py/nlrx64: Correct the detection of Darwin ABI.
__APPLE__ tests for an Apple OS and __MACH__ tests that it is based on CMU
Mach.  Using both tests ensures that just Darwin is recognized.
@@ -58,7 +58,7 @@ unsigned int nlr_push(nlr_buf_t *nlr) {
#else
__asm volatile (
- #if defined(__APPLE__) || defined(__MACH__)
+ #if defined(__APPLE__) && defined(__MACH__)
"pop %rbp \n" // undo function's prelude
#endif
"movq (%rsp), %rax \n" // load return %rip
@@ -70,7 +70,7 @@ unsigned int nlr_push(nlr_buf_t *nlr) {
"movq %r13, 56(%rdi) \n" // store %r13 into nlr_buf
"movq %r14, 64(%rdi) \n" // store %r14 into nlr_buf
"movq %r15, 72(%rdi) \n" // store %r15 into nlr_buf
- #if defined(__APPLE__) || defined(__MACH__)
+ #if defined(__APPLE__) && defined(__MACH__)
"jmp _nlr_push_tail \n" // do the rest in C
#else
"jmp nlr_push_tail \n" // do the rest in C
