/* src/vm/jit/mips/emit.c - MIPS code emitter functions

   Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
   C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   J. Wenninger, Institut f. Computersprachen - TU Wien

   This file is part of CACAO.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

   Contact: cacao@cacaojvm.org

   Authors: Christian Thalinger

   Changes:

   $Id: emitfuncs.c 4398 2006-01-31 23:43:08Z twisti $

*/


#include "config.h"

#include "vm/types.h"

#include "md-abi.h"

#include "vm/jit/mips/codegen.h"

#if defined(ENABLE_THREADS)
# include "threads/native/lock.h"
#endif

#include "vm/exceptions.h"
#include "vm/options.h"
#include "vm/stringlocal.h" /* XXX for gen_resolvebranch */
#include "vm/jit/abi-asm.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/dseg.h"
#include "vm/jit/emit-common.h"
#include "vm/jit/jit.h"
#include "vm/jit/replace.h"


/* emit_load *******************************************************************

   Emits a possible load of an operand.

*******************************************************************************/

s4 emit_load(jitdata *jd, instruction *iptr, varinfo *src, s4 tempreg)
{
	codegendata  *cd;
	s4            disp;
	s4            reg;

	/* get required compiler data */

	cd = jd->cd;

	if (src->flags & INMEMORY) {
		COUNT_SPILLS;

		disp = src->vv.regoff * 8;

		if (IS_FLT_DBL_TYPE(src->type)) {
			if (IS_2_WORD_TYPE(src->type))
				M_DLD(tempreg, REG_SP, disp);
			else
				M_FLD(tempreg, REG_SP, disp);
		}
		else
			M_LLD(tempreg, REG_SP, disp);

		reg = tempreg;
	}
	else
		reg = src->vv.regoff;

	return reg;
}


/* emit_store ******************************************************************

   Emits a possible store to variable.

*******************************************************************************/

void emit_store(jitdata *jd, instruction *iptr, varinfo *dst, s4 d)
{
	codegendata  *cd;
	s4            disp;

	/* get required compiler data */

	cd = jd->cd;

	if (dst->flags & INMEMORY) {
		COUNT_SPILLS;

		disp = dst->vv.regoff * 8;

		if (IS_FLT_DBL_TYPE(dst->type)) {
			if (IS_2_WORD_TYPE(dst->type))
				M_DST(d, REG_SP, disp);
			else
				M_FST(d, REG_SP, disp);
		}
		else
			M_LST(d, REG_SP, disp);
	}
}


/* emit_copy *******************************************************************

   Generates a register/memory to register/memory copy.

*******************************************************************************/

void emit_copy(jitdata *jd, instruction *iptr, varinfo *src, varinfo *dst)
{
	codegendata  *cd;
	s4            s1, d;

	/* get required compiler data */

	cd = jd->cd;

	if ((src->vv.regoff != dst->vv.regoff) ||
		((src->flags ^ dst->flags) & INMEMORY)) {

		/* If one of the variables resides in memory, we can eliminate
		   the register move from/to the temporary register with the
		   order of getting the destination register and the load. */

		if (IS_INMEMORY(src->flags)) {
			d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
			s1 = emit_load(jd, iptr, src, d);
		}
		else {
			s1 = emit_load(jd, iptr, src, REG_IFTMP);
			d = codegen_reg_of_var(iptr->opc, dst, s1);
		}

		if (s1 != d) {
			if (IS_FLT_DBL_TYPE(src->type)) {
				if (IS_2_WORD_TYPE(src->type))
					M_DMOV(s1, d);
				else
					M_FMOV(s1, d);
			}
			else
				M_MOV(s1, d);
		}

		emit_store(jd, iptr, dst, d);
	}
}


/* emit_iconst *****************************************************************

   XXX

*******************************************************************************/

void emit_iconst(codegendata *cd, s4 d, s4 value)
{
	s4 disp;

    if ((value >= -32768) && (value <= 32767))
        M_IADD_IMM(REG_ZERO, value, d);
	else if ((value >= 0) && (value <= 0xffff))
        M_OR_IMM(REG_ZERO, value, d);
	else {
        disp = dseg_add_s4(cd, value);
        M_ILD(d, REG_PV, disp);
    }
}


