ia32_intrinsics.c 21.4 KB
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/**
 * This file implements the mapping of 64Bit intrinsic functions to
 * code or library calls.
 * @author Michael Beck
 * $Id$
 */

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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#include "irgmod.h"
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#include "irop.h"
#include "irnode_t.h"
#include "ircons.h"
#include "irprog_t.h"
#include "lower_intrinsics.h"
#include "lower_dw.h"
#include "mangle.h"
#include "array.h"

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#include "ia32_new_nodes.h"
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#include "bearch_ia32_t.h"
#include "gen_ia32_regalloc_if.h"
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/** The array of all intrinsics that must be mapped. */
static i_record *intrinsics;

/** An array to cache all entities */
static entity *i_ents[iro_MaxOpcode];

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/*
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 * Maps all intrinsic calls that the backend support
 * and map all instructions the backend did not support
 * to runtime calls.
 */
void ia32_handle_intrinsics(void) {
	if (intrinsics && ARR_LEN(intrinsics) > 0)
		lower_intrinsics(intrinsics, ARR_LEN(intrinsics));
}

#define BINOP_Left_Low   0
#define BINOP_Left_High  1
#define BINOP_Right_Low  2
#define BINOP_Right_High 3

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static void resolve_call(ir_node *call, ir_node *l_res, ir_node *h_res, ir_graph *irg, ir_node *block) {
	ir_node *res, *in[2];
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	in[0] = l_res;
	in[1] = h_res;
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	res = new_r_Tuple(irg, block, h_res == NULL ? 1 : 2, in);
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	turn_into_tuple(call, pn_Call_max);
	set_Tuple_pred(call, pn_Call_M_regular,        get_irg_no_mem(irg));
	set_Tuple_pred(call, pn_Call_X_except,         get_irg_bad(irg));
	set_Tuple_pred(call, pn_Call_T_result,         res);
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	set_Tuple_pred(call, pn_Call_M_except,         get_irg_no_mem(irg));
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	set_Tuple_pred(call, pn_Call_P_value_res_base, get_irg_bad(irg));
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}

/**
 * Map an Add (a_l, a_h, b_l, b_h)
 */
static int map_Add(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *b_l        = params[BINOP_Right_Low];
	ir_node  *b_h        = params[BINOP_Right_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
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	ir_node  *l_res, *h_res, *add;
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	/* l_res = a_l + b_l */
	/* h_res = a_h + b_h + carry */
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	add   = new_rd_ia32_Add64Bit(dbg, irg, block, a_l, a_h, b_l, b_h);
	l_res = new_r_Proj(irg, block, add, l_res_mode, pn_ia32_Add64Bit_low_res);
	h_res = new_r_Proj(irg, block, add, h_res_mode, pn_ia32_Add64Bit_high_res);
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	resolve_call(call, l_res, h_res, irg, block);
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	return 1;
}

/**
 * Map a Sub (a_l, a_h, b_l, b_h)
 */
static int map_Sub(ir_node *call, void *ctx) {
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	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *b_l        = params[BINOP_Right_Low];
	ir_node  *b_h        = params[BINOP_Right_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
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	ir_node  *l_res, *h_res, *res;
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	/* l_res = a_l - b_l */
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	/* h_res = a_h - b_h - carry */
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	res   = new_rd_ia32_Sub64Bit(dbg, irg, block, a_l, a_h, b_l, b_h);
	l_res = new_r_Proj(irg, block, res, l_res_mode, pn_ia32_Sub64Bit_low_res);
	h_res = new_r_Proj(irg, block, res, h_res_mode, pn_ia32_Sub64Bit_high_res);
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	resolve_call(call, l_res, h_res, irg, block);
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	return 1;
}

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/**
 * Map a Shl (a_l, a_h, count)
 */
static int map_Shl(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *cnt        = params[BINOP_Right_Low];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
	ir_node  *l_res, *h_res;

	/* h_res = SHLD a_h, a_l, cnt */
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	h_res = new_rd_ia32_l_ShlD(dbg, irg, block, a_h, a_l, cnt, l_res_mode);
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	/* l_res = SHL a_l, cnt */
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	l_res = new_rd_ia32_l_Shl(dbg, irg, block, a_l, cnt, h_res_mode);
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	add_irn_dep(l_res, h_res);
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	resolve_call(call, l_res, h_res, irg, block);
	return 1;
}

