ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libecb/ecb.h
(Generate patch)

Comparing libecb/ecb.h (file contents):
Revision 1.16 by root, Thu May 26 18:34:23 2011 UTC vs.
Revision 1.19 by root, Thu May 26 18:43:48 2011 UTC

1/* 1/*
2 * libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2011 Marc Alexander Lehmann 4 * Copyright (©) 2009-2011 Marc Alexander Lehmann
5 * Copyright (©) 2011 Emanuele Giaquinta 5 * Copyright (©) 2011 Emanuele Giaquinta
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
… …
32 32
33#include <inttypes.h> 33#include <inttypes.h>
34 34
35/* many compilers define _GNUC_ to some versions but then only implement 35/* many compilers define _GNUC_ to some versions but then only implement
36 * what their idiot authors think are the "more important" extensions, 36 * what their idiot authors think are the "more important" extensions,
37 * causing enourmous grief for some better fake benchmark numbers or so. 37 * causing enourmous grief in return for some better fake benchmark numbers.
38 * or so.
38 * we try to detect these and simply assume they are not gcc - if they have 39 * we try to detect these and simply assume they are not gcc - if they have
39 * an issue with that they should have done it right in the first place. 40 * an issue with that they should have done it right in the first place.
40 */ 41 */
41#ifndef ECB_GCC_VERSION 42#ifndef ECB_GCC_VERSION
42# if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) 43# if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__)
… …
95/* booleans, not the expression. */ 96/* booleans, not the expression. */
96#define ecb_unlikely(expr) ecb_expect (!!(expr), 0) 97#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)
97#define ecb_likely(expr) ecb_expect (!!(expr), 1) 98#define ecb_likely(expr) ecb_expect (!!(expr), 1)
98 99
99/* try to tell the compiler that some condition is definitely true */ 100/* try to tell the compiler that some condition is definitely true */
100#define ecb_assume(cond) do { if (!(cond)) unreachable (); } while (0) 101#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
101 102
102/* count trailing zero bits and count # of one bits */ 103/* count trailing zero bits and count # of one bits */
103#if ECB_GCC_VERSION(3,4) 104#if ECB_GCC_VERSION(3,4)
104#define ecb_ctz32 (x) __builtin_ctz (x) 105#define ecb_ctz32 (x) __builtin_ctz (x)
105#define ecb_popcount32 (x) __builtin_popcount (x) 106#define ecb_popcount32 (x) __builtin_popcount (x)
106#else 107#else
107ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; 108ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
108ECB_HEADER_INLINE 109ECB_HEADER_INLINE
109ecb_ctz32 (uint32_t x) 110ecb_ctz32 (uint32_t x)
110{ 111{
111 int r = 0; 112 int r = 0;
112 113
… …
150 151
151#if ECB_GCC_VERSION(4,5) 152#if ECB_GCC_VERSION(4,5)
152# define ecb_unreachable() __builtin_unreachable () 153# define ecb_unreachable() __builtin_unreachable ()
153#else 154#else
154/* this seems to work fine, but gcc always emits a warning for it :/ */ 155/* this seems to work fine, but gcc always emits a warning for it :/ */
155ECB_HEADER_INLINE void ecb_unreachable (void) ecb_attribute ((noreturn)); 156ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
156ECB_HEADER_INLINE void ecb_unreachable (void) { } 157ECB_HEADER_INLINE void ecb_unreachable (void) { }
157#endif 158#endif
158 159
159ECB_HEADER_INLINE unsigned char ecb_byteorder_helper () ecb_const; 160ECB_HEADER_INLINE unsigned char ecb_byteorder_helper () ecb_const;
160ECB_HEADER_INLINE unsigned char 161ECB_HEADER_INLINE unsigned char

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines