; libgcc routines for ARC cpu.
|
; libgcc routines for ARC cpu.
|
|
|
/* Copyright (C) 1995, 1997,2004, 2009 Free Software Foundation, Inc.
|
/* Copyright (C) 1995, 1997,2004, 2009 Free Software Foundation, Inc.
|
|
|
This file is free software; you can redistribute it and/or modify it
|
This file is free software; you can redistribute it and/or modify it
|
under the terms of the GNU General Public License as published by the
|
under the terms of the GNU General Public License as published by the
|
Free Software Foundation; either version 3, or (at your option) any
|
Free Software Foundation; either version 3, or (at your option) any
|
later version.
|
later version.
|
|
|
This file is distributed in the hope that it will be useful, but
|
This file is distributed in the hope that it will be useful, but
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
General Public License for more details.
|
General Public License for more details.
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
Under Section 7 of GPL version 3, you are granted additional
|
permissions described in the GCC Runtime Library Exception, version
|
permissions described in the GCC Runtime Library Exception, version
|
3.1, as published by the Free Software Foundation.
|
3.1, as published by the Free Software Foundation.
|
|
|
You should have received a copy of the GNU General Public License and
|
You should have received a copy of the GNU General Public License and
|
a copy of the GCC Runtime Library Exception along with this program;
|
a copy of the GCC Runtime Library Exception along with this program;
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
. */
|
. */
|
|
|
#ifdef L_mulsi3
|
#ifdef L_mulsi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___mulsi3
|
.global ___mulsi3
|
___mulsi3:
|
___mulsi3:
|
|
|
/* This the simple version.
|
/* This the simple version.
|
|
|
while (a)
|
while (a)
|
{
|
{
|
if (a & 1)
|
if (a & 1)
|
r += b;
|
r += b;
|
a >>= 1;
|
a >>= 1;
|
b <<= 1;
|
b <<= 1;
|
}
|
}
|
*/
|
*/
|
mov r2,0 ; Accumulate result here.
|
mov r2,0 ; Accumulate result here.
|
.Lloop:
|
.Lloop:
|
sub.f 0,r0,0 ; while (a)
|
sub.f 0,r0,0 ; while (a)
|
nop
|
nop
|
beq.nd .Ldone
|
beq.nd .Ldone
|
and.f 0,r0,1 ; if (a & 1)
|
and.f 0,r0,1 ; if (a & 1)
|
add.nz r2,r2,r1 ; r += b
|
add.nz r2,r2,r1 ; r += b
|
lsr r0,r0 ; a >>= 1
|
lsr r0,r0 ; a >>= 1
|
b.d .Lloop
|
b.d .Lloop
|
lsl r1,r1 ; b <<= 1
|
lsl r1,r1 ; b <<= 1
|
.Ldone:
|
.Ldone:
|
j.d blink
|
j.d blink
|
mov r0,r2
|
mov r0,r2
|
#endif
|
#endif
|
|
|
#endif /* L_mulsi3 */
|
#endif /* L_mulsi3 */
|
|
|
#ifdef L_umulsidi3
|
#ifdef L_umulsidi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___umulsidi3
|
.global ___umulsidi3
|
___umulsidi3:
|
___umulsidi3:
|
|
|
/* This the simple version.
|
/* This the simple version.
|
|
|
while (a)
|
while (a)
|
{
|
{
|
if (a & 1)
|
if (a & 1)
|
r += b;
|
r += b;
|
a >>= 1;
|
a >>= 1;
|
b <<= 1;
|
b <<= 1;
|
}
|
}
|
*/
|
*/
|
mov r2,0 ; Top part of b.
|
mov r2,0 ; Top part of b.
|
mov r3,0 ; Accumulate result here.
|
mov r3,0 ; Accumulate result here.
