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 */ 28