simple64/parallel-rsp/lightning/lib/jit_mips.c

/*
 * Copyright (C) 2012-2023  Free Software Foundation, Inc.
 *
 * This file is part of GNU lightning.
 *
 * GNU lightning is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * GNU lightning 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 Lesser General Public
 * License for more details.
 *
 * Authors:
 *	Paulo Cesar Pereira de Andrade
 */

#if defined(__linux__)
#  include <sys/cachectl.h>
#endif

#if NEW_ABI
/*   callee save				    + variadic arguments
 *   align16(ra+fp+s[0-7]++f20+f22+f24+f26+f28+f30) + align16(a[0-7]) */
#  define stack_framesize		(128 + 64)
#else
/*   callee save
 *   align16(ra+fp+s[0-7]+f16+f18+f20+f22+f24+f26+f28+f30) */
#  define stack_framesize		128
#endif

#if NEW_ABI
#  define NUM_WORD_ARGS			8
#  define STACK_SLOT			8
#  define STACK_SHIFT			3
#else
#  define NUM_WORD_ARGS			4
#  define STACK_SLOT			4
#  define STACK_SHIFT			2
#endif
#if NEW_ABI && __BYTE_ORDER == __BIG_ENDIAN && __WORDSIZE == 32
#  define WORD_ADJUST			4
#else
#  define WORD_ADJUST			0
#endif
#define jit_arg_reg_p(i)		((i) >= 0 && (i) < NUM_WORD_ARGS)
#if __BYTE_ORDER == __LITTLE_ENDIAN
#  define C_DISP			0
#  define S_DISP			0
#  define I_DISP			0
#else
#  define C_DISP			STACK_SLOT - sizeof(jit_int8_t)
#  define S_DISP			STACK_SLOT - sizeof(jit_int16_t)
#  define I_DISP			STACK_SLOT - sizeof(jit_int32_t)
#endif

/*
 * Types
 */
typedef struct jit_pointer_t jit_va_list_t;

/*
 * Prototypes
 */
#define jit_make_arg(node,code)		_jit_make_arg(_jit,node,code)
static jit_node_t *_jit_make_arg(jit_state_t*,jit_node_t*,jit_code_t);
#define jit_make_arg_f(node)		_jit_make_arg_f(_jit,node)
static jit_node_t *_jit_make_arg_f(jit_state_t*,jit_node_t*);
#define jit_make_arg_d(node)		_jit_make_arg_d(_jit,node)
static jit_node_t *_jit_make_arg_d(jit_state_t*,jit_node_t*);
#define compute_framesize()		_compute_framesize(_jit)
static void _compute_framesize(jit_state_t*);
#define patch(instr, node)		_patch(_jit, instr, node)
static void _patch(jit_state_t*,jit_word_t,jit_node_t*);

#define PROTO				1
#  include "jit_rewind.c"
#  include "jit_mips-cpu.c"
#  include "jit_mips-fpu.c"
#  include "jit_fallback.c"
#undef PROTO

/*
 * Initialization
 */
jit_cpu_t		jit_cpu;
jit_register_t		_rvs[] = {
    { rc(gpr) | 0x01,			"at" },
    { rc(gpr) | 0x02,			"v0" },
    { rc(gpr) | 0x03,			"v1" },
#if !NEW_ABI
    { rc(gpr) | 0x08,			"t0" },
    { rc(gpr) | 0x09,			"t1" },
    { rc(gpr) | 0x0a,			"t2" },
    { rc(gpr) | 0x0b,			"t3" },
#endif
    { rc(gpr) | 0x0c,			"t4" },
    { rc(gpr) | 0x0d,			"t5" },
    { rc(gpr) | 0x0e,			"t6" },
    { rc(gpr) | 0x0f,			"t7" },
    { rc(gpr) | 0x18,			"t8" },
    { rc(gpr) | 0x19,			"t9" },
    { rc(sav) | rc(gpr) | 0x10,		"s0" },
    { rc(sav) | rc(gpr) | 0x11,		"s1" },
    { rc(sav) | rc(gpr) | 0x12,		"s2" },
    { rc(sav) | rc(gpr) | 0x13,		"s3" },
    { rc(sav) | rc(gpr) | 0x14,		"s4" },
    { rc(sav) | rc(gpr) | 0x15,		"s5" },
    { rc(sav) | rc(gpr) | 0x16,		"s6" },
    { rc(sav) | rc(gpr) | 0x17,		"s7" },
    { 0x00,				"zero" },
    { 0x1a,				"k0" },
    { 0x1b,				"k1" },
    { rc(sav) | 0x1f,			"ra" },
    { rc(sav) | 0x1c,			"gp" },
    { rc(sav) | 0x1d,			"sp" },
    { rc(sav) | 0x1e,			"fp" },
#if NEW_ABI
    { rc(gpr) | 0x0b,			"a7" },
    { rc(gpr) | 0x0a,			"a6" },
    { rc(gpr) | 0x09,			"a5" },
    { rc(gpr) | 0x08,			"a4" },
#endif
    { rc(arg) | rc(gpr) | 0x07,		"a3" },
    { rc(arg) | rc(gpr) | 0x06,		"a2" },
    { rc(arg) | rc(gpr) | 0x05,		"a1" },
    { rc(arg) | rc(gpr) | 0x04,		"a0" },
    { rc(fpr) | 0x00,			"$f0" },
    { rc(fpr) | 0x02,			"$f2" },
    { rc(fpr) | 0x04,			"$f4" },
    { rc(fpr) | 0x06,			"$f6" },
    { rc(fpr) | 0x08,			"$f8" },
    { rc(fpr) | 0x0a,			"$f10" },
#if !NEW_ABI
    { rc(sav) | rc(fpr) | 0x10,		"$f16" },
    { rc(sav) | rc(fpr) | 0x12,		"$f18" },
#endif
    { rc(sav) | rc(fpr) | 0x14,		"$f20" },
    { rc(sav) | rc(fpr) | 0x16,		"$f22" },
    { rc(sav) | rc(fpr) | 0x18,		"$f24" },
    { rc(sav) | rc(fpr) | 0x1a,		"$f26" },
    { rc(sav) | rc(fpr) | 0x1c,		"$f28" },
    { rc(sav) | rc(fpr) | 0x1e,		"$f30" },
#if NEW_ABI
    { rc(arg) | rc(fpr) | 0x13,		"$f19" },
    { rc(arg) | rc(fpr) | 0x12,		"$f18" },
    { rc(arg) | rc(fpr) | 0x11,		"$f17" },
    { rc(arg) | rc(fpr) | 0x10,		"$f16" },
    { rc(arg) | rc(fpr) | 0x0f,		"$f15" },
    { rc(arg) | rc(fpr) | 0x0e,		"$f14" },
    { rc(arg) | rc(fpr) | 0x0d,		"$f13" },
    { rc(arg) | rc(fpr) | 0x0c,		"$f12" },
#else
    { rc(arg) | rc(fpr) | 0x0e,		"$f14" },
    { rc(arg) | rc(fpr) | 0x0c,		"$f12" },
#endif
    { _NOREG,				"<none>" },
};

static jit_int32_t iregs[] = {
    _S0, _S1, _S2, _S3, _S4, _S5, _S6, _S7
};

static jit_int32_t fregs[] = {
#if !NEW_ABI
    _F16, _F18,
#endif
    _F20, _F22, _F24, _F26, _F28, _F30
};

/*
 * Implementation
 */
void
jit_get_cpu(void)
{
#if defined(__linux__)
    FILE	*fp;
    char	*ptr;
    char	 buf[128];

    if ((fp = fopen("/proc/cpuinfo", "r")) != NULL) {
	while (fgets(buf, sizeof(buf), fp)) {
	    if (strncmp(buf, "isa			: ", 8) == 0) {
		if ((ptr = strstr(buf + 9, "mips64r")))
		    jit_cpu.release = strtoul(ptr + 7, NULL, 10);
		break;
	    }
	}
	fclose(fp);
    }
#endif
    /* This is very fragile -- with clang, __mips is defined as 64 */
#if defined _MIPS_ARCH		/* OpenBSD/clang */
    if (!jit_cpu.release)
	jit_cpu.release = strtoul(&_MIPS_ARCH[4], NULL, 10);
#elif defined(__mips)		/* Linux/gcc */
    if (!jit_cpu.release)
	jit_cpu.release = __mips;
#endif
}

void
_jit_init(jit_state_t *_jit)
{
    _jitc->reglen = jit_size(_rvs) - 1;
/* Could also:
 *	o reserve a register for carry	(overkill)
 *	o use MTLO/MFLO			(performance hit)
 * So, keep a register allocated after setting carry, and implicitly
 * deallocate it if it can no longer be tracked
 */
    jit_carry = _NOREG;
}

void
_jit_prolog(jit_state_t *_jit)
{
    jit_int32_t		 offset;

    if (_jitc->function)
	jit_epilog();
    assert(jit_regset_cmp_ui(&_jitc->regarg, 0) == 0);
    jit_regset_set_ui(&_jitc->regsav, 0);
    offset = _jitc->functions.offset;
    if (offset >= _jitc->functions.length) {
	jit_realloc((jit_pointer_t *)&_jitc->functions.ptr,
		    _jitc->functions.length * sizeof(jit_function_t),
		    (_jitc->functions.length + 16) * sizeof(jit_function_t));
	_jitc->functions.length += 16;
    }
    _jitc->function = _jitc->functions.ptr + _jitc->functions.offset++;
    _jitc->function->self.size = stack_framesize;
    _jitc->function->self.argi = _jitc->function->self.argf =
	_jitc->function->self.aoff = _jitc->function->self.alen = 0;
    _jitc->function->self.call = jit_call_default;
    jit_alloc((jit_pointer_t *)&_jitc->function->regoff,
	      _jitc->reglen * sizeof(jit_int32_t));