|
mov r4,0
|
mov r4,0
|
.Lloop:
|
.Lloop:
|
sub.f 0,r0,0 ; while (a)
|
sub.f 0,r0,0 ; while (a)
|
nop
|
nop
|
beq.nd .Ldone
|
beq.nd .Ldone
|
and.f 0,r0,1 ; if (a & 1)
|
and.f 0,r0,1 ; if (a & 1)
|
sub.f 0,r0,0
|
sub.f 0,r0,0
|
nop
|
nop
|
beq .Ldontadd
|
beq .Ldontadd
|
add.f r4,r4,r1 ; r += b
|
add.f r4,r4,r1 ; r += b
|
adc r3,r3,r2
|
adc r3,r3,r2
|
.Ldontadd:
|
.Ldontadd:
|
lsr r0,r0 ; a >>= 1
|
lsr r0,r0 ; a >>= 1
|
lsl.f r1,r1 ; b <<= 1
|
lsl.f r1,r1 ; b <<= 1
|
b.d .Lloop
|
b.d .Lloop
|
rlc r2,r2
|
rlc r2,r2
|
.Ldone:
|
.Ldone:
|
#ifdef __big_endian__
|
#ifdef __big_endian__
|
mov r1,r4
|
mov r1,r4
|
j.d blink
|
j.d blink
|
mov r0,r3
|
mov r0,r3
|
#else
|
#else
|
mov r0,r4
|
mov r0,r4
|
j.d blink
|
j.d blink
|
mov r1,r3
|
mov r1,r3
|
#endif
|
#endif
|
#endif
|
#endif
|
|
|
#endif /* L_umulsidi3 */
|
#endif /* L_umulsidi3 */
|
|
|
#ifdef L_divmod_tools
|
#ifdef L_divmod_tools
|
|
|
; Utilities used by all routines.
|
; Utilities used by all routines.
|
|
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
; inputs: r0 = numerator, r1 = denominator
|
; inputs: r0 = numerator, r1 = denominator
|
; outputs: positive r0/r1,
|
; outputs: positive r0/r1,
|
; r6.bit1 = sign of numerator, r6.bit0 = sign of result
|
; r6.bit1 = sign of numerator, r6.bit0 = sign of result
|
|
|
.global ___divnorm
|
.global ___divnorm
|
___divnorm:
|
___divnorm:
|
mov r6,0 ; keep sign in r6
|
mov r6,0 ; keep sign in r6
|
sub.f 0,r0,0 ; is numerator -ve?
|
sub.f 0,r0,0 ; is numerator -ve?
|
sub.lt r0,0,r0 ; negate numerator
|
sub.lt r0,0,r0 ; negate numerator
|
mov.lt r6,3 ; sign is -ve
|
mov.lt r6,3 ; sign is -ve
|
sub.f 0,r1,0 ; is denominator -ve?
|
sub.f 0,r1,0 ; is denominator -ve?
|
sub.lt r1,0,r1 ; negate denominator
|
sub.lt r1,0,r1 ; negate denominator
|
xor.lt r6,r6,1 ; toggle sign
|
xor.lt r6,r6,1 ; toggle sign
|
j.nd blink
|
j.nd blink
|
|
|
/*
|
/*
|
unsigned long
|
unsigned long
|
udivmodsi4(int modwanted, unsigned long num, unsigned long den)
|
udivmodsi4(int modwanted, unsigned long num, unsigned long den)
|
{
|
{
|
unsigned long bit = 1;
|
unsigned long bit = 1;
|
unsigned long res = 0;
|
unsigned long res = 0;
|
|
|
while (den < num && bit && !(den & (1L<<31)))
|
while (den < num && bit && !(den & (1L<<31)))
|
{
|
{
|
den <<=1;
|
den <<=1;
|
bit <<=1;
|
bit <<=1;
|
}
|
}
|
while (bit)
|
while (bit)
|
{
|
{
|
if (num >= den)
|
if (num >= den)
|
{
|
{
|
num -= den;
|
num -= den;
|
res |= bit;
|
res |= bit;
|
}
|
}
|
bit >>=1;
|
bit >>=1;
|
den >>=1;
|
den >>=1;
|
}
|
}
|
if (modwanted) return num;
|
if (modwanted) return num;
|
return res;
|
return res;
|
}
|
}
|
*/
|
*/
|
|
|
; inputs: r0 = numerator, r1 = denominator
|
; inputs: r0 = numerator, r1 = denominator
|
; outputs: r0 = quotient, r1 = remainder, r2/r3 trashed
|
; outputs: r0 = quotient, r1 = remainder, r2/r3 trashed
|
|
|
.global ___udivmodsi4
|
.global ___udivmodsi4
|
___udivmodsi4:
|
___udivmodsi4:
|
