diff options
Diffstat (limited to 'libc/arch-arm/cortex-a9/bionic/memset.S')
| -rw-r--r-- | libc/arch-arm/cortex-a9/bionic/memset.S | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/libc/arch-arm/cortex-a9/bionic/memset.S b/libc/arch-arm/cortex-a9/bionic/memset.S index 8ee6ac2..b39fcc4 100644 --- a/libc/arch-arm/cortex-a9/bionic/memset.S +++ b/libc/arch-arm/cortex-a9/bionic/memset.S @@ -69,12 +69,9 @@ END(bzero) ENTRY(memset) // The neon memset only wins for less than 132. cmp r2, #132 - bhi __memset_large_copy - - stmfd sp!, {r0} - .cfi_def_cfa_offset 4 - .cfi_rel_offset r0, 0 + bhi .L_memset_large_copy + mov r3, r0 vdup.8 q0, r1 /* make sure we have at least 32 bytes to write */ @@ -84,7 +81,7 @@ ENTRY(memset) 1: /* The main loop writes 32 bytes at a time */ subs r2, r2, #32 - vst1.8 {d0 - d3}, [r0]! + vst1.8 {d0 - d3}, [r3]! bhs 1b 2: /* less than 32 left */ @@ -93,22 +90,20 @@ ENTRY(memset) beq 3f // writes 16 bytes, 128-bits aligned - vst1.8 {d0, d1}, [r0]! + vst1.8 {d0, d1}, [r3]! 3: /* write up to 15-bytes (count in r2) */ movs ip, r2, lsl #29 bcc 1f - vst1.8 {d0}, [r0]! + vst1.8 {d0}, [r3]! 1: bge 2f - vst1.32 {d0[0]}, [r0]! + vst1.32 {d0[0]}, [r3]! 2: movs ip, r2, lsl #31 - strbmi r1, [r0], #1 - strbcs r1, [r0], #1 - strbcs r1, [r0], #1 - ldmfd sp!, {r0} + strbmi r1, [r3], #1 + strbcs r1, [r3], #1 + strbcs r1, [r3], #1 bx lr -END(memset) -ENTRY_PRIVATE(__memset_large_copy) +.L_memset_large_copy: /* compute the offset to align the destination * offset = (4-(src&3))&3 = -src & 3 */ @@ -136,8 +131,7 @@ ENTRY_PRIVATE(__memset_large_copy) strbcs r1, [r0], #1 strbmi r1, [r0], #1 subs r2, r2, r3 - popls {r0, r4-r7, lr} /* return */ - bxls lr + popls {r0, r4-r7, pc} /* return */ /* align the destination to a cache-line */ mov r12, r1 @@ -180,9 +174,8 @@ ENTRY_PRIVATE(__memset_large_copy) strhmi r1, [r0], #2 movs r2, r2, lsl #2 strbcs r1, [r0] - ldmfd sp!, {r0, r4-r7, lr} - bx lr -END(__memset_large_copy) + ldmfd sp!, {r0, r4-r7, pc} +END(memset) .data error_string: |