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Add endian set for default toolchain (#2808)

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When default toolchain is used and architecture not listed in
"#if" in jerry-libm-internal.h on little endian around 90
test-suite tests, 4 unittests and 30 jerry-tests fails depending
on setup tested.
This change checks endians in case no toolchain is found and
sets __LITTLE_ENDIAN macro if it is little endian. This way
it will be set for any future arhitectures using little endian
and architecture that can have both big and little endian not
listed in jerry-libm-internal.h check.

JerryScript-DCO-1.0-Signed-off-by: Lidija Besker lidija.besker@rt-rk.com
This commit is contained in:
lidija-b 2019-04-12 16:32:58 +02:00 committed by László Langó
parent 09d8793e30
commit e944cdaa8b
1 changed files with 9 additions and 1 deletions
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10
jerry-libm/jerry-libm-internal.h
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@ -30,14 +30,22 @@
/* Sometimes it's necessary to define __LITTLE_ENDIAN explicitly
but these catch some common cases. */
#ifndef __LITTLE_ENDIAN
/* Check if compiler has byte order macro. Some older versions do not.
* If byte order is supported and set to little or target is among common
* cases checked define __LITTLE_ENDIAN.
*/
#if (defined (i386) || defined (__i386) || defined (__i386__) || \
defined (i486) || defined (__i486) || defined (__i486__) || \
defined (intel) || defined (x86) || defined (i86pc) || \
defined (__alpha) || defined (__osf__) || \
defined (__x86_64__) || defined (__arm__) || defined (__aarch64__) || \
defined (__xtensa__))
defined (__xtensa__) || defined (__MIPSEL)) || \
(defined (__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
#define __LITTLE_ENDIAN
#endif
#endif /* !__LITTLE_ENDIAN */
#ifdef __LITTLE_ENDIAN
#define __HI(x) *(1 + (int *) &x)