sdl-ios-xcode: include/SDL_endian.h annotate

annotate include/SDL_endian.h @ 4286:9ea4413f0a9e SDL-1.2

Fixed bug #831 Andrey 2009-10-09 08:08:04 PDT gapi_hires_fix I made a mistake with the conclusions. And last time I as was mistaken with conclusions. Now I thought about in more detail the algorithm works. I have made it that the project fheroes2 well worked. The result of my work in attachment. I have a possibility to check up it on different models pocketpc. I checked various modes screen of 320x320, 320x240, 640x480, 800x400.

author	Sam Lantinga <slouken@libsdl.org>
date	Sat, 10 Oct 2009 02:03:53 +0000
parents	cd511a8560b7
children	124629b76853

rev	line source
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1 /*
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	2 SDL - Simple DirectMedia Layer
4159 a1b03ba2fcd0 Updated copyright date Sam Lantinga <slouken@libsdl.org> parents: 3909 diff changeset	3 Copyright (C) 1997-2009 Sam Lantinga
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	4
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	5 This library is free software; you can redistribute it and/or
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	6 modify it under the terms of the GNU Lesser General Public
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	9
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	13 Lesser General Public License for more details.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	14
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 1044 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	18
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	19 Sam Lantinga
251 b8688cfdc232 Updated the headers with the correct e-mail address Sam Lantinga <slouken@libsdl.org> parents: 0 diff changeset	20 slouken@libsdl.org
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	21 */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	22
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	23 /**
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	24 * @file SDL_endian.h
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	25 * Functions for reading and writing endian-specific values
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	26 */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	27
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	28 #ifndef _SDL_endian_h
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	29 #define _SDL_endian_h
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	30
1354 22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	31 #include "SDL_stdinc.h"
22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	32
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	33 /** @name SDL_ENDIANs
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	34 * The two types of endianness
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	35 */
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	36 /@{/
1354 22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	37 #define SDL_LIL_ENDIAN 1234
22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	38 #define SDL_BIG_ENDIAN 4321
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	39 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	40
1354 22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	41 #ifndef SDL_BYTEORDER /* Not defined in SDL_config.h? */
1474 351d757c7edd Maybe it's easier to collect the big-endian architectures. :) Sam Lantinga <slouken@libsdl.org> parents: 1469 diff changeset	42 #if defined(__hppa__) \|\| \
1475 d45aefcac017 Get Microsoft's preprocessor symbols in there Sam Lantinga <slouken@libsdl.org> parents: 1474 diff changeset	43 defined(__m68k__) \|\| defined(mc68000) \|\| defined(_M_M68K) \|\| \
1474 351d757c7edd Maybe it's easier to collect the big-endian architectures. :) Sam Lantinga <slouken@libsdl.org> parents: 1469 diff changeset	44 (defined(__MIPS__) && defined(__MISPEB__)) \|\| \
1475 d45aefcac017 Get Microsoft's preprocessor symbols in there Sam Lantinga <slouken@libsdl.org> parents: 1474 diff changeset	45 defined(__ppc__) \|\| defined(__POWERPC__) \|\| defined(_M_PPC) \|\| \
1474 351d757c7edd Maybe it's easier to collect the big-endian architectures. :) Sam Lantinga <slouken@libsdl.org> parents: 1469 diff changeset	46 defined(__sparc__)
351d757c7edd Maybe it's easier to collect the big-endian architectures. :) Sam Lantinga <slouken@libsdl.org> parents: 1469 diff changeset	47 #define SDL_BYTEORDER SDL_BIG_ENDIAN
351d757c7edd Maybe it's easier to collect the big-endian architectures. :) Sam Lantinga <slouken@libsdl.org> parents: 1469 diff changeset	48 #else
1354 22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	49 #define SDL_BYTEORDER SDL_LIL_ENDIAN
22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	50 #endif
22f39393668a Fixed build problem with SDL_string.c Sam Lantinga <slouken@libsdl.org> parents: 1353 diff changeset	51 #endif /* !SDL_BYTEORDER */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	52
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	53
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	54 #include "begin_code.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	55 /* Set up for C function definitions, even when using C++ */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	56 #ifdef __cplusplus
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	57 extern "C" {
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	58 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	59
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	60 /**
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	61 * @name SDL_Swap Functions
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	62 * Use inline functions for compilers that support them, and static
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	63 * functions for those that do not. Because these functions become
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	64 * static for compilers that do not support inline functions, this
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	65 * header should only be included in files that actually use them.
