crypto/x86_64cpuid.pl

   1 #!/usr/bin/env perl
   2
   3 $flavour = shift;
   4 $output  = shift;
   5 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
   6
   7 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
   8
   9 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  10 open STDOUT,"| $^X ${dir}perlasm/x86_64-xlate.pl $flavour $output";
  11
  12 if ($win64)     { $arg1="%rcx"; $arg2="%rdx"; }
  13 else            { $arg1="%rdi"; $arg2="%rsi"; }
  14 print<<___;
  15 .extern         OPENSSL_cpuid_setup
  16 .section        .init
  17         call    OPENSSL_cpuid_setup
  18
  19 .text
  20
  21 .globl  OPENSSL_atomic_add
  22 .type   OPENSSL_atomic_add,\@abi-omnipotent
  23 .align  16
  24 OPENSSL_atomic_add:
  25         movl    ($arg1),%eax
  26 .Lspin: leaq    ($arg2,%rax),%r8
  27         .byte   0xf0            # lock
  28         cmpxchgl        %r8d,($arg1)
  29         jne     .Lspin
  30         movl    %r8d,%eax
  31         .byte   0x48,0x98       # cltq/cdqe
  32         ret
  33 .size   OPENSSL_atomic_add,.-OPENSSL_atomic_add
  34
  35 .globl  OPENSSL_rdtsc
  36 .type   OPENSSL_rdtsc,\@abi-omnipotent
  37 .align  16
  38 OPENSSL_rdtsc:
  39         rdtsc
  40         shl     \$32,%rdx
  41         or      %rdx,%rax
  42         ret
  43 .size   OPENSSL_rdtsc,.-OPENSSL_rdtsc
  44
  45 .globl  OPENSSL_ia32_cpuid
  46 .type   OPENSSL_ia32_cpuid,\@abi-omnipotent
  47 .align  16
  48 OPENSSL_ia32_cpuid:
  49         mov     %rbx,%r8
  50
  51         xor     %eax,%eax
  52         cpuid
  53         mov     %eax,%r11d              # max value for standard query level
  54
  55         xor     %eax,%eax
  56         cmp     \$0x756e6547,%ebx       # "Genu"
  57         setne   %al
  58         mov     %eax,%r9d
  59         cmp     \$0x49656e69,%edx       # "ineI"
  60         setne   %al
  61         or      %eax,%r9d
  62         cmp     \$0x6c65746e,%ecx       # "ntel"
  63         setne   %al
  64         or      %eax,%r9d               # 0 indicates Intel CPU
  65         jz      .Lintel
  66
  67         cmp     \$0x68747541,%ebx       # "Auth"
  68         setne   %al
  69         mov     %eax,%r10d
  70         cmp     \$0x69746E65,%edx       # "enti"
  71         setne   %al
  72         or      %eax,%r10d
  73         cmp     \$0x444D4163,%ecx       # "cAMD"
  74         setne   %al
  75         or      %eax,%r10d              # 0 indicates AMD CPU
  76         jnz     .Lintel
  77
  78         # AMD specific
  79         mov     \$0x80000000,%eax
  80         cpuid
  81         cmp     \$0x80000008,%eax
  82         jb      .Lintel
  83
  84         mov     \$0x80000008,%eax
  85         cpuid
  86         movzb   %cl,%r10                # number of cores - 1
  87         inc     %r10                    # number of cores
  88
  89         mov     \$1,%eax
  90         cpuid
  91         bt      \$28,%edx               # test hyper-threading bit
  92         jnc     .Ldone
  93         shr     \$16,%ebx               # number of logical processors
  94         cmp     %r10b,%bl
  95         ja      .Ldone
  96         and     \$0xefffffff,%edx       # ~(1<<28)
  97         jmp     .Ldone
  98
  99 .Lintel:
 100         cmp     \$4,%r11d
 101         mov     \$-1,%r10d
 102         jb      .Lnocacheinfo
 103
 104         mov     \$4,%eax
 105         mov     \$0,%ecx                # query L1D
 106         cpuid
 107         mov     %eax,%r10d
 108         shr     \$14,%r10d
 109         and     \$0xfff,%r10d           # number of cores -1 per L1D
 110
 111 .Lnocacheinfo:
 112         mov     \$1,%eax
 113         cpuid
 114         cmp     \$0,%r9d