/* emit_lconst *****************************************************************

   XXX

*******************************************************************************/

void emit_lconst(codegendata *cd, s4 d, s8 value)
{
	s4 disp;

	if ((value >= -32768) && (value <= 32767))
		M_LADD_IMM(REG_ZERO, value, d);
	else if ((value >= 0) && (value <= 0xffff))
		M_OR_IMM(REG_ZERO, value, d);
	else {
		disp = dseg_add_s8(cd, value);
		M_LLD(d, REG_PV, disp);
	}
}


/* emit_arithmetic_check *******************************************************

   Emit an ArithmeticException check.

*******************************************************************************/

void emit_arithmetic_check(codegendata *cd, s4 reg)
{
#if 0
	M_BEQZ(reg, 0);
	codegen_add_arithmeticexception_ref(cd);
	M_NOP;
#else
	M_BNEZ(reg, 6);
	M_NOP;

	M_LUI(REG_ITMP3, 0);
	M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
	codegen_add_arithmeticexception_ref(cd);
	M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
	M_JMP(REG_ITMP3);
	M_NOP;
#endif
}


/* emit_arrayindexoutofbounds_check ********************************************

   Emit an ArrayIndexOutOfBoundsException check.

*******************************************************************************/

void emit_arrayindexoutofbounds_check(codegendata *cd, s4 s1, s4 s2)
{
	if (checkbounds) {
		M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
		M_CMPULT(s2, REG_ITMP3, REG_ITMP3);

#if 0
		M_BEQZ(REG_ITMP3, 0);
		codegen_add_arrayindexoutofboundsexception_ref(cd, s2);
		M_NOP;
#else
		M_BNEZ(REG_ITMP3, 6);
		M_NOP;

		M_LUI(REG_ITMP3, 0);
		M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
		codegen_add_arrayindexoutofboundsexception_ref(cd, s2);
		M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
		M_JMP(REG_ITMP3);
		M_NOP;
#endif
	}
}


/* emit_arraystore_check *******************************************************

   Emit an ArrayStoreException check.

*******************************************************************************/

void emit_arraystore_check(codegendata *cd, s4 reg)
{
#if 0
	M_BEQZ(reg, 0);
	codegen_add_arraystoreexception_ref(cd);
	M_NOP;
#else
	M_BNEZ(reg, 6);
	M_NOP;

	M_LUI(REG_ITMP3, 0);
	M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
	codegen_add_arraystoreexception_ref(cd);
	M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
	M_JMP(REG_ITMP3);
	M_NOP;
#endif
}


/* emit_classcast_check ********************************************************

   Emit a ClassCastException check.

*******************************************************************************/

void emit_classcast_check(codegendata *cd, s4 condition, s4 reg, s4 s1)
{
#if 0
	M_BNEZ(reg, 0);
	codegen_add_classcastexception_ref(cd, s1);
	M_NOP;
#else
	switch (condition) {
	case ICMD_IFEQ:
		M_BNEZ(reg, 6);
		break;

	case ICMD_IFNE:
		M_BEQZ(reg, 6);
		break;

	case ICMD_IFLE:
		M_BGTZ(reg, 6);
		break;

	default:
		vm_abort("emit_classcast_check: condition %d not found", condition);
	}

	M_NOP;

	M_LUI(REG_ITMP3, 0);
	M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
	codegen_add_classcastexception_ref(cd, s1);
	M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
	M_JMP(REG_ITMP3);
	M_NOP;
#endif
}


/* emit_nullpointer_check ******************************************************

   Emit a NullPointerException check.

*******************************************************************************/

void emit_nullpointer_check(codegendata *cd, s4 reg)
{
	if (checknull) {
#if 0
		M_BEQZ(reg, 0);
		codegen_add_nullpointerexception_ref(cd);
		M_NOP;
#else
		M_BNEZ(reg, 6);
		M_NOP;

		M_LUI(REG_ITMP3, 0);
		M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
		codegen_add_nullpointerexception_ref(cd);
		M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
		M_JMP(REG_ITMP3);
		M_NOP;
#endif
	}
}


/* emit_exception_check ********************************************************

   Emit an Exception check.