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	66 */
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	67 /@{/
1372 3e171fa5f4df Whoops Sam Lantinga <slouken@libsdl.org> parents: 1369 diff changeset	68 #if defined(__GNUC__) && defined(__i386__) && \
3909 6832b00d3594 Patched to compile on BeOS and old, old GCC releases. Ryan C. Gordon <icculus@icculus.org> parents: 1475 diff changeset	69 !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	70 static __inline__ Uint16 SDL_Swap16(Uint16 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	71 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	72 __asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	73 return x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	74 }
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	75 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	76 static __inline__ Uint16 SDL_Swap16(Uint16 x)
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	77 {
1033 aebfa3ce2a53 The fix is going back in. :) Sam Lantinga <slouken@libsdl.org> parents: 1031 diff changeset	78 __asm__("xchgb %b0,%h0" : "=Q" (x) : "0" (x));
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	79 return x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	80 }
859 6b28c91bf3d2 This works on MacOS X too. :) Sam Lantinga <slouken@libsdl.org> parents: 849 diff changeset	81 #elif defined(__GNUC__) && (defined(__powerpc__) \|\| defined(__ppc__))
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	82 static __inline__ Uint16 SDL_Swap16(Uint16 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	83 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	84 Uint16 result;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	85
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	86 __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	87 return result;
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	88 }
1044 d36ea7925763 Optimize also for 68020 and higher CPUs Patrice Mandin <patmandin@gmail.com> parents: 1033 diff changeset	89 #elif defined(__GNUC__) && (defined(__M68000__) \|\| defined(__M68020__))
985 cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	90 static __inline__ Uint16 SDL_Swap16(Uint16 x)
cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	91 {
cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	92 __asm__("rorw #8,%0" : "=d" (x) : "0" (x) : "cc");
cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	93 return x;
cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	94 }
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	95 #else
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	96 static __inline__ Uint16 SDL_Swap16(Uint16 x) {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	97 return((x<<8)\|(x>>8));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	98 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	99 #endif
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	100
3909 6832b00d3594 Patched to compile on BeOS and old, old GCC releases. Ryan C. Gordon <icculus@icculus.org> parents: 1475 diff changeset	101 #if defined(__GNUC__) && defined(__i386__) && \
6832b00d3594 Patched to compile on BeOS and old, old GCC releases. Ryan C. Gordon <icculus@icculus.org> parents: 1475 diff changeset	102 !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	103 static __inline__ Uint32 SDL_Swap32(Uint32 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	104 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	105 __asm__("bswap %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	106 return x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	107 }
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	108 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	109 static __inline__ Uint32 SDL_Swap32(Uint32 x)
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	110 {
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	111 __asm__("bswapl %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	112 return x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	113 }
859 6b28c91bf3d2 This works on MacOS X too. :) Sam Lantinga <slouken@libsdl.org> parents: 849 diff changeset	114 #elif defined(__GNUC__) && (defined(__powerpc__) \|\| defined(__ppc__))
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	115 static __inline__ Uint32 SDL_Swap32(Uint32 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	116 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	117 Uint32 result;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	118
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	119 __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	120 __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	121 __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	122 return result;
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	123 }
1044 d36ea7925763 Optimize also for 68020 and higher CPUs Patrice Mandin <patmandin@gmail.com> parents: 1033 diff changeset	124 #elif defined(__GNUC__) && (defined(__M68000__) \|\| defined(__M68020__))
994 c4e5473672b6 Wrong size of parameters for SDL_Swap32 m68k assembly routine Patrice Mandin <patmandin@gmail.com> parents: 985 diff changeset	125 static __inline__ Uint32 SDL_Swap32(Uint32 x)
985 cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	126 {
1044 d36ea7925763 Optimize also for 68020 and higher CPUs Patrice Mandin <patmandin@gmail.com> parents: 1033 diff changeset	127 __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0" : "=d" (x) : "0" (x) : "cc");
985 cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	128 return x;
cec525374267 Add m68k assembly routines for endianness conversion Patrice Mandin <patmandin@gmail.com> parents: 859 diff changeset	129 }
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	130 #else
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	131 static __inline__ Uint32 SDL_Swap32(Uint32 x) {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	132 return((x<<24)\|((x<<8)&0x00FF0000)\|((x>>8)&0x0000FF00)\|(x>>24));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	133 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	134 #endif
