| 1 | /* |
1 | /* |
| 2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | * |
5 | * |
| 6 | * Deliantra is free software: you can redistribute it and/or modify it under |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
| 7 | * the terms of the Affero GNU General Public License as published by the |
7 | * the terms of the Affero GNU General Public License as published by the |
| 8 | * Free Software Foundation, either version 3 of the License, or (at your |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
| 9 | * option) any later version. |
9 | * option) any later version. |
| … | |
… | |
| 29 | # define attribute(attrlist) __attribute__(attrlist) |
29 | # define attribute(attrlist) __attribute__(attrlist) |
| 30 | #else |
30 | #else |
| 31 | # define attribute(attrlist) |
31 | # define attribute(attrlist) |
| 32 | #endif |
32 | #endif |
| 33 | |
33 | |
| 34 | #if GCC_VERSION(3,0) |
34 | #if GCC_VERSION(3,1) |
| 35 | # define is_constant(c) __builtin_constant_p (c) |
35 | # define is_constant(c) __builtin_constant_p (c) |
| 36 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
36 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
| 37 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
37 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 38 | # define noinline __attribute__((__noinline__)) |
38 | # define noinline __attribute__((__noinline__)) |
| 39 | #else |
39 | #else |
| … | |
… | |
| 47 | # define decltype(x) __decltype(x) |
47 | # define decltype(x) __decltype(x) |
| 48 | #elif GCC_VERSION(3,0) |
48 | #elif GCC_VERSION(3,0) |
| 49 | # define decltype(x) typeof(x) |
49 | # define decltype(x) typeof(x) |
| 50 | #endif |
50 | #endif |
| 51 | |
51 | |
|
|
52 | #define func_const attribute ((const)) |
|
|
53 | #define func_pure attribute ((pure)) |
|
|
54 | #define func_hot attribute ((hot)) // 4.x |
|
|
55 | #define func_cold attribute ((cold)) // 4.x |
|
|
56 | |
| 52 | #if GCC_VERSION(4,5) |
57 | #if GCC_VERSION(4,5) |
| 53 | # define unreachable() __builtin_unreachable () |
58 | # define unreachable() __builtin_unreachable () |
| 54 | #else |
59 | #else |
| 55 | // this seems to work fine, but gcc always emits a warning for it :/ |
60 | // this seems to work fine, but gcc always emits a warning for it :/ |
| 56 | static inline void unreachable () attribute ((noreturn)); |
61 | static inline void unreachable () attribute ((noreturn)); |
| … | |
… | |
| 61 | // is mostly true or mosty false. note that these return |
66 | // is mostly true or mosty false. note that these return |
| 62 | // booleans, not the expression. |
67 | // booleans, not the expression. |
| 63 | #define expect_false(expr) expect ((expr) ? 1 : 0, 0) |
68 | #define expect_false(expr) expect ((expr) ? 1 : 0, 0) |
| 64 | #define expect_true(expr) expect ((expr) ? 1 : 0, 1) |
69 | #define expect_true(expr) expect ((expr) ? 1 : 0, 1) |
| 65 | |
70 | |
| 66 | // try to tell the compiler tat some condition is definitely true |
71 | // try to tell the compiler that some condition is definitely true |
| 67 | #define assume(cond) do { if (!(cond)) unreachable (); } while (0) |
72 | #define assume(cond) do { if (!(cond)) unreachable (); } while (0) |
| 68 | |
73 | |
| 69 | #endif |
74 | #endif |
| 70 | |
75 | |
