diff options
Diffstat (limited to 'src/target/firmware/lib/memcmp.S')
| -rw-r--r-- | src/target/firmware/lib/memcmp.S | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/target/firmware/lib/memcmp.S b/src/target/firmware/lib/memcmp.S new file mode 100644 index 00000000..c60b170b --- /dev/null +++ b/src/target/firmware/lib/memcmp.S @@ -0,0 +1,18 @@ + .text + .code 32 + .globl memcmp +memcmp: + cmp r2, #0 + beq zero_len_out + mov r3, r0 +1: ldrb r0, [r3], #1 + ldrb r12, [r1], #1 + subs r0, r0, r12 + bxne lr + subs r2, r2, #1 + bne 1b + bx lr + +zero_len_out: + mov r0, #0 + bx lr |