848 85af65457959 Avoid using kernel internal headers Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	135
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	136 #ifdef SDL_HAS_64BIT_TYPE
3909 6832b00d3594 Patched to compile on BeOS and old, old GCC releases. Ryan C. Gordon <icculus@icculus.org> parents: 1475 diff changeset	137 #if defined(__GNUC__) && defined(__i386__) && \
6832b00d3594 Patched to compile on BeOS and old, old GCC releases. Ryan C. Gordon <icculus@icculus.org> parents: 1475 diff changeset	138 !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	139 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	140 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	141 union {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	142 struct { Uint32 a,b; } s;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	143 Uint64 u;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	144 } v;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	145 v.u = x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	146 __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	147 : "=r" (v.s.a), "=r" (v.s.b)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	148 : "0" (v.s.a), "1" (v.s.b));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	149 return v.u;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	150 }
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	151 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	152 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	153 {
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	154 __asm__("bswapq %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	155 return x;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	156 }
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	157 #else
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	158 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	159 {
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	160 Uint32 hi, lo;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	161
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	162 /* Separate into high and low 32-bit values and swap them */
4283 cd511a8560b7 Ozkan Sezer 2009-04-01 23:17:13 PDT Sam Lantinga <slouken@libsdl.org> parents: 4217 diff changeset	163 lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	164 x >>= 32;
4283 cd511a8560b7 Ozkan Sezer 2009-04-01 23:17:13 PDT Sam Lantinga <slouken@libsdl.org> parents: 4217 diff changeset	165 hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
849 bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	166 x = SDL_Swap32(lo);
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	167 x <<= 32;
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	168 x \|= SDL_Swap32(hi);
bab227101de4 Added inline byte swapping code for other architectures Sam Lantinga <slouken@libsdl.org> parents: 848 diff changeset	169 return(x);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	170 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	171 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	172 #else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	173 /* This is mainly to keep compilers from complaining in SDL code.
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	174 * If there is no real 64-bit datatype, then compilers will complain about
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	175 * the fake 64-bit datatype that SDL provides when it compiles user code.
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	176 */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	177 #define SDL_Swap64(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	178 #endif /* SDL_HAS_64BIT_TYPE */
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	179 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	180
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	181 /**
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	182 * @name SDL_SwapLE and SDL_SwapBE Functions
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	183 * Byteswap item from the specified endianness to the native endianness
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	184 */
4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	185 /@{/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	186 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	187 #define SDL_SwapLE16(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	188 #define SDL_SwapLE32(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	189 #define SDL_SwapLE64(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	190 #define SDL_SwapBE16(X) SDL_Swap16(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	191 #define SDL_SwapBE32(X) SDL_Swap32(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	192 #define SDL_SwapBE64(X) SDL_Swap64(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	193 #else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	194 #define SDL_SwapLE16(X) SDL_Swap16(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	195 #define SDL_SwapLE32(X) SDL_Swap32(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	196 #define SDL_SwapLE64(X) SDL_Swap64(X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	197 #define SDL_SwapBE16(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	198 #define SDL_SwapBE32(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	199 #define SDL_SwapBE64(X) (X)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	200 #endif
4217 4c4113c2162c Fixed bug #706 Sam Lantinga <slouken@libsdl.org> parents: 4159 diff changeset	201 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	202
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	203 /* Ends C function definitions when using C++ */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	204 #ifdef __cplusplus
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	205 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	206 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	207 #include "close_code.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	208
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	209 #endif /* _SDL_endian_h */

Mercurial > sdl-ios-xcode

annotate include/SDL_endian.h @ 4286:9ea4413f0a9e SDL-1.2