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9f888890 | 1 | /* High precision, low overhead timing functions. Alpha version. |
2b778ceb | 2 | Copyright (C) 2001-2021 Free Software Foundation, Inc. |
9f888890 | 3 | This file is part of the GNU C Library. |
9f888890 UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
9f888890 | 18 | |
1e372ded AZ |
19 | #ifndef _HP_TIMING_ALPHA_H |
20 | #define _HP_TIMING_ALPHA_H 1 | |
9f888890 | 21 | |
1e372ded | 22 | #if IS_IN(rtld) |
9f888890 UD |
23 | /* We always have the timestamp register, but it's got only a 4 second |
24 | range. Use it for ld.so profiling only. */ | |
1e372ded | 25 | # define HP_TIMING_INLINE (1) |
9f888890 UD |
26 | |
27 | /* We use 32 bit values for the times. */ | |
28 | typedef unsigned int hp_timing_t; | |
29 | ||
9f888890 UD |
30 | /* The "rpcc" instruction returns a 32-bit counting half and a 32-bit |
31 | "virtual cycle counter displacement". Subtracting the two gives us | |
32 | a virtual cycle count. */ | |
1e372ded | 33 | # define HP_TIMING_NOW(VAR) \ |
9f888890 UD |
34 | do { \ |
35 | unsigned long int x_; \ | |
36 | asm volatile ("rpcc %0" : "=r"(x_)); \ | |
37 | (VAR) = (int) (x_) - (int) (x_ >> 32); \ | |
38 | } while (0) | |
1e372ded | 39 | # include <hp-timing-common.h> |
9f888890 | 40 | |
1e372ded AZ |
41 | #else |
42 | # include <sysdeps/generic/hp-timing.h> | |
43 | #endif /* IS_IN(rtld) */ | |
9f888890 UD |
44 | |
45 | #endif /* hp-timing.h */ |