1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/types.h>
3*4882a593Smuzhiyun #include <linux/errno.h>
4*4882a593Smuzhiyun #include <linux/uaccess.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <asm/sfp-machine.h>
7*4882a593Smuzhiyun #include <math-emu/soft-fp.h>
8*4882a593Smuzhiyun #include <math-emu/double.h>
9*4882a593Smuzhiyun #include <math-emu/single.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun int
fnmsubs(void * frD,void * frA,void * frB,void * frC)12*4882a593Smuzhiyun fnmsubs(void *frD, void *frA, void *frB, void *frC)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun FP_DECL_D(R);
15*4882a593Smuzhiyun FP_DECL_D(A);
16*4882a593Smuzhiyun FP_DECL_D(B);
17*4882a593Smuzhiyun FP_DECL_D(C);
18*4882a593Smuzhiyun FP_DECL_D(T);
19*4882a593Smuzhiyun FP_DECL_EX;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #ifdef DEBUG
22*4882a593Smuzhiyun printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
23*4882a593Smuzhiyun #endif
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun FP_UNPACK_DP(A, frA);
26*4882a593Smuzhiyun FP_UNPACK_DP(B, frB);
27*4882a593Smuzhiyun FP_UNPACK_DP(C, frC);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun #ifdef DEBUG
30*4882a593Smuzhiyun printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
31*4882a593Smuzhiyun printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
32*4882a593Smuzhiyun printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
33*4882a593Smuzhiyun #endif
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
36*4882a593Smuzhiyun (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
37*4882a593Smuzhiyun FP_SET_EXCEPTION(EFLAG_VXIMZ);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun FP_MUL_D(T, A, C);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (B_c != FP_CLS_NAN)
42*4882a593Smuzhiyun B_s ^= 1;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
45*4882a593Smuzhiyun FP_SET_EXCEPTION(EFLAG_VXISI);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun FP_ADD_D(R, T, B);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (R_c != FP_CLS_NAN)
50*4882a593Smuzhiyun R_s ^= 1;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun #ifdef DEBUG
53*4882a593Smuzhiyun printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
54*4882a593Smuzhiyun #endif
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun __FP_PACK_DS(frD, R);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return FP_CUR_EXCEPTIONS;
59*4882a593Smuzhiyun }
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