| /* |
| * Intel SHA Extensions optimized implementation of a SHA-1 update function |
| * |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2015 Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * 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. |
| * |
| * Contact Information: |
| * Sean Gulley <sean.m.gulley@intel.com> |
| * Tim Chen <tim.c.chen@linux.intel.com> |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2015 Intel Corporation. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <linux/linkage.h> |
| |
| #define DIGEST_PTR %rdi /* 1st arg */ |
| #define DATA_PTR %rsi /* 2nd arg */ |
| #define NUM_BLKS %rdx /* 3rd arg */ |
| |
| #define RSPSAVE %rax |
| |
| /* gcc conversion */ |
| #define FRAME_SIZE 32 /* space for 2x16 bytes */ |
| |
| #define ABCD %xmm0 |
| #define E0 %xmm1 /* Need two E's b/c they ping pong */ |
| #define E1 %xmm2 |
| #define MSG0 %xmm3 |
| #define MSG1 %xmm4 |
| #define MSG2 %xmm5 |
| #define MSG3 %xmm6 |
| #define SHUF_MASK %xmm7 |
| |
| |
| /* |
| * Intel SHA Extensions optimized implementation of a SHA-1 update function |
| * |
| * The function takes a pointer to the current hash values, a pointer to the |
| * input data, and a number of 64 byte blocks to process. Once all blocks have |
| * been processed, the digest pointer is updated with the resulting hash value. |
| * The function only processes complete blocks, there is no functionality to |
| * store partial blocks. All message padding and hash value initialization must |
| * be done outside the update function. |
| * |
| * The indented lines in the loop are instructions related to rounds processing. |
| * The non-indented lines are instructions related to the message schedule. |
| * |
| * void sha1_ni_transform(uint32_t *digest, const void *data, |
| uint32_t numBlocks) |
| * digest : pointer to digest |
| * data: pointer to input data |
| * numBlocks: Number of blocks to process |
| */ |
| .text |
| .align 32 |
| ENTRY(sha1_ni_transform) |
| mov %rsp, RSPSAVE |
| sub $FRAME_SIZE, %rsp |
| and $~0xF, %rsp |
| |
| shl $6, NUM_BLKS /* convert to bytes */ |
| jz .Ldone_hash |
| add DATA_PTR, NUM_BLKS /* pointer to end of data */ |
| |
| /* load initial hash values */ |
| pinsrd $3, 1*16(DIGEST_PTR), E0 |
| movdqu 0*16(DIGEST_PTR), ABCD |
| pand UPPER_WORD_MASK(%rip), E0 |
| pshufd $0x1B, ABCD, ABCD |
| |
| movdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK |
| |
| .Lloop0: |
| /* Save hash values for addition after rounds */ |
| movdqa E0, (0*16)(%rsp) |
| movdqa ABCD, (1*16)(%rsp) |
| |
| /* Rounds 0-3 */ |
| movdqu 0*16(DATA_PTR), MSG0 |
| pshufb SHUF_MASK, MSG0 |
| paddd MSG0, E0 |
| movdqa ABCD, E1 |
| sha1rnds4 $0, E0, ABCD |
| |
| /* Rounds 4-7 */ |
| movdqu 1*16(DATA_PTR), MSG1 |
| pshufb SHUF_MASK, MSG1 |
| sha1nexte MSG1, E1 |
| movdqa ABCD, E0 |
| sha1rnds4 $0, E1, ABCD |
| sha1msg1 MSG1, MSG0 |
| |
| /* Rounds 8-11 */ |
| movdqu 2*16(DATA_PTR), MSG2 |
| pshufb SHUF_MASK, MSG2 |
| sha1nexte MSG2, E0 |
| movdqa ABCD, E1 |
| sha1rnds4 $0, E0, ABCD |
| sha1msg1 MSG2, MSG1 |
| pxor MSG2, MSG0 |
| |
| /* Rounds 12-15 */ |
| movdqu 3*16(DATA_PTR), MSG3 |
| pshufb SHUF_MASK, MSG3 |
| sha1nexte MSG3, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG3, MSG0 |
| sha1rnds4 $0, E1, ABCD |
| sha1msg1 MSG3, MSG2 |
| pxor MSG3, MSG1 |
| |
| /* Rounds 16-19 */ |
| sha1nexte MSG0, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG0, MSG1 |
