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fb088911 RH |
1 | /* Machine-dependent software floating-point definitions. |
2 | Alpha userland IEEE 128-bit version. | |
04277e02 | 3 | Copyright (C) 2004-2019 Free Software Foundation, Inc. |
fb088911 RH |
4 | This file is part of the GNU C Library. |
5 | Contributed by Richard Henderson (rth@cygnus.com), | |
6 | Jakub Jelinek (jj@ultra.linux.cz) and | |
7 | David S. Miller (davem@redhat.com). | |
8 | ||
9 | The GNU C Library is free software; you can redistribute it and/or | |
10 | modify it under the terms of the GNU Lesser General Public | |
11 | License as published by the Free Software Foundation; either | |
12 | version 2.1 of the License, or (at your option) any later version. | |
13 | ||
14 | The GNU C Library is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff | 20 | License along with the GNU C Library. If not, see |
5a82c748 | 21 | <https://www.gnu.org/licenses/>. */ |
fb088911 RH |
22 | |
23 | #include <fenv_libc.h> | |
24 | ||
97d95c73 AJ |
25 | #define _FP_W_TYPE_SIZE 64 |
26 | #define _FP_W_TYPE unsigned long | |
27 | #define _FP_WS_TYPE signed long | |
28 | #define _FP_I_TYPE long | |
29 | ||
97d95c73 AJ |
30 | #define _FP_MUL_MEAT_S(R,X,Y) \ |
31 | _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) | |
32 | #define _FP_MUL_MEAT_D(R,X,Y) \ | |
fb088911 | 33 | _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) |
97d95c73 | 34 | #define _FP_MUL_MEAT_Q(R,X,Y) \ |
fb088911 | 35 | _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) |
97d95c73 AJ |
36 | |
37 | #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) | |
fb088911 | 38 | #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) |
97d95c73 AJ |
39 | #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) |
40 | ||
fb088911 RH |
41 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) |
42 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) | |
43 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 | |
44 | #define _FP_NANSIGN_S 0 | |
45 | #define _FP_NANSIGN_D 0 | |
46 | #define _FP_NANSIGN_Q 0 | |
97d95c73 AJ |
47 | |
48 | #define _FP_KEEPNANFRACP 1 | |
2848b105 | 49 | #define _FP_QNANNEGATEDP 0 |
fb088911 RH |
50 | |
51 | /* Alpha Architecture Handbook, 4.7.10.4 sez that we should prefer any | |
52 | type of NaN in Fb, then Fa. */ | |
53 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
54 | do { \ | |
55 | R##_s = Y##_s; \ | |
56 | _FP_FRAC_COPY_##wc(R,X); \ | |
57 | R##_c = FP_CLS_NAN; \ | |
97d95c73 | 58 | } while (0) |
fb088911 RH |
59 | |
60 | /* Rounding mode settings. */ | |
61 | #define FP_RND_NEAREST FE_TONEAREST | |
62 | #define FP_RND_ZERO FE_TOWARDZERO | |
63 | #define FP_RND_PINF FE_UPWARD | |
64 | #define FP_RND_MINF FE_DOWNWARD | |
65 | ||
66 | /* Obtain the current rounding mode. It's given as an argument to | |
67 | all the Ots functions, with 4 meaning "dynamic". */ | |
68 | #define FP_ROUNDMODE _round | |
69 | ||
70 | /* Exception flags. */ | |
71 | #define FP_EX_INVALID FE_INVALID | |
72 | #define FP_EX_OVERFLOW FE_OVERFLOW | |
73 | #define FP_EX_UNDERFLOW FE_UNDERFLOW | |
74 | #define FP_EX_DIVZERO FE_DIVBYZERO | |
75 | #define FP_EX_INEXACT FE_INEXACT | |
76 | ||
ace614b8 JM |
77 | #define _FP_TININESS_AFTER_ROUNDING 1 |
78 | ||
fb088911 RH |
79 | #define FP_INIT_ROUNDMODE \ |
80 | do { \ | |
81 | if (__builtin_expect (_round == 4, 0)) \ | |
82 | { \ | |
83 | unsigned long t; \ | |
84 | __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(t)); \ | |
85 | _round = (t >> FPCR_ROUND_SHIFT) & 3; \ | |
86 | } \ | |
87 | } while (0) | |
88 | ||
27bb6dc0 RH |
89 | /* We copy the libm function into libc for soft-fp. */ |
90 | extern int __feraiseexcept (int __excepts) attribute_hidden; | |
91 | ||
fb088911 RH |
92 | #define FP_HANDLE_EXCEPTIONS \ |
93 | do { \ | |
94 | if (__builtin_expect (_fex, 0)) \ | |
27bb6dc0 | 95 | __feraiseexcept (_fex); \ |
fb088911 | 96 | } while (0) |
5400a7d1 RH |
97 | |
98 | #define FP_TRAPPING_EXCEPTIONS \ | |
99 | ((__ieee_get_fp_control () & SWCR_ENABLE_MASK) << SWCR_ENABLE_SHIFT) |