ObjFW  Check-in [93e23b476c]

Overview
Comment:Add atomic ops assembly implementation for PowerPC
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SHA3-256: 93e23b476c4048e60b5958b6edb520f21f4fc1ab5e111b2b610a74d69f98902a
User & Date: js on 2014-05-07 03:19:41
Other Links: manifest | tags
Context
2014-05-14
13:12
Add a few more flags to Xcode project check-in: adaacf60ef user: js tags: trunk
2014-05-07
03:19
Add atomic ops assembly implementation for PowerPC check-in: 93e23b476c user: js tags: trunk
02:46
atomic.h: Minor style improvements check-in: 461e70403e user: js tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified configure.ac from [7cdaa767b1] to [06637d6b73].

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	], [
		AC_MSG_RESULT(no)
	])

	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
	AC_EGREP_CPP(yes, [
		#if defined(__GNUC__) && (defined(__i386__) || \
			defined(__x86_64__) || defined(__amd64__))

		yes
		#endif
	], [
		AC_MSG_RESULT(yes)
		test x"$atomic_ops" = x"none" && \
			atomic_ops="assembly implementation"
	], [








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	], [
		AC_MSG_RESULT(no)
	])

	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
	AC_EGREP_CPP(yes, [
		#if defined(__GNUC__) && (defined(__i386__) || \
			defined(__x86_64__) || defined(__amd64__)) ||
			defined(__ppc__)
		yes
		#endif
	], [
		AC_MSG_RESULT(yes)
		test x"$atomic_ops" = x"none" && \
			atomic_ops="assembly implementation"
	], [
︙︙

Modified src/atomic.h from [1f71674619] to [e98a87dd4f].

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		    "addq	%1, %0"
		    : "+&r"(i)
		    : "r"(i), "m"(*p)
		);
# endif
	else
		abort();













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int_add not implemented!
#endif








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		    "addq	%1, %0"
		    : "+&r"(i)
		    : "r"(i), "m"(*p)
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "add	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int_add not implemented!
#endif
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	__asm__ __volatile__ (
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "addl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int32_add not implemented!
#endif








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	__asm__ __volatile__ (
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "addl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "add	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int32_add not implemented!
#endif
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	__asm__ __volatile__ (
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "addl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);













	return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
	return (void*)OSAtomicAdd64Barrier(i, (int64_t*)p);
# else
	return (void*)OSAtomicAdd32Barrier(i, (int32_t*)p);








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	__asm__ __volatile__ (
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "addl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);

	return (void*)i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "add	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
	return (void*)OSAtomicAdd64Barrier(i, (int64_t*)p);
# else
	return (void*)OSAtomicAdd32Barrier(i, (int32_t*)p);
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		    "subq	%1, %0"
		    : "+&r"(i)
		    : "r"(i), "m"(*p)
		);
# endif
	else
		abort();













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int_sub not implemented!
#endif








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		    "subq	%1, %0"
		    : "+&r"(i)
		    : "r"(i), "m"(*p)
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "sub	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int_sub not implemented!
#endif
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	    "negl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "subl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int32_sub not implemented!
#endif








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	    "negl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "subl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "sub	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int32_sub not implemented!
#endif
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	    "negl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "subl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);













	return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
	return (void*)OSAtomicAdd64Barrier(-i, (int64_t*)p);
# else
	return (void*)OSAtomicAdd32Barrier(-i, (int32_t*)p);








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	    "negl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %2\n\t"
	    "subl	%1, %0"
	    : "+&r"(i)
	    : "r"(i), "m"(*p)
	);

	return (void*)i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "sub	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
	return (void*)OSAtomicAdd64Barrier(-i, (int64_t*)p);
# else
	return (void*)OSAtomicAdd32Barrier(-i, (int32_t*)p);
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		    "incq	%0"
		    : "=&r"(i)
		    : "m"(*p)
		);
# endif
	else
		abort();















	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int_inc not implemented!
#endif








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		    "incq	%0"
		    : "=&r"(i)
		    : "m"(*p)
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	int i;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %1\n\t"
	    "addi	%0, %0, 1\n\t"
	    "stwcx.	%0, 0, %1\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int_inc not implemented!
#endif
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	    "incl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %1\n\t"
	    "incl	%0"
	    : "=&r"(i)
	    : "m"(*p)
	);















	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int32_inc not implemented!
#endif








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	    "incl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %1\n\t"
	    "incl	%0"
	    : "=&r"(i)
	    : "m"(*p)
	);

	return i;
#elif defined(OF_PPC_ASM)
	int32_t i;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %1\n\t"
	    "addi	%0, %0, 1\n\t"
	    "stwcx.	%0, 0, %1\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int32_inc not implemented!
#endif
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		    "decq	%0"
		    : "=&r"(i)
		    : "m"(*p)
		);
# endif
	else
		abort();















	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int_dec not implemented!
#endif








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		    "decq	%0"
		    : "=&r"(i)
		    : "m"(*p)
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	int i;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %1\n\t"
	    "subi	%0, %0, 1\n\t"
	    "stwcx.	%0, 0, %1\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int_dec not implemented!
#endif
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	    "decl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %1\n\t"
	    "decl	%0"
	    : "=&r"(i)
	    : "m"(*p)
	);















	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int32_dec not implemented!
#endif








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	    "decl	%0\n\t"
	    "lock\n\t"
	    "xaddl	%0, %1\n\t"
	    "decl	%0"
	    : "=&r"(i)
	    : "m"(*p)
	);

	return i;
#elif defined(OF_PPC_ASM)
	int32_t i;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %1\n\t"
	    "subi	%0, %0, 1\n\t"
	    "stwcx.	%0, 0, %1\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int32_dec not implemented!
#endif
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		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int_or not implemented!
#endif








