+++ /dev/null
-From: Ralf Baechle <ralf@linux-mips.org>
-Date: Thu, 30 Apr 2009 16:14:56 +0000 (+0200)
-Subject: MIPS: Rewrite <asm/div64.h> to work with gcc 4.4.0.
-X-Git-Url: http://www.linux-mips.org/git?p=linux.git;a=commitdiff_plain;h=a1b68289997030df64cba8478d5767fe10e42a58
-
-MIPS: Rewrite <asm/div64.h> to work with gcc 4.4.0.
-
-The inline assembler used on 32-bit kernels was using the "h" constraint
-which was considered dangerous and removed for gcc 4.4.0.
-
-Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
----
-
---- a/arch/mips/include/asm/div64.h
-+++ b/arch/mips/include/asm/div64.h
-@@ -6,105 +6,63 @@
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
--#ifndef _ASM_DIV64_H
--#define _ASM_DIV64_H
-+#ifndef __ASM_DIV64_H
-+#define __ASM_DIV64_H
-
--#include <linux/types.h>
-+#include <asm-generic/div64.h>
-
--#if (_MIPS_SZLONG == 32)
-+#if BITS_PER_LONG == 64
-
--#include <asm/compiler.h>
-+#include <linux/types.h>
-
- /*
- * No traps on overflows for any of these...
- */
-
--#define do_div64_32(res, high, low, base) ({ \
-- unsigned long __quot32, __mod32; \
-- unsigned long __cf, __tmp, __tmp2, __i; \
-- \
-- __asm__(".set push\n\t" \
-- ".set noat\n\t" \
-- ".set noreorder\n\t" \
-- "move %2, $0\n\t" \
-- "move %3, $0\n\t" \
-- "b 1f\n\t" \
-- " li %4, 0x21\n" \
-- "0:\n\t" \
-- "sll $1, %0, 0x1\n\t" \
-- "srl %3, %0, 0x1f\n\t" \
-- "or %0, $1, %5\n\t" \
-- "sll %1, %1, 0x1\n\t" \
-- "sll %2, %2, 0x1\n" \
-- "1:\n\t" \
-- "bnez %3, 2f\n\t" \
-- " sltu %5, %0, %z6\n\t" \
-- "bnez %5, 3f\n" \
-- "2:\n\t" \
-- " addiu %4, %4, -1\n\t" \
-- "subu %0, %0, %z6\n\t" \
-- "addiu %2, %2, 1\n" \
-- "3:\n\t" \
-- "bnez %4, 0b\n\t" \
-- " srl %5, %1, 0x1f\n\t" \
-- ".set pop" \
-- : "=&r" (__mod32), "=&r" (__tmp), \
-- "=&r" (__quot32), "=&r" (__cf), \
-- "=&r" (__i), "=&r" (__tmp2) \
-- : "Jr" (base), "0" (high), "1" (low)); \
-- \
-- (res) = __quot32; \
-- __mod32; })
--
--#define do_div(n, base) ({ \
-- unsigned long long __quot; \
-- unsigned long __mod; \
-- unsigned long long __div; \
-- unsigned long __upper, __low, __high, __base; \
-- \
-- __div = (n); \
-- __base = (base); \
-- \
-- __high = __div >> 32; \
-- __low = __div; \
-- __upper = __high; \
-- \
-- if (__high) \
-- __asm__("divu $0, %z2, %z3" \
-- : "=h" (__upper), "=l" (__high) \
-- : "Jr" (__high), "Jr" (__base) \
-- : GCC_REG_ACCUM); \
-- \
-- __mod = do_div64_32(__low, __upper, __low, __base); \
-- \
-- __quot = __high; \
-- __quot = __quot << 32 | __low; \
-- (n) = __quot; \
-- __mod; })
--
--#endif /* (_MIPS_SZLONG == 32) */
--
--#if (_MIPS_SZLONG == 64)
--
--/*
-- * Hey, we're already 64-bit, no
-- * need to play games..
-- */
--#define do_div(n, base) ({ \
-- unsigned long __quot; \
-- unsigned int __mod; \
-- unsigned long __div; \
-- unsigned int __base; \
-- \
-- __div = (n); \
-- __base = (base); \
-- \
-- __mod = __div % __base; \
-- __quot = __div / __base; \
-- \
-- (n) = __quot; \
-- __mod; })
-+#define __div64_32(n, base) \
-+({ \
-+ unsigned long __cf, __tmp, __tmp2, __i; \
-+ unsigned long __quot32, __mod32; \
-+ unsigned long __high, __low; \
-+ unsigned long long __n; \
-+ \
-+ __high = *__n >> 32; \
-+ __low = __n; \
-+ __asm__( \
-+ " .set push \n" \
-+ " .set noat \n" \
-+ " .set noreorder \n" \
-+ " move %2, $0 \n" \
-+ " move %3, $0 \n" \
-+ " b 1f \n" \
-+ " li %4, 0x21 \n" \
-+ "0: \n" \
-+ " sll $1, %0, 0x1 \n" \
-+ " srl %3, %0, 0x1f \n" \
-+ " or %0, $1, %5 \n" \
-+ " sll %1, %1, 0x1 \n" \
-+ " sll %2, %2, 0x1 \n" \
-+ "1: \n" \
-+ " bnez %3, 2f \n" \
-+ " sltu %5, %0, %z6 \n" \
-+ " bnez %5, 3f \n" \
-+ "2: \n" \
-+ " addiu %4, %4, -1 \n" \
-+ " subu %0, %0, %z6 \n" \
-+ " addiu %2, %2, 1 \n" \
-+ "3: \n" \
-+ " bnez %4, 0b\n\t" \
-+ " srl %5, %1, 0x1f\n\t" \
-+ " .set pop" \
-+ : "=&r" (__mod32), "=&r" (__tmp), \
-+ "=&r" (__quot32), "=&r" (__cf), \
-+ "=&r" (__i), "=&r" (__tmp2) \
-+ : "Jr" (base), "0" (__high), "1" (__low)); \
-+ \
-+ (__n) = __quot32; \
-+ __mod32; \
-+})
-
--#endif /* (_MIPS_SZLONG == 64) */
-+#endif /* BITS_PER_LONG == 64 */
-
--#endif /* _ASM_DIV64_H */
-+#endif /* __ASM_DIV64_H */
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