    /* _no_link here does not mean the jit_link() call can be removed
     * by rewriting as:
     * _jitc->function->prolog = jit_new_node(jit_code_prolog);
     */
    _jitc->function->prolog = jit_new_node_no_link(jit_code_prolog);
    jit_link(_jitc->function->prolog);
    _jitc->function->prolog->w.w = offset;
    _jitc->function->epilog = jit_new_node_no_link(jit_code_epilog);
    /*	u:	label value
     *	v:	offset in blocks vector
     *	w:	offset in functions vector
     */
    _jitc->function->epilog->w.w = offset;

    jit_regset_new(&_jitc->function->regset);
}

jit_int32_t
_jit_allocai(jit_state_t *_jit, jit_int32_t length)
{
    assert(_jitc->function);
    jit_check_frame();
    switch (length) {
	case 0:	case 1:						break;
	case 2:		_jitc->function->self.aoff &= -2;	break;
	case 3:	case 4:	_jitc->function->self.aoff &= -4;	break;
	default:	_jitc->function->self.aoff &= -8;	break;
    }
    _jitc->function->self.aoff -= length;
    if (!_jitc->realize) {
	jit_inc_synth_ww(allocai, _jitc->function->self.aoff, length);
	jit_dec_synth();
    }
    return (_jitc->function->self.aoff);
}

void
_jit_allocar(jit_state_t *_jit, jit_int32_t u, jit_int32_t v)
{
    jit_int32_t		 reg;
    assert(_jitc->function);
    jit_inc_synth_ww(allocar, u, v);
    if (!_jitc->function->allocar) {
	_jitc->function->aoffoff = jit_allocai(sizeof(jit_int32_t));
	_jitc->function->allocar = 1;
    }
    reg = jit_get_reg(jit_class_gpr);
    jit_negr(reg, v);
    jit_andi(reg, reg, -8);
    jit_ldxi_i(u, JIT_FP, _jitc->function->aoffoff);
    jit_addr(u, u, reg);
    jit_addr(JIT_SP, JIT_SP, reg);
    jit_stxi_i(_jitc->function->aoffoff, JIT_FP, u);
    jit_unget_reg(reg);
    jit_dec_synth();
}

void
_jit_ret(jit_state_t *_jit)
{
    jit_node_t		*instr;
    assert(_jitc->function);
    jit_inc_synth(ret);
    /* jump to epilog */
    instr = jit_jmpi();
    jit_patch_at(instr, _jitc->function->epilog);
    jit_dec_synth();
}

void
_jit_retr(jit_state_t *_jit, jit_int32_t u, jit_code_t code)
{
    jit_code_inc_synth_w(code, u);
    jit_movr(JIT_RET, u);
    jit_ret();
    jit_dec_synth();
}

void
_jit_reti(jit_state_t *_jit, jit_word_t u, jit_code_t code)
{
    jit_code_inc_synth_w(code, u);
    jit_movi(JIT_RET, u);
    jit_ret();
    jit_dec_synth();
}

void
_jit_retr_f(jit_state_t *_jit, jit_int32_t u)
{
    jit_inc_synth_w(retr_f, u);
    if (JIT_FRET != u)
	jit_movr_f(JIT_FRET, u);
    else
	jit_live(JIT_FRET);
    jit_ret();
    jit_dec_synth();
}

void
_jit_reti_f(jit_state_t *_jit, jit_float32_t u)
{
    jit_inc_synth_f(reti_f, u);
    jit_movi_f(JIT_FRET, u);
    jit_ret();
    jit_dec_synth();
}

void
_jit_retr_d(jit_state_t *_jit, jit_int32_t u)
{
    jit_inc_synth_w(retr_d, u);
    if (JIT_FRET != u)
	jit_movr_d(JIT_FRET, u);
    else
	jit_live(JIT_FRET);
    jit_ret();
    jit_dec_synth();
}

void
_jit_reti_d(jit_state_t *_jit, jit_float64_t u)
{
    jit_inc_synth_d(reti_d, u);
    jit_movi_d(JIT_FRET, u);
    jit_ret();
    jit_dec_synth();
}

void
_jit_epilog(jit_state_t *_jit)
{
    assert(_jitc->function);
    assert(_jitc->function->epilog->next == NULL);
    jit_link(_jitc->function->epilog);
    _jitc->function = NULL;
}

jit_bool_t
_jit_arg_register_p(jit_state_t *_jit, jit_node_t *u)
{
    if (u->code >= jit_code_arg_c && u->code <= jit_code_arg)
	return (jit_arg_reg_p(u->u.w));
    assert(u->code == jit_code_arg_f || u->code == jit_code_arg_d);
#if NEW_ABI
    return (jit_arg_reg_p(u->u.w) || jit_arg_reg_p(u->u.w - 8));
#else
    return (u->u.w < 8);
#endif
}

static jit_node_t *
_jit_make_arg(jit_state_t *_jit, jit_node_t *node, jit_code_t code)
{
    jit_int32_t		 offset;
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->self.argi))
	offset = _jitc->function->self.argi++;
    else {
	offset = _jitc->function->self.size;
	_jitc->function->self.size += STACK_SLOT;
    }
#else
    offset = (_jitc->function->self.size - stack_framesize) >> STACK_SHIFT;
    ++_jitc->function->self.argi;
    if (offset >= 4)
	offset = _jitc->function->self.size;
    _jitc->function->self.size += STACK_SLOT;
#endif
    if (node == (jit_node_t *)0)
	node = jit_new_node(code);
    else
	link_node(node);
    node->u.w = offset;
    node->v.w = ++_jitc->function->self.argn;
    jit_link_prolog();
    return (node);
}

static jit_node_t *
_jit_make_arg_f(jit_state_t *_jit, jit_node_t *node)
{
    jit_int32_t		 offset;
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->self.argi)) {
	offset = _jitc->function->self.argi++;
	if (_jitc->function->self.call & jit_call_varargs)
	    offset += 8;
    }
    else {
	offset = _jitc->function->self.size;
	_jitc->function->self.size += STACK_SLOT;
    }
#else
    offset = (_jitc->function->self.size - stack_framesize) >> STACK_SHIFT;
    if (offset < NUM_WORD_ARGS) {
	if (!_jitc->function->self.argi &&
	    !(_jitc->function->self.call & jit_call_varargs)) {
	    if (offset == 0)
		offset = 4;
	    else {
		offset = 6;
		_jitc->function->self.argi = 1;
	    }
	    /* Use as flag to rewind in case of varargs function */
	    ++_jitc->function->self.argf;
	}
    }
    else
	offset = _jitc->function->self.size;
    _jitc->function->self.size += STACK_SLOT;
#endif
    if (node == (jit_node_t *)0)
	node = jit_new_node(jit_code_arg_f);
    else
	link_node(node);
    node->u.w = offset;
    node->v.w = ++_jitc->function->self.argn;
    jit_link_prolog();
    return (node);
}

static jit_node_t *
_jit_make_arg_d(jit_state_t *_jit, jit_node_t *node)
{
    jit_int32_t		 offset;
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->self.argi)) {
	offset = _jitc->function->self.argi++;
	if (_jitc->function->self.call & jit_call_varargs)
	    offset += 8;
    }
    else {
	offset = _jitc->function->self.size;
	_jitc->function->self.size += STACK_SLOT;
    }
#else
    if (_jitc->function->self.size & 7) {
	_jitc->function->self.size += 4;
	_jitc->function->self.argi = 1;
    }
    offset = (_jitc->function->self.size - stack_framesize) >> STACK_SHIFT;
    if (offset < NUM_WORD_ARGS) {
	if (!_jitc->function->self.argi &&
	    !(_jitc->function->self.call & jit_call_varargs)) {
	    offset += 4;
	    /* Use as flag to rewind in case of varargs function */
	    ++_jitc->function->self.argf;
	}
    }
    else
	offset = _jitc->function->self.size;
    _jitc->function->self.size += sizeof(jit_float64_t);
#endif
    if (node == (jit_node_t *)0)
	node = jit_new_node(jit_code_arg_d);
    else
	link_node(node);
    node->u.w = offset;
    node->v.w = ++_jitc->function->self.argn;
    jit_link_prolog();
    return (node);
}

