x86[_64]cpuid.pl: add function accessing rdrand instruction.

[openssl.git] / crypto / x86cpuid.pl

diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl
index 716f44da92a5d75f2d55c77801ab2e311bcdedd8..6595ff35fc1bbcbf6a4619a56088e48e7b2bd39b 100644 (file)
--- a/crypto/x86cpuid.pl
+++ b/crypto/x86cpuid.pl
@@ -92,7 +92,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 &set_label("nocacheinfo");
        &mov    ("eax",1);
        &cpuid  ();
-       &and    ("edx",~(1<<20|1<<30)); # force reserved bits to 0
+       &and    ("edx",0xbfefffff);     # force reserved bits #20, #30 to 0
        &cmp    ("ebp",0);
        &jne    (&label("notintel"));
        &or     ("edx",1<<30);          # set reserved bit#30 on Intel CPUs
@@ -115,7 +115,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 
 &set_label("generic");
        &and    ("ebp",1<<11);          # isolate AMD XOP flag
-       &and    ("ecx",~(1<<11));
+       &and    ("ecx",0xfffff7ff);     # force 11th bit to 0
        &mov    ("esi","edx");
        &or     ("ebp","ecx");          # merge AMD XOP flag
 
@@ -131,10 +131,10 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
        &cmp    ("eax",2);
        &je     (&label("clear_avx"));
 &set_label("clear_xmm");
-       &and    ("ebp",~(1<<25|1<<1));  # clear AESNI and PCLMULQDQ bits
-       &and    ("esi",~(1<<24));       # clear FXSR
+       &and    ("ebp",0xfdfffffd);     # clear AESNI and PCLMULQDQ bits
+       &and    ("esi",0xfeffffff);     # clear FXSR
 &set_label("clear_avx");
-       &and    ("ebp",~(1<<28|1<<12|1<<11));# clear AVX, FMA and AMD XOP bits
+       &and    ("ebp",0xefffe7ff);     # clear AVX, FMA and AMD XOP bits
 &set_label("done");
        &mov    ("eax","esi");
        &mov    ("edx","ebp");
@@ -442,6 +442,18 @@ my $max = "ebp";
 &function_end("OPENSSL_instrument_bus2");
 }
 
+&function_begin_B("OPENSSL_ia32_rdrand");
+       &mov    ("ecx",8);
+&set_label("loop");
+       &rdrand ("eax");
+       &jc     (&label("break"));
+       &loop   (&label("loop"));
+&set_label("break");
+       &cmp    ("eax",0);
+       &cmove  ("eax","ecx");
+       &ret    ();
+&function_end_B("OPENSSL_ia32_rdrand");
+
 &initseg("OPENSSL_cpuid_setup");
 
 &asm_finish();