diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/lib/csumpartialcopygeneric.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/lib/csumpartialcopygeneric.S | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/ANDROID_3.4.5/arch/arm/lib/csumpartialcopygeneric.S b/ANDROID_3.4.5/arch/arm/lib/csumpartialcopygeneric.S deleted file mode 100644 index d620a5f2..00000000 --- a/ANDROID_3.4.5/arch/arm/lib/csumpartialcopygeneric.S +++ /dev/null @@ -1,332 +0,0 @@ -/* - * linux/arch/arm/lib/csumpartialcopygeneric.S - * - * Copyright (C) 1995-2001 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * unsigned int - * csum_partial_copy_xxx(const char *src, char *dst, int len, int sum, ) - * r0 = src, r1 = dst, r2 = len, r3 = sum - * Returns : r0 = checksum - * - * Note that 'tst' and 'teq' preserve the carry flag. - */ - -src .req r0 -dst .req r1 -len .req r2 -sum .req r3 - -.Lzero: mov r0, sum - load_regs - - /* - * Align an unaligned destination pointer. We know that - * we have >= 8 bytes here, so we don't need to check - * the length. Note that the source pointer hasn't been - * aligned yet. - */ -.Ldst_unaligned: - tst dst, #1 - beq .Ldst_16bit - - load1b ip - sub len, len, #1 - adcs sum, sum, ip, put_byte_1 @ update checksum - strb ip, [dst], #1 - tst dst, #2 - moveq pc, lr @ dst is now 32bit aligned - -.Ldst_16bit: load2b r8, ip - sub len, len, #2 - adcs sum, sum, r8, put_byte_0 - strb r8, [dst], #1 - adcs sum, sum, ip, put_byte_1 - strb ip, [dst], #1 - mov pc, lr @ dst is now 32bit aligned - - /* - * Handle 0 to 7 bytes, with any alignment of source and - * destination pointers. Note that when we get here, C = 0 - */ -.Lless8: teq len, #0 @ check for zero count - beq .Lzero - - /* we must have at least one byte. */ - tst dst, #1 @ dst 16-bit aligned - beq .Lless8_aligned - - /* Align dst */ - load1b ip - sub len, len, #1 - adcs sum, sum, ip, put_byte_1 @ update checksum - strb ip, [dst], #1 - tst len, #6 - beq .Lless8_byteonly - -1: load2b r8, ip - sub len, len, #2 - adcs sum, sum, r8, put_byte_0 - strb r8, [dst], #1 - adcs sum, sum, ip, put_byte_1 - strb ip, [dst], #1 -.Lless8_aligned: - tst len, #6 - bne 1b -.Lless8_byteonly: - tst len, #1 - beq .Ldone - load1b r8 - adcs sum, sum, r8, put_byte_0 @ update checksum - strb r8, [dst], #1 - b .Ldone - -FN_ENTRY - save_regs - - cmp len, #8 @ Ensure that we have at least - blo .Lless8 @ 8 bytes to copy. - - adds sum, sum, #0 @ C = 0 - tst dst, #3 @ Test destination alignment - blne .Ldst_unaligned @ align destination, return here - - /* - * Ok, the dst pointer is now 32bit aligned, and we know - * that we must have more than 4 bytes to copy. Note - * that C contains the carry from the dst alignment above. - */ - - tst src, #3 @ Test source alignment - bne .Lsrc_not_aligned - - /* Routine for src & dst aligned */ - - bics ip, len, #15 - beq 2f - -1: load4l r4, r5, r6, r7 - stmia dst!, {r4, r5, r6, r7} - adcs sum, sum, r4 - adcs sum, sum, r5 - adcs sum, sum, r6 - adcs sum, sum, r7 - sub ip, ip, #16 - teq ip, #0 - bne 1b - -2: ands ip, len, #12 - beq 4f - tst ip, #8 - beq 3f - load2l r4, r5 - stmia dst!, {r4, r5} - adcs sum, sum, r4 - adcs sum, sum, r5 - tst ip, #4 - beq 4f - -3: load1l r4 - str r4, [dst], #4 - adcs sum, sum, r4 - -4: ands len, len, #3 - beq .Ldone - load1l r4 - tst len, #2 - mov r5, r4, get_byte_0 - beq .Lexit - adcs sum, sum, r4, push #16 - strb r5, [dst], #1 - mov r5, r4, get_byte_1 - strb r5, [dst], #1 - mov r5, r4, get_byte_2 -.Lexit: tst len, #1 - strneb r5, [dst], #1 - andne r5, r5, #255 - adcnes sum, sum, r5, put_byte_0 - - /* - * If the dst