X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fia32%2Fbearch_ia32.c;h=269901cf73883a5ebd98c5fcc7feda566185650e;hb=927eac90f1c28092a5406def6540bb9fae752360;hp=8a0cab03e63b67ebadc2a9be7d03aeb45770fafe;hpb=f17bb2ace6e0bc082b5a5396a1d3cf8ac457e589;p=libfirm

diff --git a/ir/be/ia32/bearch_ia32.c b/ir/be/ia32/bearch_ia32.c
index 8a0cab03e..269901cf7 100644
--- a/ir/be/ia32/bearch_ia32.c
+++ b/ir/be/ia32/bearch_ia32.c
@@ -1,13 +1,26 @@
+/**
+ * This is the main ia32 firm backend driver.
+ * @author Christian Wuerdig
+ * $Id$
+ */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#ifdef _WIN32
+#ifdef HAVE_MALLOC_H
 #include <malloc.h>
-#else
+#endif
+
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
 #endif
 
+#ifdef WITH_LIBCORE
+#include <libcore/lc_opts.h>
+#include <libcore/lc_opts_enum.h>
+#endif /* WITH_LIBCORE */
+
 #include "pseudo_irg.h"
 #include "irgwalk.h"
 #include "irprog.h"
@@ -15,8 +28,9 @@
 #include "iredges_t.h"
 #include "ircons.h"
 #include "irgmod.h"
-
-#include "bitset.h"
+#include "irgopt.h"
+#include "irbitset.h"
+#include "pdeq.h"
 #include "debug.h"
 
 #include "../beabi.h"                 /* the general register allocator interface */
@@ -33,6 +47,10 @@
 #include "ia32_emitter.h"
 #include "ia32_map_regs.h"
 #include "ia32_optimize.h"
+#include "ia32_x87.h"
+#include "ia32_dbg_stat.h"
+#include "ia32_finish.h"
+#include "ia32_util.h"
 
 #define DEBUG_MODULE "firm.be.ia32.isa"
 
@@ -42,12 +60,15 @@ static set *cur_reg_set = NULL;
 #undef is_Start
 #define is_Start(irn) (get_irn_opcode(irn) == iro_Start)
 
+/* Creates the unique per irg GP NoReg node. */
 ir_node *ia32_new_NoReg_gp(ia32_code_gen_t *cg) {
-	return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_gp_regs[REG_XXX]);
+	return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_gp_regs[REG_GP_NOREG]);
 }
 
+/* Creates the unique per irg FP NoReg node. */
 ir_node *ia32_new_NoReg_fp(ia32_code_gen_t *cg) {
-	return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_fp_regs[REG_XXXX]);
+	return be_abi_get_callee_save_irn(cg->birg->abi,
+		USE_SSE2(cg) ? &ia32_xmm_regs[REG_XMM_NOREG] : &ia32_vfp_regs[REG_VFP_NOREG]);
 }
 
 /**************************************************
@@ -67,25 +88,30 @@ static ir_node *my_skip_proj(const ir_node *n) {
 	return (ir_node *)n;
 }
 
+
 /**
  * Return register requirements for an ia32 node.
  * If the node returns a tuple (mode_T) then the proj's
  * will be asked for this information.
  */
 static const arch_register_req_t *ia32_get_irn_reg_req(const void *self, arch_register_req_t *req, const ir_node *irn, int pos) {
+	const ia32_irn_ops_t      *ops = self;
 	const ia32_register_req_t *irn_req;
 	long                       node_pos = pos == -1 ? 0 : pos;
-	ir_mode                   *mode     = get_irn_mode(irn);
-	firm_dbg_module_t         *mod      = firm_dbg_register(DEBUG_MODULE);
-	const ia32_irn_ops_t      *ops      = self;
+	ir_mode                   *mode     = is_Block(irn) ? NULL : get_irn_mode(irn);
+	FIRM_DBG_REGISTER(firm_dbg_module_t *mod, DEBUG_MODULE);
 
-	if (mode == mode_T || mode == mode_M) {
-		DBG((mod, LEVEL_1, "ignoring mode_T, mode_M node %+F\n", irn));
+	if (is_Block(irn) || mode == mode_M || mode == mode_X) {
+		DBG((mod, LEVEL_1, "ignoring Block, mode_M, mode_X node %+F\n", irn));
 		return NULL;
 	}
 
-	DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
+	if (mode == mode_T && pos < 0) {
+		DBG((mod, LEVEL_1, "ignoring request OUT requirements for node %+F\n", irn));
+		return NULL;
+	}
 
