arch/x86/crypto/sha256-mb/sha256_mb_mgr_flush_avx2.S

   1 /*
   2  * Flush routine for SHA256 multibuffer
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  *  Copyright(c) 2016 Intel Corporation.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of version 2 of the GNU General Public License as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope that it will be useful, but
  16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  *  General Public License for more details.
  19  *
  20  *  Contact Information:
  21  *      Megha Dey <megha.dey@linux.intel.com>
  22  *
  23  *  BSD LICENSE
  24  *
  25  *  Copyright(c) 2016 Intel Corporation.
  26  *
  27  *  Redistribution and use in source and binary forms, with or without
  28  *  modification, are permitted provided that the following conditions
  29  *  are met:
  30  *
  31  *    * Redistributions of source code must retain the above copyright
  32  *      notice, this list of conditions and the following disclaimer.
  33  *    * Redistributions in binary form must reproduce the above copyright
  34  *      notice, this list of conditions and the following disclaimer in
  35  *      the documentation and/or other materials provided with the
  36  *      distribution.
  37  *    * Neither the name of Intel Corporation nor the names of its
  38  *      contributors may be used to endorse or promote products derived
  39  *      from this software without specific prior written permission.
  40  *
  41  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  42  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  43  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  44  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  45  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  47  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  48  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  49  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  50  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  51  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52  */
  53 #include <linux/linkage.h>
  54 #include <asm/frame.h>
  55 #include "sha256_mb_mgr_datastruct.S"
  56
  57 .extern sha256_x8_avx2
  58
  59 #LINUX register definitions
  60 #define arg1    %rdi
  61 #define arg2    %rsi
  62
  63 # Common register definitions
  64 #define state   arg1
  65 #define job     arg2
  66 #define len2    arg2
  67
  68 # idx must be a register not clobberred by sha1_mult
  69 #define idx             %r8
  70 #define DWORD_idx       %r8d
  71
  72 #define unused_lanes    %rbx
  73 #define lane_data       %rbx
  74 #define tmp2            %rbx
  75 #define tmp2_w          %ebx
  76
  77 #define job_rax         %rax
  78 #define tmp1            %rax
  79 #define size_offset     %rax
  80 #define tmp             %rax
  81 #define start_offset    %rax
  82
  83 #define tmp3            %arg1
  84
  85 #define extra_blocks    %arg2
  86 #define p               %arg2
  87
  88 .macro LABEL prefix n
  89 \prefix\n\():
  90 .endm
  91
  92 .macro JNE_SKIP i
  93 jne     skip_\i
  94 .endm
  95
  96 .altmacro
  97 .macro SET_OFFSET _offset
  98 offset = \_offset
  99 .endm
 100 .noaltmacro
 101
 102 # JOB_SHA256* sha256_mb_mgr_flush_avx2(MB_MGR *state)
 103 # arg 1 : rcx : state
 104 ENTRY(sha256_mb_mgr_flush_avx2)
 105         FRAME_BEGIN
 106         push    %rbx
 107
 108         # If bit (32+3) is set, then all lanes are empty
 109         mov     _unused_lanes(state), unused_lanes
 110         bt      $32+3, unused_lanes
