568 lines
14 KiB
C
568 lines
14 KiB
C
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#ifndef _ASM_X86_XOR_32_H
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#define _ASM_X86_XOR_32_H
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/*
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* Optimized RAID-5 checksumming functions for MMX.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* You should have received a copy of the GNU General Public License
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* (for example /usr/src/linux/COPYING); if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* High-speed RAID5 checksumming functions utilizing MMX instructions.
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* Copyright (C) 1998 Ingo Molnar.
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*/
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#define LD(x, y) " movq 8*("#x")(%1), %%mm"#y" ;\n"
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#define ST(x, y) " movq %%mm"#y", 8*("#x")(%1) ;\n"
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#define XO1(x, y) " pxor 8*("#x")(%2), %%mm"#y" ;\n"
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#define XO2(x, y) " pxor 8*("#x")(%3), %%mm"#y" ;\n"
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#define XO3(x, y) " pxor 8*("#x")(%4), %%mm"#y" ;\n"
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#define XO4(x, y) " pxor 8*("#x")(%5), %%mm"#y" ;\n"
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#include <asm/fpu/api.h>
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static void
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xor_pII_mmx_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
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{
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unsigned long lines = bytes >> 7;
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kernel_fpu_begin();
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asm volatile(
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#undef BLOCK
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#define BLOCK(i) \
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LD(i, 0) \
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LD(i + 1, 1) \
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LD(i + 2, 2) \
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LD(i + 3, 3) \
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XO1(i, 0) \
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ST(i, 0) \
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XO1(i+1, 1) \
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ST(i+1, 1) \
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XO1(i + 2, 2) \
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ST(i + 2, 2) \
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XO1(i + 3, 3) \
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ST(i + 3, 3)
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" .align 32 ;\n"
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" 1: ;\n"
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BLOCK(0)
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BLOCK(4)
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BLOCK(8)
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BLOCK(12)
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" addl $128, %1 ;\n"
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" addl $128, %2 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2)
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:
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: "memory");
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kernel_fpu_end();
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}
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static void
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xor_pII_mmx_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3)
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{
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unsigned long lines = bytes >> 7;
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kernel_fpu_begin();
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asm volatile(
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#undef BLOCK
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#define BLOCK(i) \
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LD(i, 0) \
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LD(i + 1, 1) \
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LD(i + 2, 2) \
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LD(i + 3, 3) \
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XO1(i, 0) \
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XO1(i + 1, 1) \
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XO1(i + 2, 2) \
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XO1(i + 3, 3) \
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XO2(i, 0) \
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ST(i, 0) \
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XO2(i + 1, 1) \
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ST(i + 1, 1) \
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XO2(i + 2, 2) \
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ST(i + 2, 2) \
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XO2(i + 3, 3) \
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ST(i + 3, 3)
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" .align 32 ;\n"
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" 1: ;\n"