void
_jit_ellipsis(jit_state_t *_jit)
{
    if (_jitc->prepare) {
	assert(!(_jitc->function->call.call & jit_call_varargs));
	_jitc->function->call.call |= jit_call_varargs;
#if !NEW_ABI
	if (_jitc->function->call.argf)
	    rewind_prepare();
#endif
    }
    else {
	assert(!(_jitc->function->self.call & jit_call_varargs));
#if NEW_ABI
	if (jit_arg_reg_p(_jitc->function->self.argi))
	    rewind_prolog();
	/* Do not set during possible rewind. */
	_jitc->function->self.call |= jit_call_varargs;
#else
	_jitc->function->self.call |= jit_call_varargs;
	if (_jitc->function->self.argf)
	    rewind_prolog();
#endif
	_jitc->function->vagp = _jitc->function->self.argi;
    }
    jit_inc_synth(ellipsis);
    jit_check_frame();
    if (_jitc->prepare)
	jit_link_prepare();
    else
	jit_link_prolog();
    jit_dec_synth();
}

void
_jit_va_push(jit_state_t *_jit, jit_int32_t u)
{
    jit_inc_synth_w(va_push, u);
    jit_pushargr(u);
    jit_dec_synth();
}

jit_node_t *
_jit_arg(jit_state_t *_jit, jit_code_t code)
{
    assert(_jitc->function);
    assert(!(_jitc->function->self.call & jit_call_varargs));
#if STRONG_TYPE_CHECKING
    assert(code >= jit_code_arg_c && code <= jit_code_arg);
#endif
    return (jit_make_arg((jit_node_t*)0, code));
}

jit_node_t *
_jit_arg_f(jit_state_t *_jit)
{
    assert(_jitc->function);
    return (jit_make_arg_f((jit_node_t*)0));
}

jit_node_t *
_jit_arg_d(jit_state_t *_jit)
{
    assert(_jitc->function);
    return (jit_make_arg_d((jit_node_t*)0));
}

void
_jit_getarg_c(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_c);
    jit_inc_synth_wp(getarg_c, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_extr_c(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_c(u, _FP, v->u.w + C_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_getarg_uc(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_c);
    jit_inc_synth_wp(getarg_uc, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_extr_uc(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_uc(u, _FP, v->u.w + C_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_getarg_s(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_s);
    jit_inc_synth_wp(getarg_s, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_extr_s(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_s(u, _FP, v->u.w + S_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_getarg_us(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_s);
    jit_inc_synth_wp(getarg_us, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_extr_us(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_us(u, _FP, v->u.w + S_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_getarg_i(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_i);
    jit_inc_synth_wp(getarg_i, u, v);
    if (jit_arg_reg_p(v->u.w)) {
#if __WORDSIZE == 64
	jit_extr_i(u, _A0 - v->u.w);
#else
	jit_movr(u, _A0 - v->u.w);
#endif
    }
    else {
	jit_node_t	*node = jit_ldxi_i(u, _FP, v->u.w + I_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

#if __WORDSIZE == 64
void
_jit_getarg_ui(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_i);
    jit_inc_synth_wp(getarg_ui, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_extr_ui(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_ui(u, _FP, v->u.w + I_DISP);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_getarg_l(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert_arg_type(v->code, jit_code_arg_l);
    jit_inc_synth_wp(getarg_l, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_movr(u, _A0 - v->u.w);
    else {
	jit_node_t	*node = jit_ldxi_l(u, _FP, v->u.w);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}
#endif

void
_jit_putargr(jit_state_t *_jit, jit_int32_t u, jit_node_t *v, jit_code_t code)
{
    assert_putarg_type(code, v->code);
    jit_code_inc_synth_wp(code, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_movr(_A0 - v->u.w, u);
    else {
	jit_node_t	*node = jit_stxi(v->u.w + WORD_ADJUST, _FP, u);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_putargi(jit_state_t *_jit, jit_word_t u, jit_node_t *v, jit_code_t code)
{
    jit_int32_t		regno;
    assert_putarg_type(code, v->code);
    jit_code_inc_synth_wp(code, u, v);
    if (jit_arg_reg_p(v->u.w))
	jit_movi(_A0 - v->u.w, u);
    else {
	jit_node_t	*node;
	regno = jit_get_reg(jit_class_gpr);
	jit_movi(regno, u);
	node = jit_stxi(v->u.w + WORD_ADJUST, _FP, regno);
	jit_link_alist(node);
	jit_check_frame();
	jit_unget_reg(regno);
    }
    jit_dec_synth();
}

void
_jit_getarg_f(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert(v->code == jit_code_arg_f);
    jit_inc_synth_wp(getarg_f, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movr_f(u, _F12 - v->u.w);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movr_w_f(u, _A0 - (v->u.w - 8));
#else
    if (v->u.w < 4)
	jit_movr_w_f(u, _A0 - v->u.w);
    else if (v->u.w < 8)
	jit_movr_f(u, _F12 - ((v->u.w - 4) >> 1));
#endif
    else {
	jit_node_t	*node = jit_ldxi_f(u, _FP, v->u.w);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_putargr_f(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert(v->code == jit_code_arg_f);
    jit_inc_synth_wp(putargr_f, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movr_f(_F12 - v->u.w, u);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movr_f_w(_A0 - (v->u.w - 8), u);
#else
    if (v->u.w < 4)
	jit_movr_f_w(_A0 - v->u.w, u);
    else if (v->u.w < 8)
	jit_movr_f(_F12 - ((v->u.w - 4) >> 1), u);
#endif
    else {
	jit_node_t	*node = jit_stxi_f(v->u.w, _FP, u);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_putargi_f(jit_state_t *_jit, jit_float32_t u, jit_node_t *v)
{
    jit_int32_t		regno;
    assert(v->code == jit_code_arg_f);
    jit_inc_synth_fp(putargi_f, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movi_f(_F12 - v->u.w, u);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movi_f_w(_A0 - (v->u.w - 8), u);
#else
    if (v->u.w < 4) {
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_f(regno, u);
	jit_movr_f_w(_A0 - ((v->u.w - 4) >> 1), regno);
	jit_unget_reg(regno);
    }
    else if (v->u.w < 8)
	jit_movi_f(_F12 - ((v->u.w - 4) >> 1), u);
#endif
    else {
	jit_node_t	*node;
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_f(regno, u);
	node = jit_stxi_f(v->u.w, _FP, regno);
	jit_link_alist(node);
	jit_check_frame();
	jit_unget_reg(regno);
    }
    jit_dec_synth();
}

void
_jit_getarg_d(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert(v->code == jit_code_arg_d);
    jit_inc_synth_wp(getarg_d, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movr_d(u, _F12 - v->u.w);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movr_d_w(_A0 - (v->u.w - 8), u);
#else
    if (v->u.w < 4)
	jit_movr_ww_d(u, _A0 - v->u.w, _A0 - (v->u.w + 1));
    else if (v->u.w < 8)
	jit_movr_d(u, _F12 - ((v->u.w - 4) >> 1));
#endif
    else {
	jit_node_t	*node = jit_ldxi_d(u, _FP, v->u.w);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_putargr_d(jit_state_t *_jit, jit_int32_t u, jit_node_t *v)
{
    assert(v->code == jit_code_arg_d);
    jit_inc_synth_wp(putargr_d, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movr_d(_F12 - v->u.w, u);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movr_d_w(_A0 - (v->u.w - 8), u);
#else
    if (v->u.w < 4)
	jit_movr_d_ww(_A0 - v->u.w, _A0 - (v->u.w + 1), u);
    else if (v->u.w < 8)
	jit_movr_d(_F12 - ((v->u.w - 4) >> 1), u);
#endif
    else {
	jit_node_t	*node = jit_stxi_d(v->u.w, _FP, u);
	jit_link_alist(node);
	jit_check_frame();
    }
    jit_dec_synth();
}

void
_jit_putargi_d(jit_state_t *_jit, jit_float64_t u, jit_node_t *v)
{
    jit_int32_t		regno;
    assert(v->code == jit_code_arg_d);
    jit_inc_synth_dp(putargi_d, u, v);
#if NEW_ABI
    if (jit_arg_reg_p(v->u.w))
	jit_movi_d(_F12 - v->u.w, u);
    else if (jit_arg_reg_p(v->u.w - 8))
	jit_movi_d_w(_A0 - (v->u.w - 8), u);
#else
    if (v->u.w < 4) {
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_d(regno, u);
	jit_movr_d_ww(_A0 - v->u.w, _A0 - (v->u.w + 1), regno);
	jit_unget_reg(regno);
    }
    else if (v->u.w < 8)
	jit_movi_d(_F12 - ((v->u.w - 4) >> 1), u);
#endif
    else {
	jit_node_t	*node;
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_d(regno, u);
	node = jit_stxi_d(v->u.w, _FP, regno);
	jit_link_alist(node);
	jit_check_frame();
	jit_unget_reg(regno);
    }
    jit_dec_synth();
}

