cregit-Linux how code gets into the kernel

Release 4.8 lib/raid6/recov_ssse3.c

Directory: lib/raid6
/*
 * Copyright (C) 2012 Intel Corporation
 *
 * 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; version 2
 * of the License.
 */

#ifdef CONFIG_AS_SSSE3

#include <linux/raid/pq.h>
#include "x86.h"


static int raid6_has_ssse3(void) { return boot_cpu_has(X86_FEATURE_XMM) && boot_cpu_has(X86_FEATURE_XMM2) && boot_cpu_has(X86_FEATURE_SSSE3); }

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jim kukunasjim kukunas24100.00%1100.00%
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static void raid6_2data_recov_ssse3(int disks, size_t bytes, int faila, int failb, void **ptrs) { u8 *p, *q, *dp, *dq; const u8 *pbmul; /* P multiplier table for B data */ const u8 *qmul; /* Q multiplier table (for both) */ static const u8 __aligned(16) x0f[16] = { 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f}; p = (u8 *)ptrs[disks-2]; q = (u8 *)ptrs[disks-1]; /* Compute syndrome with zero for the missing data pages Use the dead data pages as temporary storage for delta p and delta q */ dp = (u8 *)ptrs[faila]; ptrs[faila] = (void *)raid6_empty_zero_page; ptrs[disks-2] = dp; dq = (u8 *)ptrs[failb]; ptrs[failb] = (void *)raid6_empty_zero_page; ptrs[disks-1] = dq; raid6_call.gen_syndrome(disks, bytes, ptrs); /* Restore pointer table */ ptrs[faila] = dp; ptrs[failb] = dq; ptrs[disks-2] = p; ptrs[disks-1] = q; /* Now, pick the proper data tables */ pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]]; qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^ raid6_gfexp[failb]]]; kernel_fpu_begin(); asm volatile("movdqa %0,%%xmm7" : : "m" (x0f[0])); #ifdef CONFIG_X86_64 asm volatile("movdqa %0,%%xmm6" : : "m" (qmul[0])); asm volatile("movdqa %0,%%xmm14" : : "m" (pbmul[0])); asm volatile("movdqa %0,%%xmm15" : : "m" (pbmul[16])); #endif /* Now do it... */ while (bytes) { #ifdef CONFIG_X86_64 /* xmm6, xmm14, xmm15 */ asm volatile("movdqa %0,%%xmm1" : : "m" (q[0])); asm volatile("movdqa %0,%%xmm9" : : "m" (q[16])); asm volatile("movdqa %0,%%xmm0" : : "m" (p[0])); asm volatile("movdqa %0,%%xmm8" : : "m" (p[16])); asm volatile("pxor %0,%%xmm1" : : "m" (dq[0])); asm volatile("pxor %0,%%xmm9" : : "m" (dq[16])); asm volatile("pxor %0,%%xmm0" : : "m" (dp[0])); asm volatile("pxor %0,%%xmm8" : : "m" (dp[16])); /* xmm0/8 = px */ asm volatile("movdqa %xmm6,%xmm4"); asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16])); asm volatile("movdqa %xmm6,%xmm12"); asm volatile("movdqa %xmm5,%xmm13"); asm volatile("movdqa %xmm1,%xmm3"); asm volatile("movdqa %xmm9,%xmm11"); asm volatile("movdqa %xmm0,%xmm2"); /* xmm2/10 = px */ asm volatile("movdqa %xmm8,%xmm10"); asm volatile("psraw $4,%xmm1"); asm volatile("psraw $4,%xmm9"); asm volatile("pand %xmm7,%xmm3"); asm volatile("pand %xmm7,%xmm11"); asm volatile("pand %xmm7,%xmm1"); asm volatile("pand %xmm7,%xmm9"); asm volatile("pshufb %xmm3,%xmm4"); asm volatile("pshufb %xmm11,%xmm12"); asm volatile("pshufb %xmm1,%xmm5"); asm volatile("pshufb %xmm9,%xmm13"); asm volatile("pxor %xmm4,%xmm5"); asm volatile("pxor %xmm12,%xmm13"); /* xmm5/13 = qx */ asm volatile("movdqa %xmm14,%xmm4"); asm volatile("movdqa %xmm15,%xmm1"); asm volatile("movdqa %xmm14,%xmm12"); asm volatile("movdqa %xmm15,%xmm9"); asm volatile("movdqa %xmm2,%xmm3"); asm volatile("movdqa %xmm10,%xmm11"); asm volatile("psraw $4,%xmm2"); asm volatile("psraw $4,%xmm10"); asm volatile("pand %xmm7,%xmm3"); asm volatile("pand %xmm7,%xmm11"); asm volatile("pand %xmm7,%xmm2"); asm volatile("pand %xmm7,%xmm10"); asm volatile("pshufb %xmm3,%xmm4"); asm volatile("pshufb %xmm11,%xmm12"); asm volatile("pshufb %xmm2,%xmm1"); asm volatile("pshufb %xmm10,%xmm9"); asm volatile("pxor %xmm4,%xmm1"); asm volatile("pxor %xmm12,%xmm9"); /* xmm1/9 = pbmul[px] */ asm volatile("pxor %xmm5,%xmm1"); asm volatile("pxor %xmm13,%xmm9"); /* xmm1/9 = db = DQ */ asm volatile("movdqa %%xmm1,%0" : "=m" (dq[0])); asm volatile("movdqa %%xmm9,%0" : "=m" (dq[16])); asm volatile("pxor %xmm1,%xmm0"); asm volatile("pxor %xmm9,%xmm8"); asm volatile("movdqa %%xmm0,%0" : "=m" (dp[0])); asm volatile("movdqa %%xmm8,%0" : "=m" (dp[16])); bytes -= 32; p += 32; q += 32; dp += 32; dq += 32; #else asm volatile("movdqa %0,%%xmm1" : : "m" (*q)); asm volatile("movdqa %0,%%xmm0" : : "m" (*p)); asm volatile("pxor %0,%%xmm1" : : "m" (*dq)); asm volatile("pxor %0,%%xmm0" : : "m" (*dp)); /* 1 = dq ^ q * 0 = dp ^ p */ asm volatile("movdqa %0,%%xmm4" : : "m" (qmul[0])); asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16])); asm volatile("movdqa %xmm1,%xmm3"); asm volatile("psraw $4,%xmm1"); asm volatile("pand %xmm7,%xmm3"); asm volatile("pand %xmm7,%xmm1"); asm volatile("pshufb %xmm3,%xmm4"); asm volatile("pshufb %xmm1,%xmm5"); asm volatile("pxor %xmm4,%xmm5"); asm volatile("movdqa %xmm0,%xmm2"); /* xmm2 = px */ /* xmm5 = qx */ asm volatile("movdqa %0,%%xmm4" : : "m" (pbmul[0])); asm volatile("movdqa %0,%%xmm1" : : "m" (pbmul[16])); asm volatile("movdqa %xmm2,%xmm3"); asm volatile("psraw $4,%xmm2"); asm volatile("pand %xmm7,%xmm3"); asm volatile("pand %xmm7,%xmm2"); asm volatile("pshufb %xmm3,%xmm4"); asm volatile("pshufb %xmm2,%xmm1"); asm volatile("pxor %xmm4,%xmm1"); /* xmm1 = pbmul[px] */ asm volatile("pxor %xmm5,%xmm1"); /* xmm1 = db = DQ */ asm volatile("movdqa %%xmm1,%0" : "=m" (*dq)); asm volatile("pxor %xmm1,%xmm0"); asm volatile("movdqa %%xmm0,%0" : "=m" (*dp)); bytes -= 16; p += 16; q += 16; dp += 16; dq += 16; #endif } kernel_fpu_end(); }

