1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/errno.h>
4 #include <linux/uaccess.h>
5 
6 #include <asm/sfp-machine.h>
7 #include <math-emu/soft-fp.h>
8 #include <math-emu/double.h>
9 
10 int
fmul(void * frD,void * frA,void * frB)11 fmul(void *frD, void *frA, void *frB)
12 {
13 	FP_DECL_D(A);
14 	FP_DECL_D(B);
15 	FP_DECL_D(R);
16 	FP_DECL_EX;
17 
18 #ifdef DEBUG
19 	printk("%s: %p %p %p\n", __func__, frD, frA, frB);
20 #endif
21 
22 	FP_UNPACK_DP(A, frA);
23 	FP_UNPACK_DP(B, frB);
24 
25 #ifdef DEBUG
26 	printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
27 	       A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
28 	printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
29 	       B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
30 #endif
31 
32 	if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
33 	    (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
34 		FP_SET_EXCEPTION(EFLAG_VXIMZ);
35 
36 	FP_MUL_D(R, A, B);
37 
38 #ifdef DEBUG
39 	printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
40 	       R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
41 #endif
42 
43 	__FP_PACK_D(frD, R);
44 
45 	return FP_CUR_EXCEPTIONS;
46 }
47