| sha1rnds4 $0, E0, ABCD |
| sha1msg1 MSG0, MSG3 |
| pxor MSG0, MSG2 |
| |
| /* Rounds 20-23 */ |
| sha1nexte MSG1, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG1, MSG2 |
| sha1rnds4 $1, E1, ABCD |
| sha1msg1 MSG1, MSG0 |
| pxor MSG1, MSG3 |
| |
| /* Rounds 24-27 */ |
| sha1nexte MSG2, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG2, MSG3 |
| sha1rnds4 $1, E0, ABCD |
| sha1msg1 MSG2, MSG1 |
| pxor MSG2, MSG0 |
| |
| /* Rounds 28-31 */ |
| sha1nexte MSG3, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG3, MSG0 |
| sha1rnds4 $1, E1, ABCD |
| sha1msg1 MSG3, MSG2 |
| pxor MSG3, MSG1 |
| |
| /* Rounds 32-35 */ |
| sha1nexte MSG0, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG0, MSG1 |
| sha1rnds4 $1, E0, ABCD |
| sha1msg1 MSG0, MSG3 |
| pxor MSG0, MSG2 |
| |
| /* Rounds 36-39 */ |
| sha1nexte MSG1, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG1, MSG2 |
| sha1rnds4 $1, E1, ABCD |
| sha1msg1 MSG1, MSG0 |
| pxor MSG1, MSG3 |
| |
| /* Rounds 40-43 */ |
| sha1nexte MSG2, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG2, MSG3 |
| sha1rnds4 $2, E0, ABCD |
| sha1msg1 MSG2, MSG1 |
| pxor MSG2, MSG0 |
| |
| /* Rounds 44-47 */ |
| sha1nexte MSG3, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG3, MSG0 |
| sha1rnds4 $2, E1, ABCD |
| sha1msg1 MSG3, MSG2 |
| pxor MSG3, MSG1 |
| |
| /* Rounds 48-51 */ |
| sha1nexte MSG0, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG0, MSG1 |
| sha1rnds4 $2, E0, ABCD |
| sha1msg1 MSG0, MSG3 |
| pxor MSG0, MSG2 |
| |
| /* Rounds 52-55 */ |
| sha1nexte MSG1, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG1, MSG2 |
| sha1rnds4 $2, E1, ABCD |
| sha1msg1 MSG1, MSG0 |
| pxor MSG1, MSG3 |
| |
| /* Rounds 56-59 */ |
| sha1nexte MSG2, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG2, MSG3 |
| sha1rnds4 $2, E0, ABCD |
| sha1msg1 MSG2, MSG1 |
| pxor MSG2, MSG0 |
| |
| /* Rounds 60-63 */ |
| sha1nexte MSG3, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG3, MSG0 |
| sha1rnds4 $3, E1, ABCD |
| sha1msg1 MSG3, MSG2 |
| pxor MSG3, MSG1 |
| |
| /* Rounds 64-67 */ |
| sha1nexte MSG0, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG0, MSG1 |
| sha1rnds4 $3, E0, ABCD |
| sha1msg1 MSG0, MSG3 |
| pxor MSG0, MSG2 |
| |
| /* Rounds 68-71 */ |
| sha1nexte MSG1, E1 |
| movdqa ABCD, E0 |
| sha1msg2 MSG1, MSG2 |
| sha1rnds4 $3, E1, ABCD |
| pxor MSG1, MSG3 |
| |
| /* Rounds 72-75 */ |
| sha1nexte MSG2, E0 |
| movdqa ABCD, E1 |
| sha1msg2 MSG2, MSG3 |
| sha1rnds4 $3, E0, ABCD |
| |
| /* Rounds 76-79 */ |
| sha1nexte MSG3, E1 |
| movdqa ABCD, E0 |
| sha1rnds4 $3, E1, ABCD |
| |
| /* Add current hash values with previously saved */ |
| sha1nexte (0*16)(%rsp), E0 |
| paddd (1*16)(%rsp), ABCD |
| |
| /* Increment data pointer and loop if more to process */ |
| add $64, DATA_PTR |
| cmp NUM_BLKS, DATA_PTR |
| jne .Lloop0 |
| |
| /* Write hash values back in the correct order */ |
| pshufd $0x1B, ABCD, ABCD |
| movdqu ABCD, 0*16(DIGEST_PTR) |
| pextrd $3, E0, 1*16(DIGEST_PTR) |
| |
| .Ldone_hash: |
| mov RSPSAVE, %rsp |
| |
| ret |
| ENDPROC(sha1_ni_transform) |
| |
| .section .rodata.cst16.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 16 |
| .align 16 |
| PSHUFFLE_BYTE_FLIP_MASK: |
| .octa 0x000102030405060708090a0b0c0d0e0f |
| |
| .section .rodata.cst16.UPPER_WORD_MASK, "aM", @progbits, 16 |
| .align 16 |
| UPPER_WORD_MASK: |
| .octa 0xFFFFFFFF000000000000000000000000 |
