diff options
Diffstat (limited to 'arch/score/lib/checksum.S')
| -rw-r--r-- | arch/score/lib/checksum.S | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/arch/score/lib/checksum.S b/arch/score/lib/checksum.S deleted file mode 100644 index 1141f2b4a501..000000000000 --- a/arch/score/lib/checksum.S +++ /dev/null @@ -1,255 +0,0 @@ -/* - * arch/score/lib/csum_partial.S - * - * Score Processor version. - * - * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. - * Lennox Wu <lennox.wu@sunplusct.com> - * Chen Liqin <liqin.chen@sunplusct.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include <linux/linkage.h> - -#define ADDC(sum,reg) \ - add sum, sum, reg; \ - cmp.c reg, sum; \ - bleu 9f; \ - addi sum, 0x1; \ -9: - -#define CSUM_BIGCHUNK(src, offset, sum) \ - lw r8, [src, offset + 0x00]; \ - lw r9, [src, offset + 0x04]; \ - lw r10, [src, offset + 0x08]; \ - lw r11, [src, offset + 0x0c]; \ - ADDC(sum, r8); \ - ADDC(sum, r9); \ - ADDC(sum, r10); \ - ADDC(sum, r11); \ - lw r8, [src, offset + 0x10]; \ - lw r9, [src, offset + 0x14]; \ - lw r10, [src, offset + 0x18]; \ - lw r11, [src, offset + 0x1c]; \ - ADDC(sum, r8); \ - ADDC(sum, r9); \ - ADDC(sum, r10); \ - ADDC(sum, r11); \ - -#define src r4 -#define dest r5 -#define sum r27 - - .text -/* unknown src alignment and < 8 bytes to go */ -small_csumcpy: - mv r5, r10 - ldi r9, 0x0 - cmpi.c r25, 0x1 - beq pass_small_set_t7 /*already set, jump to pass_small_set_t7*/ - andri.c r25,r4 , 0x1 /*Is src 2 bytes aligned?*/ - -pass_small_set_t7: - beq aligned - cmpi.c r5, 0x0 - beq fold - lbu r9, [src] - slli r9,r9, 0x8 /*Little endian*/ - ADDC(sum, r9) - addi src, 0x1 - subi.c r5, 0x1 - - /*len still a full word */ -aligned: - andri.c r8, r5, 0x4 /*Len >= 4?*/ - beq len_less_4bytes - - /* Still a full word (4byte) to go,and the src is word aligned.*/ - andri.c r8, src, 0x3 /*src is 4bytes aligned, so use LW!!*/ - beq four_byte_aligned - lhu r9, [src] - addi src, 2 - ADDC(sum, r9) - lhu r9, [src] - addi src, 2 - ADDC(sum, r9) - b len_less_4bytes - -four_byte_aligned: /* Len >=4 and four byte aligned */ - lw r9, [src] - addi src, 4 - ADDC(sum, r9) - -len_less_4bytes: /* 2 byte aligned aligned and length<4B */ - andri.c r8, r5, 0x2 - beq len_less_2bytes - lhu r9, [src] - addi src, 0x2 /* src+=2 */ - ADDC(sum, r9) - -len_less_2bytes: /* len = 1 */ - andri.c r8, r5, 0x1 - beq fold /* less than 2 and not equal 1--> len=0 -> fold */ - lbu r9, [src] - -fold_ADDC: - ADDC(sum, r9) -fold: - /* fold checksum */ - slli r26, sum, 16 - add sum, sum, r26 - cmp.c r26, sum - srli sum, sum, 16 - bleu 1f /* if r26<=sum */ - addi sum, 0x1 /* r26>sum */ -1: - /* odd buffer alignment? r25 was set in