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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/include/asm/div64.h
Initial import
Diffstat (limited to 'arch/mips/include/asm/div64.h')
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diff --git a/arch/mips/include/asm/div64.h b/arch/mips/include/asm/div64.h
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+++ b/arch/mips/include/asm/div64.h
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+/*
+ * Copyright (C) 2000, 2004 Maciej W. Rozycki
+ * Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#ifndef __ASM_DIV64_H
+#define __ASM_DIV64_H
+
+#include <asm-generic/div64.h>
+
+#if BITS_PER_LONG == 64
+
+#include <linux/types.h>
+
+/*
+ * No traps on overflows for any of these...
+ */
+
+#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 /* BITS_PER_LONG == 64 */
+
+#endif /* __ASM_DIV64_H */