mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
fabb626ad6
Cosmetic updates and trivial fixes of m32r arch-dependent files. - Remove RCS ID strings and trailing white lines - Other misc. cosmetic updates Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
92 lines
1.6 KiB
ArmAsm
92 lines
1.6 KiB
ArmAsm
/*
|
|
* linux/arch/m32r/lib/memcpy.S
|
|
*
|
|
* Copyright (C) 2001 Hiroyuki Kondo, and Hirokazu Takata
|
|
* Copyright (C) 2004 Hirokazu Takata
|
|
*
|
|
* void *memcopy(void *dst, const void *src, int n);
|
|
*
|
|
* dst: r0
|
|
* src: r1
|
|
* n : r2
|
|
*/
|
|
|
|
.text
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
#ifdef CONFIG_ISA_DUAL_ISSUE
|
|
|
|
.text
|
|
ENTRY(memcpy)
|
|
memcopy:
|
|
mv r4, r0 || mv r7, r0
|
|
or r7, r1 || cmpz r2
|
|
jc r14 || cmpeq r0, r1 ; return if r2=0
|
|
jc r14 ; return if r0=r1
|
|
|
|
and3 r7, r7, #3
|
|
bnez r7, byte_copy
|
|
srl3 r3, r2, #2
|
|
and3 r2, r2, #3
|
|
beqz r3, byte_copy
|
|
addi r4, #-4
|
|
word_copy:
|
|
ld r7, @r1+ || addi r3, #-1
|
|
st r7, @+r4 || cmpz r2
|
|
bnez r3, word_copy
|
|
addi r4, #4 || jc r14 ; return if r2=0
|
|
#if defined(CONFIG_ISA_M32R2)
|
|
byte_copy:
|
|
ldb r7, @r1 || addi r1, #1
|
|
addi r2, #-1 || stb r7, @r4+
|
|
bnez r2, byte_copy
|
|
#elif defined(CONFIG_ISA_M32R)
|
|
byte_copy:
|
|
ldb r7, @r1 || addi r1, #1
|
|
addi r2, #-1 || stb r7, @r4
|
|
addi r4, #1
|
|
bnez r2, byte_copy
|
|
#else
|
|
#error unknown isa configuration
|
|
#endif
|
|
end_memcopy:
|
|
jmp r14
|
|
|
|
#else /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.text
|
|
ENTRY(memcpy)
|
|
memcopy:
|
|
mv r4, r0
|
|
mv r7, r0
|
|
or r7, r1
|
|
beq r0, r1, end_memcopy
|
|
beqz r2, end_memcopy
|
|
|
|
and3 r7, r7, #3
|
|
bnez r7, byte_copy
|
|
srl3 r3, r2, #2
|
|
and3 r2, r2, #3
|
|
beqz r3, byte_copy
|
|
addi r4, #-4
|
|
word_copy:
|
|
ld r7, @r1+
|
|
addi r3, #-1
|
|
st r7, @+r4
|
|
bnez r3, word_copy
|
|
beqz r2, end_memcopy
|
|
addi r4, #4
|
|
byte_copy:
|
|
ldb r7, @r1
|
|
addi r1, #1
|
|
addi r2, #-1
|
|
stb r7, @r4
|
|
addi r4, #1
|
|
bnez r2, byte_copy
|
|
end_memcopy:
|
|
jmp r14
|
|
|
|
#endif /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.end
|