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qemu
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workaround for gcc 3.3 bug or overoptimisation if a label is not used 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@368 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-08-11 22:21:18 +00:00
parent 70a194b930
commit 9257a9e49c
1 changed files with 8 additions and 5 deletions
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13
exec.h
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@ -225,11 +225,14 @@ TranslationBlock *tb_find_pc(unsigned long pc_ptr);
#if defined(__powerpc__) #if defined(__powerpc__)
/* on PowerPC we patch the jump instruction directly */ /* on PowerPC we patch the jump instruction directly */
#define JUMP_TB(tbparam, n, eip)\ #define JUMP_TB(opname, tbparam, n, eip)\
do {\ do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\ asm volatile (".section \".data\"\n"\
asm volatile ("b %0" : : "i" (&__op_jmp ## n));\ "__op_label" #n "." stringify(opname) ":\n"\
label ## n:\ ".long 1f\n"\
".previous\n"\
"b __op_jmp" #n "\n"\
"1:\n");\
T0 = (long)(tbparam) + (n);\ T0 = (long)(tbparam) + (n);\
EIP = eip;\ EIP = eip;\
EXIT_TB();\ EXIT_TB();\
@ -239,7 +242,7 @@ label ## n:\
/* jump to next block operations (more portable code, does not need /* jump to next block operations (more portable code, does not need
cache flushing, but slower because of indirect jump) */ cache flushing, but slower because of indirect jump) */
#define JUMP_TB(tbparam, n, eip)\ #define JUMP_TB(opname, tbparam, n, eip)\
do {\ do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\ static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\ static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\