| /* |
| * Intel SHA Extensions optimized implementation of a SHA-256 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> |
| #include <linux/cfi_types.h> |
| |
| #define DIGEST_PTR %rdi /* 1st arg */ |
| #define DATA_PTR %rsi /* 2nd arg */ |
| #define NUM_BLKS %rdx /* 3rd arg */ |
| |
| #define SHA256CONSTANTS %rax |
| |
| #define MSG %xmm0 /* sha256rnds2 implicit operand */ |
| #define STATE0 %xmm1 |
| #define STATE1 %xmm2 |
| #define MSG0 %xmm3 |
| #define MSG1 %xmm4 |
| #define MSG2 %xmm5 |
| #define MSG3 %xmm6 |
| #define TMP %xmm7 |
| |
| #define SHUF_MASK %xmm8 |
| |
| #define ABEF_SAVE %xmm9 |
| #define CDGH_SAVE %xmm10 |
| |
| .macro do_4rounds i, m0, m1, m2, m3 |
| .if \i < 16 |
| movdqu \i*4(DATA_PTR), \m0 |
| pshufb SHUF_MASK, \m0 |
| .endif |
| movdqa (\i-32)*4(SHA256CONSTANTS), MSG |
| paddd \m0, MSG |
| sha256rnds2 STATE0, STATE1 |
| .if \i >= 12 && \i < 60 |
| movdqa \m0, TMP |
| palignr $4, \m3, TMP |
| paddd TMP, \m1 |
| sha256msg2 \m0, \m1 |
| .endif |
| punpckhqdq MSG, MSG |
| sha256rnds2 STATE1, STATE0 |
| .if \i >= 4 && \i < 52 |
| sha256msg1 \m0, \m3 |
| .endif |
| .endm |
| |
| /* |
| * Intel SHA Extensions optimized implementation of a SHA-256 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. |
| * |
| * void sha256_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 |
| SYM_TYPED_FUNC_START(sha256_ni_transform) |
| |
| shl $6, NUM_BLKS /* convert to bytes */ |
| jz .Ldone_hash |
| add DATA_PTR, NUM_BLKS /* pointer to end of data */ |
| |
| /* |
| * load initial hash values |
| * Need to reorder these appropriately |
| * DCBA, HGFE -> ABEF, CDGH |
| */ |
| movdqu 0*16(DIGEST_PTR), STATE0 /* DCBA */ |
| movdqu 1*16(DIGEST_PTR), STATE1 /* HGFE */ |
| |
| movdqa STATE0, TMP |
| punpcklqdq STATE1, STATE0 /* FEBA */ |
| punpckhqdq TMP, STATE1 /* DCHG */ |
| pshufd $0x1B, STATE0, STATE0 /* ABEF */ |
| pshufd $0xB1, STATE1, STATE1 /* CDGH */ |
| |
| movdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK |
| lea K256+32*4(%rip), SHA256CONSTANTS |
| |
| .Lloop0: |
| /* Save hash values for addition after rounds */ |
| movdqa STATE0, ABEF_SAVE |
| movdqa STATE1, CDGH_SAVE |
| |
| .irp i, 0, 16, 32, 48 |
| do_4rounds (\i + 0), MSG0, MSG1, MSG2, MSG3 |
| do_4rounds (\i + 4), MSG1, MSG2, MSG3, MSG0 |
| do_4rounds (\i + 8), MSG2, MSG3, MSG0, MSG1 |
| do_4rounds (\i + 12), MSG3, MSG0, MSG1, MSG2 |
| .endr |
| |
| /* Add current hash values with previously saved */ |
| paddd ABEF_SAVE, STATE0 |
| paddd CDGH_SAVE, STATE1 |
| |
| /* 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 */ |
| movdqa STATE0, TMP |
| punpcklqdq STATE1, STATE0 /* GHEF */ |
| punpckhqdq TMP, STATE1 /* ABCD */ |
| pshufd $0xB1, STATE0, STATE0 /* HGFE */ |
| pshufd $0x1B, STATE1, STATE1 /* DCBA */ |
| |
| movdqu STATE1, 0*16(DIGEST_PTR) |
| movdqu STATE0, 1*16(DIGEST_PTR) |
| |
| .Ldone_hash: |
| |
| RET |
| SYM_FUNC_END(sha256_ni_transform) |
| |
| .section .rodata.cst256.K256, "aM", @progbits, 256 |
| .align 64 |
| K256: |
| .long 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5 |
| .long 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5 |
| .long 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3 |
| .long 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174 |
| .long 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc |
| .long 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da |
| .long 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7 |
| .long 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967 |
| .long 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13 |
| .long 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85 |
| .long 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3 |
| .long 0xd192e819,0xd6990624,0xf40e3585,0x106aa070 |
| .long 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5 |
| .long 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3 |
| .long 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208 |
| .long 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2 |
| |
| .section .rodata.cst16.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 16 |
| .align 16 |
| PSHUFFLE_BYTE_FLIP_MASK: |
| .octa 0x0c0d0e0f08090a0b0405060700010203 |