*******************************************************************************/

void emit_exception_check(codegendata *cd)
{
#if 0
	M_BEQZ(REG_RESULT, 0);
	codegen_add_fillinstacktrace_ref(cd);
	M_NOP;
#else
	M_BNEZ(REG_RESULT, 6);
	M_NOP;

	M_LUI(REG_ITMP3, 0);
	M_OR_IMM(REG_ITMP3, 0, REG_ITMP3);
	codegen_add_fillinstacktrace_ref(cd);
	M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
	M_JMP(REG_ITMP3);
	M_NOP;
#endif
}


/* emit_exception_stubs ********************************************************

   Generates the code for the exception stubs.

*******************************************************************************/

void emit_exception_stubs(jitdata *jd)
{
	codegendata  *cd;
	registerdata *rd;
	exceptionref *er;
	s4            branchmpc;
	s4            targetmpc;
	s4            targetdisp;
	s4            disp;

	/* get required compiler data */

	cd = jd->cd;
	rd = jd->rd;

	/* generate exception stubs */

	targetdisp = 0;

	for (er = cd->exceptionrefs; er != NULL; er = er->next) {
		/* back-patch the branch to this exception code */

		branchmpc = er->branchpos;
		targetmpc = cd->mcodeptr - cd->mcodebase;

		md_codegen_patch_branch(cd, branchmpc, targetmpc);

		MCODECHECK(100);

		/* Check if the exception is an
		   ArrayIndexOutOfBoundsException.  If so, move index register
		   into REG_ITMP1. */

		if (er->reg != -1)
			M_MOV(er->reg, REG_ITMP1);

		/* calcuate exception address */

		M_LDA(REG_ITMP2_XPC, REG_PV, er->branchpos - 4);

		/* move function to call into REG_ITMP3 */

		disp = dseg_add_functionptr(cd, er->function);
		M_ALD(REG_ITMP3, REG_PV, disp);

		if (targetdisp == 0) {
			targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);

			M_MOV(REG_PV, REG_A0);
			M_MOV(REG_SP, REG_A1);

			if (jd->isleafmethod)
				M_MOV(REG_RA, REG_A2);
			else
				M_ALD(REG_A2, REG_SP, (cd->stackframesize - 1) * 8);

			M_MOV(REG_ITMP2_XPC, REG_A3);
			M_MOV(REG_ITMP1, REG_A4);

			M_ASUB_IMM(REG_SP, 2 * 8, REG_SP);
			M_AST(REG_ITMP2_XPC, REG_SP, 0 * 8);

			if (jd->isleafmethod)
				M_AST(REG_RA, REG_SP, 1 * 8);

			M_JSR(REG_RA, REG_ITMP3);
			M_NOP;
			M_MOV(REG_RESULT, REG_ITMP1_XPTR);

			if (jd->isleafmethod)
				M_ALD(REG_RA, REG_SP, 1 * 8);

			M_ALD(REG_ITMP2_XPC, REG_SP, 0 * 8);
			M_AADD_IMM(REG_SP, 2 * 8, REG_SP);

			disp = dseg_add_functionptr(cd, asm_handle_exception);
			M_ALD(REG_ITMP3, REG_PV, disp);
			M_JMP(REG_ITMP3);
			M_NOP;
		}
		else {
			disp = (((u4 *) cd->mcodebase) + targetdisp) -
				(((u4 *) cd->mcodeptr) + 1);

			M_BR(disp);
			M_NOP;
		}
	}
}


/* emit_patcher_stubs **********************************************************

   Generates the code for the patcher stubs.