pointer was not 16-bit aligned, we - * need to rotate the checksum here to get around - * the inefficient byte manipulations in the - * architecture independent code. - */ -.Ldone: adc r0, sum, #0 - ldr sum, [sp, #0] @ dst - tst sum, #1 - movne r0, r0, ror #8 - load_regs - -.Lsrc_not_aligned: - adc sum, sum, #0 @ include C from dst alignment - and ip, src, #3 - bic src, src, #3 - load1l r5 - cmp ip, #2 - beq .Lsrc2_aligned - bhi .Lsrc3_aligned - mov r4, r5, pull #8 @ C = 0 - bics ip, len, #15 - beq 2f -1: load4l r5, r6, r7, r8 - orr r4, r4, r5, push #24 - mov r5, r5, pull #8 - orr r5, r5, r6, push #24 - mov r6, r6, pull #8 - orr r6, r6, r7, push #24 - mov r7, r7, pull #8 - orr r7, r7, r8, push #24 - stmia dst!, {r4, r5, r6, r7} - adcs sum, sum, r4 - adcs sum, sum, r5 - adcs sum, sum, r6 - adcs sum, sum, r7 - mov r4, r8, pull #8 - sub ip, ip, #16 - teq ip, #0 - bne 1b -2: ands ip, len, #12 - beq 4f - tst ip, #8 - beq 3f - load2l r5, r6 - orr r4, r4, r5, push #24 - mov r5, r5, pull #8 - orr r5, r5, r6, push #24 - stmia dst!, {r4, r5} - adcs sum, sum, r4 - adcs sum, sum, r5 - mov r4, r6, pull #8 - tst ip, #4 - beq 4f -3: load1l r5 - orr r4, r4, r5, push #24 - str r4, [dst], #4 - adcs sum, sum, r4 - mov r4, r5, pull #8 -4: ands len, len, #3 - beq .Ldone - mov r5, r4, get_byte_0 - tst len, #2 - beq .Lexit - adcs sum, sum, r4, push #16 - strb r5, [dst], #1 - mov r5, r4, get_byte_1 - strb r5, [dst], #1 - mov r5, r4, get_byte_2 - b .Lexit - -.Lsrc2_aligned: mov r4, r5, pull #16 - adds sum, sum, #0 - bics ip, len, #15 - beq 2f -1: load4l r5, r6, r7, r8 - orr r4, r4, r5, push #16 - mov r5, r5, pull #16 - orr r5, r5, r6, push #16 - mov r6, r6, pull #16 - orr r6, r6, r7, push #16 - mov r7, r7, pull #16 - orr r7, r7, r8, push #16 - stmia dst!, {r4, r5, r6, r7} - adcs sum, sum, r4 - adcs sum, sum, r5 - adcs sum, sum, r6 - adcs sum, sum, r7 - mov r4, r8, pull #16 - sub ip, ip, #16 - teq ip, #0 - bne 1b -2: ands ip, len, #12 - beq 4f - tst ip, #8 - beq 3f - load2l r5, r6 - orr r4, r4, r5, push #16 - mov r5, r5, pull #16 - orr r5, r5, r6, push #16 - stmia dst!, {r4, r5} - adcs sum, sum, r4 - adcs sum, sum, r5 - mov r4, r6, pull #16 - tst ip, #4 - beq 4f -3: load1l r5 - orr r4, r4, r5, push #16 - str r4, [dst], #4 - adcs sum, sum, r4 - mov r4, r5, pull #16 -4: ands len, len, #3 - beq .Ldone - mov r5, r4, get_byte_0 - tst len, #2 - beq .Lexit - adcs sum, sum, r4 - strb r5, [dst], #1 - mov r5, r4, get_byte_1 - strb r5, [dst], #1 - tst len, #1 - beq .Ldone - load1b r5 - b .Lexit - -.Lsrc3_aligned: mov r4, r5, pull #24 - adds sum, sum, #0 - bics ip, len, #15 - beq 2f -1: load4l r5, r6, r7, r8 - orr r4, r4, r5, push #8 - mov r5, r5, pull #24 - orr r5, r5, r6, push #8 - mov r6, r6, pull #24 - orr r6, r6, r7, push #8 - mov r7, r7, pull #24 - orr r7, r7, r8, push #8 - stmia dst!, {r4, r5, r6, r7} - adcs sum, sum, r4 - adcs sum, sum, r5 - adcs sum, sum, r6 - adcs sum, sum, r7 - mov r4, r8, pull #24 - sub ip, ip, #16 - teq ip, #0 - bne 1b -2: ands ip, len, #12 - beq 4f - tst ip, #8 - beq 3f - load2l r5, r6 - orr r4, r4, r5, push #8 - mov r5, r5, pull #24 - orr r5, r5, r6, push #8 - stmia dst!, {r4, r5} - adcs sum, sum, r4 - adcs sum, sum, r5 - mov r4, r6, pull #24 - tst ip, #4 - beq 4f -3: load1l r5 - orr r4, r4, r5, push #8 - str r4, [dst], #4 - adcs sum, sum, r4 - mov r4, r5, pull #24 -4: ands len, len, #3 - beq .Ldone - mov r5, r4, get_byte_0 - tst len, #2 - beq .Lexit - strb r5, [dst], #1 - adcs sum, sum, r4 - load1l r4 - mov r5, r4, get_byte_0 - strb r5, [dst], #1 - adcs sum, sum, r4, push #24 - mov r5, r4, get_byte_1 - b .Lexit -FN_EXIT |