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jim kukunasjim kukunas589100.00%2100.00%
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static void raid6_datap_recov_ssse3(int disks, size_t bytes, int faila, void **ptrs) { u8 *p, *q, *dq; const u8 *qmul; /* Q multiplier table */ static const u8 __aligned(16) x0f[16] = { 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f}; p = (u8 *)ptrs[disks-2]; q = (u8 *)ptrs[disks-1]; /* Compute syndrome with zero for the missing data page Use the dead data page as temporary storage for delta q */ dq = (u8 *)ptrs[faila]; ptrs[faila] = (void *)raid6_empty_zero_page; ptrs[disks-1] = dq; raid6_call.gen_syndrome(disks, bytes, ptrs); /* Restore pointer table */ ptrs[faila] = dq; ptrs[disks-1] = q; /* Now, pick the proper data tables */ qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]]; kernel_fpu_begin(); asm volatile("movdqa %0, %%xmm7" : : "m" (x0f[0])); while (bytes) { #ifdef CONFIG_X86_64 asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0])); asm volatile("movdqa %0, %%xmm4" : : "m" (dq[16])); asm volatile("pxor %0, %%xmm3" : : "m" (q[0])); asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0])); /* xmm3 = q[0] ^ dq[0] */ asm volatile("pxor %0, %%xmm4" : : "m" (q[16])); asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16])); /* xmm4 = q[16] ^ dq[16] */ asm volatile("movdqa %xmm3, %xmm6"); asm volatile("movdqa %xmm4, %xmm8"); /* xmm4 = xmm8 = q[16] ^ dq[16] */ asm volatile("psraw $4, %xmm3"); asm volatile("pand %xmm7, %xmm6"); asm volatile("pand %xmm7, %xmm3"); asm volatile("pshufb %xmm6, %xmm0"); asm volatile("pshufb %xmm3, %xmm1"); asm volatile("movdqa %0, %%xmm10" : : "m" (qmul[0])); asm volatile("pxor %xmm0, %xmm1"); asm volatile("movdqa %0, %%xmm11" : : "m" (qmul[16])); /* xmm1 = qmul[q[0] ^ dq[0]] */ asm volatile("psraw $4, %xmm4"); asm volatile("pand %xmm7, %xmm8"); asm volatile("pand %xmm7, %xmm4"); asm volatile("pshufb %xmm8, %xmm10"); asm volatile("pshufb %xmm4, %xmm11"); asm volatile("movdqa %0, %%xmm2" : : "m" (p[0])); asm volatile("pxor %xmm10, %xmm11"); asm volatile("movdqa %0, %%xmm12" : : "m" (p[16])); /* xmm11 = qmul[q[16] ^ dq[16]] */ asm volatile("pxor %xmm1, %xmm2"); /* xmm2 = p[0] ^ qmul[q[0] ^ dq[0]] */ asm volatile("pxor %xmm11, %xmm12"); /* xmm12 = p[16] ^ qmul[q[16] ^ dq[16]] */ asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0])); asm volatile("movdqa %%xmm11, %0" : "=m" (dq[16])); asm volatile("movdqa %%xmm2, %0" : "=m" (p[0])); asm volatile("movdqa %%xmm12, %0" : "=m" (p[16])); bytes -= 32; p += 32; q += 32; dq += 32; #else asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0])); asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0])); asm volatile("pxor %0, %%xmm3" : : "m" (q[0])); asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16])); /* xmm3 = *q ^ *dq */ asm volatile("movdqa %xmm3, %xmm6"); asm volatile("movdqa %0, %%xmm2" : : "m" (p[0])); asm volatile("psraw $4, %xmm3"); asm volatile("pand %xmm7, %xmm6"); asm volatile("pand %xmm7, %xmm3"); asm volatile("pshufb %xmm6, %xmm0"); asm volatile("pshufb %xmm3, %xmm1"); asm volatile("pxor %xmm0, %xmm1"); /* xmm1 = qmul[*q ^ *dq */ asm volatile("pxor %xmm1, %xmm2"); /* xmm2 = *p ^ qmul[*q ^ *dq] */ asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0])); asm volatile("movdqa %%xmm2, %0" : "=m" (p[0])); bytes -= 16; p += 16; q += 16; dq += 16; #endif } kernel_fpu_end(); }

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jim kukunasjim kukunas381100.00%2100.00%
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const struct raid6_recov_calls raid6_recov_ssse3 = { .data2 = raid6_2data_recov_ssse3, .datap = raid6_datap_recov_ssse3, .valid = raid6_has_ssse3, #ifdef CONFIG_X86_64 .name = "ssse3x2", #else .name = "ssse3x1", #endif .priority = 1, }; #else #warning "your version of binutils lacks SSSE3 support" #endif

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Directory: lib/raid6
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