 111         jc      return_null
 112
 113         # find a lane with a non-null job
 114         xor     idx, idx
 115         offset = (_ldata + 1 * _LANE_DATA_size + _job_in_lane)
 116         cmpq    $0, offset(state)
 117         cmovne  one(%rip), idx
 118         offset = (_ldata + 2 * _LANE_DATA_size + _job_in_lane)
 119         cmpq    $0, offset(state)
 120         cmovne  two(%rip), idx
 121         offset = (_ldata + 3 * _LANE_DATA_size + _job_in_lane)
 122         cmpq    $0, offset(state)
 123         cmovne  three(%rip), idx
 124         offset = (_ldata + 4 * _LANE_DATA_size + _job_in_lane)
 125         cmpq    $0, offset(state)
 126         cmovne  four(%rip), idx
 127         offset = (_ldata + 5 * _LANE_DATA_size + _job_in_lane)
 128         cmpq    $0, offset(state)
 129         cmovne  five(%rip), idx
 130         offset = (_ldata + 6 * _LANE_DATA_size + _job_in_lane)
 131         cmpq    $0, offset(state)
 132         cmovne  six(%rip), idx
 133         offset = (_ldata + 7 * _LANE_DATA_size + _job_in_lane)
 134         cmpq    $0, offset(state)
 135         cmovne  seven(%rip), idx
 136
 137         # copy idx to empty lanes
 138 copy_lane_data:
 139         offset =  (_args + _data_ptr)
 140         mov     offset(state,idx,8), tmp
 141
 142         I = 0
 143 .rep 8
 144         offset = (_ldata + I * _LANE_DATA_size + _job_in_lane)
 145         cmpq    $0, offset(state)
 146 .altmacro
 147         JNE_SKIP %I
 148         offset =  (_args + _data_ptr + 8*I)
 149         mov     tmp, offset(state)
 150         offset =  (_lens + 4*I)
 151         movl    $0xFFFFFFFF, offset(state)
 152 LABEL skip_ %I
 153         I = (I+1)
 154 .noaltmacro
 155 .endr
 156
 157         # Find min length
 158         vmovdqa _lens+0*16(state), %xmm0
 159         vmovdqa _lens+1*16(state), %xmm1
 160
 161         vpminud %xmm1, %xmm0, %xmm2             # xmm2 has {D,C,B,A}
 162         vpalignr $8, %xmm2, %xmm3, %xmm3        # xmm3 has {x,x,D,C}
 163         vpminud %xmm3, %xmm2, %xmm2             # xmm2 has {x,x,E,F}
 164         vpalignr $4, %xmm2, %xmm3, %xmm3        # xmm3 has {x,x,x,E}
 165         vpminud %xmm3, %xmm2, %xmm2             # xmm2 has min val in low dword
 166
 167         vmovd   %xmm2, DWORD_idx
 168         mov     idx, len2
 169         and     $0xF, idx
 170         shr     $4, len2
 171         jz      len_is_0
 172
 173         vpand   clear_low_nibble(%rip), %xmm2, %xmm2
 174         vpshufd $0, %xmm2, %xmm2
 175
 176         vpsubd  %xmm2, %xmm0, %xmm0
 177         vpsubd  %xmm2, %xmm1, %xmm1
 178
 179         vmovdqa %xmm0, _lens+0*16(state)
 180         vmovdqa %xmm1, _lens+1*16(state)
 181
 182         # "state" and "args" are the same address, arg1
 183         # len is arg2
 184         call    sha256_x8_avx2
 185         # state and idx are intact
 186
 187 len_is_0:
 188         # process completed job "idx"
 189         imul    $_LANE_DATA_size, idx, lane_data
 190         lea     _ldata(state, lane_data), lane_data
 191
 192         mov     _job_in_lane(lane_data), job_rax
 193         movq    $0, _job_in_lane(lane_data)
 194         movl    $STS_COMPLETED, _status(job_rax)
 195         mov     _unused_lanes(state), unused_lanes
 196         shl     $4, unused_lanes
 197         or      idx, unused_lanes
 198
 199         mov     unused_lanes, _unused_lanes(state)
 200         movl    $0xFFFFFFFF, _lens(state,idx,4)
 201
 202         vmovd   _args_digest(state , idx, 4) , %xmm0
 203         vpinsrd $1, _args_digest+1*32(state, idx, 4), %xmm0, %xmm0