*******************************************************************************/

void emit_patcher_stubs(jitdata *jd)
{
	codegendata *cd;
	patchref    *pr;
	u4           mcode[5];
	u1          *savedmcodeptr;
	u1          *tmpmcodeptr;
	s4           targetdisp;
	s4           disp;
	s4           hi;
	s4           lo;

	/* get required compiler data */

	cd = jd->cd;

	/* generate code patching stub call code */

	targetdisp = 0;

/* 	for (pr = list_first_unsynced(cd->patchrefs); pr != NULL; */
/* 		 pr = list_next_unsynced(cd->patchrefs, pr)) { */
	for (pr = cd->patchrefs; pr != NULL; pr = pr->next) {
		/* check code segment size */

		MCODECHECK(100);

		/* Get machine code which is patched back in later. The
		   call is 2 instruction words long. */

		tmpmcodeptr = (u1 *) (cd->mcodebase + pr->branchpos);

		/* We use 2 loads here as an unaligned 8-byte read on 64-bit
		   MIPS causes a SIGSEGV and using the same code for both
		   architectures is much better. */

		mcode[0] = ((u4 *) tmpmcodeptr)[0];
		mcode[1] = ((u4 *) tmpmcodeptr)[1];

		mcode[2] = ((u4 *) tmpmcodeptr)[2];
		mcode[3] = ((u4 *) tmpmcodeptr)[3];
		mcode[4] = ((u4 *) tmpmcodeptr)[4];

		/* Patch in the call to call the following code (done at
		   compile time). */

		savedmcodeptr = cd->mcodeptr;   /* save current mcodeptr              */
		cd->mcodeptr  = tmpmcodeptr;    /* set mcodeptr to patch position     */

		disp = ((u4 *) savedmcodeptr) - (((u4 *) tmpmcodeptr) + 1);

		if ((disp < (s4) 0xffff8000) || (disp > (s4) 0x00007fff)) {
			/* Recalculate the displacement to be relative to PV. */

			disp = savedmcodeptr - cd->mcodebase;

			lo = (short) disp;
			hi = (short) ((disp - lo) >> 16);

			M_LUI(REG_ITMP3, hi);
			M_OR_IMM(REG_ITMP3, lo, REG_ITMP3);
			M_AADD(REG_PV, REG_ITMP3, REG_ITMP3);
			M_JMP(REG_ITMP3);
			M_NOP;
		}
		else {
			M_BR(disp);
			M_NOP;
			M_NOP;
			M_NOP;
			M_NOP;
		}

		cd->mcodeptr = savedmcodeptr;   /* restore the current mcodeptr   */

		/* create stack frame */

		M_ASUB_IMM(REG_SP, 8 * 8, REG_SP);

		/* calculate return address and move it onto the stack */

		M_LDA(REG_ITMP3, REG_PV, pr->branchpos);
		M_AST(REG_ITMP3, REG_SP, 7 * 8);

		/* move pointer to java_objectheader onto stack */

#if defined(ENABLE_THREADS)
		/* create a virtual java_objectheader */

		(void) dseg_add_unique_address(cd, NULL);                  /* flcword */
		(void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
		disp = dseg_add_unique_address(cd, NULL);                  /* vftbl   */

		M_LDA(REG_ITMP3, REG_PV, disp);
		M_AST(REG_ITMP3, REG_SP, 6 * 8);
#else
		/* do nothing */
#endif

		/* move machine code onto stack */

		disp = dseg_add_s4(cd, mcode[0]);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 3 * 8 + 0);

		disp = dseg_add_s4(cd, mcode[1]);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 3 * 8 + 4);

		disp = dseg_add_s4(cd, mcode[2]);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 4 * 8 + 0);

		disp = dseg_add_s4(cd, mcode[3]);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 4 * 8 + 4);

		disp = dseg_add_s4(cd, mcode[4]);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 5 * 8 + 0);

		/* move class/method/field reference onto stack */

		disp = dseg_add_address(cd, pr->ref);
		M_ALD(REG_ITMP3, REG_PV, disp);
		M_AST(REG_ITMP3, REG_SP, 2 * 8);

		/* move data segment displacement onto stack */

		disp = dseg_add_s4(cd, pr->disp);
		M_ILD(REG_ITMP3, REG_PV, disp);
		M_IST(REG_ITMP3, REG_SP, 1 * 8);