/**
 * Map a Shr (a_l, a_h, count)
 */
static int map_Shr(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *cnt        = params[BINOP_Right_Low];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
	ir_node  *l_res, *h_res;

	/* l_res = SHRD a_l, a_h, cnt */
	l_res = new_rd_ia32_l_ShrD(dbg, irg, block, a_l, a_h, cnt, l_res_mode);

	/* h_res = SHR a_h, cnt */
	h_res = new_rd_ia32_l_Shr(dbg, irg, block, a_h, cnt, h_res_mode);
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	add_irn_dep(h_res, l_res);
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	resolve_call(call, l_res, h_res, irg, block);
	return 1;
}

/**
 * Map a Shrs (a_l, a_h, count)
 */
static int map_Shrs(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *cnt        = params[BINOP_Right_Low];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
	ir_node  *l_res, *h_res;

	/* l_res = SHRD a_l, a_h, cnt */
	l_res = new_rd_ia32_l_ShrD(dbg, irg, block, a_l, a_h, cnt, l_res_mode);

	/* h_res = SAR a_h, cnt */
	h_res = new_rd_ia32_l_Shrs(dbg, irg, block, a_h, cnt, h_res_mode);
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	add_irn_dep(h_res, l_res);
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	resolve_call(call, l_res, h_res, irg, block);
	return 1;
}

/**
 * Map a Mul (a_l, a_h, b_l, b_h)
 */
static int map_Mul(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *b_l        = params[BINOP_Right_Low];
	ir_node  *b_h        = params[BINOP_Right_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
	ir_node  *l_res, *h_res, *mul, *pEDX, *add;

	/*
		EDX:EAX = a_l * b_l
		l_res   = EAX

		t1 = b_l * a_h
		t2 = t1 + EDX
		t3 = a_l * b_h
		h_res = t2 + t3
	*/
	mul   = new_rd_ia32_l_MulS(dbg, irg, block, a_l, b_l);
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	set_ia32_res_mode(mul, l_res_mode);
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	pEDX  = new_rd_Proj(dbg, irg, block, mul, l_res_mode, pn_ia32_l_MulS_EDX);
	l_res = new_rd_Proj(dbg, irg, block, mul, l_res_mode, pn_ia32_l_MulS_EAX);

	mul   = new_rd_ia32_l_Mul(dbg, irg, block, a_h, b_l, h_res_mode);
	add   = new_rd_ia32_l_Add(dbg, irg, block, mul, pEDX, h_res_mode);
	mul   = new_rd_ia32_l_Mul(dbg, irg, block, a_l, b_h, h_res_mode);
	h_res = new_rd_ia32_l_Add(dbg, irg, block, add, mul, h_res_mode);

	resolve_call(call, l_res, h_res, irg, block);

	return 1;
}

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/**
 * Map a Minus (a_l, a_h)
 */
static int map_Minus(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
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	ir_node  *l_res, *h_res, *cnst, *res;
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	/* too bad: we need 0 in a register here */
	cnst  = new_Const_long(h_res_mode, 0);
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	/* l_res = 0 - a_l */
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	/* h_res = 0 - a_h - carry */

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	res   = new_rd_ia32_Minus64Bit(dbg, irg, block, cnst, a_l, a_h);
	l_res = new_r_Proj(irg, block, res, l_res_mode, pn_ia32_Minus64Bit_low_res);
	h_res = new_r_Proj(irg, block, res, h_res_mode, pn_ia32_Minus64Bit_high_res);
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	resolve_call(call, l_res, h_res, irg, block);

	return 1;
}

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/**
 * Map a Abs (a_l, a_h)
 */
static int map_Abs(ir_node *call, void *ctx) {
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
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	ir_node  *l_res, *h_res, *sign, *sub_l, *sub_h, *res;
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	/*
		Code inspired by gcc output :) (although gcc doubles the
		operation for t1 as t2 and uses t1 for operations with low part
		and t2 for operations with high part which is actually unnecessary
		because t1 and t2 represent the same value)

		t1    = SHRS a_h, 31
		t2    = a_l ^ t1
		t3    = a_h ^ t1
		l_res = t2 - t1
		h_res = t3 - t1 - carry

