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#include <math-emu/single.h>
10
11int
12fdivs(void *frD, void *frA, void *frB)
13{
14 FP_DECL_D(A);
15 FP_DECL_D(B);
16 FP_DECL_D(R);
17 FP_DECL_EX;
18
19#ifdef DEBUG
20 printk("%s: %p %p %p\n", __func__, frD, frA, frB);
21#endif
22
23 FP_UNPACK_DP(A, frA);
24 FP_UNPACK_DP(B, frB);
25
26#ifdef DEBUG
27 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
28 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
29#endif
30
31 if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
32 FP_SET_EXCEPTION(EFLAG_VXZDZ);
33#ifdef DEBUG
34 printk("%s: FPSCR_VXZDZ raised\n", __func__);
35#endif
36 }
37 if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
38 FP_SET_EXCEPTION(EFLAG_VXIDI);
39#ifdef DEBUG
40 printk("%s: FPSCR_VXIDI raised\n", __func__);
41#endif
42 }
43
44 if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
45 FP_SET_EXCEPTION(EFLAG_DIVZERO);
46 if (__FPU_TRAP_P(EFLAG_DIVZERO))
47 return FP_CUR_EXCEPTIONS;
48 }
49
50 FP_DIV_D(R, A, B);
51
52#ifdef DEBUG
53 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
54#endif
55
56 __FP_PACK_DS(frD, R);
57
58 return FP_CUR_EXCEPTIONS;
59}
60

source code of linux/arch/powerpc/math-emu/fdivs.c