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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 __GNUC__
/* 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(ec, GET_CFP(), GET_PC());
#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(ec, 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_execution_context_t *ec, rb_control_frame_t *reg_cfp) {
#define END_INSN(insn) return reg_cfp;}
#define NEXT_INSN() return reg_cfp;
#define START_OF_ORIGINAL_INSN(x) /* ignore */
#define DISPATCH_ORIGINAL_INSN(x) return LABEL(x)(ec, 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) RB_GNUC_EXTENSION(&&LABEL(x))
#define INSN_ENTRY_SIG(insn) \
if (0) fprintf(stderr, "exec: %s@(%d, %d)@%s:%d\n", #insn, \
(int)(reg_pc - reg_cfp->iseq->body->iseq_encoded), \
(int)(reg_cfp->pc - reg_cfp->iseq->body->iseq_encoded), \
RSTRING_PTR(rb_iseq_path(reg_cfp->iseq)), \
(int)(rb_iseq_line_no(reg_cfp->iseq, reg_pc - reg_cfp->iseq->body->iseq_encoded)));
#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); \
RB_GNUC_EXTENSION_BLOCK(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); \
RB_GNUC_EXTENSION_BLOCK(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__)
#define START_OF_ORIGINAL_INSN(x) start_of_##x:
#define DISPATCH_ORIGINAL_INSN(x) goto start_of_##x;
/************************************************/
#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
#define START_OF_ORIGINAL_INSN(x) start_of_##x:
#define DISPATCH_ORIGINAL_INSN(x) goto start_of_##x;
#endif
#define VM_SP_CNT(ec, sp) ((sp) - (ec)->vm_stack)
#ifdef MJIT_HEADER
#define THROW_EXCEPTION(exc) do { \
ec->errinfo = (VALUE)(exc); \
EC_JUMP_TAG(ec, ec->tag->state); \
} while (0)
#else
#if OPT_CALL_THREADED_CODE
#define THROW_EXCEPTION(exc) do { \
ec->errinfo = (VALUE)(exc); \
return 0; \
} while (0)
#else
#define THROW_EXCEPTION(exc) return (VALUE)(exc)
#endif
#endif
#define SCREG(r) (reg_##r)
#define VM_DEBUG_STACKOVERFLOW 0
#if VM_DEBUG_STACKOVERFLOW
#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) \
WHEN_VM_STACK_OVERFLOWED(cfp, (cfp)->sp, margin) vm_stack_overflow_for_insn()
#else
#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin)
#endif
#define INSN_LABEL2(insn, name) INSN_LABEL_ ## insn ## _ ## name
#define INSN_LABEL(x) INSN_LABEL2(NAME_OF_CURRENT_INSN, x)
#endif /* RUBY_VM_EXEC_H */
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