diff options
Diffstat (limited to 'arch/arm/lib/csumpartial.S')
| -rw-r--r-- | arch/arm/lib/csumpartial.S | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/arch/arm/lib/csumpartial.S b/arch/arm/lib/csumpartial.S index fe797cf320bb..a78dae5a7b28 100644 --- a/arch/arm/lib/csumpartial.S +++ b/arch/arm/lib/csumpartial.S | |||
| @@ -26,7 +26,7 @@ td1 .req r4 @ save before use | |||
| 26 | td2 .req r5 @ save before use | 26 | td2 .req r5 @ save before use |
| 27 | td3 .req lr | 27 | td3 .req lr |
| 28 | 28 | ||
| 29 | .zero: mov r0, sum | 29 | .Lzero: mov r0, sum |
| 30 | add sp, sp, #4 | 30 | add sp, sp, #4 |
| 31 | ldr pc, [sp], #4 | 31 | ldr pc, [sp], #4 |
| 32 | 32 | ||
| @@ -34,8 +34,8 @@ td3 .req lr | |||
| 34 | * Handle 0 to 7 bytes, with any alignment of source and | 34 | * Handle 0 to 7 bytes, with any alignment of source and |
| 35 | * destination pointers. Note that when we get here, C = 0 | 35 | * destination pointers. Note that when we get here, C = 0 |
| 36 | */ | 36 | */ |
| 37 | .less8: teq len, #0 @ check for zero count | 37 | .Lless8: teq len, #0 @ check for zero count |
| 38 | beq .zero | 38 | beq .Lzero |
| 39 | 39 | ||
| 40 | /* we must have at least one byte. */ | 40 | /* we must have at least one byte. */ |
| 41 | tst buf, #1 @ odd address? | 41 | tst buf, #1 @ odd address? |
| @@ -44,12 +44,12 @@ td3 .req lr | |||
| 44 | subne len, len, #1 | 44 | subne len, len, #1 |
| 45 | adcnes sum, sum, td0, put_byte_1 | 45 | adcnes sum, sum, td0, put_byte_1 |
| 46 | 46 | ||
| 47 | .less4: tst len, #6 | 47 | .Lless4: tst len, #6 |
| 48 | beq .less8_byte | 48 | beq .Lless8_byte |
| 49 | 49 | ||
| 50 | /* we are now half-word aligned */ | 50 | /* we are now half-word aligned */ |
| 51 | 51 | ||
| 52 | .less8_wordlp: | 52 | .Lless8_wordlp: |
| 53 | #if __LINUX_ARM_ARCH__ >= 4 | 53 | #if __LINUX_ARM_ARCH__ >= 4 |
| 54 | ldrh td0, [buf], #2 | 54 | ldrh td0, [buf], #2 |
| 55 | sub len, len, #2 | 55 | sub len, len, #2 |
| @@ -65,19 +65,19 @@ td3 .req lr | |||
| 65 | #endif | 65 | #endif |
| 66 | adcs sum, sum, td0 | 66 | adcs sum, sum, td0 |
| 67 | tst len, #6 | 67 | tst len, #6 |
| 68 | bne .less8_wordlp | 68 | bne .Lless8_wordlp |
| 69 | 69 | ||
| 70 | .less8_byte: tst len, #1 @ odd number of bytes | 70 | .Lless8_byte: tst len, #1 @ odd number of bytes |
| 71 | ldrneb td0, [buf], #1 @ include last byte | 71 | ldrneb td0, [buf], #1 @ include last byte |
| 72 | adcnes sum, sum, td0, put_byte_0 @ update checksum | 72 | adcnes sum, sum, td0, put_byte_0 @ update checksum |
| 73 | 73 | ||
| 74 | .done: adc r0, sum, #0 @ collect up the last carry | 74 | .Ldone: adc r0, sum, #0 @ collect up the last carry |
| 75 | ldr td0, [sp], #4 | 75 | ldr td0, [sp], #4 |
| 76 | tst td0, #1 @ check buffer alignment | 76 | tst td0, #1 @ check buffer alignment |
| 77 | movne r0, r0, ror #8 @ rotate checksum by 8 bits | 77 | movne r0, r0, ror #8 @ rotate checksum by 8 bits |
| 78 | ldr pc, [sp], #4 @ return | 78 | ldr pc, [sp], #4 @ return |
| 79 | 79 | ||
| 80 | .not_aligned: tst buf, #1 @ odd address | 80 | .Lnot_aligned: tst buf, #1 @ odd address |
| 81 | ldrneb td0, [buf], #1 @ make even | 81 | ldrneb td0, [buf], #1 @ make even |
| 82 | subne len, len, #1 | 82 | subne len, len, #1 |
| 83 | adcnes sum, sum, td0, put_byte_1 @ update checksum | 83 | adcnes sum, sum, td0, put_byte_1 @ update checksum |
| @@ -102,14 +102,14 @@ td3 .req lr | |||
| 102 | ENTRY(csum_partial) | 102 | ENTRY(csum_partial) |
| 103 | stmfd sp!, {buf, lr} | 103 | stmfd sp!, {buf, lr} |
| 104 | cmp len, #8 @ Ensure that we have at least | 104 | cmp len, #8 @ Ensure that we have at least |
| 105 | blo .less8 @ 8 bytes to copy. | 105 | blo .Lless8 @ 8 bytes to copy. |
| 106 | 106 | ||
| 107 | tst buf, #1 | 107 | tst buf, #1 |
| 108 | movne sum, sum, ror #8 | 108 | movne sum, sum, ror #8 |
| 109 | 109 | ||
| 110 | adds sum, sum, #0 @ C = 0 | 110 | adds sum, sum, #0 @ C = 0 |
| 111 | tst buf, #3 @ Test destination alignment | 111 | tst buf, #3 @ Test destination alignment |
| 112 | blne .not_aligned @ aligh destination, return here | 112 | blne .Lnot_aligned @ align destination, return here |
| 113 | 113 | ||
| 114 | 1: bics ip, len, #31 | 114 | 1: bics ip, len, #31 |
| 115 | beq 3f | 115 | beq 3f |
| @@ -131,11 +131,11 @@ ENTRY(csum_partial) | |||
| 131 | ldmfd sp!, {r4 - r5} | 131 | ldmfd sp!, {r4 - r5} |
| 132 | 132 | ||
| 133 | 3: tst len, #0x1c @ should not change C | 133 | 3: tst len, #0x1c @ should not change C |
| 134 | beq .less4 | 134 | beq .Lless4 |
| 135 | 135 | ||
| 136 | 4: ldr td0, [buf], #4 | 136 | 4: ldr td0, [buf], #4 |
| 137 | sub len, len, #4 | 137 | sub len, len, #4 |
| 138 | adcs sum, sum, td0 | 138 | adcs sum, sum, td0 |
| 139 | tst len, #0x1c | 139 | tst len, #0x1c |
| 140 | bne 4b | 140 | bne 4b |
| 141 | b .less4 | 141 | b .Lless4 |