 115         jne     .Lnotintel
 116         or      \$0x00100000,%edx       # use reserved 20th bit to engage RC4_CHAR
 117         and     \$15,%ah
 118         cmp     \$15,%ah                # examine Family ID
 119         je      .Lnotintel
 120         or      \$0x40000000,%edx       # use reserved bit to skip unrolled loop
 121 .Lnotintel:
 122         bt      \$28,%edx               # test hyper-threading bit
 123         jnc     .Ldone
 124         and     \$0xefffffff,%edx       # ~(1<<28)
 125         cmp     \$0,%r10d
 126         je      .Ldone
 127
 128         or      \$0x10000000,%edx       # 1<<28
 129         shr     \$16,%ebx
 130         cmp     \$1,%bl                 # see if cache is shared
 131         ja      .Ldone
 132         and     \$0xefffffff,%edx       # ~(1<<28)
 133 .Ldone:
 134         shl     \$32,%rcx
 135         mov     %edx,%eax
 136         mov     %r8,%rbx
 137         or      %rcx,%rax
 138         ret
 139 .size   OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid
 140
 141 .globl  OPENSSL_cleanse
 142 .type   OPENSSL_cleanse,\@abi-omnipotent
 143 .align  16
 144 OPENSSL_cleanse:
 145         xor     %rax,%rax
 146         cmp     \$15,$arg2
 147         jae     .Lot
 148 .Little:
 149         mov     %al,($arg1)
 150         sub     \$1,$arg2
 151         lea     1($arg1),$arg1
 152         jnz     .Little
 153         ret
 154 .align  16
 155 .Lot:
 156         test    \$7,$arg1
 157         jz      .Laligned
 158         mov     %al,($arg1)
 159         lea     -1($arg2),$arg2
 160         lea     1($arg1),$arg1
 161         jmp     .Lot
 162 .Laligned:
 163         mov     %rax,($arg1)
 164         lea     -8($arg2),$arg2
 165         test    \$-8,$arg2
 166         lea     8($arg1),$arg1
 167         jnz     .Laligned
 168         cmp     \$0,$arg2
 169         jne     .Little
 170         ret
 171 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 172 ___
 173
 174 print<<___ if (!$win64);
 175 .globl  OPENSSL_wipe_cpu
 176 .type   OPENSSL_wipe_cpu,\@abi-omnipotent
 177 .align  16
 178 OPENSSL_wipe_cpu:
 179         pxor    %xmm0,%xmm0
 180         pxor    %xmm1,%xmm1
 181         pxor    %xmm2,%xmm2
 182         pxor    %xmm3,%xmm3
 183         pxor    %xmm4,%xmm4
 184         pxor    %xmm5,%xmm5
 185         pxor    %xmm6,%xmm6
 186         pxor    %xmm7,%xmm7
 187         pxor    %xmm8,%xmm8
 188         pxor    %xmm9,%xmm9
 189         pxor    %xmm10,%xmm10
 190         pxor    %xmm11,%xmm11
 191         pxor    %xmm12,%xmm12
 192         pxor    %xmm13,%xmm13
 193         pxor    %xmm14,%xmm14
 194         pxor    %xmm15,%xmm15
 195         xorq    %rcx,%rcx
 196         xorq    %rdx,%rdx
 197         xorq    %rsi,%rsi
 198         xorq    %rdi,%rdi
 199         xorq    %r8,%r8
 200         xorq    %r9,%r9
 201         xorq    %r10,%r10
 202         xorq    %r11,%r11
 203         leaq    8(%rsp),%rax
 204         ret
 205 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 206 ___
 207 print<<___ if ($win64);
 208 .globl  OPENSSL_wipe_cpu
 209 .type   OPENSSL_wipe_cpu,\@abi-omnipotent
 210 .align  16
 211 OPENSSL_wipe_cpu:
 212         pxor    %xmm0,%xmm0
 213         pxor    %xmm1,%xmm1
 214         pxor    %xmm2,%xmm2
 215         pxor    %xmm3,%xmm3
 216         pxor    %xmm4,%xmm4
 217         pxor    %xmm5,%xmm5
 218         xorq    %rcx,%rcx
 219         xorq    %rdx,%rdx
 220         xorq    %r8,%r8
 221         xorq    %r9,%r9
 222         xorq    %r10,%r10
 223         xorq    %r11,%r11
 224         leaq    8(%rsp),%rax
 225         ret
 226 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 227 ___
 228
 229 close STDOUT;   # flush