motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 00:33:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

Replace config-time define HOST_WORDS_BIGENDIAN

Browse source 
Replace a config-time define with a compile time condition
define (compatible with clang and gcc) that must be declared prior to
its usage. This avoids having a global configure time define, but also
prevents from bad usage, if the config header wasn't included before.

This can help to make some code independent from qemu too.

gcc supports __BYTE_ORDER__ from about 4.6 and clang from 3.2.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[ For the s390x parts I'm involved in ]
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220323155743.1585078-7-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2022-03-23 19:57:17 +04:00 • committed by Paolo Bonzini
parent 3f6c2e8b79
commit e03b56863d
84 changed files with 173 additions and 174 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/exec/cpu-all.h
View file

@ -34,13 +34,14 @@
/* some important defines:
*
* HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
* HOST_BIG_ENDIAN : whether the host cpu is big endian and
* otherwise little endian.
*
* TARGET_WORDS_BIGENDIAN : same for target cpu
* TARGET_WORDS_BIGENDIAN : if defined, the host cpu is big endian and otherwise
* little endian.
*/
#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
#if HOST_BIG_ENDIAN != defined(TARGET_WORDS_BIGENDIAN)
#define BSWAP_NEEDED
#endif

2
include/exec/cpu-common.h
View file

@ -46,7 +46,7 @@ enum device_endian {
DEVICE_LITTLE_ENDIAN,
};
#if defined(HOST_WORDS_BIGENDIAN)
#if HOST_BIG_ENDIAN
#define DEVICE_HOST_ENDIAN DEVICE_BIG_ENDIAN
#else
#define DEVICE_HOST_ENDIAN DEVICE_LITTLE_ENDIAN

2
include/exec/memop.h
View file

@ -28,7 +28,7 @@ typedef enum MemOp {
MO_SIGN = 0x08, /* Sign-extended, otherwise zero-extended. */
MO_BSWAP = 0x10, /* Host reverse endian. */
#ifdef HOST_WORDS_BIGENDIAN
#if HOST_BIG_ENDIAN
MO_LE = MO_BSWAP,
MO_BE = 0,
#else

2
include/exec/memory.h
View file

@ -2931,7 +2931,7 @@ static inline MemOp devend_memop(enum device_endian end)
QEMU_BUILD_BUG_ON(DEVICE_HOST_ENDIAN != DEVICE_LITTLE_ENDIAN &&
DEVICE_HOST_ENDIAN != DEVICE_BIG_ENDIAN);
#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
#if HOST_BIG_ENDIAN != defined(TARGET_WORDS_BIGENDIAN)
/* Swap if non-host endianness or native (target) endianness */
return (end == DEVICE_HOST_ENDIAN) ? 0 : MO_BSWAP;
#else