	*/

	sign  = new_rd_ia32_l_Shrs(dbg, irg, block, a_h, new_Const_long(h_res_mode, 31), h_res_mode);
	sub_l = new_rd_ia32_l_Eor(dbg, irg, block, a_l, sign, l_res_mode);
	sub_h = new_rd_ia32_l_Eor(dbg, irg, block, a_h, sign, h_res_mode);
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	res   = new_rd_ia32_Sub64Bit(dbg, irg, block, sub_l, sub_h, sign, sign);
	l_res = new_r_Proj(irg, block, res, l_res_mode, pn_ia32_Sub64Bit_low_res);
	h_res = new_r_Proj(irg, block, res, h_res_mode, pn_ia32_Sub64Bit_high_res);
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	resolve_call(call, l_res, h_res, irg, block);

	return 1;
}

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typedef enum {
	IA32_INTRINSIC_DIV,
	IA32_INTRINSIC_MOD,
} ia32_intrinsic_divmod_t;

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/**
 * Maps a Div/Mod (a_l, a_h, b_l, b_h)
 */
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static int DivMod_mapper(ir_node *call, void *ctx, ia32_intrinsic_divmod_t dmtp) {
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	ia32_intrinsic_env_t *env = ctx;
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	ir_node  *a_l        = params[BINOP_Left_Low];
	ir_node  *a_h        = params[BINOP_Left_High];
	ir_node  *b_l        = params[BINOP_Right_Low];
	ir_node  *b_h        = params[BINOP_Right_High];
	ir_mode  *l_res_mode = get_type_mode(get_method_res_type(method, 0));
	ir_mode  *h_res_mode = get_type_mode(get_method_res_type(method, 1));
	int      mode_bytes  = get_mode_size_bytes(ia32_reg_classes[CLASS_ia32_gp].mode);
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	entity   *ent_a      = env->irg == irg ? env->ll_div_op1 : NULL;
	entity   *ent_b      = env->irg == irg ? env->ll_div_op2 : NULL;
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	ir_node  *l_res, *h_res, *frame;
	ir_node  *store_l, *store_h;
	ir_node  *op_mem[2], *mem, *fa_mem, *fb_mem;
	ir_node  *fa, *fb, *fres;

	/* allocate memory on frame to store args */

	if (! ent_a) {
		ent_a = env->ll_div_op1 =
			frame_alloc_area(get_irg_frame_type(irg), 2 * mode_bytes, 16, 0);
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		env->irg = irg;
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	}

	if (! ent_b) {
		ent_b = env->ll_div_op2 =
			frame_alloc_area(get_irg_frame_type(irg), 2 * mode_bytes, 16, 0);
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		env->irg = irg;
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	}

	frame = get_irg_frame(irg);

	/* store first arg */
	store_l   = new_rd_ia32_l_Store(dbg, irg, block, frame, a_l, get_irg_no_mem(irg));
	set_ia32_frame_ent(store_l, ent_a);
	set_ia32_use_frame(store_l);
	set_ia32_ls_mode(store_l, get_irn_mode(a_l));
	op_mem[0] = new_r_Proj(irg, block, store_l, mode_M, pn_ia32_l_Store_M);

	store_h   = new_rd_ia32_l_Store(dbg, irg, block, frame, a_h, get_irg_no_mem(irg));
	set_ia32_frame_ent(store_h, ent_a);
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	add_ia32_am_offs_int(store_h, mode_bytes);
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	set_ia32_use_frame(store_h);
	set_ia32_ls_mode(store_h, get_irn_mode(a_h));
	op_mem[1] = new_r_Proj(irg, block, store_h, mode_M, pn_ia32_l_Store_M);

	mem = new_r_Sync(irg, block, 2, op_mem);

	/* load first arg into FPU */
	fa = new_rd_ia32_l_vfild(dbg, irg, block, frame, mem);
	set_ia32_frame_ent(fa, ent_a);
	set_ia32_use_frame(fa);
	set_ia32_ls_mode(fa, mode_D);
	fa_mem = new_r_Proj(irg, block, fa, mode_M, pn_ia32_l_vfild_M);
	fa     = new_r_Proj(irg, block, fa, mode_D, pn_ia32_l_vfild_res);

