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 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  11 ( $xlate="${dir}perlasm/x86_64-xlate.pl" and -f $xlate) or
  12 die "can't locate x86_64-xlate.pl";
  13
  14 open OUT,"| \"$^X\" $xlate $flavour $output";
  15 *STDOUT=*OUT;
  16
  17 ($arg1,$arg2,$arg3,$arg4)=$win64?("%rcx","%rdx","%r8", "%r9") : # Win64 order
  18                                  ("%rdi","%rsi","%rdx","%rcx"); # Unix order
  19
  20 print<<___;
  21 .extern         OPENSSL_cpuid_setup
  22 .hidden         OPENSSL_cpuid_setup
  23 .section        .init
  24         call    OPENSSL_cpuid_setup
  25
  26 .hidden OPENSSL_ia32cap_P
  27 .comm   OPENSSL_ia32cap_P,16,4
  28
  29 .text
  30
  31 .globl  OPENSSL_atomic_add
  32 .type   OPENSSL_atomic_add,\@abi-omnipotent
  33 .align  16
  34 OPENSSL_atomic_add:
  35         movl    ($arg1),%eax
  36 .Lspin: leaq    ($arg2,%rax),%r8
  37         .byte   0xf0            # lock
  38         cmpxchgl        %r8d,($arg1)
  39         jne     .Lspin
  40         movl    %r8d,%eax
  41         .byte   0x48,0x98       # cltq/cdqe
  42         ret
  43 .size   OPENSSL_atomic_add,.-OPENSSL_atomic_add
  44
  45 .globl  OPENSSL_rdtsc
  46 .type   OPENSSL_rdtsc,\@abi-omnipotent
  47 .align  16
  48 OPENSSL_rdtsc:
  49         rdtsc
  50         shl     \$32,%rdx
  51         or      %rdx,%rax
  52         ret
  53 .size   OPENSSL_rdtsc,.-OPENSSL_rdtsc
  54
  55 .globl  OPENSSL_ia32_cpuid
  56 .type   OPENSSL_ia32_cpuid,\@function,1
  57 .align  16
  58 OPENSSL_ia32_cpuid:
  59         mov     %rbx,%r8                # save %rbx
  60
  61         xor     %eax,%eax
  62         mov     %eax,8(%rdi)            # clear extended feature flags
  63         cpuid
  64         mov     %eax,%r11d              # max value for standard query level
  65
  66         xor     %eax,%eax
  67         cmp     \$0x756e6547,%ebx       # "Genu"
  68         setne   %al
  69         mov     %eax,%r9d
  70         cmp     \$0x49656e69,%edx       # "ineI"
  71         setne   %al
  72         or      %eax,%r9d
  73         cmp     \$0x6c65746e,%ecx       # "ntel"
  74         setne   %al
  75         or      %eax,%r9d               # 0 indicates Intel CPU
  76         jz      .Lintel
  77
  78         cmp     \$0x68747541,%ebx       # "Auth"
  79         setne   %al
  80         mov     %eax,%r10d
  81         cmp     \$0x69746E65,%edx       # "enti"
  82         setne   %al
  83         or      %eax,%r10d
  84         cmp     \$0x444D4163,%ecx       # "cAMD"
  85         setne   %al
  86         or      %eax,%r10d              # 0 indicates AMD CPU
  87         jnz     .Lintel
  88
  89         # AMD specific
  90         mov     \$0x80000000,%eax
  91         cpuid
  92         cmp     \$0x80000001,%eax
  93         jb      .Lintel
  94         mov     %eax,%r10d
  95         mov     \$0x80000001,%eax
  96         cpuid
  97         or      %ecx,%r9d
  98         and     \$0x00000801,%r9d       # isolate AMD XOP bit, 1<<11
  99
 100         cmp     \$0x80000008,%r10d
 101         jb      .Lintel
 102
 103         mov     \$0x80000008,%eax
 104         cpuid
 105         movzb   %cl,%r10                # number of cores - 1
 106         inc     %r10                    # number of cores
 107
 108         mov     \$1,%eax
 109         cpuid
 110         bt      \$28,%edx               # test hyper-threading bit
 111         jnc     .Lgeneric
 112         shr     \$16,%ebx               # number of logical processors