void
_jit_pushargr(jit_state_t *_jit, jit_int32_t u, jit_code_t code)
{
    jit_code_inc_synth_w(code, u);
    jit_link_prepare();
#if NEW_ABI
    assert(_jitc->function);
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	jit_movr(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	jit_stxi(_jitc->function->call.size + WORD_ADJUST, JIT_SP, u);
	_jitc->function->call.size += STACK_SLOT;
    }
#else
    jit_word_t		offset;
    assert(_jitc->function);
    offset = _jitc->function->call.size >> STACK_SHIFT;
    ++_jitc->function->call.argi;
    if (jit_arg_reg_p(offset))
	jit_movr(_A0 - offset, u);
    else {
	jit_check_frame();
	jit_stxi(_jitc->function->call.size, JIT_SP, u);
    }
    _jitc->function->call.size += STACK_SLOT;
#endif
    jit_dec_synth();
}

void
_jit_pushargi(jit_state_t *_jit, jit_word_t u, jit_code_t code)
{
    jit_int32_t		regno;
#if !NEW_ABI
    jit_word_t		offset;
#endif
    assert(_jitc->function);
    jit_code_inc_synth_w(code, u);
    jit_link_prepare();
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	jit_movi(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_gpr);
	jit_movi(regno, u);
	jit_stxi(_jitc->function->call.size + WORD_ADJUST, JIT_SP, regno);
	_jitc->function->call.size += STACK_SLOT;
	jit_unget_reg(regno);
    }
#else
    offset = _jitc->function->call.size >> STACK_SHIFT;
    ++_jitc->function->call.argi;
    if (jit_arg_reg_p(offset))
	jit_movi(_A0 - offset, u);
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_gpr);
	jit_movi(regno, u);
	jit_stxi(_jitc->function->call.size, JIT_SP, regno);
	jit_unget_reg(regno);
    }
    _jitc->function->call.size += STACK_SLOT;
#endif
    jit_dec_synth();
}

void
_jit_pushargr_f(jit_state_t *_jit, jit_int32_t u)
{
#if !NEW_ABI
    jit_word_t		offset;
#endif
    assert(_jitc->function);
    jit_inc_synth_w(pushargr_f, u);
    jit_link_prepare();
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	if (!(_jitc->function->call.call & jit_call_varargs))
	    jit_movr_f(_F12 - _jitc->function->call.argi, u);
	else
	    jit_movr_f_w(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	jit_stxi_f(_jitc->function->call.size, JIT_SP, u);
	_jitc->function->call.size += STACK_SLOT;
    }
#else
    offset = _jitc->function->call.size >> STACK_SHIFT;
    if (offset < 2 && !_jitc->function->call.argi &&
	!(_jitc->function->call.call & jit_call_varargs)) {
	++_jitc->function->call.argf;
	jit_movr_f(_F12 - offset, u);
    }
    else if (offset < 4) {
	++_jitc->function->call.argi;
	jit_movr_f_w(_A0 - offset, u);
    }
    else {
	jit_check_frame();
	jit_stxi_f(_jitc->function->call.size, JIT_SP, u);
    }
    _jitc->function->call.size += STACK_SLOT;
#endif
    jit_dec_synth();
}

void
_jit_pushargi_f(jit_state_t *_jit, jit_float32_t u)
{
    jit_int32_t		regno;
#if !NEW_ABI
    jit_word_t		offset;
#endif
    assert(_jitc->function);
    jit_inc_synth_f(pushargi_f, u);
    jit_link_prepare();
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	if (!(_jitc->function->call.call & jit_call_varargs))
	    jit_movi_f(_F12 - _jitc->function->call.argi, u);
	else
	    jit_movi_f_w(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_f(regno, u);
	jit_stxi_f(_jitc->function->call.size, JIT_SP, regno);
	_jitc->function->call.size += STACK_SLOT;
	jit_unget_reg(regno);
    }
#else
    offset = _jitc->function->call.size >> STACK_SHIFT;
    if (offset < 2 && !_jitc->function->call.argi &&
	!(_jitc->function->call.call & jit_call_varargs)) {
	++_jitc->function->call.argf;
	jit_movi_f(_F12 - offset, u);
    }
    else if (offset < 4) {
	++_jitc->function->call.argi;
	jit_movi_f_w(_A0 - offset, u);
    }
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_f(regno, u);
	jit_stxi_f(_jitc->function->call.size, JIT_SP, regno);
	jit_unget_reg(regno);
    }
    _jitc->function->call.size += STACK_SLOT;
#endif
    jit_dec_synth();
}

void
_jit_pushargr_d(jit_state_t *_jit, jit_int32_t u)
{
#if !NEW_ABI
    jit_bool_t		adjust;
    jit_word_t		offset;
#endif
    assert(_jitc->function);
    jit_inc_synth_w(pushargr_d, u);
    jit_link_prepare();
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	if (!(_jitc->function->call.call & jit_call_varargs))
	    jit_movr_d(_F12 - _jitc->function->call.argi, u);
	else
	    jit_movr_d_w(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	jit_stxi_d(_jitc->function->call.size, JIT_SP, u);
	_jitc->function->call.size += STACK_SLOT;
    }
#else
    adjust = !!_jitc->function->call.argi;
    if (_jitc->function->call.size & 7) {
	_jitc->function->call.size += 4;
	adjust = 1;
    }
    offset = _jitc->function->call.size >> STACK_SHIFT;
    if (offset < 3) {
	if (adjust || (_jitc->function->call.call & jit_call_varargs)) {
	    jit_movr_d_ww(_A0 - offset, _A0 - (offset + 1), u);
	    _jitc->function->call.argi += 2;
	}
	else {
	    jit_movr_d(_F12 - (offset >> 1), u);
	    ++_jitc->function->call.argf;
	}
    }
    else {
	jit_check_frame();
	jit_stxi_d(_jitc->function->call.size, JIT_SP, u);
    }
    _jitc->function->call.size += sizeof(jit_float64_t);
#endif
    jit_dec_synth();
}

void
_jit_pushargi_d(jit_state_t *_jit, jit_float64_t u)
{
    jit_int32_t		regno;
#if !NEW_ABI
    jit_bool_t		adjust;
    jit_word_t		offset;
#endif
    assert(_jitc->function);
    jit_inc_synth_d(pushargi_d, u);
    jit_link_prepare();
#if NEW_ABI
    if (jit_arg_reg_p(_jitc->function->call.argi)) {
	if (!(_jitc->function->call.call & jit_call_varargs))
	    jit_movi_d(_F12 - _jitc->function->call.argi, u);
	else
	    jit_movi_d_w(_A0 - _jitc->function->call.argi, u);
	++_jitc->function->call.argi;
    }
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_d(regno, u);
	jit_stxi_d(_jitc->function->call.size, JIT_SP, regno);
	_jitc->function->call.size += STACK_SLOT;
	jit_unget_reg(regno);
    }
#else
    adjust = !!_jitc->function->call.argi;
    if (_jitc->function->call.size & 7) {
	_jitc->function->call.size += 4;
	adjust = 1;
    }
    offset = _jitc->function->call.size >> STACK_SHIFT;
    if (offset < 3) {
	if (adjust || (_jitc->function->call.call & jit_call_varargs)) {
	    jit_movi_d_ww(_A0 - offset, _A0 - (offset + 1), u);
	    _jitc->function->call.argi += 2;
	}
	else {
	    jit_movi_d(_F12 - (offset >> 1), u);
	    ++_jitc->function->call.argf;
	}
    }
    else {
	jit_check_frame();
	regno = jit_get_reg(jit_class_fpr);
	jit_movi_d(regno, u);
	jit_stxi_d(_jitc->function->call.size, JIT_SP, regno);
	jit_unget_reg(regno);
    }
    _jitc->function->call.size += sizeof(jit_float64_t);
#endif
    jit_dec_synth();
}

jit_bool_t
_jit_regarg_p(jit_state_t *_jit, jit_node_t *node, jit_int32_t regno)
{
    jit_int32_t		spec;

    spec = jit_class(_rvs[regno].spec);
    if (spec & jit_class_arg) {
	if (spec & jit_class_gpr) {
	    regno = _A0 - regno;
	    if (regno >= 0 && regno < node->v.w)
		return (1);
	}
	else if (spec & jit_class_fpr) {
	    regno = _F12 - regno;
	    if (regno >= 0 && regno < node->w.w)
		return (1);
	}
    }

