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Check whether assembler supports numerical local labels.
2007-11-18 Matthias Clasen <mclasen@redhat.com>
* configure.in: Check whether assembler supports numerical local
labels.
* glib/gatomic.c: Fix powerpc implementation of atomic ops for
platforms where the assembler doesn't support numerical local
labels. (#445362)
svn path=/trunk/; revision=5861
This commit is contained in:
Matthias Clasen
Matthias Clasen
parent
1e2c77ecbc
commit
79668cdf02
13
ChangeLog
13
ChangeLog
@ -1,4 +1,13 @@
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2006-11-15 Ryan Lortie <desrt@desrt.ca>
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2007-11-18 Matthias Clasen <mclasen@redhat.com>
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* configure.in: Check whether assembler supports numerical local
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labels.
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* glib/gatomic.c: Fix powerpc implementation of atomic ops for
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platforms where the assembler doesn't support numerical local
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labels. (#445362)
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2007-11-15 Ryan Lortie <desrt@desrt.ca>
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* docs/reference/glib/tmpl/markup.sgml:
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* glib/gmarkup.h:
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@ -8,7 +17,7 @@
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Closes #496046.
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2006-11-15 Ryan Lortie <desrt@desrt.ca>
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2007-11-15 Ryan Lortie <desrt@desrt.ca>
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* docs/reference/glib/glib-sections.txt:
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* glib/glib.symbols:
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11
configure.in
11
configure.in
@ -2082,6 +2082,17 @@ if test x"$GCC" = xyes; then
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AC_DEFINE_UNQUOTED(G_ATOMIC_POWERPC, 1,
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[powerpc atomic implementation])
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glib_memory_barrier_needed=yes
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AC_MSG_CHECKING([whether asm supports numbered local labels])
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AC_TRY_COMPILE(
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,[
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__asm__ __volatile__ ("1: nop\n"
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" bne- 1b")
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],[
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AC_DEFINE_UNQUOTED(ASM_NUMERIC_LABELS, 1, [define if asm blocks can use numeric local labels])
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AC_MSG_RESULT([yes])
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],[
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AC_MSG_RESULT([no])
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])
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;;
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ia64)
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AC_MSG_RESULT([ia64])
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@ -281,6 +281,15 @@ g_atomic_int_exchange_and_add (volatile gint *atomic,
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gint val)
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{
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gint result, temp;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("1: lwarx %0,0,%3\n"
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" add %1,%0,%4\n"
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" stwcx. %1,0,%3\n"
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" bne- 1b"
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: "=&b" (result), "=&r" (temp), "=m" (*atomic)
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: "b" (atomic), "r" (val), "m" (*atomic)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ (".Lieaa%=: lwarx %0,0,%3\n"
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" add %1,%0,%4\n"
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" stwcx. %1,0,%3\n"
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@ -288,6 +297,7 @@ g_atomic_int_exchange_and_add (volatile gint *atomic,
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: "=&b" (result), "=&r" (temp), "=m" (*atomic)
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: "b" (atomic), "r" (val), "m" (*atomic)
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: "cr0", "memory");
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#endif
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return result;
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}
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@ -297,6 +307,15 @@ g_atomic_int_add (volatile gint *atomic,
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gint val)
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{
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gint result, temp;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("1: lwarx %0,0,%3\n"
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" add %1,%0,%4\n"
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" stwcx. %1,0,%3\n"
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" bne- 1b"
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: "=&b" (result), "=&r" (temp), "=m" (*atomic)
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: "b" (atomic), "r" (val), "m" (*atomic)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ (".Lia%=: lwarx %0,0,%3\n"
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" add %1,%0,%4\n"
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" stwcx. %1,0,%3\n"
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@ -304,6 +323,7 @@ g_atomic_int_add (volatile gint *atomic,
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: "=&b" (result), "=&r" (temp), "=m" (*atomic)
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: "b" (atomic), "r" (val), "m" (*atomic)
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: "cr0", "memory");
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#endif
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}
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# else /* !__OPTIMIZE__ */
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gint
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@ -336,6 +356,18 @@ g_atomic_int_compare_and_exchange (volatile gint *atomic,
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gint newval)
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{
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gint result;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("sync\n"
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"1: lwarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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" bne 2f\n"
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" stwcx. %3,0,%1\n"
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" bne- 1b\n"
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"2: isync"
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ ("sync\n"
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".L1icae%=: lwarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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@ -346,6 +378,7 @@ g_atomic_int_compare_and_exchange (volatile gint *atomic,
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#endif
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return result == 0;
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}
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@ -355,6 +388,18 @@ g_atomic_pointer_compare_and_exchange (volatile gpointer *atomic,
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gpointer newval)
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{
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gpointer result;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("sync\n"
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"1: lwarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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" bne 2f\n"
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" stwcx. %3,0,%1\n"
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" bne- 1b\n"
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"2: isync"
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ ("sync\n"
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".L1pcae%=: lwarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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@ -365,6 +410,7 @@ g_atomic_pointer_compare_and_exchange (volatile gpointer *atomic,
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#endif
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return result == 0;
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}
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# elif GLIB_SIZEOF_VOID_P == 8 /* 64-bit system */
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@ -374,6 +420,19 @@ g_atomic_int_compare_and_exchange (volatile gint *atomic,
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gint newval)
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{
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gpointer result;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("sync\n"
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"1: lwarx %0,0,%1\n"
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" extsw %0,%0\n"
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" subf. %0,%2,%0\n"
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" bne 2f\n"
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" stwcx. %3,0,%1\n"
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" bne- 1b\n"
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"2: isync"
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ ("sync\n"
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".L1icae%=: lwarx %0,0,%1\n"
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" extsw %0,%0\n"
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@ -385,6 +444,7 @@ g_atomic_int_compare_and_exchange (volatile gint *atomic,
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#endif
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return result == 0;
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}
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@ -394,6 +454,18 @@ g_atomic_pointer_compare_and_exchange (volatile gpointer *atomic,
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gpointer newval)
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{
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gpointer result;
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#if ASM_NUMERIC_LABELS
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__asm__ __volatile__ ("sync\n"
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"1: ldarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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" bne 2f\n"
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" stdcx. %3,0,%1\n"
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" bne- 1b\n"
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"2: isync"
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#else
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__asm__ __volatile__ ("sync\n"
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".L1pcae%=: ldarx %0,0,%1\n"
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" subf. %0,%2,%0\n"
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@ -404,6 +476,7 @@ g_atomic_pointer_compare_and_exchange (volatile gpointer *atomic,
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: "=&r" (result)
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: "b" (atomic), "r" (oldval), "r" (newval)
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: "cr0", "memory");
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#endif
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return result == 0;
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}
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# else /* What's that */
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