mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
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>
179 lines
3.1 KiB
ArmAsm
179 lines
3.1 KiB
ArmAsm
/*
|
|
* linux/arch/m32r/lib/memset.S
|
|
*
|
|
* Copyright (C) 2001,2002 Hiroyuki Kondo, and Hirokazu Takata
|
|
* Copyright (C) 2004 Hirokazu Takata
|
|
*
|
|
* void *memset(void *dst, int val, int len);
|
|
*
|
|
* dst: r0
|
|
* val: r1
|
|
* len: r2
|
|
* ret: r0
|
|
*
|
|
*/
|
|
|
|
.text
|
|
.global memset
|
|
|
|
#ifdef CONFIG_ISA_DUAL_ISSUE
|
|
|
|
.align 4
|
|
memset:
|
|
mv r4, r0 || cmpz r2
|
|
jc r14
|
|
cmpui r2, #16
|
|
bnc qword_align_check
|
|
cmpui r2, #4
|
|
bc byte_set
|
|
word_align_check: /* len >= 4 */
|
|
and3 r3, r4, #3
|
|
beqz r3, word_set
|
|
addi r3, #-4
|
|
neg r3, r3 /* r3 = -(r3 - 4) */
|
|
align_word:
|
|
stb r1, @r4 || addi r4, #1
|
|
addi r2, #-1 || addi r3, #-1
|
|
bnez r3, align_word
|
|
cmpui r2, #4
|
|
bc byte_set
|
|
word_set:
|
|
and3 r1, r1, #0x00ff /* r1: abababab <-- ??????ab */
|
|
sll3 r3, r1, #8
|
|
or r1, r3 || addi r4, #-4
|
|
sll3 r3, r1, #16
|
|
or r1, r3 || addi r2, #-4
|
|
word_set_loop:
|
|
st r1, @+r4 || addi r2, #-4
|
|
bgtz r2, word_set_loop
|
|
bnez r2, byte_set_wrap
|
|
st r1, @+r4
|
|
jmp r14
|
|
|
|
qword_align_check: /* len >= 16 */
|
|
and3 r3, r4, #15
|
|
bnez r3, word_align_check
|
|
qword_set:
|
|
and3 r1, r1, #0x00ff /* r1: abababab <-- ??????ab */
|
|
sll3 r3, r1, #8
|
|
or r1, r3 || addi r4, #-4
|
|
sll3 r3, r1, #16
|
|
or r1, r3 || ldi r5, #16
|
|
qword_set_loop:
|
|
ld r3, @(4,r4) /* cache line allocate */
|
|
st r1, @+r4 || addi r2, #-16
|
|
st r1, @+r4 || cmpu r2, r5
|
|
st r1, @+r4
|
|
st r1, @+r4
|
|
bnc qword_set_loop || cmpz r2
|
|
jc r14
|
|
set_remainder:
|
|
cmpui r2, #4
|
|
bc byte_set_wrap1
|
|
addi r2, #-4
|
|
bra word_set_loop
|
|
|
|
byte_set_wrap:
|
|
addi r2, #4
|
|
cmpz r2
|
|
jc r14
|
|
byte_set_wrap1:
|
|
addi r4, #4
|
|
#if defined(CONFIG_ISA_M32R2)
|
|
byte_set:
|
|
addi r2, #-1 || stb r1, @r4+
|
|
bnez r2, byte_set
|
|
#elif defined(CONFIG_ISA_M32R)
|
|
byte_set:
|
|
addi r2, #-1 || stb r1, @r4
|
|
addi r4, #1
|
|
bnez r2, byte_set
|
|
#else
|
|
#error unknown isa configuration
|
|
#endif
|
|
end_memset:
|
|
jmp r14
|
|
|
|
#else /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.align 4
|
|
memset:
|
|
mv r4, r0
|
|
beqz r2, end_memset
|
|
cmpui r2, #16
|
|
bnc qword_align_check
|
|
cmpui r2, #4
|
|
bc byte_set
|
|
word_align_check: /* len >= 4 */
|
|
and3 r3, r4, #3
|
|
beqz r3, word_set
|
|
addi r3, #-4
|
|
neg r3, r3 /* r3 = -(r3 - 4) */
|
|
align_word:
|
|
stb r1, @r4
|
|
addi r4, #1
|
|
addi r2, #-1
|
|
addi r3, #-1
|
|
bnez r3, align_word
|
|
cmpui r2, #4
|
|
bc byte_set
|
|
word_set:
|
|
and3 r1, r1, #0x00ff /* r1: abababab <-- ??????ab */
|
|
sll3 r3, r1, #8
|
|
or r1, r3
|
|
sll3 r3, r1, #16
|
|
or r1, r3
|
|
addi r2, #-4
|
|
addi r4, #-4
|
|
word_set_loop:
|
|
st r1, @+r4
|
|
addi r2, #-4
|
|
bgtz r2, word_set_loop
|
|
bnez r2, byte_set_wrap
|
|
st r1, @+r4
|
|
jmp r14
|
|
|
|
qword_align_check: /* len >= 16 */
|
|
and3 r3, r4, #15
|
|
bnez r3, word_align_check
|
|
qword_set:
|
|
and3 r1, r1, #0x00ff /* r1: abababab <-- ??????ab */
|
|
sll3 r3, r1, #8
|
|
or r1, r3
|
|
sll3 r3, r1, #16
|
|
or r1, r3
|
|
addi r4, #-4
|
|
qword_set_loop:
|
|
ld r3, @(4,r4) /* cache line allocate */
|
|
addi r2, #-16
|
|
st r1, @+r4
|
|
st r1, @+r4
|
|
cmpui r2, #16
|
|
st r1, @+r4
|
|
st r1, @+r4
|
|
bnc qword_set_loop
|
|
bnez r2, set_remainder
|
|
jmp r14
|
|
set_remainder:
|
|
cmpui r2, #4
|
|
bc byte_set_wrap1
|
|
addi r2, #-4
|
|
bra word_set_loop
|
|
|
|
byte_set_wrap:
|
|
addi r2, #4
|
|
beqz r2, end_memset
|
|
byte_set_wrap1:
|
|
addi r4, #4
|
|
byte_set:
|
|
addi r2, #-1
|
|
stb r1, @r4
|
|
addi r4, #1
|
|
bnez r2, byte_set
|
|
end_memset:
|
|
jmp r14
|
|
|
|
#endif /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.end
|