Qemu support of sse4.2 extended instructions.

[enf@…]

Qemu disables processor instruction extentions with non linux builds -- mac builds. specifically, processor sse4.2 functions.

Here is patch for cpu.c file to allow.

mmacbookpro-enf:~ enf$ diff -c ~/Downloads/qemu-1.2.0/target-i386/cpu.c ~/src/play/c/qemu-1.2.0/target-i386/cpu.c
*** /Users/enf/Downloads/qemu-1.2.0/target-i386/cpu.c 2012-09-05 07:03:06.000000000 -0700
--- /Users/enf/src/play/c/qemu-1.2.0/target-i386/cpu.c 2012-11-01 19:32:19.000000000 -0700
***************
*** 116,122 ****
 void host_cpuid(uint32_t function, uint32_t count,
                 uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
 {
! #if defined(CONFIG_KVM)
     uint32_t vec[4];

 #ifdef __x86_64__
--- 116,122 ----
 void host_cpuid(uint32_t function, uint32_t count,
                 uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
 {
! #if defined(CONFIG_KVM) || defined(__APPLE__)
     uint32_t vec[4];

 #ifdef __x86_64__
***************
*** 273,279 ****
           CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
 #define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
           CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
!           CPUID_EXT_HYPERVISOR)
           /* missing:
           CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
           CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */
--- 273,279 ----
           CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
 #define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
           CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
!           CPUID_EXT_HYPERVISOR | CPUID_EXT_SSE42)
           /* missing:
           CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
           CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */

[ryandesign (Ryan Carsten Schmidt)]

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