diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2008-08-17 21:05:42 -0400 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-10-22 22:55:20 -0700 |
commit | bb8985586b7a906e116db835c64773b7a7d51663 (patch) | |
tree | de93ae58e88cc563d95cc124a73f3930594c6100 /include/asm-x86/div64.h | |
parent | 8ede0bdb63305d3353efd97e9af6210afb05734e (diff) |
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/asm-x86/div64.h')
-rw-r--r-- | include/asm-x86/div64.h | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/include/asm-x86/div64.h b/include/asm-x86/div64.h deleted file mode 100644 index f9530f23f1d..00000000000 --- a/include/asm-x86/div64.h +++ /dev/null @@ -1,60 +0,0 @@ -#ifndef ASM_X86__DIV64_H -#define ASM_X86__DIV64_H - -#ifdef CONFIG_X86_32 - -#include <linux/types.h> - -/* - * 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; \ -}) - -static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) -{ - union { - u64 v64; - u32 v32[2]; - } d = { dividend }; - u32 upper; - - upper = d.v32[1]; - d.v32[1] = 0; - if (upper >= divisor) { - d.v32[1] = upper / divisor; - upper %= divisor; - } - asm ("divl %2" : "=a" (d.v32[0]), "=d" (*remainder) : - "rm" (divisor), "0" (d.v32[0]), "1" (upper)); - return d.v64; -} -#define div_u64_rem div_u64_rem - -#else -# include <asm-generic/div64.h> -#endif /* CONFIG_X86_32 */ - -#endif /* ASM_X86__DIV64_H */ |