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Diffstat (limited to '')
| -rw-r--r-- | arch/m68k/include/asm/div64.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/div64.h b/arch/m68k/include/asm/div64.h new file mode 100644 index 000000000..365f39f5e --- /dev/null +++ b/arch/m68k/include/asm/div64.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _M68K_DIV64_H +#define _M68K_DIV64_H + +#ifdef CONFIG_CPU_HAS_NO_MULDIV64 +#include <asm-generic/div64.h> +#else + +#include <linux/types.h> + +/* n = n / base; return rem; */ + +#define do_div(n, base) ({ \ + union { \ + unsigned long n32[2]; \ + unsigned long long n64; \ + } __n; \ + unsigned long __rem, __upper; \ + unsigned long __base = (base); \ + \ + __n.n64 = (n); \ + if ((__upper = __n.n32[0])) { \ + asm ("divul.l %2,%1:%0" \ + : "=d" (__n.n32[0]), "=d" (__upper) \ + : "d" (__base), "0" (__n.n32[0])); \ + } \ + asm ("divu.l %2,%1:%0" \ + : "=d" (__n.n32[1]), "=d" (__rem) \ + : "d" (__base), "1" (__upper), "0" (__n.n32[1])); \ + (n) = __n.n64; \ + __rem; \ +}) + +#endif /* CONFIG_CPU_HAS_NO_MULDIV64 */ + +#endif /* _M68K_DIV64_H */ |