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arm: intreadwrite: revert 16-bit load asm to old version for gcc < 4.6

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Commit adebad0 "arm: intreadwrite: fix inline asm constraints for gcc
4.6 and later" caused some older gcc versions to miscompile code.
This reverts to the old version of the code for these compilers.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2012-05-03 19:14:16 +01:00
parent 58b2e0f0f2
commit c02efacc8f
1 changed files with 3 additions and 1 deletions
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4
libavutil/arm/intreadwrite.h
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@ -30,7 +30,9 @@ static av_always_inline unsigned AV_RN16(const void *p)
{
const uint8_t *q = p;
unsigned v;
#ifdef __thumb__
#if !AV_GCC_VERSION_AT_LEAST(4,6)
__asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)q));
#elif defined __thumb__
__asm__ ("ldrh %0, %1" : "=r"(v) : "m"(q[0]), "m"(q[1]));
#else
__asm__ ("ldrh %0, %1" : "=r"(v) : "Uq"(q[0]), "m"(q[1]));