djvulibre/djvulibre-always-assume-that-cpuid-works-on-x86_64.patch

23 lines
736 B
Diff

--- a/libdjvu/MMX.cpp
+++ b/libdjvu/MMX.cpp
@@ -169,16 +169,10 @@
#endif
#if defined(MMX) && defined(__GNUC__) && defined(__x86_64__)
// Detection of MMX for GCC
- __asm__ volatile (// Check that CR0:EM is clear
- "xorl %%edx,%%edx\n\t"
- "smsw %%ax\n\t"
- "andl $4,%%eax\n\t"
- "jnz 1f\n\t"
- // Execute CPUID
+ __asm__ volatile (// Execute CPUID
"movl $1,%%eax\n\t"
- "cpuid\n"
- // Finish
- "1:\tmovl %%edx, %0"
+ "cpuid\n\t"
+ "movl %%edx, %0"
: "=m" (cpuflags) :
: "eax","ebx","ecx","edx");
#endif