 113         cmp     %r10b,%bl
 114         ja      .Lgeneric
 115         and     \$0xefffffff,%edx       # ~(1<<28)
 116         jmp     .Lgeneric
 117
 118 .Lintel:
 119         cmp     \$4,%r11d
 120         mov     \$-1,%r10d
 121         jb      .Lnocacheinfo
 122
 123         mov     \$4,%eax
 124         mov     \$0,%ecx                # query L1D
 125         cpuid
 126         mov     %eax,%r10d
 127         shr     \$14,%r10d
 128         and     \$0xfff,%r10d           # number of cores -1 per L1D
 129
 130 .Lnocacheinfo:
 131         mov     \$1,%eax
 132         cpuid
 133         and     \$0xbfefffff,%edx       # force reserved bits to 0
 134         cmp     \$0,%r9d
 135         jne     .Lnotintel
 136         or      \$0x40000000,%edx       # set reserved bit#30 on Intel CPUs
 137         and     \$15,%ah
 138         cmp     \$15,%ah                # examine Family ID
 139         jne     .LnotP4
 140         or      \$0x00100000,%edx       # set reserved bit#20 to engage RC4_CHAR
 141 .LnotP4:
 142         cmp     \$6,%ah
 143         jne     .Lnotintel
 144         and     \$0x0fff0ff0,%eax
 145         cmp     \$0x00050670,%eax       # Knights Landing
 146         je      .Lknights
 147         cmp     \$0x00080650,%eax       # Knights Mill (according to sde)
 148         jne     .Lnotintel
 149 .Lknights:
 150         and     \$0xfbffffff,%ecx       # clear XSAVE flag to mimic Silvermont
 151
 152 .Lnotintel:
 153         bt      \$28,%edx               # test hyper-threading bit
 154         jnc     .Lgeneric
 155         and     \$0xefffffff,%edx       # ~(1<<28)
 156         cmp     \$0,%r10d
 157         je      .Lgeneric
 158
 159         or      \$0x10000000,%edx       # 1<<28
 160         shr     \$16,%ebx
 161         cmp     \$1,%bl                 # see if cache is shared
 162         ja      .Lgeneric
 163         and     \$0xefffffff,%edx       # ~(1<<28)
 164 .Lgeneric:
 165         and     \$0x00000800,%r9d       # isolate AMD XOP flag
 166         and     \$0xfffff7ff,%ecx
 167         or      %ecx,%r9d               # merge AMD XOP flag
 168
 169         mov     %edx,%r10d              # %r9d:%r10d is copy of %ecx:%edx
 170
 171         cmp     \$7,%r11d
 172         jb      .Lno_extended_info
 173         mov     \$7,%eax
 174         xor     %ecx,%ecx
 175         cpuid
 176         bt      \$26,%r9d               # check XSAVE bit, cleared on Knights
 177         jc      .Lnotknights
 178         and     \$0xfff7ffff,%ebx       # clear ADCX/ADOX flag
 179 .Lnotknights:
 180         mov     %ebx,8(%rdi)            # save extended feature flags
 181 .Lno_extended_info:
 182
 183         bt      \$27,%r9d               # check OSXSAVE bit
 184         jnc     .Lclear_avx
 185         xor     %ecx,%ecx               # XCR0
 186         .byte   0x0f,0x01,0xd0          # xgetbv
 187         and     \$6,%eax                # isolate XMM and YMM state support
 188         cmp     \$6,%eax
 189         je      .Ldone
 190 .Lclear_avx:
 191         mov     \$0xefffe7ff,%eax       # ~(1<<28|1<<12|1<<11)
 192         and     %eax,%r9d               # clear AVX, FMA and AMD XOP bits
 193         andl    \$0xffffffdf,8(%rdi)    # clear AVX2, ~(1<<5)
 194 .Ldone:
 195         shl     \$32,%r9
 196         mov     %r10d,%eax
 197         mov     %r8,%rbx                # restore %rbx
 198         or      %r9,%rax
 199         ret
 200 .size   OPENSSL_ia32_cpuid,.-OPENSSL_ia32_cpuid
 201
 202 .globl  OPENSSL_cleanse
 203 .type   OPENSSL_cleanse,\@abi-omnipotent