	/* store second arg */
	store_l   = new_rd_ia32_l_Store(dbg, irg, block, frame, b_l, get_irg_no_mem(irg));
	set_ia32_frame_ent(store_l, ent_b);
	set_ia32_use_frame(store_l);
	set_ia32_ls_mode(store_l, get_irn_mode(b_l));
	op_mem[0] = new_r_Proj(irg, block, store_l, mode_M, pn_ia32_l_Store_M);

	store_h   = new_rd_ia32_l_Store(dbg, irg, block, frame, b_h, get_irg_no_mem(irg));
	set_ia32_frame_ent(store_h, ent_b);
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	add_ia32_am_offs_int(store_h, mode_bytes);
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	set_ia32_use_frame(store_h);
	set_ia32_ls_mode(store_h, get_irn_mode(b_h));
	op_mem[1] = new_r_Proj(irg, block, store_h, mode_M, pn_ia32_l_Store_M);

	mem = new_r_Sync(irg, block, 2, op_mem);

	/* load second arg into FPU */
	fb = new_rd_ia32_l_vfild(dbg, irg, block, frame, mem);
	set_ia32_frame_ent(fb, ent_b);
	set_ia32_use_frame(fb);
	set_ia32_ls_mode(fb, mode_D);
	fb_mem = new_r_Proj(irg, block, fb, mode_M, pn_ia32_l_vfild_M);
	fb     = new_r_Proj(irg, block, fb, mode_D, pn_ia32_l_vfild_res);

	op_mem[0] = fa_mem;
	op_mem[1] = fb_mem;

	mem = new_r_Sync(irg, block, 2, op_mem);

	/* perform division */
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	switch (dmtp) {
		case IA32_INTRINSIC_DIV:
			fres = new_rd_ia32_l_vfdiv(dbg, irg, block, fa, fb, mode_D);
			break;
		case IA32_INTRINSIC_MOD:
			fres = new_rd_ia32_l_vfprem(dbg, irg, block, fa, fb, mode_D);
			break;
		default:
			assert(0);
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	}

	/* store back result, we use ent_a here */
	fres = new_rd_ia32_l_vfist(dbg, irg, block, frame, fres, mem);
	set_ia32_frame_ent(fres, ent_a);
	set_ia32_use_frame(fres);
	set_ia32_ls_mode(fres, mode_D);
	mem = new_r_Proj(irg, block, fres, mode_M, pn_ia32_l_vfist_M);

	/* load low part of the result */
	l_res = new_rd_ia32_l_Load(dbg, irg, block, frame, mem);
	set_ia32_frame_ent(l_res, ent_a);
	set_ia32_use_frame(l_res);
	set_ia32_ls_mode(l_res, l_res_mode);
	l_res = new_r_Proj(irg, block, l_res, l_res_mode, pn_ia32_l_Load_res);

	/* load hight part of the result */
	h_res = new_rd_ia32_l_Load(dbg, irg, block, frame, mem);
	set_ia32_frame_ent(h_res, ent_a);
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	add_ia32_am_offs_int(h_res, mode_bytes);
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	set_ia32_use_frame(h_res);
	set_ia32_ls_mode(h_res, h_res_mode);
	h_res = new_r_Proj(irg, block, h_res, h_res_mode, pn_ia32_l_Load_res);

	/* lower the call */
	resolve_call(call, l_res, h_res, irg, block);

	return 1;
}

static int map_Div(ir_node *call, void *ctx) {
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	return DivMod_mapper(call, ctx, IA32_INTRINSIC_DIV);
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}

static int map_Mod(ir_node *call, void *ctx) {
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	return DivMod_mapper(call, ctx, IA32_INTRINSIC_MOD);
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}

