kfr

commit 8de4b0fe7e8c96548de8dd62c698399fdd58f8e6
parent 394ac51ae6bd8d2d9ac6ff845043ee0bcec8d3e7
Author: [email protected] <[email protected]>
Date:   Tue,  2 Aug 2016 23:19:30 +0300

Fix cpuid code for old cpus

Diffstat:
M
include/kfr/base/cpuid.hpp
 | 
10
++--------

1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/include/kfr/base/cpuid.hpp b/include/kfr/base/cpuid.hpp
@@ -242,15 +242,9 @@ cpu_t detect_cpu()
     c.has3DNOWEXT    = c.isAMD && f_81_EDX >> 30 & 1;
     c.has3DNOW       = c.isAMD && f_81_EDX >> 31 & 1;
 
-    const u32 xcr0 = get_xcr0();
+    c.hasAVXOSSUPPORT    = c.hasAVX && c.hasOSXSAVE && (get_xcr0() & 0x06) == 0x06;
+    c.hasAVX512OSSUPPORT = c.hasAVXOSSUPPORT && c.hasAVX512F && c.hasOSXSAVE && (get_xcr0() & 0xE0) == 0xE0;
 
-    c.hasAVXOSSUPPORT    = c.hasAVX && c.hasOSXSAVE && (xcr0 & 0x06) == 0x06;
-    c.hasAVX512OSSUPPORT = c.hasAVX512F && c.hasOSXSAVE && (xcr0 & 0xE0) == 0xE0;
-
-#ifdef KFR_AVAIL_AVX512
-    if (c.hasAVX512F && c.hasAVX512BW && c.hasAVX512DQ && c.hasAVX512OSSUPPORT)
-        return cpu_t::avx3;
-#endif
 #ifdef KFR_AVAIL_AVX2
     if (c.hasAVX2 && c.hasAVXOSSUPPORT)
         return cpu_t::avx2;