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Add basic support for compiling on RISC OS

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This commit is contained in:
Cameron Cawley
2020-02-13 20:50:47 +00:00
parent 033aa51d87
commit 8f1a916ac5
8 changed files with 88 additions and 4 deletions
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14
src/atomic/SDL_spinlock.c
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@@ -32,6 +32,10 @@
#include <atomic.h>
#endif
#if !defined(HAVE_GCC_ATOMICS) && defined(__RISCOS__)
#include <unixlib/local.h>
#endif
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
#include <xmmintrin.h>
#endif
@@ -84,6 +88,16 @@ SDL_AtomicTryLock(SDL_SpinLock *lock)
defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5TE__) || \
defined(__ARM_ARCH_5TEJ__))
int result;
#if defined(__RISCOS__)
if (__cpucap_have_rex()) {
__asm__ __volatile__ (
"ldrex %0, [%2]\nteq %0, #0\nstrexeq %0, %1, [%2]"
: "=&r" (result) : "r" (1), "r" (lock) : "cc", "memory");
return (result == 0);
}
#endif
__asm__ __volatile__ (
"swp %0, %1, [%2]\n"
: "=&r,&r" (result) : "r,0" (1), "r,r" (lock) : "memory");