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BLOCK(0)
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BLOCK(4)
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BLOCK(8)
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BLOCK(12)
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" addl $128, %1 ;\n"
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" addl $128, %2 ;\n"
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" addl $128, %3 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2), "+r" (p3)
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:
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: "memory");
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kernel_fpu_end();
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}
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static void
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xor_pII_mmx_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4)
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{
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unsigned long lines = bytes >> 7;
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kernel_fpu_begin();
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asm volatile(
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#undef BLOCK
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#define BLOCK(i) \
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LD(i, 0) \
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LD(i + 1, 1) \
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LD(i + 2, 2) \
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LD(i + 3, 3) \
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XO1(i, 0) \
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XO1(i + 1, 1) \
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XO1(i + 2, 2) \
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XO1(i + 3, 3) \
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XO2(i, 0) \
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XO2(i + 1, 1) \
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XO2(i + 2, 2) \
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XO2(i + 3, 3) \
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XO3(i, 0) \
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ST(i, 0) \
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XO3(i + 1, 1) \
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ST(i + 1, 1) \
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XO3(i + 2, 2) \
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ST(i + 2, 2) \
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XO3(i + 3, 3) \
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ST(i + 3, 3)
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" .align 32 ;\n"
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" 1: ;\n"
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BLOCK(0)
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BLOCK(4)
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BLOCK(8)
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BLOCK(12)
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" addl $128, %1 ;\n"
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" addl $128, %2 ;\n"
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" addl $128, %3 ;\n"
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" addl $128, %4 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4)
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:
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: "memory");
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kernel_fpu_end();
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}
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static void
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xor_pII_mmx_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4, unsigned long *p5)
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{
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unsigned long lines = bytes >> 7;
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kernel_fpu_begin();
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/* Make sure GCC forgets anything it knows about p4 or p5,
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such that it won't pass to the asm volatile below a
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register that is shared with any other variable. That's
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because we modify p4 and p5 there, but we can't mark them
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as read/write, otherwise we'd overflow the 10-asm-operands
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limit of GCC < 3.1. */
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asm("" : "+r" (p4), "+r" (p5));
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asm volatile(
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#undef BLOCK
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#define BLOCK(i) \
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LD(i, 0) \
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LD(i + 1, 1) \
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LD(i + 2, 2) \
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LD(i + 3, 3) \
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XO1(i, 0) \
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XO1(i + 1, 1) \
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XO1(i + 2, 2) \
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XO1(i + 3, 3) \