    return (0);
}

void
_jit_finishr(jit_state_t *_jit, jit_int32_t r0)
{
    jit_node_t		*call;
    assert(_jitc->function);
    jit_check_frame();
    jit_inc_synth_w(finishr, r0);
    if (_jitc->function->self.alen < _jitc->function->call.size)
	_jitc->function->self.alen = _jitc->function->call.size;
    call = jit_callr(r0);
    call->v.w = _jitc->function->self.argi;
#if NEW_ABI
    call->w.w = call->v.w;
#else
    call->w.w = _jitc->function->self.argf;
#endif
    _jitc->function->call.argi = _jitc->function->call.argf =
	_jitc->function->call.size = 0;
    _jitc->prepare = 0;
    jit_dec_synth();
}

jit_node_t *
_jit_finishi(jit_state_t *_jit, jit_pointer_t i0)
{
    jit_node_t		*call;
    assert(_jitc->function);
    jit_check_frame();
    jit_inc_synth_w(finishi, (jit_word_t)i0);
    if (_jitc->function->self.alen < _jitc->function->call.size)
	_jitc->function->self.alen = _jitc->function->call.size;
    call = jit_calli(i0);
    call->v.w = _jitc->function->call.argi;
#if NEW_ABI
    call->w.w = call->v.w;
#else
    call->w.w = _jitc->function->call.argf;
#endif
    _jitc->function->call.argi = _jitc->function->call.argf =
	_jitc->function->call.size = 0;
    _jitc->prepare = 0;
    jit_dec_synth();
    return (call);
}

void
_jit_retval_c(jit_state_t *_jit, jit_int32_t r0)
{
    jit_extr_c(r0, JIT_RET);
}

void
_jit_retval_uc(jit_state_t *_jit, jit_int32_t r0)
{
    jit_extr_uc(r0, JIT_RET);
}

void
_jit_retval_s(jit_state_t *_jit, jit_int32_t r0)
{
    jit_extr_s(r0, JIT_RET);
}

void
_jit_retval_us(jit_state_t *_jit, jit_int32_t r0)
{
    jit_extr_us(r0, JIT_RET);
}

void
_jit_retval_i(jit_state_t *_jit, jit_int32_t r0)
{
#if __WORDSIZE == 32
    if (r0 != JIT_RET)
	jit_movr(r0, JIT_RET);
#else
    jit_extr_i(r0, JIT_RET);
#endif
}

#if __WORDSIZE == 64
void
_jit_retval_ui(jit_state_t *_jit, jit_int32_t r0)
{
    jit_extr_ui(r0, JIT_RET);
}

void
_jit_retval_l(jit_state_t *_jit, jit_int32_t r0)
{
    if (r0 != JIT_RET)
	jit_movr(r0, JIT_RET);
}
#endif

void
_jit_retval_f(jit_state_t *_jit, jit_int32_t r0)
{
    if (r0 != JIT_FRET)
	jit_movr_f(r0, JIT_FRET);
}

void
_jit_retval_d(jit_state_t *_jit, jit_int32_t r0)
{
    if (r0 != JIT_FRET)
	jit_movr_d(r0, JIT_FRET);
}

jit_pointer_t
_emit_code(jit_state_t *_jit)
{
    jit_node_t		*node, *prev = NULL;
    jit_node_t		*temp;
    jit_word_t		 word;
    jit_int32_t		 value;
    jit_int32_t		 offset;

    struct {
	jit_node_t	*node;
	jit_word_t	 word;
	jit_function_t	 func;
#if DEVEL_DISASSEMBLER
	jit_word_t	 prevw;
#endif
	jit_int32_t	 patch_offset;
    } undo;
#if DEVEL_DISASSEMBLER
    jit_word_t		 prevw;
#endif

    _jitc->function = NULL;

    jit_reglive_setup();

    undo.word = 0;
    undo.node = NULL;
    undo.patch_offset = 0;
#define case_rr(name, type)						\
	    case jit_code_##name##r##type:				\
		name##r##type(rn(node->u.w), rn(node->v.w));		\
		break
#define case_rw(name, type)						\
	    case jit_code_##name##i##type:				\
		name##i##type(rn(node->u.w), node->v.w);		\
		break
#define case_wr(name, type)						\
	    case jit_code_##name##i##type:				\
		name##i##type(node->u.w, rn(node->v.w));		\
		break
#define case_rrr(name, type)						\
	    case jit_code_##name##r##type:				\
		name##r##type(rn(node->u.w),				\
			      rn(node->v.w), rn(node->w.w));		\
		break
#define case_rrw(name, type)						\
	    case jit_code_##name##i##type:				\
		name##i##type(rn(node->u.w), rn(node->v.w), node->w.w);	\
		break
#define case_rrrr(name, type)						\
	    case jit_code_##name##r##type:				\
		name##r##type(rn(node->u.q.l), rn(node->u.q.h),		\
			      rn(node->v.w), rn(node->w.w));		\
		break
#define case_rrrw(name, type)						\
	    case jit_code_##name##i##type:				\
		name##i##type(rn(node->u.q.l), rn(node->u.q.h),		\
			      rn(node->v.w), node->w.w);		\
		break
#define case_rrf(name, type, size)					\
	    case jit_code_##name##i##type:				\
		assert(node->flag & jit_flag_data);			\
		name##i##type(rn(node->u.w), rn(node->v.w),		\
			      (jit_float##size##_t *)node->w.n->u.w);	\
		break
#define case_wrr(name, type)						\
	    case jit_code_##name##i##type:				\
		name##i##type(node->u.w, rn(node->v.w), rn(node->w.w));	\
		break
#define case_brr(name, type)						\
	    case jit_code_##name##r##type:				\
		temp = node->u.n;					\
		assert(temp->code == jit_code_label ||			\
		       temp->code == jit_code_epilog);			\
		if (temp->flag & jit_flag_patch)			\
		    name##r##type(temp->u.w, rn(node->v.w),		\
				  rn(node->w.w));			\
		else {							\
		    word = name##r##type(_jit->pc.w,			\
					 rn(node->v.w), rn(node->w.w));	\
		    patch(word, node);					\
		}							\
		break
#define case_brrn(name, type, prev)					\
	    case jit_code_##name##r##type:				\
		temp = node->u.n;					\
		assert(temp->code == jit_code_label ||			\
		       temp->code == jit_code_epilog);			\
		if (temp->flag & jit_flag_patch)			\
		    name##r##type(temp->u.w, rn(node->v.w),		\
				  rn(node->w.w), prev);			\
		else {							\
		    word = name##r##type(_jit->pc.w,			\
					 rn(node->v.w), rn(node->w.w),	\
					 prev);				\
		    patch(word, node);					\
		}							\
		break
#define case_brw(name, type)						\
	    case jit_code_##name##i##type:				\
		temp = node->u.n;					\
		assert(temp->code == jit_code_label ||			\
		       temp->code == jit_code_epilog);			\
		if (temp->flag & jit_flag_patch)			\
		    name##i##type(temp->u.w,				\
				  rn(node->v.w), node->w.w);		\
		else {							\
		    word = name##i##type(_jit->pc.w,			\
					 rn(node->v.w), node->w.w);	\
		    patch(word, node);					\
		}							\
		break
#define case_brwn(name, type, prev)					\
	    case jit_code_##name##i##type:				\
		temp = node->u.n;					\
		assert(temp->code == jit_code_label ||			\
		       temp->code == jit_code_epilog);			\
		if (temp->flag & jit_flag_patch)			\
		    name##i##type(temp->u.w,				\
				  rn(node->v.w), node->w.w, prev);	\
		else {							\
		    word = name##i##type(_jit->pc.w,			\
					 rn(node->v.w), node->w.w,	\
					 prev);				\
		    patch(word, node);					\
		}							\
		break
#define case_brf(name, type, size)					\
	    case jit_code_##name##i##type:				\
		temp = node->u.n;					\
		assert(temp->code == jit_code_label ||			\
		       temp->code == jit_code_epilog);			\
		if (temp->flag & jit_flag_patch)			\
		    name##i##type(temp->u.w, rn(node->v.w),		\
				(jit_float##size##_t *)node->w.n->u.w);	\
		else {							\
		    word = name##i##type(_jit->pc.w, rn(node->v.w),	\
				(jit_float##size##_t *)node->w.n->u.w);	\
		    patch(word, node);					\
		}							\
		break
#if DEVEL_DISASSEMBLER
    prevw = _jit->pc.w;
#endif
    for (node = _jitc->head; node; node = node->next) {
	if (_jit->pc.uc >= _jitc->code.end)
	    return (NULL);

