From 0bcdda0f3a87ed684d46841b6069409e39c4af65 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Mon, 4 Dec 2006 00:42:59 +0900 Subject: [MIPS] Unify csum_partial.S The 32-bit version and 64-bit version are almost equal. Unify them. This makes further improvements (for example, copying with parallel, supporting PREFETCH, etc.) easier. Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle --- arch/mips/lib-64/csum_partial.S | 242 ---------------------------------------- 1 file changed, 242 deletions(-) delete mode 100644 arch/mips/lib-64/csum_partial.S (limited to 'arch/mips/lib-64/csum_partial.S') diff --git a/arch/mips/lib-64/csum_partial.S b/arch/mips/lib-64/csum_partial.S deleted file mode 100644 index 25aba660cc9c..000000000000 --- a/arch/mips/lib-64/csum_partial.S +++ /dev/null @@ -1,242 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Quick'n'dirty IP checksum ... - * - * Copyright (C) 1998, 1999 Ralf Baechle - * Copyright (C) 1999 Silicon Graphics, Inc. - */ -#include -#include - -#define ADDC(sum,reg) \ - addu sum, reg; \ - sltu v1, sum, reg; \ - addu sum, v1 - -#define CSUM_BIGCHUNK(src, offset, sum, t0, t1, t2, t3) \ - lw t0, (offset + 0x00)(src); \ - lw t1, (offset + 0x04)(src); \ - lw t2, (offset + 0x08)(src); \ - lw t3, (offset + 0x0c)(src); \ - ADDC(sum, t0); \ - ADDC(sum, t1); \ - ADDC(sum, t2); \ - ADDC(sum, t3); \ - lw t0, (offset + 0x10)(src); \ - lw t1, (offset + 0x14)(src); \ - lw t2, (offset + 0x18)(src); \ - lw t3, (offset + 0x1c)(src); \ - ADDC(sum, t0); \ - ADDC(sum, t1); \ - ADDC(sum, t2); \ - ADDC(sum, t3); \ - -/* - * a0: source address - * a1: length of the area to checksum - * a2: partial checksum - */ - -#define src a0 -#define sum v0 - - .text - .set noreorder - -/* unknown src alignment and < 8 bytes to go */ -small_csumcpy: - move a1, ta2 - - andi ta0, a1, 4 - beqz ta0, 1f - andi ta0, a1, 2 - - /* Still a full word to go */ - ulw ta1, (src) - daddiu src, 4 - ADDC(sum, ta1) - -1: move ta1, zero - beqz ta0, 1f - andi ta0, a1, 1 - - /* Still a halfword to go */ - ulhu ta1, (src) - daddiu src, 2 - -1: beqz ta0, 1f - sll ta1, ta1, 16 - - lbu ta2, (src) - nop - -#ifdef __MIPSEB__ - sll ta2, ta2, 8 -#endif - or ta1, ta2 - -1: ADDC(sum, ta1) - - /* fold checksum */ - sll v1, sum, 16 - addu sum, v1 - sltu v1, sum, v1 - srl sum, sum, 16 - addu sum, v1 - - /* odd buffer alignment? */ - beqz t3, 1f - nop - sll v1, sum, 8 - srl sum, sum, 8 - or sum, v1 - andi sum, 0xffff -1: - .set reorder - /* Add the passed partial csum. */ - ADDC(sum, a2) - jr ra - .set noreorder - -/* ------------------------------------------------------------------------- */ - - .align 5 -LEAF(csum_partial) - move sum, zero - move t3, zero - - sltiu t8, a1, 0x8 - bnez t8, small_csumcpy /* < 8 bytes to copy */ - move ta2, a1 - - beqz a1, out - andi t3, src, 0x1 /* odd buffer? */ - -hword_align: - beqz t3, word_align - andi t8, src, 0x2 - - lbu ta0, (src) - dsubu a1, a1, 0x1 -#ifdef __MIPSEL__ - sll ta0, ta0, 8 -#endif - ADDC(sum, ta0) - daddu src, src, 0x1 - andi t8, src, 0x2 - -word_align: - beqz t8, dword_align - sltiu t8, a1, 56 - - lhu ta0, (src) - dsubu a1, a1, 0x2 - ADDC(sum, ta0) - sltiu t8, a1, 56 - daddu src, src, 0x2 - -dword_align: - bnez t8, do_end_words - move t8, a1 - - andi t8, src, 0x4 - beqz t8, qword_align - andi t8, src, 0x8 - - lw ta0, 0x00(src) - dsubu a1, a1, 0x4 - ADDC(sum, ta0) - daddu src, src, 0x4 - andi t8, src, 0x8 - -qword_align: - beqz t8, oword_align - andi t8, src, 0x10 - - lw ta0, 0x00(src) - lw ta1, 0x04(src) - dsubu a1, a1, 0x8 - ADDC(sum, ta0) - ADDC(sum, ta1) - daddu src, src, 0x8 - andi t8, src, 0x10 - -oword_align: - beqz t8, begin_movement - dsrl t8, a1, 0x7 - - lw ta3, 0x08(src) - lw t0, 0x0c(src) - lw ta0, 0x00(src) - lw ta1, 0x04(src) - ADDC(sum, ta3) - ADDC(sum, t0) - ADDC(sum, ta0) - ADDC(sum, ta1) - dsubu a1, a1, 0x10 - daddu src, src, 0x10 - dsrl t8, a1, 0x7 - -begin_movement: - beqz t8, 1f - andi ta2, a1, 0x40 - -move_128bytes: - CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0) - CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0) - CSUM_BIGCHUNK(src, 0x40, sum, ta0, ta1, ta3, t0) - CSUM_BIGCHUNK(src, 0x60, sum, ta0, ta1, ta3, t0) - dsubu t8, t8, 0x01 - bnez t8, move_128bytes - daddu src, src, 0x80 - -1: - beqz ta2, 1f - andi ta2, a1, 0x20 - -move_64bytes: - CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0) - CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0) - daddu src, src, 0x40 - -1: - beqz ta2, do_end_words - andi t8, a1, 0x1c - -move_32bytes: - CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0) - andi t8, a1, 0x1c - daddu src, src, 0x20 - -do_end_words: - beqz t8, maybe_end_cruft - dsrl t8, t8, 0x2 - -end_words: - lw ta0, (src) - dsubu t8, t8, 0x1 - ADDC(sum, ta0) - bnez t8, end_words - daddu src, src, 0x4 - -maybe_end_cruft: - andi ta2, a1, 0x3 - -small_memcpy: - j small_csumcpy; move a1, ta2 /* XXX ??? */ - beqz t2, out - move a1, ta2 - -end_bytes: - lb ta0, (src) - dsubu a1, a1, 0x1 - bnez a2, end_bytes - daddu src, src, 0x1 - -out: - jr ra - move v0, sum - END(csum_partial) -- cgit v1.2.3