generic-library/openssl
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Don't emit SSE2 instructions unless were asked to.

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PR: 1073
This commit is contained in:
Andy Polyakov 2005-05-18 08:42:08 +00:00
parent 51ff6bde38
commit c50226594d
1 changed files with 15 additions and 11 deletions
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26
crypto/x86cpuid.pl
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@ -5,6 +5,8 @@ require "x86asm.pl";
&asm_init($ARGV[0],"x86cpuid");
for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
&function_begin("OPENSSL_ia32_cpuid");
&xor ("edx","edx");
&pushf ();
@ -115,17 +117,19 @@ require "x86asm.pl";
&mov ("ecx",&DWP(0,"ecx"));
&bt (&DWP(0,"ecx"),1);
&jnc (&label("no_x87"));
&bt (&DWP(0,"ecx"),26);
&jnc (&label("no_sse2"));
&pxor ("xmm0","xmm0");
&pxor ("xmm1","xmm1");
&pxor ("xmm2","xmm2");
&pxor ("xmm3","xmm3");
&pxor ("xmm4","xmm4");
&pxor ("xmm5","xmm5");
&pxor ("xmm6","xmm6");
&pxor ("xmm7","xmm7");
&set_label("no_sse2");
if ($sse2) {
&bt (&DWP(0,"ecx"),26);
&jnc (&label("no_sse2"));
&pxor ("xmm0","xmm0");
&pxor ("xmm1","xmm1");
&pxor ("xmm2","xmm2");
&pxor ("xmm3","xmm3");
&pxor ("xmm4","xmm4");
&pxor ("xmm5","xmm5");
&pxor ("xmm6","xmm6");
&pxor ("xmm7","xmm7");
&set_label("no_sse2");
}
# just a bunch of fldz to zap the fp/mm bank...
&data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9);
&emms ();