#if DEVEL_DISASSEMBLER
	node->offset = (jit_uword_t)_jit->pc.w - (jit_uword_t)prevw;
	prevw = _jit->pc.w;
#endif
	value = jit_classify(node->code);
	jit_regarg_set(node, value);
	switch (node->code) {
	    case jit_code_align:
		/* Must align to a power of two */
		assert(!(node->u.w & (node->u.w - 1)));
		if ((word = _jit->pc.w & (node->u.w - 1)))
		    nop(node->u.w - word);
		break;
	    case jit_code_skip:
	        nop((node->u.w + 3) & ~3);
		break;
	    case jit_code_note:		case jit_code_name:
		node->u.w = _jit->pc.w;
		break;
	    case jit_code_label:
		/* remember label is defined */
		node->flag |= jit_flag_patch;
		node->u.w = _jit->pc.w;
		break;
		case_rrr(add,);
		case_rrw(add,);
		case_rrr(addc,);
		case_rrw(addc,);
		case_rrr(addx,);
		case_rrw(addx,);
		case_rrr(sub,);
		case_rrw(sub,);
		case_rrr(subc,);
		case_rrw(subc,);
		case_rrr(subx,);
		case_rrw(subx,);
		case_rrw(rsb,);
		case_rrr(mul,);
		case_rrw(mul,);
		case_rrrr(qmul,);
		case_rrrw(qmul,);
		case_rrrr(qmul, _u);
		case_rrrw(qmul, _u);
		case_rrr(div,);
		case_rrw(div,);
		case_rrr(div, _u);
		case_rrw(div, _u);
		case_rrrr(qdiv,);
		case_rrrw(qdiv,);
		case_rrrr(qdiv, _u);
		case_rrrw(qdiv, _u);
		case_rrr(rem,);
		case_rrw(rem,);
		case_rrr(rem, _u);
		case_rrw(rem, _u);
		case_rrr(lsh,);
		case_rrw(lsh,);
		case_rrr(rsh,);
		case_rrw(rsh,);
		case_rrr(rsh, _u);
		case_rrw(rsh, _u);
		case_rrr(and,);
		case_rrw(and,);
		case_rrr(or,);
		case_rrw(or,);
		case_rrr(xor,);
		case_rrw(xor,);
		case_rr(trunc, _f_i);
		case_rr(trunc, _d_i);
#if __WORDSIZE == 64
		case_rr(trunc, _f_l);
		case_rr(trunc, _d_l);
#endif
		case_rr(ld, _c);
		case_rw(ld, _c);
		case_rr(ld, _uc);
		case_rw(ld, _uc);
		case_rr(ld, _s);
		case_rw(ld, _s);
		case_rr(ld, _us);
		case_rw(ld, _us);
		case_rr(ld, _i);
		case_rw(ld, _i);
#if __WORDSIZE == 64
		case_rr(ld, _ui);
		case_rw(ld, _ui);
		case_rr(ld, _l);
		case_rw(ld, _l);
#endif
		case_rrr(ldx, _c);
		case_rrw(ldx, _c);
		case_rrr(ldx, _uc);
		case_rrw(ldx, _uc);
		case_rrr(ldx, _s);
		case_rrw(ldx, _s);
		case_rrr(ldx, _us);
		case_rrw(ldx, _us);
		case_rrr(ldx, _i);
		case_rrw(ldx, _i);
#if __WORDSIZE == 64
		case_rrr(ldx, _ui);
		case_rrw(ldx, _ui);
		case_rrr(ldx, _l);
		case_rrw(ldx, _l);
#endif
		case_rr(st, _c);
		case_wr(st, _c);
		case_rr(st, _s);
		case_wr(st, _s);
		case_rr(st, _i);
		case_wr(st, _i);
#if __WORDSIZE == 64
		case_rr(st, _l);
		case_wr(st, _l);
#endif
		case_rrr(stx, _c);
		case_wrr(stx, _c);
		case_rrr(stx, _s);
		case_wrr(stx, _s);
		case_rrr(stx, _i);
		case_wrr(stx, _i);
#if __WORDSIZE == 64
		case_rrr(stx, _l);
		case_wrr(stx, _l);
#endif
		case_rr(hton, _us);
		case_rr(hton, _ui);
#if __WORDSIZE == 64
		case_rr(hton, _ul);
#endif
		case_rr(bswap, _us);
		case_rr(bswap, _ui);
#if __WORDSIZE == 64
		case_rr(bswap, _ul);
#endif
		case_rr(ext, _c);
		case_rr(ext, _uc);
		case_rr(ext, _s);
		case_rr(ext, _us);
#if __WORDSIZE == 64
		case_rr(ext, _i);
		case_rr(ext, _ui);
#endif
	    case jit_code_casr:
		casr(rn(node->u.w), rn(node->v.w),
		     rn(node->w.q.l), rn(node->w.q.h));
		break;
	    case jit_code_casi:
		casi(rn(node->u.w), node->v.w,
		     rn(node->w.q.l), rn(node->w.q.h));
		break;
		case_rrr(movn,);
		case_rrr(movz,);
		case_rr(mov,);
	    case jit_code_movi:
		if (node->flag & jit_flag_node) {
		    temp = node->v.n;
		    if (temp->code == jit_code_data ||
			(temp->code == jit_code_label &&
			 (temp->flag & jit_flag_patch)))
			movi(rn(node->u.w), temp->u.w);
		    else {
			assert(temp->code == jit_code_label ||
			       temp->code == jit_code_epilog);
			word = movi_p(rn(node->u.w), node->v.w);
			patch(word, node);
		    }
		}
		else
		    movi(rn(node->u.w), node->v.w);
		break;
		case_rr(neg,);
		case_rr(com,);
		case_rr(clo,);
		case_rr(clz,);
		case_rr(cto,);
		case_rr(ctz,);
		case_rrr(lt,);
		case_rrw(lt,);
		case_rrr(lt, _u);
		case_rrw(lt, _u);
		case_rrr(le,);
		case_rrw(le,);
		case_rrr(le, _u);
		case_rrw(le, _u);
		case_rrr(eq,);
		case_rrw(eq,);
		case_rrr(ge,);
		case_rrw(ge,);
		case_rrr(ge, _u);
		case_rrw(ge, _u);
		case_rrr(gt,);
		case_rrw(gt,);
		case_rrr(gt, _u);
		case_rrw(gt, _u);
		case_rrr(ne,);
		case_rrw(ne,);
		case_brrn(blt,, prev);
		case_brwn(blt,, prev);
		case_brrn(blt, _u, prev);
		case_brwn(blt, _u, prev);
		case_brrn(ble,, prev);
		case_brwn(ble,, prev);
		case_brrn(ble, _u, prev);
		case_brwn(ble, _u, prev);
		case_brrn(beq,, prev);
		case_brwn(beq,, prev);
		case_brrn(bge,, prev);
		case_brwn(bge,, prev);
		case_brrn(bge, _u, prev);
		case_brwn(bge, _u, prev);
		case_brrn(bgt,, prev);
		case_brwn(bgt,, prev);
		case_brrn(bgt, _u, prev);
		case_brwn(bgt, _u, prev);
		case_brrn(bne,, prev);
		case_brwn(bne,, prev);
		case_brr(boadd,);
		case_brw(boadd,);
		case_brr(boadd, _u);
		case_brw(boadd, _u);
		case_brr(bxadd,);
		case_brw(bxadd,);
		case_brr(bxadd, _u);
		case_brw(bxadd, _u);
		case_brr(bosub,);
		case_brw(bosub,);
		case_brr(bosub, _u);
		case_brw(bosub, _u);
		case_brr(bxsub,);
		case_brw(bxsub,);
		case_brr(bxsub, _u);
		case_brw(bxsub, _u);
		case_brr(bms,);
		case_brw(bms,);
		case_brr(bmc,);
		case_brw(bmc,);
		case_rrr(add, _f);
		case_rrf(add, _f, 32);
		case_rrr(sub, _f);
		case_rrf(sub, _f, 32);
		case_rrf(rsb, _f, 32);
		case_rrr(mul, _f);
		case_rrf(mul, _f, 32);
		case_rrr(div, _f);
		case_rrf(div, _f, 32);
		case_rr(abs, _f);
		case_rr(neg, _f);
		case_rr(sqrt, _f);
		case_rr(ext, _f);
		case_rr(ld, _f);
		case_rw(ld, _f);
		case_rrr(ldx, _f);
		case_rrw(ldx, _f);
		case_rr(st, _f);
		case_wr(st, _f);
		case_rrr(stx, _f);
		case_wrr(stx, _f);
		case_rr(mov, _f);
	    case jit_code_movi_f:
		assert(node->flag & jit_flag_data);
		movi_f(rn(node->u.w), (jit_float32_t *)node->v.n->u.w);
		break;
		case_rr(ext, _d_f);
		case_rrr(lt, _f);
		case_rrf(lt, _f, 32);
		case_rrr(le, _f);
		case_rrf(le, _f, 32);
		case_rrr(eq, _f);
		case_rrf(eq, _f, 32);
		case_rrr(ge, _f);
		case_rrf(ge, _f, 32);
		case_rrr(gt, _f);
		case_rrf(gt, _f, 32);
		case_rrr(ne, _f);
		case_rrf(ne, _f, 32);
		case_rrr(unlt, _f);
		case_rrf(unlt, _f, 32);
		case_rrr(unle, _f);
		case_rrf(unle, _f, 32);
		case_rrr(uneq, _f);
		case_rrf(uneq, _f, 32);
		case_rrr(unge, _f);
		case_rrf(unge, _f, 32);
		case_rrr(ungt, _f);
		case_rrf(ungt, _f, 32);
		case_rrr(ltgt, _f);
		case_rrf(ltgt, _f, 32);
		case_rrr(ord, _f);
		case_rrf(ord, _f, 32);
		case_rrr(unord, _f);
		case_rrf(unord, _f, 32);
		case_brr(blt, _f);
		case_brf(blt, _f, 32);
		case_brr(ble, _f);
		case_brf(ble, _f, 32);
		case_brr(beq, _f);
		case_brf(beq, _f, 32);
		case_brr(bge, _f);
		case_brf(bge, _f, 32);
		case_brr(bgt, _f);
		case_brf(bgt, _f, 32);
		case_brr(bne, _f);
		case_brf(bne, _f, 32);
		case_brr(bunlt, _f);
		case_brf(bunlt, _f, 32);
		case_brr(bunle, _f);
		case_brf(bunle, _f, 32);
		case_brr(buneq, _f);
		case_brf(buneq, _f, 32);
		case_brr(bunge, _f);
		case_brf(bunge, _f, 32);
		case_brr(bungt, _f);
		case_brf(bungt, _f, 32);
		case_brr(bltgt, _f);
		case_brf(bltgt, _f, 32);
		case_brr(bord, _f);
		case_brf(bord, _f, 32);
		case_brr(bunord, _f);
		case_brf(bunord, _f, 32);
		case_rrr(add, _d);
		case_rrf(add, _d, 64);
		case_rrr(sub, _d);
		case_rrf(sub, _d, 64);
		case_rrf(rsb, _d, 64);
		case_rrr(mul, _d);
		case_rrf(mul, _d, 64);
		case_rrr(div, _d);
		case_rrf(div, _d, 64);
		case_rr(abs, _d);
		case_rr(neg, _d);
		case_rr(sqrt, _d);
		case_rr(ext, _d);
		case_rr(ld, _d);
		case_rw(ld, _d);
		case_rrr(ldx, _d);
		case_rrw(ldx, _d);
		case_rr(st, _d);
		case_wr(st, _d);
		case_rrr(stx, _d);
		case_wrr(stx, _d);
		case_rr(mov, _d);
	    case jit_code_movi_d:
		assert(node->flag & jit_flag_data);
		movi_d(rn(node->u.w), (jit_float64_t *)node->v.n->u.w);
		break;
		case_rr(ext, _f_d);
		case_rrr(lt, _d);
		case_rrf(lt, _d, 64);
		case_rrr(le, _d);
		case_rrf(le, _d, 64);
		case_rrr(eq, _d);
		case_rrf(eq, _d, 64);
		case_rrr(ge, _d);
		case_rrf(ge, _d, 64);
		case_rrr(gt, _d);
		case_rrf(gt, _d, 64);
		case_rrr(ne, _d);
		case_rrf(ne, _d, 64);
		case_rrr(unlt, _d);
		case_rrf(unlt, _d, 64);
		case_rrr(unle, _d);
		case_rrf(unle, _d, 64);
		case_rrr(uneq, _d);
		case_rrf(uneq, _d, 64);
		case_rrr(unge, _d);
		case_rrf(unge, _d, 64);
		case_rrr(ungt, _d);
		case_rrf(ungt, _d, 64);
		case_rrr(ltgt, _d);
		case_rrf(ltgt, _d, 64);
