Resolve warnings in VC-WIN32 build, which allows to add /WX.

[openssl.git] / crypto / x86_64cpuid.pl

diff --git a/crypto/x86_64cpuid.pl b/crypto/x86_64cpuid.pl
index a430ab9d650bf440fc47e5755c199c6080926bf9..ef3608b13495e0e8c4733d0e13a4da94a060c8be 100644 (file)
--- a/crypto/x86_64cpuid.pl
+++ b/crypto/x86_64cpuid.pl
@@ -59,20 +59,10 @@ OPENSSL_ia32_cpuid:
        mov     %rbx,%r8                # save %rbx
 
        xor     %eax,%eax
-       mov     %eax,8(%rdi)            # clear 3rd word
+       mov     %eax,8(%rdi)            # clear extended feature flags
        cpuid
        mov     %eax,%r11d              # max value for standard query level
 
-       cmp     \$7,%eax
-       jb      .Lno_extended_info
-
-       mov     \$7,%eax
-       xor     %ecx,%ecx
-       cpuid
-       mov     %ebx,8(%rdi)
-
-.Lno_extended_info:
-
        xor     %eax,%eax
        cmp     \$0x756e6547,%ebx       # "Genu"
        setne   %al
@@ -146,8 +136,19 @@ OPENSSL_ia32_cpuid:
        or      \$0x40000000,%edx       # set reserved bit#30 on Intel CPUs
        and     \$15,%ah
        cmp     \$15,%ah                # examine Family ID
-       jne     .Lnotintel
+       jne     .LnotP4
        or      \$0x00100000,%edx       # set reserved bit#20 to engage RC4_CHAR
+.LnotP4:
+       cmp     \$6,%ah
+       jne     .Lnotintel
+       and     \$0x0fff0ff0,%eax
+       cmp     \$0x00050670,%eax       # Knights Landing
+       je      .Lknights
+       cmp     \$0x00080650,%eax       # Knights Mill (according to sde)
+       jne     .Lnotintel
+.Lknights:
+       and     \$0xfbffffff,%ecx       # clear XSAVE flag to mimic Silvermont
+
 .Lnotintel:
        bt      \$28,%edx               # test hyper-threading bit
        jnc     .Lgeneric
@@ -166,6 +167,19 @@ OPENSSL_ia32_cpuid:
        or      %ecx,%r9d               # merge AMD XOP flag
 
        mov     %edx,%r10d              # %r9d:%r10d is copy of %ecx:%edx
+
+       cmp     \$7,%r11d
+       jb      .Lno_extended_info
+       mov     \$7,%eax
+       xor     %ecx,%ecx
+       cpuid
+       bt      \$26,%r9d               # check XSAVE bit, cleared on Knights
+       jc      .Lnotknights
+       and     \$0xfff7ffff,%ebx       # clear ADCX/ADOX flag
+.Lnotknights:
+       mov     %ebx,8(%rdi)            # save extended feature flags
+.Lno_extended_info:
+
        bt      \$27,%r9d               # check OSXSAVE bit
        jnc     .Lclear_avx
        xor     %ecx,%ecx               # XCR0
@@ -176,7 +190,7 @@ OPENSSL_ia32_cpuid:
 .Lclear_avx:
        mov     \$0xefffe7ff,%eax       # ~(1<<28|1<<12|1<<11)
        and     %eax,%r9d               # clear AVX, FMA and AMD XOP bits
-       andl    \$0xffffffdf,8(%rdi)    # cleax AVX2, ~(1<<5)
+       andl    \$0xffffffdf,8(%rdi)    # clear AVX2, ~(1<<5)
 .Ldone:
        shl     \$32,%r9
        mov     %r10d,%eax