crypto/arm64cpuid.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9
  10 $flavour = shift;
  11 $output  = shift;
  12
  13 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  14 ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
  15 ( $xlate="${dir}perlasm/arm-xlate.pl" and -f $xlate) or
  16 die "can't locate arm-xlate.pl";
  17
  18 open OUT,"| \"$^X\" $xlate $flavour $output";
  19 *STDOUT=*OUT;
  20
  21 $code.=<<___;
  22 #include "arm_arch.h"
  23
  24 .text
  25 .arch   armv8-a+crypto
  26
  27 .align  5
  28 .globl  _armv7_neon_probe
  29 .type   _armv7_neon_probe,%function
  30 _armv7_neon_probe:
  31         orr     v15.16b, v15.16b, v15.16b
  32         ret
  33 .size   _armv7_neon_probe,.-_armv7_neon_probe
  34
  35 .globl  _armv7_tick
  36 .type   _armv7_tick,%function
  37 _armv7_tick:
  38 #ifdef  __APPLE__
  39         mrs     x0, CNTPCT_EL0
  40 #else
  41         mrs     x0, CNTVCT_EL0
  42 #endif
  43         ret
  44 .size   _armv7_tick,.-_armv7_tick
  45
  46 .globl  _armv8_aes_probe
  47 .type   _armv8_aes_probe,%function
  48 _armv8_aes_probe:
  49         aese    v0.16b, v0.16b
  50         ret
  51 .size   _armv8_aes_probe,.-_armv8_aes_probe
  52
  53 .globl  _armv8_sha1_probe
  54 .type   _armv8_sha1_probe,%function
  55 _armv8_sha1_probe:
  56         sha1h   s0, s0
  57         ret
  58 .size   _armv8_sha1_probe,.-_armv8_sha1_probe
  59
  60 .globl  _armv8_sha256_probe
  61 .type   _armv8_sha256_probe,%function
  62 _armv8_sha256_probe:
  63         sha256su0       v0.4s, v0.4s
  64         ret
  65 .size   _armv8_sha256_probe,.-_armv8_sha256_probe
  66
  67 .globl  _armv8_pmull_probe
  68 .type   _armv8_pmull_probe,%function
  69 _armv8_pmull_probe:
  70         pmull   v0.1q, v0.1d, v0.1d
  71         ret
  72 .size   _armv8_pmull_probe,.-_armv8_pmull_probe
  73
  74 .globl  _armv8_sha512_probe
  75 .type   _armv8_sha512_probe,%function
  76 _armv8_sha512_probe:
  77         .long   0xcec08000      // sha512su0    v0.2d,v0.2d
  78         ret
  79 .size   _armv8_sha512_probe,.-_armv8_sha512_probe
  80
  81 .globl  OPENSSL_cleanse
  82 .type   OPENSSL_cleanse,%function
  83 .align  5
  84 OPENSSL_cleanse:
  85         cbz     x1,.Lret        // len==0?
  86         cmp     x1,#15
  87         b.hi    .Lot            // len>15
  88         nop
  89 .Little:
  90         strb    wzr,[x0],#1     // store byte-by-byte
  91         subs    x1,x1,#1
  92         b.ne    .Little
  93 .Lret:  ret
  94
  95 .align  4
  96 .Lot:   tst     x0,#7
  97         b.eq    .Laligned       // inp is aligned
  98         strb    wzr,[x0],#1     // store byte-by-byte
  99         sub     x1,x1,#1
 100         b       .Lot
 101
 102 .align  4
 103 .Laligned:
 104         str     xzr,[x0],#8     // store word-by-word
 105         sub     x1,x1,#8
 106         tst     x1,#-8
 107         b.ne    .Laligned       // len>=8
 108         cbnz    x1,.Little      // len!=0?
 109         ret
 110 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 111
 112 .globl  CRYPTO_memcmp
 113 .type   CRYPTO_memcmp,%function
 114 .align  4
 115 CRYPTO_memcmp:
 116         eor     w3,w3,w3
 117         cbz     x2,.Lno_data    // len==0?
 118         cmp     x2,#16
 119         b.ne    .Loop_cmp
 120         ldp     x8,x9,[x0]
 121         ldp     x10,x11,[x1]
 122         eor     x8,x8,x10
 123         eor     x9,x9,x11
 124         orr     x8,x8,x9
 125         mov     x0,#1
 126         cmp     x8,#0
 127         csel    x0,xzr,x0,eq
 128         ret
 129
 130 .align  4
 131 .Loop_cmp:
 132         ldrb    w4,[x0],#1
 133         ldrb    w5,[x1],#1
 134         eor     w4,w4,w5
 135         orr     w3,w3,w4
 136         subs    x2,x2,#1
 137         b.ne    .Loop_cmp
 138
 139 .Lno_data:
 140         neg     w0,w3
 141         lsr     w0,w0,#31
 142         ret
 143 .size   CRYPTO_memcmp,.-CRYPTO_memcmp
 144 ___
 145
 146 print $code;
 147 close STDOUT;