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XO2(i, 0) \
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XO2(i + 1, 1) \
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XO2(i + 2, 2) \
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XO2(i + 3, 3) \
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XO3(i, 0) \
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XO3(i + 1, 1) \
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XO3(i + 2, 2) \
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XO3(i + 3, 3) \
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XO4(i, 0) \
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ST(i, 0) \
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XO4(i + 1, 1) \
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ST(i + 1, 1) \
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XO4(i + 2, 2) \
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ST(i + 2, 2) \
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XO4(i + 3, 3) \
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ST(i + 3, 3)
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" .align 32 ;\n"
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" 1: ;\n"
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BLOCK(0)
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BLOCK(4)
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BLOCK(8)
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BLOCK(12)
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" addl $128, %1 ;\n"
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" addl $128, %2 ;\n"
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" addl $128, %3 ;\n"
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" addl $128, %4 ;\n"
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" addl $128, %5 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2), "+r" (p3)
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: "r" (p4), "r" (p5)
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: "memory");
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/* p4 and p5 were modified, and now the variables are dead.
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Clobber them just to be sure nobody does something stupid
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like assuming they have some legal value. */
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asm("" : "=r" (p4), "=r" (p5));
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kernel_fpu_end();
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}
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#undef LD
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#undef XO1
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#undef XO2
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#undef XO3
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#undef XO4
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#undef ST
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#undef BLOCK
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static void
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xor_p5_mmx_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
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{
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unsigned long lines = bytes >> 6;
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kernel_fpu_begin();
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asm volatile(
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" .align 32 ;\n"
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" 1: ;\n"
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" movq (%1), %%mm0 ;\n"
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" movq 8(%1), %%mm1 ;\n"
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" pxor (%2), %%mm0 ;\n"
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" movq 16(%1), %%mm2 ;\n"
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" movq %%mm0, (%1) ;\n"
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" pxor 8(%2), %%mm1 ;\n"
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" movq 24(%1), %%mm3 ;\n"
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" movq %%mm1, 8(%1) ;\n"
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" pxor 16(%2), %%mm2 ;\n"
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" movq 32(%1), %%mm4 ;\n"
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" movq %%mm2, 16(%1) ;\n"
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" pxor 24(%2), %%mm3 ;\n"
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" movq 40(%1), %%mm5 ;\n"
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" movq %%mm3, 24(%1) ;\n"
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" pxor 32(%2), %%mm4 ;\n"
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" movq 48(%1), %%mm6 ;\n"
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" movq %%mm4, 32(%1) ;\n"
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" pxor 40(%2), %%mm5 ;\n"
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" movq 56(%1), %%mm7 ;\n"
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" movq %%mm5, 40(%1) ;\n"
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" pxor 48(%2), %%mm6 ;\n"
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" pxor 56(%2), %%mm7 ;\n"
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" movq %%mm6, 48(%1) ;\n"
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" movq %%mm7, 56(%1) ;\n"
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" addl $64, %1 ;\n"