 204 .align  16
 205 OPENSSL_cleanse:
 206         xor     %rax,%rax
 207         cmp     \$15,$arg2
 208         jae     .Lot
 209         cmp     \$0,$arg2
 210         je      .Lret
 211 .Little:
 212         mov     %al,($arg1)
 213         sub     \$1,$arg2
 214         lea     1($arg1),$arg1
 215         jnz     .Little
 216 .Lret:
 217         ret
 218 .align  16
 219 .Lot:
 220         test    \$7,$arg1
 221         jz      .Laligned
 222         mov     %al,($arg1)
 223         lea     -1($arg2),$arg2
 224         lea     1($arg1),$arg1
 225         jmp     .Lot
 226 .Laligned:
 227         mov     %rax,($arg1)
 228         lea     -8($arg2),$arg2
 229         test    \$-8,$arg2
 230         lea     8($arg1),$arg1
 231         jnz     .Laligned
 232         cmp     \$0,$arg2
 233         jne     .Little
 234         ret
 235 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 236 ___
 237
 238 print<<___ if (!$win64);
 239 .globl  OPENSSL_wipe_cpu
 240 .type   OPENSSL_wipe_cpu,\@abi-omnipotent
 241 .align  16
 242 OPENSSL_wipe_cpu:
 243         pxor    %xmm0,%xmm0
 244         pxor    %xmm1,%xmm1
 245         pxor    %xmm2,%xmm2
 246         pxor    %xmm3,%xmm3
 247         pxor    %xmm4,%xmm4
 248         pxor    %xmm5,%xmm5
 249         pxor    %xmm6,%xmm6
 250         pxor    %xmm7,%xmm7
 251         pxor    %xmm8,%xmm8
 252         pxor    %xmm9,%xmm9
 253         pxor    %xmm10,%xmm10
 254         pxor    %xmm11,%xmm11
 255         pxor    %xmm12,%xmm12
 256         pxor    %xmm13,%xmm13
 257         pxor    %xmm14,%xmm14
 258         pxor    %xmm15,%xmm15
 259         xorq    %rcx,%rcx
 260         xorq    %rdx,%rdx
 261         xorq    %rsi,%rsi
 262         xorq    %rdi,%rdi
 263         xorq    %r8,%r8
 264         xorq    %r9,%r9
 265         xorq    %r10,%r10
 266         xorq    %r11,%r11
 267         leaq    8(%rsp),%rax
 268         ret
 269 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 270 ___
 271 print<<___ if ($win64);
 272 .globl  OPENSSL_wipe_cpu
 273 .type   OPENSSL_wipe_cpu,\@abi-omnipotent
 274 .align  16
 275 OPENSSL_wipe_cpu:
 276         pxor    %xmm0,%xmm0
 277         pxor    %xmm1,%xmm1
 278         pxor    %xmm2,%xmm2
 279         pxor    %xmm3,%xmm3
 280         pxor    %xmm4,%xmm4
 281         pxor    %xmm5,%xmm5
 282         xorq    %rcx,%rcx
 283         xorq    %rdx,%rdx
 284         xorq    %r8,%r8
 285         xorq    %r9,%r9
 286         xorq    %r10,%r10
 287         xorq    %r11,%r11
 288         leaq    8(%rsp),%rax
 289         ret
 290 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 291 ___
 292
 293 print<<___;
 294 .globl  OPENSSL_ia32_rdrand
 295 .type   OPENSSL_ia32_rdrand,\@abi-omnipotent
 296 .align  16
 297 OPENSSL_ia32_rdrand:
 298         mov     \$8,%ecx
 299 .Loop_rdrand:
 300         rdrand  %rax
 301         jc      .Lbreak_rdrand
 302         loop    .Loop_rdrand
 303 .Lbreak_rdrand:
 304         cmp     \$0,%rax
 305         cmove   %rcx,%rax
 306         ret
 307 .size   OPENSSL_ia32_rdrand,.-OPENSSL_ia32_rdrand
 308
 309 .globl  OPENSSL_ia32_rdseed
 310 .type   OPENSSL_ia32_rdseed,\@abi-omnipotent
 311 .align  16
 312 OPENSSL_ia32_rdseed:
 313         mov     \$8,%ecx
 314 .Loop_rdseed:
 315         rdseed  %rax
 316         jc      .Lbreak_rdseed
 317         loop    .Loop_rdseed
 318 .Lbreak_rdseed:
 319         cmp     \$0,%rax
 320         cmove   %rcx,%rax
 321         ret
 322 .size   OPENSSL_ia32_rdseed,.-OPENSSL_ia32_rdseed
 323 ___
 324
 325 close STDOUT;   # flush