1 /* Machine-dependent software floating-point definitions.
2 Sparc64 userland (_Q_* and _Qp_*) version.
3 Copyright (C) 1997-2017 Free Software Foundation, Inc.
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).
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.
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.
19 You should have received a copy of the GNU Lesser General Public
20 License along with the GNU C Library; if not, see
21 <http://www.gnu.org/licenses/>. */
23 #include <fpu_control.h>
27 #define _FP_W_TYPE_SIZE 64
28 #define _FP_W_TYPE unsigned long
29 #define _FP_WS_TYPE signed long
30 #define _FP_I_TYPE long
32 /* Helper macros for _FP_MUL_MEAT_2_120_240_double. */
33 #define _FP_MUL_MEAT_SET_FE_TZ \
35 static fpu_control_t _fetz = _FPU_RC_DOWN; \
38 #ifndef _FP_MUL_MEAT_RESET_FE
39 #define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw)
42 #define _FP_MUL_MEAT_S(R,X,Y) \
43 _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
44 #define _FP_MUL_MEAT_D(R,X,Y) \
45 _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
46 #define _FP_MUL_MEAT_Q(R,X,Y) \
47 _FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y, \
48 _FP_MUL_MEAT_SET_FE_TZ, \
49 _FP_MUL_MEAT_RESET_FE)
51 #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
52 #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
53 #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
55 #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
56 #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1)
57 #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
58 #define _FP_NANSIGN_S 0
59 #define _FP_NANSIGN_D 0
60 #define _FP_NANSIGN_Q 0
62 #define _FP_KEEPNANFRACP 1
63 #define _FP_QNANNEGATEDP 0
65 /* If one NaN is signaling and the other is not,
66 * we choose that one, otherwise we choose Y.
68 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
70 if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \
71 && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
74 _FP_FRAC_COPY_##wc(R,X); \
79 _FP_FRAC_COPY_##wc(R,Y); \
84 /* Obtain the current rounding mode. */
86 #define FP_ROUNDMODE ((_fcw >> 30) & 0x3)
89 /* Exception flags. */
90 #define FP_EX_INVALID (1 << 4)
91 #define FP_EX_OVERFLOW (1 << 3)
92 #define FP_EX_UNDERFLOW (1 << 2)
93 #define FP_EX_DIVZERO (1 << 1)
94 #define FP_EX_INEXACT (1 << 0)
96 #define _FP_TININESS_AFTER_ROUNDING 0
99 fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30)
101 #define FP_INIT_ROUNDMODE \
106 #define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f)
107 #define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex)
109 /* Simulate exceptions using double arithmetics. */
110 extern void __Qp_handle_exceptions(int exc
);
112 #define FP_HANDLE_EXCEPTIONS \
116 /* This is the common case, so we do it inline. \
117 * We need to clear cexc bits if any. \
119 __asm__ __volatile__("fzero %%f62\n\t" \
120 "faddd %%f62, %%f62, %%f62" \
125 __Qp_handle_exceptions (_fex); \
129 #define QP_HANDLE_EXCEPTIONS(_a) \
131 if ((_fcw >> 23) & _fex) \
137 _fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex; \
142 #define QP_NO_EXCEPTIONS \
143 __asm ("fzero %%f62\n\t" \
144 "faddd %%f62, %%f62, %%f62" : : : "f62")
146 #define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62"
147 #define QP_CLOBBER_CC QP_CLOBBER , "cc"