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" addl $64, %2 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2)
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:
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: "memory");
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kernel_fpu_end();
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}
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static void
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xor_p5_mmx_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3)
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{
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unsigned long lines = bytes >> 6;
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kernel_fpu_begin();
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asm volatile(
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" .align 32,0x90 ;\n"
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" 1: ;\n"
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" movq (%1), %%mm0 ;\n"
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" movq 8(%1), %%mm1 ;\n"
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" pxor (%2), %%mm0 ;\n"
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" movq 16(%1), %%mm2 ;\n"
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" pxor 8(%2), %%mm1 ;\n"
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" pxor (%3), %%mm0 ;\n"
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" pxor 16(%2), %%mm2 ;\n"
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" movq %%mm0, (%1) ;\n"
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" pxor 8(%3), %%mm1 ;\n"
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" pxor 16(%3), %%mm2 ;\n"
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" movq 24(%1), %%mm3 ;\n"
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" movq %%mm1, 8(%1) ;\n"
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" movq 32(%1), %%mm4 ;\n"
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" movq 40(%1), %%mm5 ;\n"
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" pxor 24(%2), %%mm3 ;\n"
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" movq %%mm2, 16(%1) ;\n"
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" pxor 32(%2), %%mm4 ;\n"
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" pxor 24(%3), %%mm3 ;\n"
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" pxor 40(%2), %%mm5 ;\n"
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" movq %%mm3, 24(%1) ;\n"
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" pxor 32(%3), %%mm4 ;\n"
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" pxor 40(%3), %%mm5 ;\n"
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" movq 48(%1), %%mm6 ;\n"
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" movq %%mm4, 32(%1) ;\n"
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" movq 56(%1), %%mm7 ;\n"
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" pxor 48(%2), %%mm6 ;\n"
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" movq %%mm5, 40(%1) ;\n"
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" pxor 56(%2), %%mm7 ;\n"
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" pxor 48(%3), %%mm6 ;\n"
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" pxor 56(%3), %%mm7 ;\n"
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" movq %%mm6, 48(%1) ;\n"
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" movq %%mm7, 56(%1) ;\n"
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" addl $64, %1 ;\n"
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" addl $64, %2 ;\n"
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" addl $64, %3 ;\n"
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" decl %0 ;\n"
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" jnz 1b ;\n"
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: "+r" (lines),
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"+r" (p1), "+r" (p2), "+r" (p3)
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:
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: "memory" );
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kernel_fpu_end();
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}
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static void
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xor_p5_mmx_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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|
|
unsigned long *p3, unsigned long *p4)
|
||
|
|
{
|
||
|
|
unsigned long lines = bytes >> 6;
|
||
|
|
|
||
|
|
kernel_fpu_begin();
|
||
|
|
|
||
|
|
asm volatile(
|
||
|
|
" .align 32,0x90 ;\n"
|
||
|
|
" 1: ;\n"
|
||
|
|
" movq (%1), %%mm0 ;\n"
|
||
|
|
" movq 8(%1), %%mm1 ;\n"
|
||
|
|
" pxor (%2), %%mm0 ;\n"
|
||
|
|
" movq 16(%1), %%mm2 ;\n"
|
||
|
|
" pxor 8(%2), %%mm1 ;\n"
|
||
|
|
" pxor (%3), %%mm0 ;\n"
|
||
|
|
" pxor 16(%2), %%mm2 ;\n"
|
||
|
|
" pxor 8(%3), %%mm1 ;\n"
|
||
|
|
" pxor (%4), %%mm0 ;\n"
|
||
|
|
" movq 24(%1), %%mm3 ;\n"
|
||
|
|
" pxor 16(%3), %%mm2 ;\n"
|
||
|
|
" pxor 8(%4), %%mm1 ;\n"
|
||
|
|
" movq %%mm0, (%1) ;\n"
|
||
|
|
" movq 32(%1), %%mm4 ;\n"
|
||
|
|
" pxor 24(%2), %%mm3 ;\n"
|
||
|
|
" pxor 16(%4), %%mm2 ;\n"
|
||
|
|
" movq %%mm1, 8(%1) ;\n"
|
||
|
|
" movq 40(%1), %%mm5 ;\n"
|
||
|
|
" pxor 32(%2), %%mm4 ;\n"
|
||
|
|
" pxor 24(%3), %%mm3 ;\n"
|
||
|
|
" movq %%mm2, 16(%1) ;\n"
|
||
|
|
" pxor 40(%2), %%mm5 ;\n"
|
||
|
|
" pxor 32(%3), %%mm4 ;\n"
|
||
|
|
" pxor 24(%4), %%mm3 ;\n"
|
||
|
|
" movq %%mm3, 24(%1) ;\n"
|
||
|
|
" movq 56(%1), %%mm7 ;\n"
|
||
|
|
" movq 48(%1), %%mm6 ;\n"
|
||
|
|
" pxor 40(%3), %%mm5 ;\n"
