SEED to support OPENSSL_SMALL_FOOTPRINT: ~2x size decrease on x86.

[openssl.git] / crypto / x86cpuid.pl

diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl
index 13828d5633160b34460311303b4fbfc60ff92707..c3291112032b3ff7b365830ecf123f3a4efc4df8 100644 (file)
--- a/crypto/x86cpuid.pl
+++ b/crypto/x86cpuid.pl
@@ -1,6 +1,7 @@
 #!/usr/bin/env perl
 
-push(@INC,"perlasm");
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+push(@INC, "${dir}perlasm", "perlasm");
 require "x86asm.pl";
 
 &asm_init($ARGV[0],"x86cpuid");
@@ -19,7 +20,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
        &pop    ("eax");
        &xor    ("ecx","eax");
        &bt     ("ecx",21);
-       &jnc    (&label("nocpuid"));
+       &jnc    (&label("done"));
        &xor    ("eax","eax");
        &cpuid  ();
        &xor    ("eax","eax");
@@ -34,17 +35,20 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
        &or     ("ebp","eax");
        &mov    ("eax",1);
        &cpuid  ();
-       &bt     ("edx",28);             # test hyper-threading bit
-       &jnc    (&label("nocpuid"));
        &cmp    ("ebp",0);
-       &jne    (&label("notintel"));
+       &jne    (&label("notP4"));
+       &and    (&HB("eax"),15);        # familiy ID
+       &cmp    (&HB("eax"),15);        # P4?
+       &jne    (&label("notP4"));
        &or     ("edx",1<<20);          # use reserved bit to engage RC4_CHAR
-&set_label("notintel");
+&set_label("notP4");
+       &bt     ("edx",28);             # test hyper-threading bit
+       &jnc    (&label("done"));
        &shr    ("ebx",16);
        &cmp    (&LB("ebx"),1);         # see if cache is shared(*)
-       &ja     (&label("nocpuid"));
-       &and    ("edx",~(1<<28));       # clear hyper-threading bit if not
-&set_label("nocpuid");
+       &ja     (&label("done"));
+       &and    ("edx",0xefffffff);     # clear hyper-threading bit if not
+&set_label("done");
        &mov    ("eax","edx");
        &mov    ("edx","ecx");
 &function_end("OPENSSL_ia32_cpuid");