		/* move patcher function pointer onto stack */

		disp = dseg_add_address(cd, pr->patcher);
		M_ALD(REG_ITMP3, REG_PV, disp);
		M_AST(REG_ITMP3, REG_SP, 0 * 8);

		if (targetdisp == 0) {
			targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);

			disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
			M_ALD(REG_ITMP3, REG_PV, disp);
			M_JMP(REG_ITMP3);
			M_NOP;
		}
		else {
			disp = (((u4 *) cd->mcodebase) + targetdisp) -
				(((u4 *) cd->mcodeptr) + 1);

			M_BR(disp);
			M_NOP;
		}
	}
}


/* emit_replacement_stubs ******************************************************

   Generates the code for the replacement stubs.

*******************************************************************************/

void emit_replacement_stubs(jitdata *jd)
{
	codegendata *cd;
	codeinfo    *code;
	rplpoint    *rplp;
	u1          *savedmcodeptr;
	s4           disp;
	s4           i;
	u1          *outcode;

	/* get required compiler data */

	cd   = jd->cd;
	code = jd->code;

	rplp = code->rplpoints;

	for (i = 0; i < code->rplpointcount; ++i, ++rplp) {
		/* check code segment size */

		MCODECHECK(100);

		/* note start of stub code */

		outcode = (u1 *) (ptrint) (cd->mcodeptr - cd->mcodebase);

		/* make machine code for patching */

		savedmcodeptr = cd->mcodeptr;
		cd->mcodeptr  = (u1 *) &(rplp->mcode);

		disp = (ptrint) ((s4 *) outcode - (s4 *) rplp->pc) - 1;

		if ((disp < (s4) 0xffff8000) || (disp > (s4) 0x00007fff)) {
			*exceptionptr =
				new_internalerror("Jump offset is out of range: %d > +/-%d",
								  disp, 0x00007fff);
			return;
		}

		M_BR(disp);
		M_NOP; /* delay slot */

		cd->mcodeptr = savedmcodeptr;

		/* create stack frame - 16-byte aligned */

		M_ASUB_IMM(REG_SP, 2 * 8, REG_SP);

		/* push address of `rplpoint` struct */

		disp = dseg_add_address(cd, rplp);
		M_ALD(REG_ITMP3, REG_PV, disp);
		M_AST(REG_ITMP3, REG_SP, 0 * 8);

		/* jump to replacement function */

		disp = dseg_add_functionptr(cd, asm_replacement_out);
		M_ALD(REG_ITMP3, REG_PV, disp);
		M_JMP(REG_ITMP3);
		M_NOP; /* delay slot */
	}
}


/* emit_verbosecall_enter ******************************************************

   Generates the code for the call trace.

*******************************************************************************/

#if !defined(NDEBUG)
void emit_verbosecall_enter(jitdata *jd)
{
	methodinfo   *m;
	codegendata  *cd;
	registerdata *rd;
	methoddesc   *md;
	s4            disp;
	s4            i, t;

	/* get required compiler data */

	m  = jd->m;
	cd = jd->cd;
	rd = jd->rd;

	md = m->parseddesc;

	/* mark trace code */

	M_NOP;

	M_LDA(REG_SP, REG_SP, -(2 + ARG_CNT + TMP_CNT) * 8);
	M_AST(REG_RA, REG_SP, 1 * 8);

	/* save argument registers */

	for (i = 0; i < INT_ARG_CNT; i++)
		M_LST(rd->argintregs[i], REG_SP, (2 + i) * 8);

	for (i = 0; i < FLT_ARG_CNT; i++)
		M_DST(rd->argfltregs[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);

	/* save temporary registers for leaf methods */

	if (jd->isleafmethod) {
		for (i = 0; i < INT_TMP_CNT; i++)
			M_LST(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);

		for (i = 0; i < FLT_TMP_CNT; i++)
			M_DST(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
	}

