diff options
Diffstat (limited to 'crypto/x86cpuid.pl')
| -rw-r--r-- | crypto/x86cpuid.pl | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl new file mode 100644 index 0000000000..85fbef7417 --- /dev/null +++ b/crypto/x86cpuid.pl @@ -0,0 +1,43 @@ +#!/usr/bin/env perl + +push(@INC,"perlasm"); +require "x86asm.pl"; + +&asm_init($ARGV[0],"x86cpuid"); + +&function_begin("OPENSSL_ia32_cpuid"); + &xor ("edx","edx"); + &pushf (); + &pop ("eax"); + &mov ("ecx","eax"); + &xor ("eax",1<<21); + &push ("eax"); + &popf (); + &pushf (); + &pop ("eax"); + &xor ("ecx","eax"); + &bt ("ecx",21); + &jnc (&label("nocpuid")); + &mov ("eax",1); + &cpuid (); +&set_label("nocpuid"); + &mov ("eax","edx"); + &mov ("edx","ecx"); +&function_end("OPENSSL_ia32_cpuid"); + +&external_label("OPENSSL_ia32cap"); + +&function_begin_B("OPENSSL_rdtsc"); + &xor ("eax","eax"); + &xor ("edx","edx"); + &picmeup("ecx","OPENSSL_ia32cap"); + &bt (&DWP(0,"ecx"),4); + &jnc (&label("notsc")); + &rdtsc (); +&set_label("notsc"); + &ret (); +&function_end_B("OPENSSL_rdtsc"); + +&initseg("OPENSSL_cpuid_setup") if ($main'elf); + +&asm_finish(); |