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