csum_partial */ - cmpi.c r25, 0x0 - beq 1f - slli r26, sum, 8 - srli sum, sum, 8 - or sum, sum, r26 - andi sum, 0xffff -1: - .set optimize - /* Add the passed partial csum. */ - ADDC(sum, r6) - mv r4, sum - br r3 - .set volatile - - .align 5 -ENTRY(csum_partial) - ldi sum, 0 - ldi r25, 0 - mv r10, r5 - cmpi.c r5, 0x8 - blt small_csumcpy /* < 8(signed) bytes to copy */ - cmpi.c r5, 0x0 - beq out - andri.c r25, src, 0x1 /* odd buffer? */ - - beq word_align -hword_align: /* 1 byte */ - lbu r8, [src] - subi r5, 0x1 - slli r8, r8, 8 - ADDC(sum, r8) - addi src, 0x1 - -word_align: /* 2 bytes */ - andri.c r8, src, 0x2 /* 4bytes(dword)_aligned? */ - beq dword_align /* not, maybe dword_align */ - lhu r8, [src] - subi r5, 0x2 - ADDC(sum, r8) - addi src, 0x2 - -dword_align: /* 4bytes */ - mv r26, r5 /* maybe useless when len >=56 */ - ldi r8, 56 - cmp.c r8, r5 - bgtu do_end_words /* if a1(len)<t0(56) ,unsigned */ - andri.c r26, src, 0x4 - beq qword_align - lw r8, [src] - subi r5, 0x4 - ADDC(sum, r8) - addi src, 0x4 - -qword_align: /* 8 bytes */ - andri.c r26, src, 0x8 - beq oword_align - lw r8, [src, 0x0] - lw r9, [src, 0x4] - subi r5, 0x8 /* len-=0x8 */ - ADDC(sum, r8) - ADDC(sum, r9) - addi src, 0x8 - -oword_align: /* 16bytes */ - andri.c r26, src, 0x10 - beq begin_movement - lw r10, [src, 0x08] - lw r11, [src, 0x0c] - lw r8, [src, 0x00] - lw r9, [src, 0x04] - ADDC(sum, r10) - ADDC(sum, r11) - ADDC(sum, r8) - ADDC(sum, r9) - subi r5, 0x10 - addi src, 0x10 - -begin_movement: - srli.c r26, r5, 0x7 /* len>=128? */ - beq 1f /* len<128 */ - -/* r26 is the result that computed in oword_align */ -move_128bytes: - CSUM_BIGCHUNK(src, 0x00, sum) - CSUM_BIGCHUNK(src, 0x20, sum) - CSUM_BIGCHUNK(src, 0x40, sum) - CSUM_BIGCHUNK(src, 0x60, sum) - subi.c r26, 0x01 /* r26 equals len/128 */ - addi src, 0x80 - bne move_128bytes - -1: /* len<128,we process 64byte here */ - andri.c r10, r5, 0x40 - beq 1f - -move_64bytes: - CSUM_BIGCHUNK(src, 0x00, sum) - CSUM_BIGCHUNK(src, 0x20, sum) - addi src, 0x40 - -1: /* len<64 */ - andri r26, r5, 0x1c /* 0x1c=28 */ - andri.c r10, r5, 0x20 - beq do_end_words /* decided by andri */ - -move_32bytes: - CSUM_BIGCHUNK(src, 0x00, sum) - andri r26, r5, 0x1c - addri src, src, 0x20 - -do_end_words: /* len<32 */ - /* r26 was set already in dword_align */ - cmpi.c r26, 0x0 - beq maybe_end_cruft /* len<28 or len<56 */ - srli r26, r26, 0x2 - -end_words: - lw r8, [src] - subi.c r26, 0x1 /* unit is 4 byte */ - ADDC(sum, r8) - addi src, 0x4 - cmpi.c r26, 0x0 - bne end_words /* r26!=0 */ - -maybe_end_cruft: /* len<4 */ - andri r10, r5, 0x3 - -small_memcpy: - mv r5, r10 - j small_csumcpy - -out: - mv r4, sum - br r3 - -END(csum_partial) |