/**
 * Maps a Conv (a_l, a_h)
 */
static int map_Conv(ir_node *call, void *ctx) {
	ia32_intrinsic_env_t *env = ctx;
	ir_graph *irg        = current_ir_graph;
	dbg_info *dbg        = get_irn_dbg_info(call);
	ir_node  *block      = get_nodes_block(call);
	ir_node  **params    = get_Call_param_arr(call);
	ir_type  *method     = get_Call_type(call);
	int      n           = get_Call_n_params(call);
	int      gp_bytes    = get_mode_size_bytes(ia32_reg_classes[CLASS_ia32_gp].mode);
	entity   *ent;
	ir_node  *l_res, *h_res, *frame, *fres;
	ir_node  *store_l, *store_h;
	ir_node  *op_mem[2], *mem;

	if (n == 1) {
		/* We have a Conv float -> long long here */
		ir_node *a_f        = params[0];
		ir_mode *l_res_mode = get_type_mode(get_method_res_type(method, 0));
		ir_mode *h_res_mode = get_type_mode(get_method_res_type(method, 1));

		assert(mode_is_float(get_irn_mode(a_f)) && "unexpected Conv call");

		/* allocate memory on frame to store args */
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		ent = env->irg == irg ? env->d_ll_conv : NULL;
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		if (! ent) {
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			ent      = env->d_ll_conv = frame_alloc_area(get_irg_frame_type(irg), 2 * gp_bytes, 16, 0);
			env->irg = irg;
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		}

		/* Store arg */
		frame = get_irg_frame(irg);

		/*
			Now we create a node to move the value from a XMM register into
			x87 FPU because it is unknown here, which FPU is used.
			This node is killed in transformation phase when not needed.
			Otherwise it is split up into a movsd + fld
		*/
		a_f = new_rd_ia32_l_SSEtoX87(dbg, irg, block, frame, a_f, get_irg_no_mem(irg), mode_D);
		set_ia32_frame_ent(a_f, ent);
		set_ia32_use_frame(a_f);
		set_ia32_ls_mode(a_f, mode_D);

		/* store from FPU as Int */
		a_f = new_rd_ia32_l_vfist(dbg, irg, block, frame, a_f, get_irg_no_mem(irg));
		set_ia32_frame_ent(a_f, ent);
		set_ia32_use_frame(a_f);
		set_ia32_ls_mode(a_f, mode_D);
		mem = new_r_Proj(irg, block, a_f, mode_M, pn_ia32_l_vfist_M);

		/* load low part of the result */
		l_res = new_rd_ia32_l_Load(dbg, irg, block, frame, mem);
		set_ia32_frame_ent(l_res, ent);
		set_ia32_use_frame(l_res);
		set_ia32_ls_mode(l_res, l_res_mode);
		l_res = new_r_Proj(irg, block, l_res, l_res_mode, pn_ia32_l_Load_res);

		/* load hight part of the result */
		h_res = new_rd_ia32_l_Load(dbg, irg, block, frame, mem);
		set_ia32_frame_ent(h_res, ent);
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		add_ia32_am_offs_int(h_res, gp_bytes);
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		set_ia32_use_frame(h_res);
		set_ia32_ls_mode(h_res, h_res_mode);
		h_res = new_r_Proj(irg, block, h_res, h_res_mode, pn_ia32_l_Load_res);

		/* lower the call */
		resolve_call(call, l_res, h_res, irg, block);
	}
	else if (n == 2) {
		/* We have a Conv long long -> float here */
		ir_node *a_l       = params[BINOP_Left_Low];
		ir_node *a_h       = params[BINOP_Left_High];
		ir_mode *mode_a_l  = get_irn_mode(a_l);
		ir_mode *mode_a_h  = get_irn_mode(a_h);
		ir_mode *fres_mode = get_type_mode(get_method_res_type(method, 0));

		assert(! mode_is_float(mode_a_l) && ! mode_is_float(mode_a_h) && "unexpected Conv call");

		/* allocate memory on frame to store args */
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		ent = env->irg == irg ? env->ll_d_conv : NULL;
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		if (! ent) {
			ent = env->ll_d_conv = frame_alloc_area(get_irg_frame_type(irg), 2 * gp_bytes, 16, 0);
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			env->irg = irg;
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		}

		/* Store arg */
		frame = get_irg_frame(irg);

		/* store first arg (low part) */
		store_l   = new_rd_ia32_l_Store(dbg, irg, block, frame, a_l, get_irg_no_mem(irg));
		set_ia32_frame_ent(store_l, ent);
		set_ia32_use_frame(store_l);
		set_ia32_ls_mode(store_l, get_irn_mode(a_l));
		op_mem[0] = new_r_Proj(irg, block, store_l, mode_M, pn_ia32_l_Store_M);

