diff options
Diffstat (limited to 'src/arch/x86/include/div64.h')
| -rw-r--r-- | src/arch/x86/include/div64.h | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/src/arch/x86/include/div64.h b/src/arch/x86/include/div64.h deleted file mode 100644 index bbc9921..0000000 --- a/src/arch/x86/include/div64.h +++ /dev/null @@ -1,30 +0,0 @@ -#ifndef __I386_DIV64 -#define __I386_DIV64 - -/* - * do_div() is NOT a C function. It wants to return - * two values (the quotient and the remainder), but - * since that doesn't work very well in C, what it - * does is: - * - * - modifies the 64-bit dividend _in_place_ - * - returns the 32-bit remainder - * - * This ends up being the most efficient "calling - * convention" on x86. - */ -#define do_div(n,base) ({ \ - unsigned long __upper, __low, __high, __mod, __base; \ - __base = (base); \ - asm("":"=a" (__low), "=d" (__high):"A" (n)); \ - __upper = __high; \ - if (__high) { \ - __upper = __high % (__base); \ - __high = __high / (__base); \ - } \ - asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \ - asm("":"=A" (n):"a" (__low),"d" (__high)); \ - __mod; \ -}) - -#endif |