|
||
|
|
" pxor 32(%4), %%mm4 ;\n"
|
||
|
|
" pxor 48(%2), %%mm6 ;\n"
|
||
|
|
" movq %%mm4, 32(%1) ;\n"
|
||
|
|
" pxor 56(%2), %%mm7 ;\n"
|
||
|
|
" pxor 40(%4), %%mm5 ;\n"
|
||
|
|
" pxor 48(%3), %%mm6 ;\n"
|
||
|
|
" pxor 56(%3), %%mm7 ;\n"
|
||
|
|
" movq %%mm5, 40(%1) ;\n"
|
||
|
|
" pxor 48(%4), %%mm6 ;\n"
|
||
|
|
" pxor 56(%4), %%mm7 ;\n"
|
||
|
|
" movq %%mm6, 48(%1) ;\n"
|
||
|
|
" movq %%mm7, 56(%1) ;\n"
|
||
|
|
|
||
|
|
" addl $64, %1 ;\n"
|
||
|
|
" addl $64, %2 ;\n"
|
||
|
|
" addl $64, %3 ;\n"
|
||
|
|
" addl $64, %4 ;\n"
|
||
|
|
" decl %0 ;\n"
|
||
|
|
" jnz 1b ;\n"
|
||
|
|
: "+r" (lines),
|
||
|
|
"+r" (p1), "+r" (p2), "+r" (p3), "+r" (p4)
|
||
|
|
:
|
||
|
|
: "memory");
|
||
|
|
|
||
|
|
kernel_fpu_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
xor_p5_mmx_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
|
||
|
|
unsigned long *p3, unsigned long *p4, unsigned long *p5)
|
||
|
|
{
|
||
|
|
unsigned long lines = bytes >> 6;
|
||
|
|
|
||
|
|
kernel_fpu_begin();
|
||
|
|
|
||
|
|
/* Make sure GCC forgets anything it knows about p4 or p5,
|
||
|
|
such that it won't pass to the asm volatile below a
|
||
|
|
register that is shared with any other variable. That's
|
||
|
|
because we modify p4 and p5 there, but we can't mark them
|
||
|
|
as read/write, otherwise we'd overflow the 10-asm-operands
|
||
|
|
limit of GCC < 3.1. */
|
||
|
|
asm("" : "+r" (p4), "+r" (p5));
|
||
|
|
|
||
|
|
asm volatile(
|
||
|
|
" .align 32,0x90 ;\n"
|
||
|
|
" 1: ;\n"
|
||
|
|
" movq (%1), %%mm0 ;\n"
|
||
|
|
" movq 8(%1), %%mm1 ;\n"
|
||
|
|
" pxor (%2), %%mm0 ;\n"
|
||
|
|
" pxor 8(%2), %%mm1 ;\n"
|
||
|
|
" movq 16(%1), %%mm2 ;\n"
|
||
|
|
" pxor (%3), %%mm0 ;\n"
|
||
|
|
" pxor 8(%3), %%mm1 ;\n"
|
||
|
|
" pxor 16(%2), %%mm2 ;\n"
|
||
|
|
" pxor (%4), %%mm0 ;\n"
|
||
|
|
" pxor 8(%4), %%mm1 ;\n"
|
||
|
|
" pxor 16(%3), %%mm2 ;\n"
|
||
|
|
" movq 24(%1), %%mm3 ;\n"
|
||
|
|
" pxor (%5), %%mm0 ;\n"
|
||
|
|
" pxor 8(%5), %%mm1 ;\n"
|
||
|
|
" movq %%mm0, (%1) ;\n"
|
||
|
|
" pxor 16(%4), %%mm2 ;\n"
|
||
|
|
" pxor 24(%2), %%mm3 ;\n"
|
||
|
|
" movq %%mm1, 8(%1) ;\n"
|
||
|
|
" pxor 16(%5), %%mm2 ;\n"
|
||
|
|
" pxor 24(%3), %%mm3 ;\n"
|
||
|
|
" movq 32(%1), %%mm4 ;\n"
|
||
|
|
" movq %%mm2, 16(%1) ;\n"
|
||
|
|
" pxor 24(%4), %%mm3 ;\n"
|
||
|
|
" pxor 32(%2), %%mm4 ;\n"
|
||
|
|
" movq 40(%1), %%mm5 ;\n"
|
||
|
|
" pxor 24(%5), %%mm3 ;\n"
|
||
|
|
" pxor 32(%3), %%mm4 ;\n"
|
||
|
|
" pxor 40(%2), %%mm5 ;\n"
|
||
|
|
" movq %%mm3, 24(%1) ;\n"
|
||
|
|
" pxor 32(%4), %%mm4 ;\n"
|
||
|
|
" pxor 40(%3), %%mm5 ;\n"
|
||
|
|
" movq 48(%1), %%mm6 ;\n"
|
||
|
|
" movq 56(%1), %%mm7 ;\n"
|
||
|
|
" pxor 32(%5), %%mm4 ;\n"
|
||
|
|
" pxor 40(%4), %%mm5 ;\n"
|
||
|
|
" pxor 48(%2), %%mm6 ;\n"
|
||
|
|
" pxor 56(%2), %%mm7 ;\n"
|
||
|
|
" movq %%mm4, 32(%1) ;\n"
|
||
|
|
" pxor 48(%3), %%mm6 ;\n"
|
||
|
|
" pxor 56(%3), %%mm7 ;\n"
|
||
|
|
" pxor 40(%5), %%mm5 ;\n"
|
||
|
|
" pxor 48(%4), %%mm6 ;\n"
|
||
|
|
" pxor 56(%4), %%mm7 ;\n"
|
||
|
|
" movq %%mm5, 40(%1) ;\n"
|
||
|
|
" pxor 48(%5), %%mm6 ;\n"
|
||
|
|
" pxor 56(%5), %%mm7 ;\n"
|
||
|
|
" movq %%mm6, 48(%1) ;\n"
|
||
|
|
" movq %%mm7, 56(%1) ;\n"
|
||
|
|
|
||
|
|
" addl $64, %1 ;\n"
|
||
|
|
" addl $64, %2 ;\n"
|
||
|
|
" addl $64, %3 ;\n"
|
||
|
|
" addl $64, %4 ;\n"
|
||
|
|
" addl $64, %5 ;\n"
|
||
|
|
" decl %0 ;\n"
|
||
|
|
" jnz 1b ;\n"
|
||
|
|
: "+r" (lines),
|
||
|
|
"+r" (p1), "+r" (p2), "+r" (p3)
|
||
|
|
: "r" (p4), "r" (p5)
|
||
|
|
: "memory");
|
||
|
|
|
||
|
|
/* p4 and p5 were modified, and now the variables are dead.
|
||
|
|
Clobber them just to be sure nobody does something stupid
|
||
|
|
like assuming they have some legal value. */
|
||
|
|
asm("" : "=r" (p4), "=r" (p5));
|
||
|
|
|
||
|
|
kernel_fpu_end();
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct xor_block_template xor_block_pII_mmx = {
|
||
|
|
.name = "pII_mmx",
|
||
|
|
.do_2 = xor_pII_mmx_2,
|
||
|
|
.do_3 = xor_pII_mmx_3,
|
||
|
|
.do_4 = xor_pII_mmx_4,
|
||
|
|
.do_5 = xor_pII_mmx_5,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct xor_block_template xor_block_p5_mmx = {
|
||
|
|
.name = "p5_mmx",
|
||
|
|
.do_2 = xor_p5_mmx_2,
|
||
|
|
.do_3 = xor_p5_mmx_3,
|
||
|
|
.do_4 = xor_p5_mmx_4,
|
||
|
|
.do_5 = xor_p5_mmx_5,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct xor_block_template xor_block_pIII_sse = {
|
||
|
|
.name = "pIII_sse",
|
||
|
|
.do_2 = xor_sse_2,
|
||
|
|
.do_3 = xor_sse_3,
|
||
|
|
.do_4 = xor_sse_4,
|
||
|
|
.do_5 = xor_sse_5,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Also try the AVX routines */
|
||
|
|
#include <asm/xor_avx.h>
|
||
|
|
|
||
|
|
/* Also try the generic routines. */
|
||
|
|
#include <asm-generic/xor.h>
|
||
|
|
|
||
|
|
/* We force the use of the SSE xor block because it can write around L2.
|
||
|
|
We may also be able to load into the L1 only depending on how the cpu
|
||
|
|
deals with a load to a line that is being prefetched. */
|
||
|
|
#undef XOR_TRY_TEMPLATES
|
||
|
|
#define XOR_TRY_TEMPLATES \
|
||
|
|
do { \
|
||
|
|
AVX_XOR_SPEED; \
|
||
|
|
if (boot_cpu_has(X86_FEATURE_XMM)) { \
|
||
|
|
xor_speed(&xor_block_pIII_sse); \
|
||
|
|
xor_speed(&xor_block_sse_pf64); \
|
||
|
|
} else if (boot_cpu_has(X86_FEATURE_MMX)) { \
|
||
|
|
xor_speed(&xor_block_pII_mmx); \
|
||
|
|
xor_speed(&xor_block_p5_mmx); \
|
||
|
|
} else { \
|
||
|
|
xor_speed(&xor_block_8regs); \
|
||
|
|
xor_speed(&xor_block_8regs_p); \
|
||
|
|
xor_speed(&xor_block_32regs); \
|
||
|
|
xor_speed(&xor_block_32regs_p); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#endif /* _ASM_X86_XOR_32_H */
|