mov r2,1 ; bit = 1
|
mov r2,1 ; bit = 1
|
mov r3,0 ; res = 0
|
mov r3,0 ; res = 0
|
.Lloop1:
|
.Lloop1:
|
sub.f 0,r1,r0 ; while (den < num
|
sub.f 0,r1,r0 ; while (den < num
|
nop
|
nop
|
bnc.nd .Lloop2
|
bnc.nd .Lloop2
|
sub.f 0,r2,0 ; && bit
|
sub.f 0,r2,0 ; && bit
|
nop
|
nop
|
bz.nd .Lloop2
|
bz.nd .Lloop2
|
lsl.f 0,r1 ; && !(den & (1<<31))
|
lsl.f 0,r1 ; && !(den & (1<<31))
|
nop
|
nop
|
bc.nd .Lloop2
|
bc.nd .Lloop2
|
lsl r1,r1 ; den <<= 1
|
lsl r1,r1 ; den <<= 1
|
b.d .Lloop1
|
b.d .Lloop1
|
lsl r2,r2 ; bit <<= 1
|
lsl r2,r2 ; bit <<= 1
|
.Lloop2:
|
.Lloop2:
|
sub.f 0,r2,0 ; while (bit)
|
sub.f 0,r2,0 ; while (bit)
|
nop
|
nop
|
bz.nd .Ldivmodend
|
bz.nd .Ldivmodend
|
sub.f 0,r0,r1 ; if (num >= den)
|
sub.f 0,r0,r1 ; if (num >= den)
|
nop
|
nop
|
bc.nd .Lshiftdown
|
bc.nd .Lshiftdown
|
sub r0,r0,r1 ; num -= den
|
sub r0,r0,r1 ; num -= den
|
or r3,r3,r2 ; res |= bit
|
or r3,r3,r2 ; res |= bit
|
.Lshiftdown:
|
.Lshiftdown:
|
lsr r2,r2 ; bit >>= 1
|
lsr r2,r2 ; bit >>= 1
|
b.d .Lloop2
|
b.d .Lloop2
|
lsr r1,r1 ; den >>= 1
|
lsr r1,r1 ; den >>= 1
|
.Ldivmodend:
|
.Ldivmodend:
|
mov r1,r0 ; r1 = mod
|
mov r1,r0 ; r1 = mod
|
j.d blink
|
j.d blink
|
mov r0,r3 ; r0 = res
|
mov r0,r3 ; r0 = res
|
|
|
#endif
|
#endif
|
|
|
#ifdef L_udivsi3
|
#ifdef L_udivsi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___udivsi3
|
.global ___udivsi3
|
___udivsi3:
|
___udivsi3:
|
mov r7,blink
|
mov r7,blink
|
bl.nd ___udivmodsi4
|
bl.nd ___udivmodsi4
|
j.nd r7
|
j.nd r7
|
#endif
|
#endif
|
|
|
#endif /* L_udivsi3 */
|
#endif /* L_udivsi3 */
|
|
|
#ifdef L_divsi3
|
#ifdef L_divsi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___divsi3
|
.global ___divsi3
|
___divsi3:
|
___divsi3:
|
mov r7,blink
|
mov r7,blink
|
bl.nd ___divnorm
|
bl.nd ___divnorm
|
bl.nd ___udivmodsi4
|
bl.nd ___udivmodsi4
|
and.f 0,r6,1
|
and.f 0,r6,1
|
sub.nz r0,0,r0 ; cannot go in delay slot, has limm value
|
sub.nz r0,0,r0 ; cannot go in delay slot, has limm value
|
j.nd r7
|
j.nd r7
|
#endif
|
#endif
|
|
|
#endif /* L_divsi3 */
|
#endif /* L_divsi3 */
|
|
|
#ifdef L_umodsi3
|
#ifdef L_umodsi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___umodsi3
|
.global ___umodsi3
|
___umodsi3:
|
___umodsi3:
|
mov r7,blink
|
mov r7,blink
|
bl.nd ___udivmodsi4
|
bl.nd ___udivmodsi4
|
j.d r7
|
j.d r7
|
mov r0,r1
|
mov r0,r1
|
#endif
|
#endif
|
|
|
#endif /* L_umodsi3 */
|
#endif /* L_umodsi3 */
|
|
|
#ifdef L_modsi3
|
#ifdef L_modsi3
|
.section .text
|
.section .text
|
.align 4
|
.align 4
|
|
|
#ifdef __base__
|
#ifdef __base__
|
.cpu base
|
.cpu base
|
.global ___modsi3
|
.global ___modsi3
|
___modsi3:
|
___modsi3:
|
mov r7,blink
|
mov r7,blink
|
bl.nd ___divnorm
|
bl.nd ___divnorm
|
bl.nd ___udivmodsi4
|
bl.nd ___udivmodsi4
|
and.f 0,r6,2
|
and.f 0,r6,2
|
sub.nz r1,0,r1
|
sub.nz r1,0,r1
|
j.d r7
|
j.d r7
|
mov r0,r1
|
mov r0,r1
|
#endif
|
#endif
|
|
|
#endif /* L_modsi3 */
|
#endif /* L_modsi3 */
|
|
|