		case_rrr(ord, _d);
		case_rrf(ord, _d, 64);
		case_rrr(unord, _d);
		case_rrf(unord, _d, 64);
		case_brr(blt, _d);
		case_brf(blt, _d, 64);
		case_brr(ble, _d);
		case_brf(ble, _d, 64);
		case_brr(beq, _d);
		case_brf(beq, _d, 64);
		case_brr(bge, _d);
		case_brf(bge, _d, 64);
		case_brr(bgt, _d);
		case_brf(bgt, _d, 64);
		case_brr(bne, _d);
		case_brf(bne, _d, 64);
		case_brr(bunlt, _d);
		case_brf(bunlt, _d, 64);
		case_brr(bunle, _d);
		case_brf(bunle, _d, 64);
		case_brr(buneq, _d);
		case_brf(buneq, _d, 64);
		case_brr(bunge, _d);
		case_brf(bunge, _d, 64);
		case_brr(bungt, _d);
		case_brf(bungt, _d, 64);
		case_brr(bltgt, _d);
		case_brf(bltgt, _d, 64);
		case_brr(bord, _d);
		case_brf(bord, _d, 64);
		case_brr(bunord, _d);
		case_brf(bunord, _d, 64);
	    case jit_code_jmpr:
		jit_check_frame();
		jmpr(rn(node->u.w), prev);
		break;
	    case jit_code_jmpi:
		if (node->flag & jit_flag_node) {
		    temp = node->u.n;
		    assert(temp->code == jit_code_label ||
			   temp->code == jit_code_epilog);
		    if (temp->flag & jit_flag_patch)
			jmpi(temp->u.w, prev, 0);
		    else {
			word = _jit->code.length -
			    (_jit->pc.uc - _jit->code.ptr);
			if (can_relative_jump_p(word))
			    word = jmpi(_jit->pc.w, prev, 1);
			else
			    word = jmpi_p(_jit->pc.w, prev);
			patch(word, node);
		    }
		}
		else {
		    jit_check_frame();
		    jmpi(node->u.w, prev, 0);
		}
		break;
	    case jit_code_callr:
		jit_check_frame();
		callr(rn(node->u.w), prev);
		break;
	    case jit_code_calli:
		if (node->flag & jit_flag_node) {
		    temp = node->u.n;
		    assert(temp->code == jit_code_label ||
			   temp->code == jit_code_epilog);
		    if (temp->flag & jit_flag_patch)
			calli(temp->u.w, NULL, 0);
		    else {
			word = _jit->code.length -
			    (_jit->pc.uc - _jit->code.ptr);
			if (jit_mips2_p() && can_relative_jump_p(word))
			    word = calli(_jit->pc.w, prev, 1);
			else
			    word = calli_p(_jit->pc.w);
			patch(word, node);
		    }
		}
		else {
		    jit_check_frame();
		    calli(node->u.w, NULL, 0);
		}
		break;
	    case jit_code_prolog:
		_jitc->function = _jitc->functions.ptr + node->w.w;
		undo.node = node;
		undo.word = _jit->pc.w;
		memcpy(&undo.func, _jitc->function, sizeof(undo.func));
#if DEVEL_DISASSEMBLER
		undo.prevw = prevw;
#endif
		undo.patch_offset = _jitc->patches.offset;
	    restart_function:
		_jitc->again = 0;
		compute_framesize();
		patch_alist(0);
		prolog(node);
		break;
	    case jit_code_epilog:
		assert(_jitc->function == _jitc->functions.ptr + node->w.w);
		if (_jitc->again) {
		    for (temp = undo.node->next;
			 temp != node; temp = temp->next) {
			if (temp->code == jit_code_label ||
			    temp->code == jit_code_epilog)
			    temp->flag &= ~jit_flag_patch;
		    }
		    temp->flag &= ~jit_flag_patch;
		    node = undo.node;
		    _jit->pc.w = undo.word;
		    /* undo.func.self.aoff and undo.func.regset should not
		     * be undone, as they will be further updated, and are
		     * the reason of the undo. */
		    undo.func.self.aoff = _jitc->function->frame +
			_jitc->function->self.aoff;
		    undo.func.need_frame = _jitc->function->need_frame;
		    jit_regset_set(&undo.func.regset, &_jitc->function->regset);
		    /* allocar information also does not need to be undone */
		    undo.func.aoffoff = _jitc->function->aoffoff;
		    undo.func.allocar = _jitc->function->allocar;
		    /* this will be recomputed but undo anyway to have it
		     * better self documented.*/
		    undo.func.need_stack = _jitc->function->need_stack;
		    memcpy(_jitc->function, &undo.func, sizeof(undo.func));
#if DEVEL_DISASSEMBLER
		    prevw = undo.prevw;
#endif
		    _jitc->patches.offset = undo.patch_offset;
		    patch_alist(1);
		    goto restart_function;
		}
		/* remember label is defined */
		node->flag |= jit_flag_patch;
		node->u.w = _jit->pc.w;
		epilog(node);
		_jitc->function = NULL;
		break;
#if !NEW_ABI
	    case jit_code_movr_w_f:
		movr_w_f(rn(node->u.w), rn(node->v.w));
		break;
#endif
	    case jit_code_movr_f_w:
		movr_f_w(rn(node->u.w), rn(node->v.w));
		break;
	    case jit_code_movi_f_w:
		assert(node->flag & jit_flag_data);
		movi_f_w(rn(node->u.w), (jit_float32_t *)node->v.n->u.w);
		break;
#if NEW_ABI
	    case jit_code_movr_d_w:
		movr_d_w(rn(node->u.w), rn(node->v.w));
		break;
	    case jit_code_movi_d_w:
		assert(node->flag & jit_flag_data);
		movi_d_w(rn(node->u.w), (jit_float64_t *)node->v.n->u.w);
		break;
#else
	    case jit_code_movr_ww_d:
		movr_ww_d(rn(node->u.w), rn(node->v.w), rn(node->w.w));
		break;
	    case jit_code_movr_d_ww:
		movr_d_ww(rn(node->u.w), rn(node->v.w), rn(node->w.w));
		break;
	    case jit_code_movi_d_ww:
		assert(node->flag & jit_flag_data);
		movi_d_ww(rn(node->u.w), rn(node->v.w),
			  (jit_float64_t *)node->w.n->u.w);
		break;
#endif
	    case jit_code_va_start:
		vastart(rn(node->u.w));
		break;
	    case jit_code_va_arg:
		vaarg(rn(node->u.w), rn(node->v.w));
		break;
	    case jit_code_va_arg_d:
		vaarg_d(rn(node->u.w), rn(node->v.w));
		break;
	    case jit_code_live:			case jit_code_ellipsis:
	    case jit_code_va_push:
	    case jit_code_allocai:		case jit_code_allocar:
	    case jit_code_arg_c:		case jit_code_arg_s:
	    case jit_code_arg_i:
#  if __WORDSIZE == 64
	    case jit_code_arg_l:
#  endif
	    case jit_code_arg_f:		case jit_code_arg_d:
	    case jit_code_va_end:
	    case jit_code_ret:
	    case jit_code_retr_c:		case jit_code_reti_c:
	    case jit_code_retr_uc:		case jit_code_reti_uc:
	    case jit_code_retr_s:		case jit_code_reti_s:
	    case jit_code_retr_us:		case jit_code_reti_us:
	    case jit_code_retr_i:		case jit_code_reti_i:
#if __WORDSIZE == 64
	    case jit_code_retr_ui:		case jit_code_reti_ui:
	    case jit_code_retr_l:		case jit_code_reti_l:
#endif
	    case jit_code_retr_f:		case jit_code_reti_f:
	    case jit_code_retr_d:		case jit_code_reti_d:
	    case jit_code_getarg_c:		case jit_code_getarg_uc:
	    case jit_code_getarg_s:		case jit_code_getarg_us:
	    case jit_code_getarg_i:
#if __WORDSIZE == 64
	    case jit_code_getarg_ui:		case jit_code_getarg_l:
#endif
	    case jit_code_getarg_f:		case jit_code_getarg_d:
	    case jit_code_putargr_c:		case jit_code_putargi_c:
	    case jit_code_putargr_uc:		case jit_code_putargi_uc:
	    case jit_code_putargr_s:		case jit_code_putargi_s:
	    case jit_code_putargr_us:		case jit_code_putargi_us:
	    case jit_code_putargr_i:		case jit_code_putargi_i:
#if __WORDSIZE == 64
	    case jit_code_putargr_ui:		case jit_code_putargi_ui:
	    case jit_code_putargr_l:		case jit_code_putargi_l:
#endif
	    case jit_code_putargr_f:		case jit_code_putargi_f:
	    case jit_code_putargr_d:		case jit_code_putargi_d:
	    case jit_code_pushargr_c:		case jit_code_pushargi_c:
	    case jit_code_pushargr_uc:		case jit_code_pushargi_uc:
	    case jit_code_pushargr_s:		case jit_code_pushargi_s:
	    case jit_code_pushargr_us:		case jit_code_pushargi_us:
	    case jit_code_pushargr_i:		case jit_code_pushargi_i:
#if __WORDSIZE == 64
	    case jit_code_pushargr_ui:		case jit_code_pushargi_ui:
	    case jit_code_pushargr_l:		case jit_code_pushargi_l:
#endif
	    case jit_code_pushargr_f:		case jit_code_pushargi_f:
	    case jit_code_pushargr_d:		case jit_code_pushargi_d:
	    case jit_code_retval_c:		case jit_code_retval_uc:
	    case jit_code_retval_s:		case jit_code_retval_us:
	    case jit_code_retval_i:
#if __WORDSIZE == 64
	    case jit_code_retval_ui:		case jit_code_retval_l:
#endif
	    case jit_code_retval_f:		case jit_code_retval_d:
	    case jit_code_prepare:
	    case jit_code_finishr:		case jit_code_finishi:
		break;
	    default:
		abort();
	}
	if (jit_carry != _NOREG) {
	    switch (node->code) {
		case jit_code_note:
		case jit_code_addcr:		case jit_code_addci:
		case jit_code_addxr:		case jit_code_addxi:
		case jit_code_subcr:		case jit_code_subci:
		case jit_code_subxr:		case jit_code_subxi:
		    break;
		default:
		    jit_unget_reg(jit_carry);
		    jit_carry = _NOREG;
		    break;
	    }
	}
	jit_regarg_clr(node, value);
	assert(_jitc->regarg == 0 ||
	       (jit_carry != _NOREG && _jitc->regarg == (1 << jit_carry)));
	assert(_jitc->synth == 0);
	/* update register live state */
	jit_reglive(node);

