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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-12-04 00:42:59 +0900
committerRalf Baechle <ralf@linux-mips.org>2006-12-04 22:43:13 +0000
commit0bcdda0f3a87ed684d46841b6069409e39c4af65 (patch)
tree52df8fc8d148b98188c09152bcf6e55c55a98c2a /arch/mips/lib-32
parent03dbd2e0b1dcb24d63f64aa234cce3a7fabed328 (diff)
[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 <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib-32')
-rw-r--r--arch/mips/lib-32/Makefile2
-rw-r--r--arch/mips/lib-32/csum_partial.S240
2 files changed, 1 insertions, 241 deletions
diff --git a/arch/mips/lib-32/Makefile b/arch/mips/lib-32/Makefile
index ad285786e74..dcd4d2ed2ac 100644
--- a/arch/mips/lib-32/Makefile
+++ b/arch/mips/lib-32/Makefile
@@ -2,7 +2,7 @@
# Makefile for MIPS-specific library files..
#
-lib-y += csum_partial.o memset.o watch.o
+lib-y += memset.o watch.o
obj-$(CONFIG_CPU_MIPS32) += dump_tlb.o
obj-$(CONFIG_CPU_MIPS64) += dump_tlb.o
diff --git a/arch/mips/lib-32/csum_partial.S b/arch/mips/lib-32/csum_partial.S
deleted file mode 100644
index ea257dbdcc4..00000000000
--- a/arch/mips/lib-32/csum_partial.S
+++ /dev/null
@@ -1,240 +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.
- *
- * Copyright (C) 1998 Ralf Baechle
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-
-#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 dest a1
-#define sum v0
-
- .text
- .set noreorder
-
-/* unknown src alignment and < 8 bytes to go */
-small_csumcpy:
- move a1, t2
-
- andi t0, a1, 4
- beqz t0, 1f
- andi t0, a1, 2
-
- /* Still a full word to go */
- ulw t1, (src)
- addiu src, 4
- ADDC(sum, t1)
-
-1: move t1, zero
- beqz t0, 1f
- andi t0, a1, 1
-
- /* Still a halfword to go */
- ulhu t1, (src)
- addiu src, 2
-
-1: beqz t0, 1f
- sll t1, t1, 16
-
- lbu t2, (src)
- nop
-
-#ifdef __MIPSEB__
- sll t2, t2, 8
-#endif
- or t1, t2
-
-1: ADDC(sum, t1)
-
- /* fold checksum */
- sll v1, sum, 16
- addu sum, v1
- sltu v1, sum, v1
- srl sum, sum, 16
- addu sum, v1
-
- /* odd buffer alignment? */
- beqz t7, 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 t7, zero
-
- sltiu t8, a1, 0x8
- bnez t8, small_csumcpy /* < 8 bytes to copy */
- move t2, a1
-
- beqz a1, out
- andi t7, src, 0x1 /* odd buffer? */
-
-hword_align:
- beqz t7, word_align
- andi t8, src, 0x2
-
- lbu t0, (src)
- subu a1, a1, 0x1
-#ifdef __MIPSEL__
- sll t0, t0, 8
-#endif
- ADDC(sum, t0)
- addu src, src, 0x1
- andi t8, src, 0x2
-
-word_align:
- beqz t8, dword_align
- sltiu t8, a1, 56
-
- lhu t0, (src)
- subu a1, a1, 0x2
- ADDC(sum, t0)
- sltiu t8, a1, 56
- addu 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 t0, 0x00(src)
- subu a1, a1, 0x4
- ADDC(sum, t0)
- addu src, src, 0x4
- andi t8, src, 0x8
-
-qword_align:
- beqz t8, oword_align
- andi t8, src, 0x10
-
- lw t0, 0x00(src)
- lw t1, 0x04(src)
- subu a1, a1, 0x8
- ADDC(sum, t0)
- ADDC(sum, t1)
- addu src, src, 0x8
- andi t8, src, 0x10
-
-oword_align:
- beqz t8, begin_movement
- srl t8, a1, 0x7
-
- lw t3, 0x08(src)
- lw t4, 0x0c(src)
- lw t0, 0x00(src)
- lw t1, 0x04(src)
- ADDC(sum, t3)
- ADDC(sum, t4)
- ADDC(sum, t0)
- ADDC(sum, t1)
- subu a1, a1, 0x10
- addu src, src, 0x10
- srl t8, a1, 0x7
-
-begin_movement:
- beqz t8, 1f
- andi t2, a1, 0x40
-
-move_128bytes:
- CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
- CSUM_BIGCHUNK(src, 0x20, sum, t0, t1, t3, t4)
- CSUM_BIGCHUNK(src, 0x40, sum, t0, t1, t3, t4)
- CSUM_BIGCHUNK(src, 0x60, sum, t0, t1, t3, t4)
- subu t8, t8, 0x01
- bnez t8, move_128bytes
- addu src, src, 0x80
-
-1:
- beqz t2, 1f
- andi t2, a1, 0x20
-
-move_64bytes:
- CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
- CSUM_BIGCHUNK(src, 0x20, sum, t0, t1, t3, t4)
- addu src, src, 0x40
-
-1:
- beqz t2, do_end_words
- andi t8, a1, 0x1c
-
-move_32bytes:
- CSUM_BIGCHUNK(src, 0x00, sum, t0, t1, t3, t4)
- andi t8, a1, 0x1c
- addu src, src, 0x20
-
-do_end_words:
- beqz t8, maybe_end_cruft
- srl t8, t8, 0x2
-
-end_words:
- lw t0, (src)
- subu t8, t8, 0x1
- ADDC(sum, t0)
- bnez t8, end_words
- addu src, src, 0x4
-
-maybe_end_cruft:
- andi t2, a1, 0x3
-
-small_memcpy:
- j small_csumcpy; move a1, t2
- beqz t2, out
- move a1, t2
-
-end_bytes:
- lb t0, (src)
- subu a1, a1, 0x1
- bnez a2, end_bytes
- addu src, src, 0x1
-
-out:
- jr ra
- move v0, sum
- END(csum_partial)