diff options
Diffstat (limited to 'src/include/cpu/x86/mem.h')
| -rw-r--r-- | src/include/cpu/x86/mem.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/include/cpu/x86/mem.h b/src/include/cpu/x86/mem.h new file mode 100644 index 0000000000..4849ed289a --- /dev/null +++ b/src/include/cpu/x86/mem.h @@ -0,0 +1,18 @@ +#ifndef CPU_X86_MEM_H +#define CPU_X86_MEM_H + +/* Optimized generic x86 assembly for clearing memory */ +static inline void clear_memory(void *addr, unsigned long size) +{ + asm volatile( + "1: \n\t" + "movl %0, (%1)\n\t" + "addl $4, %1\n\t" + "subl $4, %2\n\t" + "jnz 1b\n\t" + : /* No outputs */ + : "a" (0), "D" (addr), "c" (size) + ); +} + +#endif /* CPU_X86_MEM_H */ |