 204         vpinsrd $2, _args_digest+2*32(state, idx, 4), %xmm0, %xmm0
 205         vpinsrd $3, _args_digest+3*32(state, idx, 4), %xmm0, %xmm0
 206         vmovd   _args_digest+4*32(state, idx, 4), %xmm1
 207         vpinsrd $1, _args_digest+5*32(state, idx, 4), %xmm1, %xmm1
 208         vpinsrd $2, _args_digest+6*32(state, idx, 4), %xmm1, %xmm1
 209         vpinsrd $3, _args_digest+7*32(state, idx, 4), %xmm1, %xmm1
 210
 211         vmovdqu %xmm0, _result_digest(job_rax)
 212         offset =  (_result_digest + 1*16)
 213         vmovdqu %xmm1, offset(job_rax)
 214
 215 return:
 216         pop     %rbx
 217         FRAME_END
 218         ret
 219
 220 return_null:
 221         xor     job_rax, job_rax
 222         jmp     return
 223 ENDPROC(sha256_mb_mgr_flush_avx2)
 224
 225 ##############################################################################
 226
 227 .align 16
 228 ENTRY(sha256_mb_mgr_get_comp_job_avx2)
 229         push    %rbx
 230
 231         ## if bit 32+3 is set, then all lanes are empty
 232         mov     _unused_lanes(state), unused_lanes
 233         bt      $(32+3), unused_lanes
 234         jc      .return_null
 235
 236         # Find min length
 237         vmovdqa _lens(state), %xmm0
 238         vmovdqa _lens+1*16(state), %xmm1
 239
 240         vpminud %xmm1, %xmm0, %xmm2             # xmm2 has {D,C,B,A}
 241         vpalignr $8, %xmm2, %xmm3, %xmm3        # xmm3 has {x,x,D,C}
 242         vpminud %xmm3, %xmm2, %xmm2             # xmm2 has {x,x,E,F}
 243         vpalignr $4, %xmm2, %xmm3, %xmm3        # xmm3 has {x,x,x,E}
 244         vpminud %xmm3, %xmm2, %xmm2             # xmm2 has min val in low dword
 245
 246         vmovd   %xmm2, DWORD_idx
 247         test    $~0xF, idx
 248         jnz     .return_null
 249
 250         # process completed job "idx"
 251         imul    $_LANE_DATA_size, idx, lane_data
 252         lea     _ldata(state, lane_data), lane_data
 253
 254         mov     _job_in_lane(lane_data), job_rax
 255         movq    $0,  _job_in_lane(lane_data)
 256         movl    $STS_COMPLETED, _status(job_rax)
 257         mov     _unused_lanes(state), unused_lanes
 258         shl     $4, unused_lanes
 259         or      idx, unused_lanes
 260         mov     unused_lanes, _unused_lanes(state)
 261
 262         movl    $0xFFFFFFFF, _lens(state,  idx, 4)
 263
 264         vmovd   _args_digest(state, idx, 4), %xmm0
 265         vpinsrd $1, _args_digest+1*32(state, idx, 4), %xmm0, %xmm0
 266         vpinsrd $2, _args_digest+2*32(state, idx, 4), %xmm0, %xmm0
 267         vpinsrd $3, _args_digest+3*32(state, idx, 4), %xmm0, %xmm0
 268         movl    _args_digest+4*32(state, idx, 4), tmp2_w
 269         vpinsrd $1, _args_digest+5*32(state, idx, 4), %xmm1, %xmm1
 270         vpinsrd $2, _args_digest+6*32(state, idx, 4), %xmm1, %xmm1
 271         vpinsrd $3, _args_digest+7*32(state, idx, 4), %xmm1, %xmm1
 272
 273         vmovdqu %xmm0, _result_digest(job_rax)
 274         movl    tmp2_w, _result_digest+1*16(job_rax)
 275
 276         pop     %rbx
 277
 278         ret
 279
 280 .return_null:
 281         xor     job_rax, job_rax
 282         pop     %rbx
 283         ret
 284 ENDPROC(sha256_mb_mgr_get_comp_job_avx2)
 285
 286 .data
 287
 288 .align 16
 289 clear_low_nibble:
 290 .octa   0x000000000000000000000000FFFFFFF0
 291 one:
 292 .quad   1
 293 two:
 294 .quad   2
 295 three:
 296 .quad   3
 297 four:
 298 .quad   4
 299 five:
 300 .quad   5
 301 six:
 302 .quad   6
 303 seven:
 304 .quad  7