diff options
Diffstat (limited to 'libc/string/avr32/memmove.S')
| -rw-r--r-- | libc/string/avr32/memmove.S | 172 |
1 files changed, 86 insertions, 86 deletions
diff --git a/libc/string/avr32/memmove.S b/libc/string/avr32/memmove.S index 8ca4da54d..a825187a9 100644 --- a/libc/string/avr32/memmove.S +++ b/libc/string/avr32/memmove.S @@ -10,107 +10,107 @@ #define src r11 #define len r10 - .text - .global memmove - .type memmove, @function + .text + .global memmove + .type memmove, @function memmove: - cp.w src, dst - brge HIDDEN_JUMPTARGET(memcpy) - - add dst, len - add src, len - pref src[-1] - - /* - * The rest is basically the same as in memcpy.S except that - * the direction is reversed. - */ - cp.w len, 32 - brge .Lmore_than_31 - - sub len, 1 - retlt r12 -1: ld.ub r8, --src - st.b --dst, r8 - sub len, 1 - brge 1b - retal r12 + cp.w src, dst + brge HIDDEN_JUMPTARGET(memcpy) + + add dst, len + add src, len + pref src[-1] + + /* + * The rest is basically the same as in memcpy.S except that + * the direction is reversed. + */ + cp.w len, 32 + brge .Lmore_than_31 + + sub len, 1 + retlt r12 +1: ld.ub r8, --src + st.b --dst, r8 + sub len, 1 + brge 1b + retal r12 .Lmore_than_31: - pushm r0-r7, lr + pushm r0-r7, lr - /* Check alignment */ - mov r8, src - andl r8, 31, COH - brne .Lunaligned_src - mov r8, r12 - andl r8, 3, COH - brne .Lunaligned_dst +/* Check alignment */ + mov r8, src + andl r8, 31, COH + brne .Lunaligned_src + mov r8, r12 + andl r8, 3, COH + brne .Lunaligned_dst .Laligned_copy: - sub len, 32 - brlt .Lless_than_32 + sub len, 32 + brlt .Lless_than_32 -1: /* Copy 32 bytes at a time */ - sub src, 32 - ldm src, r0-r7 - sub dst, 32 - sub len, 32 - stm dst, r0-r7 - brge 1b +1: /* Copy 32 bytes at a time */ + sub src, 32 + ldm src, r0-r7 + sub dst, 32 + sub len, 32 + stm dst, r0-r7 + brge 1b .Lless_than_32: - /* Copy 16 more bytes if possible */ - sub len, -16 - brlt .Lless_than_16 - sub src, 16 - ldm src, r0-r3 - sub dst, 16 - sub len, 16 - stm dst, r0-r3 + /* Copy 16 more bytes if possible */ + sub len, -16 + brlt .Lless_than_16 + sub src, 16 + ldm src, r0-r3 + sub dst, 16 + sub len, 16 + stm dst, r0-r3 .Lless_than_16: - /* Do the remaining as byte copies */ - sub len, -16 - breq 2f -1: ld.ub r0, --src - st.b --dst, r0 - sub len, 1 - brne 1b + /* Do the remaining as byte copies */ + sub len, -16 + breq 2f +1: ld.ub r0, --src + st.b --dst, r0 + sub len, 1 + brne 1b -2: popm r0-r7, pc +2: popm r0-r7, pc .Lunaligned_src: - /* Make src cacheline-aligned. r8 = (src & 31) */ - sub len, r8 -1: ld.ub r0, --src - st.b --dst, r0 - sub r8, 1 - brne 1b - - /* If dst is word-aligned, we're ready to go */ - pref src[-4] - mov r8, 3 - tst dst, r8 - breq .Laligned_copy + /* Make src cacheline-aligned. r8 = (src & 31) */ + sub len, r8 +1: ld.ub r0, --src + st.b --dst, r0 + sub r8, 1 + brne 1b + + /* If dst is word-aligned, we're ready to go */ + pref src[-4] + mov r8, 3 + tst dst, r8 + breq .Laligned_copy .Lunaligned_dst: - /* src is aligned, but dst is not. Expect bad performance */ - sub len, 4 - brlt 2f -1: ld.w r0, --src - st.w --dst, r0 - sub len, 4 - brge 1b - -2: neg len - add pc, pc, len << 2 - .rept 3 - ld.ub r0, --src - st.b --dst, r0 - .endr - - popm r0-r7, pc - .size memmove, . - memmove + /* src is aligned, but dst is not. Expect bad performance */ + sub len, 4 + brlt 2f +1: ld.w r0, --src + st.w --dst, r0 + sub len, 4 + brge 1b + +2: neg len + add pc, pc, len << 2 + .rept 3 + ld.ub r0, --src + st.b --dst, r0 + .endr + + popm r0-r7, pc + .size memmove, . - memmove libc_hidden_def(memmove) |