	if (node->code != jit_code_note
	    && node->code != jit_code_name
	    && node->code != jit_code_live)
		prev = node;
    }
#undef case_brf
#undef case_brw
#undef case_brr
#undef case_wrr
#undef case_rrf
#undef case_rrw
#undef case_rrr
#undef case_wr
#undef case_rw
#undef case_rr

    for (offset = 0; offset < _jitc->patches.offset; offset++) {
	node = _jitc->patches.ptr[offset].node;
	word = node->code == jit_code_movi ? node->v.n->u.w : node->u.n->u.w;
	patch_at(_jitc->patches.ptr[offset].inst, word);
    }

    jit_flush(_jit->code.ptr, _jit->pc.uc);

    return (_jit->code.ptr);
}

#define CODE				1
#  include "jit_rewind.c"
#  include "jit_mips-cpu.c"
#  include "jit_mips-fpu.c"
#  include "jit_fallback.c"
#undef CODE

void
jit_flush(void *fptr, void *tptr)
{
#if defined(__linux__)
    jit_word_t		f, t, s;

    s = sysconf(_SC_PAGE_SIZE);
    f = (jit_word_t)fptr & -s;
    t = (((jit_word_t)tptr) + s - 1) & -s;
    _flush_cache((void *)f, t - f, ICACHE);
#endif
}

void
_emit_ldxi(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
{
    ldxi(rn(r0), rn(r1), i0);
}

void
_emit_stxi(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)
{
    stxi(i0, rn(r0), rn(r1));
}

void
_emit_ldxi_d(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
{
    ldxi_d(rn(r0), rn(r1), i0);
}

void
_emit_stxi_d(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)
{
    stxi_d(i0, rn(r0), rn(r1));
}

static void
_compute_framesize(jit_state_t *_jit)
{
    jit_int32_t		reg;
    _jitc->framesize = STACK_SLOT << 1;	/* ra+fp */
    for (reg = 0; reg < jit_size(iregs); reg++)
	if (jit_regset_tstbit(&_jitc->function->regset, iregs[reg]))
	    _jitc->framesize += STACK_SLOT;

    for (reg = 0; reg < jit_size(fregs); reg++)
	if (jit_regset_tstbit(&_jitc->function->regset, fregs[reg]))
	    _jitc->framesize += sizeof(jit_float64_t);

#if NEW_ABI
    /* Space to store variadic arguments */
    if (_jitc->function->self.call & jit_call_varargs)
	_jitc->framesize += (NUM_WORD_ARGS - _jitc->function->vagp) * STACK_SLOT;
#endif

    /* Make sure functions called have a 16 byte aligned stack */
    _jitc->framesize = (_jitc->framesize + 15) & -16;
}

static void
_patch(jit_state_t *_jit, jit_word_t instr, jit_node_t *node)
{
    jit_int32_t		 flag;

    assert(node->flag & jit_flag_node);
    if (node->code == jit_code_movi)
	flag = node->v.n->flag;
    else
	flag = node->u.n->flag;
    assert(!(flag & jit_flag_patch));
    if (_jitc->patches.offset >= _jitc->patches.length) {
	jit_realloc((jit_pointer_t *)&_jitc->patches.ptr,
		    _jitc->patches.length * sizeof(jit_patch_t),
		    (_jitc->patches.length + 1024) * sizeof(jit_patch_t));
	_jitc->patches.length += 1024;
    }
    _jitc->patches.ptr[_jitc->patches.offset].inst = instr;
    _jitc->patches.ptr[_jitc->patches.offset].node = node;
    ++_jitc->patches.offset;
}