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1 /* Definitions of target machine for GNU compiler, for IBM S/390
2 Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 Contributed by Hartmut Penner (hpenner@de.ibm.com) and
4 Ulrich Weigand (uweigand@de.ibm.com).
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
29 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
30 #define EXPONENT_BIAS 1023
31 #define MANTISSA_BITS 52
32 #define PRECISION (MANTISSA_BITS + 1)
33 #define SIGNBIT 0x80000000
34 #define SIGN(fp) ((fp.l.upper) & SIGNBIT)
35 #define MANTD_LL(fp) ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
36 #define FRACD_LL(fp) (fp.ll & (HIDDEND_LL-1))
37 #define HIDDEND_LL ((UDItype_x)1 << 52)
39 typedef int DItype_x
__attribute__ ((mode (DI
)));
40 typedef unsigned int UDItype_x
__attribute__ ((mode (DI
)));
41 typedef int SItype_x
__attribute__ ((mode (SI
)));
42 typedef unsigned int USItype_x
__attribute__ ((mode (SI
)));
53 static __inline__
void
54 fexceptdiv (float d
, float e
)
56 __asm__
__volatile__ ("debr %0,%1" : : "f" (d
), "f" (e
) );
59 UDItype_x
__fixunsdfdi (double a1
);
61 /* convert double to unsigned int */
63 __fixunsdfdi (double a1
)
65 register union double_long dl1
;
71 /* +/- 0, denormalized */
79 C99 Annex F.4 requires an "invalid" exception to be thrown. */
80 if (EXPD (dl1
) >= EXPONENT_BIAS
)
81 fexceptdiv (0.0, 0.0);
85 exp
= EXPD (dl1
) - EXPONENT_BIAS
- MANTISSA_BITS
;
94 if ((EXPD(dl1
) == 0x7ff) && (FRACD_LL(dl1
) != 0)) /* NaN */
96 /* C99 Annex F.4 requires an "invalid" exception to be thrown. */
97 fexceptdiv (0.0, 0.0);
101 /* Number big number & + inf */
105 /* C99 Annex F.4 requires an "invalid" exception to be thrown. */
106 fexceptdiv (0.0, 0.0);
107 return 0xFFFFFFFFFFFFFFFFULL
;
112 /* shift down until exp < 12 or l = 0 */
120 #endif /* !__s390x__ */