
ldt $f0, 0(sp)
|
||
|
|
mull RV, Y, RV
|
||
|
|
ldt $f1, 8(sp)
|
||
|
|
ldt $f2, 16(sp)
|
||
|
|
lda sp, FRAME(sp)
|
||
|
|
cfi_restore ($f0)
|
||
|
|
cfi_restore ($f1)
|
||
|
|
cfi_restore ($f2)
|
||
|
|
cfi_def_cfa_offset (0)
|
||
|
|
subl X, RV, RV
|
||
|
|
ret $31, (RA), 1
|
||
|
|
|
||
|
|
cfi_endproc
|
||
|
|
.size __reml, .-__reml
|
||
|
|
|
||
|
|
DO_DIVBYZERO
|