| /* 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 */ |