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08f43f9b | 1 | /* IFUNC resolver function for CPU specific functions. |
31556246 | 2 | 32/64 bit S/390 version. |
04277e02 | 3 | Copyright (C) 2015-2019 Free Software Foundation, Inc. |
08f43f9b AK |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <unistd.h> | |
21 | #include <dl-procinfo.h> | |
22 | ||
31556246 SL |
23 | #define S390_STFLE_BITS_Z10 34 /* General instructions extension */ |
24 | #define S390_STFLE_BITS_Z196 45 /* Distinct operands, pop ... */ | |
08f43f9b | 25 | |
31556246 SL |
26 | #define S390_IS_Z196(STFLE_BITS) \ |
27 | ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z196))) != 0) | |
08f43f9b | 28 | |
31556246 SL |
29 | #define S390_IS_Z10(STFLE_BITS) \ |
30 | ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z10))) != 0) | |
31 | ||
32 | #define S390_STORE_STFLE(STFLE_BITS) \ | |
33 | /* We want just 1 double word to be returned. */ \ | |
31cf3942 | 34 | register unsigned long reg0 __asm__("0") = 0; \ |
31556246 | 35 | \ |
31cf3942 SL |
36 | __asm__ __volatile__(".machine push" "\n\t" \ |
37 | ".machine \"z9-109\"" "\n\t" \ | |
38 | ".machinemode \"zarch_nohighgprs\"\n\t" \ | |
39 | "stfle %0" "\n\t" \ | |
40 | ".machine pop" "\n" \ | |
41 | : "=QS" (STFLE_BITS), "+d" (reg0) \ | |
42 | : : "cc"); | |
80190d2b | 43 | #define s390_libc_ifunc_expr_stfle_init() \ |
18d6c45e | 44 | unsigned long long stfle_bits = 0ULL; \ |
e8023f26 SL |
45 | if (__glibc_likely ((hwcap & HWCAP_S390_STFLE) \ |
46 | && (hwcap & HWCAP_S390_ZARCH) \ | |
47 | && (hwcap & HWCAP_S390_HIGH_GPRS))) \ | |
18d6c45e SL |
48 | { \ |
49 | S390_STORE_STFLE (stfle_bits); \ | |
50 | } | |
31556246 | 51 | |
51213e2b SL |
52 | #define s390_libc_ifunc_expr_init() |
53 | #define s390_libc_ifunc_expr(TYPE_FUNC, FUNC, EXPR) \ | |
54 | __ifunc (TYPE_FUNC, FUNC, EXPR, unsigned long int hwcap, \ | |
55 | s390_libc_ifunc_expr_init); |