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/**********************************************************************
vm.h -
$Author$
created at: 04/01/01 16:56:59 JST
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#ifndef RUBY_VM_EXEC_H
#define RUBY_VM_EXEC_H
typedef long OFFSET;
typedef unsigned long lindex_t;
typedef VALUE GENTRY;
typedef rb_iseq_t *ISEQ;
#ifdef __GCC__
/* TODO: machine dependent prefetch instruction */
#define PREFETCH(pc)
#else
#define PREFETCH(pc)
#endif
#if VMDEBUG > 0
#define debugs printf
#define DEBUG_ENTER_INSN(insn) \
rb_vmdebug_debug_print_pre(th, GET_CFP());
#if OPT_STACK_CACHING
#define SC_REGS() , reg_a, reg_b
#else
#define SC_REGS()
#endif
#define DEBUG_END_INSN() \
rb_vmdebug_debug_print_post(th, GET_CFP() SC_REGS());
#else
#define debugs
#define DEBUG_ENTER_INSN(insn)
#define DEBUG_END_INSN()
#endif
#define throwdebug if(0)printf
/* #define throwdebug printf */
/************************************************/
#if defined(DISPATCH_XXX)
error !
/************************************************/
#elif OPT_CALL_THREADED_CODE
#define LABEL(x) insn_func_##x
#define ELABEL(x)
#define LABEL_PTR(x) &LABEL(x)
#define INSN_ENTRY(insn) \
static rb_control_frame_t * \
FUNC_FASTCALL(LABEL(insn))(rb_thread_t *th, rb_control_frame_t *reg_cfp) {
#define END_INSN(insn) return reg_cfp;}
#define NEXT_INSN() return reg_cfp;
/************************************************/
#elif OPT_TOKEN_THREADED_CODE || OPT_DIRECT_THREADED_CODE
/* threaded code with gcc */
#define LABEL(x) INSN_LABEL_##x
#define ELABEL(x) INSN_ELABEL_##x
#define LABEL_PTR(x) &&LABEL(x)
#define INSN_ENTRY_SIG(insn)
#define INSN_DISPATCH_SIG(insn)
#define INSN_ENTRY(insn) \
LABEL(insn): \
INSN_ENTRY_SIG(insn); \
/* dispatcher */
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && __GNUC__ == 3
#define DISPATCH_ARCH_DEPEND_WAY(addr) \
__asm__ __volatile__("jmp *%0;\t# -- inserted by vm.h\t[length = 2]" : : "r" (addr))
#else
#define DISPATCH_ARCH_DEPEND_WAY(addr) \
/* do nothing */
#endif
/**********************************/
#if OPT_DIRECT_THREADED_CODE
/* for GCC 3.4.x */
#define TC_DISPATCH(insn) \
INSN_DISPATCH_SIG(insn); \
goto *(void const *)GET_CURRENT_INSN(); \
;
#else
/* token threaded code */
#define TC_DISPATCH(insn) \
DISPATCH_ARCH_DEPEND_WAY(insns_address_table[GET_CURRENT_INSN()]); \
INSN_DISPATCH_SIG(insn); \
goto *insns_address_table[GET_CURRENT_INSN()]; \
rb_bug("tc error");
#endif /* DISPATCH_DIRECT_THREADED_CODE */
#define END_INSN(insn) \
DEBUG_END_INSN(); \
TC_DISPATCH(insn);
#define INSN_DISPATCH() \
TC_DISPATCH(__START__) \
{
#define END_INSNS_DISPATCH() \
rb_bug("unknown insn: %"PRIdVALUE, GET_CURRENT_INSN()); \
} /* end of while loop */ \
#define NEXT_INSN() TC_DISPATCH(__NEXT_INSN__)
/************************************************/
#else /* no threaded code */
/* most common method */
#define INSN_ENTRY(insn) \
case BIN(insn):
#define END_INSN(insn) \
DEBUG_END_INSN(); \
break;
#define INSN_DISPATCH() \
while (1) { \
switch (GET_CURRENT_INSN()) {
#define END_INSNS_DISPATCH() \
default: \
SDR(); \
rb_bug("unknown insn: %ld", GET_CURRENT_INSN()); \
} /* end of switch */ \
} /* end of while loop */ \
#define NEXT_INSN() goto first
#endif
#define VM_SP_CNT(th, sp) ((sp) - (th)->stack)
#if OPT_CALL_THREADED_CODE
#define THROW_EXCEPTION(exc) do { \
th->errinfo = (VALUE)(exc); \
return 0; \
} while (0)
#else
#define THROW_EXCEPTION(exc) return (VALUE)(exc)
#endif
#define SCREG(r) (reg_##r)
#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) do { \
if (((rb_control_frame_t *)(((cfp)->sp) + (margin)) + 1) >= (cfp)) { \
rb_bug("CHECK_VM_STACK_OVERFLOW_FOR_INSN: should not overflow here. " \
"Please contact ruby-core/dev with your (a part of) script. " \
"This check will be removed soon."); \
} \
} while (0)
#endif /* RUBY_VM_EXEC_H */
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