		/* store second arg (high part) */
		store_h   = new_rd_ia32_l_Store(dbg, irg, block, frame, a_h, get_irg_no_mem(irg));
		set_ia32_frame_ent(store_h, ent);
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		add_ia32_am_offs_int(store_h, gp_bytes);
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		set_ia32_use_frame(store_h);
		set_ia32_ls_mode(store_h, get_irn_mode(a_h));
		op_mem[1] = new_r_Proj(irg, block, store_h, mode_M, pn_ia32_l_Store_M);

		mem = new_r_Sync(irg, block, 2, op_mem);

		/* Load arg into x87 FPU (implicit convert) */
		fres = new_rd_ia32_l_vfild(dbg, irg, block, frame, mem);
		set_ia32_frame_ent(fres, ent);
		set_ia32_use_frame(fres);
		set_ia32_ls_mode(fres, mode_D);
		mem  = new_r_Proj(irg, block, fres, mode_M, pn_ia32_l_vfild_M);
		fres = new_r_Proj(irg, block, fres, fres_mode, pn_ia32_l_vfild_res);

		/*
			Now we create a node to move the loaded value into a XMM
			register because it is unknown here, which FPU is used.
			This node is killed in transformation phase when not needed.
			Otherwise it is split up into a fst + movsd
		*/
		fres = new_rd_ia32_l_X87toSSE(dbg, irg, block, frame, fres, mem, fres_mode);
		set_ia32_frame_ent(fres, ent);
		set_ia32_use_frame(fres);
		set_ia32_ls_mode(fres, fres_mode);

		/* lower the call */
		resolve_call(call, fres, NULL, irg, block);
	}
	else {
		assert(0 && "unexpected Conv call");
	}

	return 1;
}

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/* Ia32 implementation of intrinsic mapping. */
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entity *ia32_create_intrinsic_fkt(ir_type *method, const ir_op *op,
                                  const ir_mode *imode, const ir_mode *omode,
                                  void *context)
{
	i_record      elt;
	entity        **ent = NULL;
	i_mapper_func mapper;

	if (! intrinsics)
		intrinsics = NEW_ARR_F(i_record, 0);

	switch (get_op_code(op)) {
	case iro_Add:
		ent    = &i_ents[iro_Add];
		mapper = map_Add;
		break;
	case iro_Sub:
		ent    = &i_ents[iro_Sub];
		mapper = map_Sub;
		break;
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	case iro_Shl:
		ent    = &i_ents[iro_Shl];
		mapper = map_Shl;
		break;
	case iro_Shr:
		ent    = &i_ents[iro_Shr];
		mapper = map_Shr;
		break;
	case iro_Shrs:
		ent    = &i_ents[iro_Shrs];
		mapper = map_Shrs;
		break;
	case iro_Mul:
		ent    = &i_ents[iro_Mul];
		mapper = map_Mul;
		break;
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	case iro_Minus:
		ent    = &i_ents[iro_Minus];
		mapper = map_Minus;
		break;
	case iro_Abs:
		ent    = &i_ents[iro_Abs];
		mapper = map_Abs;
		break;
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	case iro_Div:
		ent    = &i_ents[iro_Div];
		mapper = map_Div;
		break;
	case iro_Mod:
		ent    = &i_ents[iro_Mod];
		mapper = map_Mod;
		break;
	case iro_Conv:
		ent    = &i_ents[iro_Conv];
		mapper = map_Conv;
		break;
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	default:
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		fprintf(stderr, "FIXME: unhandled op for ia32 intrinsic function %s\n", get_id_str(op->name));
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		return def_create_intrinsic_fkt(method, op, imode, omode, context);
	}

	if (ent && ! *ent) {
#define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)

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		ident *id = mangle(IDENT("L"), get_op_ident(op));
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		*ent = new_entity(get_glob_type(), id, method);
	}

	elt.i_call.kind     = INTRINSIC_CALL;
	elt.i_call.i_ent    = *ent;
	elt.i_call.i_mapper = mapper;
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	elt.i_call.ctx      = context;
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	elt.i_call.link     = NULL;

	ARR_APP1(i_record, intrinsics, elt);
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	return *ent;
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}