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		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "or		%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int_or not implemented!
#endif
︙︙
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	    "lock\n\t"
	    "cmpxchg	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int32_or not implemented!
#endif








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	    "lock\n\t"
	    "cmpxchg	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "or		%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int32_or not implemented!
#endif
︙︙
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		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int_and not implemented!
#endif








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659
660

		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "and	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int_and not implemented!
#endif
︙︙
512
513
514
515
516
517
518












519
520
521
522
523
524
525

	    "lock\n\t"
	    "cmpxchg	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int32_and not implemented!
#endif








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>








676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701

	    "lock\n\t"
	    "cmpxchg	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "and	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int32_and not implemented!
#endif
︙︙
559
560
561
562
563
564
565












566
567
568
569
570
571
572

		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int_xor not implemented!
#endif








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735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760

		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
# endif
	else
		abort();

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "xor	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int_xor not implemented!
#endif
︙︙
588
589
590
591
592
593
594












595
596
597
598
599
600
601

	    "lock\n\t"
	    "cmpxchgl	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);













	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int32_xor not implemented!
#endif








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>








776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801

	    "lock\n\t"
	    "cmpxchgl	%0, %2\n\t"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %2\n\t"
	    "xor	%0, %0, %1\n\t"
	    "stwcx.	%0, 0, %2\n\t"
	    "bne-	0b"
	    : "=&r"(i)
	    : "r"(i), "r"(p)
	);

	return i;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int32_xor not implemented!
#endif
︙︙
621
622
623
624
625
626
627






















628
629
630
631
632
633
634

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);























	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwapIntBarrier(o, n, p);
#else
# error of_atomic_int_cmpswap not implemented!
#endif








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>








821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);

	return r;
#elif defined(OF_PPC_ASM)
	int r;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %3\n\t"
	    "cmpw	%0, %1\n\t"
	    "bne	1f\n\t"
	    "stwcx.	%2, 0, %3\n\t"
	    "bne-	0b\n\t"
	    "li		%0, 1\n\t"
	    "b		2f\n\t"
	    "1:\n\t"
	    "stwcx.	%0, 0, %3\n\t"
	    "li		%0, 0\n\t"
	    "2:"
	    : "=&r"(r)
	    : "r"(o), "r"(n), "r"(p)
	    : "cc"
	);

	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwapIntBarrier(o, n, p);
#else
# error of_atomic_int_cmpswap not implemented!
#endif
︙︙
654
655
656
657
658
659
660






















661
662
663
664
665
666
667

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);























	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwap32Barrier(o, n, p);
#else
# error of_atomic_int32_cmpswap not implemented!
#endif








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>








876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);

	return r;
#elif defined(OF_PPC_ASM)
	int r;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %3\n\t"
	    "cmpw	%0, %1\n\t"
	    "bne	1f\n\t"
	    "stwcx.	%2, 0, %3\n\t"
	    "bne-	0b\n\t"
	    "li		%0, 1\n\t"
	    "b		2f\n\t"
	    "1:\n\t"
	    "stwcx.	%0, 0, %3\n\t"
	    "li		%0, 0\n\t"
	    "2:"
	    : "=&r"(r)
	    : "r"(o), "r"(n), "r"(p)
	    : "cc"
	);

	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwap32Barrier(o, n, p);
#else
# error of_atomic_int32_cmpswap not implemented!
#endif
︙︙
687
688
689
690
691
692
693






















694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709




710
711
712
713
714
715
716

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);























	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwapPtrBarrier(o, n, p);
#else
# error of_atomic_ptr_cmpswap not implemented!
#endif
}

static OF_INLINE void
of_memory_barrier(void)
{
#if !defined(OF_HAVE_THREADS)
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
	__asm__ __volatile__ (
	    "mfence"




	);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
	__sync_synchronize();
#elif defined(OF_HAVE_OSATOMIC)
	OSMemoryBarrier();
#else
# error of_memory_barrier not implemented!








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>
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>








931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986

	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&d"(r), "+a"(o)	/* use d instead of r to avoid a gcc bug */
	    : "r"(n), "m"(*p)
	    : "cc"
	);

	return r;
#elif defined(OF_PPC_ASM)
	int r;

	__asm__ __volatile__ (
	    "0:\n\t"
	    "lwarx	%0, 0, %3\n\t"
	    "cmpw	%0, %1\n\t"
	    "bne	1f\n\t"
	    "stwcx.	%2, 0, %3\n\t"
	    "bne-	0b\n\t"
	    "li		%0, 1\n\t"
	    "b		2f\n\t"
	    "1:\n\t"
	    "stwcx.	%0, 0, %3\n\t"
	    "li		%0, 0\n\t"
	    "2:"
	    : "=&r"(r)
	    : "r"(o), "r"(n), "r"(p)
	    : "cc"
	);

	return r;
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwapPtrBarrier(o, n, p);
#else
# error of_atomic_ptr_cmpswap not implemented!
#endif
}

static OF_INLINE void
of_memory_barrier(void)
{
#if !defined(OF_HAVE_THREADS)
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
	__asm__ __volatile__ (
	    "mfence"
	);
#elif defined(OF_PPC_ASM)
	__asm__ __volatile__ (
	    "sync"
	);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
	__sync_synchronize();
#elif defined(OF_HAVE_OSATOMIC)
	OSMemoryBarrier();
#else
# error of_memory_barrier not implemented!
︙︙