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-rw-r--r--arch/arm/lib/csumpartial.S32
1 files changed, 18 insertions, 14 deletions
diff --git a/arch/arm/lib/csumpartial.S b/arch/arm/lib/csumpartial.S
index cb5e3708f11..a78dae5a7b2 100644
--- a/arch/arm/lib/csumpartial.S
+++ b/arch/arm/lib/csumpartial.S
@@ -26,7 +26,7 @@ td1 .req r4 @ save before use
td2 .req r5 @ save before use
td3 .req lr
-.zero: mov r0, sum
+.Lzero: mov r0, sum
add sp, sp, #4
ldr pc, [sp], #4
@@ -34,21 +34,22 @@ td3 .req lr
* Handle 0 to 7 bytes, with any alignment of source and
* destination pointers. Note that when we get here, C = 0
*/
-.less8: teq len, #0 @ check for zero count
- beq .zero
+.Lless8: teq len, #0 @ check for zero count
+ beq .Lzero
/* we must have at least one byte. */
tst buf, #1 @ odd address?
+ movne sum, sum, ror #8
ldrneb td0, [buf], #1
subne len, len, #1
adcnes sum, sum, td0, put_byte_1
-.less4: tst len, #6
- beq .less8_byte
+.Lless4: tst len, #6
+ beq .Lless8_byte
/* we are now half-word aligned */
-.less8_wordlp:
+.Lless8_wordlp:
#if __LINUX_ARM_ARCH__ >= 4
ldrh td0, [buf], #2
sub len, len, #2
@@ -64,19 +65,19 @@ td3 .req lr
#endif
adcs sum, sum, td0
tst len, #6
- bne .less8_wordlp
+ bne .Lless8_wordlp
-.less8_byte: tst len, #1 @ odd number of bytes
+.Lless8_byte: tst len, #1 @ odd number of bytes
ldrneb td0, [buf], #1 @ include last byte
adcnes sum, sum, td0, put_byte_0 @ update checksum
-.done: adc r0, sum, #0 @ collect up the last carry
+.Ldone: adc r0, sum, #0 @ collect up the last carry
ldr td0, [sp], #4
tst td0, #1 @ check buffer alignment
movne r0, r0, ror #8 @ rotate checksum by 8 bits
ldr pc, [sp], #4 @ return
-.not_aligned: tst buf, #1 @ odd address
+.Lnot_aligned: tst buf, #1 @ odd address
ldrneb td0, [buf], #1 @ make even
subne len, len, #1
adcnes sum, sum, td0, put_byte_1 @ update checksum
@@ -101,11 +102,14 @@ td3 .req lr
ENTRY(csum_partial)
stmfd sp!, {buf, lr}
cmp len, #8 @ Ensure that we have at least
- blo .less8 @ 8 bytes to copy.
+ blo .Lless8 @ 8 bytes to copy.
+
+ tst buf, #1
+ movne sum, sum, ror #8
adds sum, sum, #0 @ C = 0
tst buf, #3 @ Test destination alignment
- blne .not_aligned @ aligh destination, return here
+ blne .Lnot_aligned @ align destination, return here
1: bics ip, len, #31
beq 3f
@@ -127,11 +131,11 @@ ENTRY(csum_partial)
ldmfd sp!, {r4 - r5}
3: tst len, #0x1c @ should not change C
- beq .less4
+ beq .Lless4
4: ldr td0, [buf], #4
sub len, len, #4
adcs sum, sum, td0
tst len, #0x1c
bne 4b
- b .less4
+ b .Lless4