	/* load float arguments into integer registers */

	for (i = 0; i < md->paramcount && i < INT_ARG_CNT; i++) {
		t = md->paramtypes[i].type;

		if (IS_FLT_DBL_TYPE(t)) {
			if (IS_2_WORD_TYPE(t)) {
				M_DST(rd->argfltregs[i], REG_SP, 0 * 8);
				M_LLD(rd->argintregs[i], REG_SP, 0 * 8);
			}
			else {
				M_FST(rd->argfltregs[i], REG_SP, 0 * 8);
				M_ILD(rd->argintregs[i], REG_SP, 0 * 8);
			}
		}
	}

	disp = dseg_add_address(cd, m);
	M_ALD(REG_ITMP1, REG_PV, disp);
	M_AST(REG_ITMP1, REG_SP, 0 * 8);
	disp = dseg_add_functionptr(cd, builtin_trace_args);
	M_ALD(REG_ITMP3, REG_PV, disp);
	M_JSR(REG_RA, REG_ITMP3);
	M_NOP;

	/* restore argument registers */

	for (i = 0; i < INT_ARG_CNT; i++)
		M_LLD(rd->argintregs[i], REG_SP, (2 + i) * 8);

	for (i = 0; i < FLT_ARG_CNT; i++)
		M_DLD(rd->argfltregs[i], REG_SP, (2 + INT_ARG_CNT + i) * 8);

	/* restore temporary registers for leaf methods */

	if (jd->isleafmethod) {
		for (i = 0; i < INT_TMP_CNT; i++)
			M_LLD(rd->tmpintregs[i], REG_SP, (2 + ARG_CNT + i) * 8);

		for (i = 0; i < FLT_TMP_CNT; i++)
			M_DLD(rd->tmpfltregs[i], REG_SP, (2 + ARG_CNT + INT_TMP_CNT + i) * 8);
	}

	M_ALD(REG_RA, REG_SP, 1 * 8);
	M_LDA(REG_SP, REG_SP, (2 + ARG_CNT + TMP_CNT) * 8);

	/* mark trace code */

	M_NOP;
}
#endif /* !defined(NDEBUG) */


/* emit_verbosecall_exit *******************************************************

   Generates the code for the call trace.

*******************************************************************************/

#if !defined(NDEBUG)
void emit_verbosecall_exit(jitdata *jd)
{
	methodinfo   *m;
	codegendata  *cd;
	registerdata *rd;
	s4            disp;

	/* get required compiler data */

	m  = jd->m;
	cd = jd->cd;
	rd = jd->rd;

	/* mark trace code */

	M_NOP;

	M_LDA(REG_SP, REG_SP, -4 * 8);              /* keep stack 16-byte aligned */
	M_LST(REG_RA, REG_SP, 0 * 8);

	M_LST(REG_RESULT, REG_SP, 1 * 8);
	M_DST(REG_FRESULT, REG_SP, 2 * 8);

	disp = dseg_add_address(cd, m);
	M_ALD(rd->argintregs[0], REG_PV, disp);

	M_MOV(REG_RESULT, rd->argintregs[1]);
	M_DMOV(REG_FRESULT, rd->argfltregs[2]);
	M_FMOV(REG_FRESULT, rd->argfltregs[3]);

	disp = dseg_add_functionptr(cd, builtin_displaymethodstop);
	M_ALD(REG_ITMP3, REG_PV, disp);
	M_JSR(REG_RA, REG_ITMP3);
	M_NOP;

	M_DLD(REG_FRESULT, REG_SP, 2 * 8);
	M_LLD(REG_RESULT, REG_SP, 1 * 8);

	M_LLD(REG_RA, REG_SP, 0 * 8);
	M_LDA(REG_SP, REG_SP, 4 * 8);

	/* mark trace code */

	M_NOP;
}
#endif /* !defined(NDEBUG) */


/*
 * These are local overrides for various environment variables in Emacs.
 * Please do not remove this and leave it at the end of the file, where
 * Emacs will automagically detect them.
 * ---------------------------------------------------------------------
 * Local variables:
 * mode: c
 * indent-tabs-mode: t
 * c-basic-offset: 4
 * tab-width: 4
 * End:
 * vim:noexpandtab:sw=4:ts=4:
 */