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/**********************************************************************
insnhelper.h - helper macros to implement each instructions
$Author$
$Date$
created at: 04/01/01 15:50:34 JST
Copyright (C) 2004-2006 Koichi Sasada
**********************************************************************/
#ifndef _INSNHELPER_H_INCLUDED_
#define _INSNHELPER_H_INCLUDED_
#include "vm.h"
/*
* deal with control frame pointer
*/
/**********************************************************/
/* deal with stack */
/**********************************************************/
#define PUSH(x) (SET_SV(x), INC_SP(1))
#define TOPN(n) (*(GET_SP()-(n)-1))
#define POPN(n) (INC_SP(-(n)))
#define POP() (INC_SP(-1))
#define STACK_ADDR_FROM_TOP(n) (&GET_SP()[-(n)])
#define GET_TOS() (tos) /* dummy */
/**********************************************************/
/* deal with registers */
/**********************************************************/
#define REG_CFP (reg_cfp)
#define REG_PC (REG_CFP->pc)
#define REG_SP (REG_CFP->sp)
#define REG_LFP (REG_CFP->lfp)
#define REG_DFP (REG_CFP->dfp)
#define RESTORE_REGS() \
{ \
REG_CFP = th->cfp; \
}
#define REG_A reg_a
#define REG_B reg_b
#ifdef COLLECT_USAGE_ANALYSIS
#define USAGE_ANALYSIS_REGISTER_HELPER(a, b, v) \
(USAGE_ANALYSIS_REGISTER(a, b), (v))
#else
#define USAGE_ANALYSIS_REGISTER_HELPER(a, b, v) \
(v)
#endif
/* PC */
#define GET_PC() (USAGE_ANALYSIS_REGISTER_HELPER(0, 0, REG_PC))
#define SET_PC(x) (REG_PC = (USAGE_ANALYSIS_REGISTER_HELPER(0, 1, x)))
#define GET_CURRENT_INSN() (*GET_PC())
#define GET_OPERAND(n) (GET_PC()[(n)])
#define ADD_PC(n) (SET_PC(REG_PC + (n)))
#define GET_PC_COUNT() (REG_PC - GET_ISEQ()->iseq_encoded)
#define JUMP(dst) (REG_PC += (dst))
/* FP */
#define GET_CFP() (USAGE_ANALYSIS_REGISTER_HELPER(2, 0, REG_CFP))
#define GET_LFP() (USAGE_ANALYSIS_REGISTER_HELPER(3, 0, REG_LFP))
#define SET_LFP(x) (REG_LFP = (USAGE_ANALYSIS_REGISTER_HELPER(3, 1, (x))))
#define GET_DFP() (USAGE_ANALYSIS_REGISTER_HELPER(4, 0, REG_DFP))
#define SET_DFP(x) (REG_DFP = (USAGE_ANALYSIS_REGISTER_HELPER(4, 1, (x))))
#define GET_CONTINUATION_FRAME_PTR(cfp) \
((struct continuation_frame *)((cfp) + CC_DIFF_WC()))
/* SP */
#define GET_SP() (USAGE_ANALYSIS_REGISTER_HELPER(1, 0, REG_SP))
#define SET_SP(x) (REG_SP = (USAGE_ANALYSIS_REGISTER_HELPER(1, 1, (x))))
#define INC_SP(x) (REG_SP += ((VALUE)(USAGE_ANALYSIS_REGISTER_HELPER(1, 1, (VALUE)(x)))))
#define SET_SV(x) (*GET_SP() = (x))
/* set current stack value as x */
#define GET_SP_COUNT() (REG_SP - th->stack)
/* instruction sequence C struct */
#define GET_ISEQ() (GET_CFP()->iseq)
#define CLEAR_ENV(env) (GET_ENV_CTRL(env)->is_orphan = Qundef)
/**********************************************************/
/* deal with variables */
/**********************************************************/
#define GET_CURRENT_DYNAMIC(idx) (GET_DFP()[-idx])
#define GET_PREV_DFP(dfp) ((VALUE *)((dfp)[0] & ~0x03))
#define GET_GLOBAL(entry) rb_gvar_get((struct global_entry*)entry)
#define SET_GLOBAL(entry, val) rb_gvar_set((struct global_entry*)entry, val)
/**********************************************************/
/* deal with values */
/**********************************************************/
#define GET_SELF() (USAGE_ANALYSIS_REGISTER_HELPER(5, 0, GET_CFP()->self))
/**********************************************************/
/* deal with control flow 2: method/iterator */
/**********************************************************/
#define COPY_CREF(c1, c2) { \
NODE *__tmp_c2 = (c2); \
c1->nd_clss = __tmp_c2->nd_clss; \
c1->nd_visi = __tmp_c2->nd_visi; \
c1->nd_next = __tmp_c2->nd_next; \
}
/* block */
#define GET_BLOCK_PTR() \
((yarv_block_t *)(GC_GUARDED_PTR_REF(GET_LFP()[0])))
#define CHECK_STACK_OVERFLOW(th, cfp, margin) \
(((VALUE *)(cfp)->sp) + (margin) >= ((VALUE *)cfp))
/**********************************************************/
/* deal with control flow 3: exception */
/**********************************************************/
/**********************************************************/
/* others */
/**********************************************************/
/* optimize insn */
#define FIXNUM_2_P(a, b) ((a) & (b) & 1)
#define BASIC_OP_UNREDEFINED_P(op) ((yarv_redefined_flag & (op)) == 0)
#define HEAP_CLASS_OF(obj) RBASIC(obj)->klass
#endif /* _INSNHELPER_H_INCLUDED_ */
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