+++ /dev/null
-; libgcc routines for ARC cpu.
-
-/* Copyright (C) 1995, 1997,2004, 2009 Free Software Foundation, Inc.
-
-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
-Free Software Foundation; either version 3, or (at your option) any
-later version.
-
-This file 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.
-
-Under Section 7 of GPL version 3, you are granted additional
-permissions described in the GCC Runtime Library Exception, version
-3.1, as published by the Free Software Foundation.
-
-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;
-see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
-<http://www.gnu.org/licenses/>. */
-
-#ifdef L_mulsi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___mulsi3
-___mulsi3:
-
-/* This the simple version.
-
- while (a)
- {
- if (a & 1)
- r += b;
- a >>= 1;
- b <<= 1;
- }
-*/
- mov r2,0 ; Accumulate result here.
-.Lloop:
- sub.f 0,r0,0 ; while (a)
- nop
- beq.nd .Ldone
- and.f 0,r0,1 ; if (a & 1)
- add.nz r2,r2,r1 ; r += b
- lsr r0,r0 ; a >>= 1
- b.d .Lloop
- lsl r1,r1 ; b <<= 1
-.Ldone:
- j.d blink
- mov r0,r2
-#endif
-
-#endif /* L_mulsi3 */
-
-#ifdef L_umulsidi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___umulsidi3
-___umulsidi3:
-
-/* This the simple version.
-
- while (a)
- {
- if (a & 1)
- r += b;
- a >>= 1;
- b <<= 1;
- }
-*/
- mov r2,0 ; Top part of b.
- mov r3,0 ; Accumulate result here.
- mov r4,0
-.Lloop:
- sub.f 0,r0,0 ; while (a)
- nop
- beq.nd .Ldone
- and.f 0,r0,1 ; if (a & 1)
- sub.f 0,r0,0
- nop
- beq .Ldontadd
- add.f r4,r4,r1 ; r += b
- adc r3,r3,r2
-.Ldontadd:
- lsr r0,r0 ; a >>= 1
- lsl.f r1,r1 ; b <<= 1
- b.d .Lloop
- rlc r2,r2
-.Ldone:
-#ifdef __big_endian__
- mov r1,r4
- j.d blink
- mov r0,r3
-#else
- mov r0,r4
- j.d blink
- mov r1,r3
-#endif
-#endif
-
-#endif /* L_umulsidi3 */
-
-#ifdef L_divmod_tools
-
-; Utilities used by all routines.
-
- .section .text
- .align 4
-
-; inputs: r0 = numerator, r1 = denominator
-; outputs: positive r0/r1,
-; r6.bit1 = sign of numerator, r6.bit0 = sign of result
-
- .global ___divnorm
-___divnorm:
- mov r6,0 ; keep sign in r6
- sub.f 0,r0,0 ; is numerator -ve?
- sub.lt r0,0,r0 ; negate numerator
- mov.lt r6,3 ; sign is -ve
- sub.f 0,r1,0 ; is denominator -ve?
- sub.lt r1,0,r1 ; negate denominator
- xor.lt r6,r6,1 ; toggle sign
- j.nd blink
-
-/*
-unsigned long
-udivmodsi4(int modwanted, unsigned long num, unsigned long den)
-{
- unsigned long bit = 1;
- unsigned long res = 0;
-
- while (den < num && bit && !(den & (1L<<31)))
- {
- den <<=1;
- bit <<=1;
- }
- while (bit)
- {
- if (num >= den)
- {
- num -= den;
- res |= bit;
- }
- bit >>=1;
- den >>=1;
- }
- if (modwanted) return num;
- return res;
-}
-*/
-
-; inputs: r0 = numerator, r1 = denominator
-; outputs: r0 = quotient, r1 = remainder, r2/r3 trashed
-
- .global ___udivmodsi4
-___udivmodsi4:
- mov r2,1 ; bit = 1
- mov r3,0 ; res = 0
-.Lloop1:
- sub.f 0,r1,r0 ; while (den < num
- nop
- bnc.nd .Lloop2
- sub.f 0,r2,0 ; && bit
- nop
- bz.nd .Lloop2
- lsl.f 0,r1 ; && !(den & (1<<31))
- nop
- bc.nd .Lloop2
- lsl r1,r1 ; den <<= 1
- b.d .Lloop1
- lsl r2,r2 ; bit <<= 1
-.Lloop2:
- sub.f 0,r2,0 ; while (bit)
- nop
- bz.nd .Ldivmodend
- sub.f 0,r0,r1 ; if (num >= den)
- nop
- bc.nd .Lshiftdown
- sub r0,r0,r1 ; num -= den
- or r3,r3,r2 ; res |= bit
-.Lshiftdown:
- lsr r2,r2 ; bit >>= 1
- b.d .Lloop2
- lsr r1,r1 ; den >>= 1
-.Ldivmodend:
- mov r1,r0 ; r1 = mod
- j.d blink
- mov r0,r3 ; r0 = res
-
-#endif
-
-#ifdef L_udivsi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___udivsi3
-___udivsi3:
- mov r7,blink
- bl.nd ___udivmodsi4
- j.nd r7
-#endif
-
-#endif /* L_udivsi3 */
-
-#ifdef L_divsi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___divsi3
-___divsi3:
- mov r7,blink
- bl.nd ___divnorm
- bl.nd ___udivmodsi4
- and.f 0,r6,1
- sub.nz r0,0,r0 ; cannot go in delay slot, has limm value
- j.nd r7
-#endif
-
-#endif /* L_divsi3 */
-
-#ifdef L_umodsi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___umodsi3
-___umodsi3:
- mov r7,blink
- bl.nd ___udivmodsi4
- j.d r7
- mov r0,r1
-#endif
-
-#endif /* L_umodsi3 */
-
-#ifdef L_modsi3
- .section .text
- .align 4
-
-#ifdef __base__
- .cpu base
- .global ___modsi3
-___modsi3:
- mov r7,blink
- bl.nd ___divnorm
- bl.nd ___udivmodsi4
- and.f 0,r6,2
- sub.nz r1,0,r1
- j.d r7
- mov r0,r1
-#endif
-
-#endif /* L_modsi3 */
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