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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_M68K_LIBGCC_H
3#define __ASM_M68K_LIBGCC_H
4
5#ifndef CONFIG_CPU_HAS_NO_MULDIV64
6/*
7 * For those 68K CPUs that support 64bit multiply define umul_ppm()
8 * for the common muldi3 libgcc helper function (in lib/muldi3.c).
9 * CPUs that don't have it (like the original 68000 and ColdFire)
10 * will fallback to using the C-coded version of umul_ppmm().
11 */
12#define umul_ppmm(w1, w0, u, v) \
13 do { \
14 unsigned long __u = (u), __v = (v); \
15 unsigned long __w0, __w1; \
16 \
17 __asm__ ("mulu%.l %3,%1:%0" \
18 : "=d" (__w0), \
19 "=d" (__w1) \
20 : "%0" (__u), \
21 "dmi" (__v)); \
22 \
23 (w0) = __w0; (w1) = __w1; \
24 } while (0)
25#endif /* !CONFIG_CPU_HAS_NO_MULDIV64 */
26
27#endif /* __ASM_M68K_LIBGCC_H */