diff options
Diffstat (limited to 'arch/arm/lib/csumpartial.S')
| -rw-r--r-- | arch/arm/lib/csumpartial.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/lib/csumpartial.S b/arch/arm/lib/csumpartial.S index 31d3cb34740d..e9a504e4302e 100644 --- a/arch/arm/lib/csumpartial.S +++ b/arch/arm/lib/csumpartial.S @@ -39,6 +39,7 @@ td3 .req lr /* we must have at least one byte. */ tst buf, #1 @ odd address? + itttt ne movne sum, sum, ror #8 ldrneb td0, [buf], #1 subne len, len, #1 @@ -68,25 +69,30 @@ td3 .req lr bne .Lless8_wordlp .Lless8_byte: tst len, #1 @ odd number of bytes + itt ne ldrneb td0, [buf], #1 @ include last byte adcnes sum, sum, td0, put_byte_0 @ update checksum .Ldone: adc r0, sum, #0 @ collect up the last carry ldr td0, [sp], #4 tst td0, #1 @ check buffer alignment + it ne movne r0, r0, ror #8 @ rotate checksum by 8 bits ldr pc, [sp], #4 @ return .Lnot_aligned: tst buf, #1 @ odd address + ittt ne ldrneb td0, [buf], #1 @ make even subne len, len, #1 adcnes sum, sum, td0, put_byte_1 @ update checksum tst buf, #2 @ 32-bit aligned? #if __LINUX_ARM_ARCH__ >= 4 + itt ne ldrneh td0, [buf], #2 @ make 32-bit aligned subne len, len, #2 #else + itttt ne ldrneb td0, [buf], #1 ldrneb ip, [buf], #1 subne len, len, #2 @@ -96,6 +102,7 @@ td3 .req lr orrne td0, ip, td0, lsl #8 #endif #endif + it ne adcnes sum, sum, td0 @ update checksum mov pc, lr @@ -105,10 +112,12 @@ ENTRY(csum_partial) blo .Lless8 @ 8 bytes to copy. tst buf, #1 + it ne movne sum, sum, ror #8 adds sum, sum, #0 @ C = 0 tst buf, #3 @ Test destination alignment + it ne blne .Lnot_aligned @ align destination, return here 1: bics ip, len, #31 |