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implement _cu_memset, cu_memzero & cu_memtest in ARMv7, dynamic struct working now

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mykola2312 2022-05-21 08:49:49 +03:00
parent 13b40a44d3
commit 089366af77
2 changed files with 67 additions and 3 deletions
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66
arch/ARMv7.S
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@ -104,17 +104,81 @@ _cu_memcmp:
pop {r4, r5}
bx lr
.cmpnot:
mov r0, #1
pop {r4, r5}
bx lr
_cu_memset:
// r0 - dst, r1 - val, r2 - size
push {r4}
orr r4, r1, r1, lsl #0
orr r4, r4, r1, lsl #8
orr r4, r4, r1, lsl #16
orr r4, r4, r1, lsl #24
mov r3, r2, lsr #2
tst r3, r3
beq .set1_
.set4:
str r4, [r0], #4
subs r3, r3, #1
bne .set4
.set1_:
ands r3, r2, #3
beq .set0
.set1:
strb r4, [r0], #1
subs r3, r3, #1
bne .set1
.set0:
pop {r4}
bx lr
cu_memzero:
// r0 - dst, r1 - size
eor r3, r3, r3
mov r2, r1, lsr #2
tst r2, r2
beq .zero1_
.zero4:
str r3, [r0], #4
subs r2, r2, #1
bne .zero4
.zero1_:
ands r2, r1, #3
beq .zero0
.zero1:
strb r3, [r0], #1
subs r2, r2, #1
bne .zero1
.zero0:
bx lr
cu_memtest:
// r0 - src, r1 - size
mov r2, r1, lsr #2
tst r2, r2
beq .test1_
.test4:
ldr r3, [r0], #4
tst r3, r3
bne .testnot
subs r2, r2, #1
bne .test4
.test1_:
ands r2, r1, #3
beq .testok
.test1:
ldrb r3, [r0], #1
tst r3, r3
bne .testnot
subs r2, r2, #1
bne .test1
.testok:
eor r0, r0, r0
bx lr
.testnot:
bx lr
cu_va_start:

4
test.c
View file

@ -162,7 +162,7 @@ int main()
printf("%x\t%x\n", 0x12345678, cu_bswap32(0x12345678));
printf("%lx\t%lx\n", 0x12345678abcd8765, cu_bswap64(0x12345678abcd8765));
/*printf("[struct]\n");
printf("[struct]\n");
printf("value_offset\t%u\n", value_offset(CU_STRUCT(test_s), 4, &test));
printf("value_size\t%u\n", value_size(CU_STRUCT(test_s), 4, &test));
uint64_t value;
@ -172,7 +172,7 @@ int main()
struct_size(CU_STRUCT(test_s), &test));
printf("value_offset\t%u\n", value_offset(CU_STRUCT(test_s), 5, &test));
printf("value_size\t%u\n", value_size(CU_STRUCT(test_s), 5, &test));
*/
char c0 = 0;
printf("cu_memset\tc0\t%p\n", cu_memtest(&c0, 1));