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