+	DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
 
 	if (is_Proj(irn)) {
 		if (pos == -1) {
@@ -123,19 +149,23 @@ static const arch_register_req_t *ia32_get_irn_reg_req(const void *self, arch_re
 		}
 	}
 	else {
-		/* treat Phi like Const with default requirements */
-		if (is_Phi(irn)) {
-			DB((mod, LEVEL_1, "returning standard reqs for %+F\n", irn));
-			if (mode_is_float(mode))
-				memcpy(req, &(ia32_default_req_ia32_fp.req), sizeof(*req));
+		/* treat Unknowns like Const with default requirements */
+		if (is_Unknown(irn)) {
+			DB((mod, LEVEL_1, "returning UKNWN reqs for %+F\n", irn));
+			if (mode_is_float(mode)) {
+				if (USE_SSE2(ops->cg))
+					memcpy(req, &(ia32_default_req_ia32_xmm_xmm_UKNWN), sizeof(*req));
+				else
+					memcpy(req, &(ia32_default_req_ia32_vfp_vfp_UKNWN), sizeof(*req));
+			}
 			else if (mode_is_int(mode) || mode_is_reference(mode))
-				memcpy(req, &(ia32_default_req_ia32_gp.req), sizeof(*req));
+				memcpy(req, &(ia32_default_req_ia32_gp_gp_UKNWN), sizeof(*req));
 			else if (mode == mode_T || mode == mode_M) {
-				DBG((mod, LEVEL_1, "ignoring Phi node %+F\n", irn));
+				DBG((mod, LEVEL_1, "ignoring Unknown node %+F\n", irn));
 				return NULL;
 			}
 			else
-				assert(0 && "unsupported Phi-Mode");
+				assert(0 && "unsupported Unknown-Mode");
 		}
 		else {
 			DB((mod, LEVEL_1, "returning NULL for %+F (not ia32)\n", irn));
@@ -147,7 +177,14 @@ static const arch_register_req_t *ia32_get_irn_reg_req(const void *self, arch_re
 }
 
 static void ia32_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg) {
-	int pos = 0;
+	int                   pos = 0;
+	const ia32_irn_ops_t *ops = self;
+
+	if (get_irn_mode(irn) == mode_X) {
+		return;
+	}
+
+	DBG((ops->cg->mod, LEVEL_1, "ia32 assigned register %s to node %+F\n", reg->name, irn));
 
 	if (is_Proj(irn)) {
 		pos = ia32_translate_proj_pos(irn);
@@ -170,6 +207,11 @@ static const arch_register_t *ia32_get_irn_reg(const void *self, const ir_node *
 	const arch_register_t *reg = NULL;
 
 	if (is_Proj(irn)) {
+
+		if (get_irn_mode(irn) == mode_X) {
+			return NULL;
+		}
+
 		pos = ia32_translate_proj_pos(irn);
 		irn = my_skip_proj(irn);
 	}
@@ -190,6 +232,12 @@ static arch_irn_class_t ia32_classify(const void *self, const ir_node *irn) {
 	irn = my_skip_proj(irn);
 	if (is_cfop(irn))
 		return arch_irn_class_branch;
+	else if (is_ia32_Cnst(irn))
+		return arch_irn_class_const;
+	else if (is_ia32_Ld(irn))
+		return arch_irn_class_load;
+	else if (is_ia32_St(irn) || is_ia32_Store8Bit(irn))
+		return arch_irn_class_store;
 	else if (is_ia32_irn(irn))
 		return arch_irn_class_normal;
 	else
@@ -201,6 +249,8 @@ static arch_irn_flags_t ia32_get_flags(const void *self, const ir_node *irn) {
 	if (is_ia32_irn(irn))
 		return get_ia32_flags(irn);
 	else {
+		if (is_Unknown(irn))
+			return arch_irn_flags_ignore;
 		return 0;
 	}
 }
@@ -213,17 +263,456 @@ static void ia32_set_stack_bias(const void *self, ir_node *irn, int bias) {
 	char buf[64];
 	const ia32_irn_ops_t *ops = self;
 
-	if (is_ia32_use_frame(irn)) {
+	if (get_ia32_frame_ent(irn)) {
 		ia32_am_flavour_t am_flav = get_ia32_am_flavour(irn);
 
 		DBG((ops->cg->mod, LEVEL_1, "stack biased %+F with %d\n", irn, bias));
 		snprintf(buf, sizeof(buf), "%d", bias);
-		add_ia32_am_offs(irn, buf);
-		am_flav |= ia32_O;
-		set_ia32_am_flavour(irn, am_flav);
+
+		if (get_ia32_op_type(irn) == ia32_Normal) {
+			set_ia32_cnst(irn, buf);
+		}
+		else {
+			add_ia32_am_offs(irn, buf);
+			am_flav |= ia32_O;
+			set_ia32_am_flavour(irn, am_flav);
+		}
+	}
+}
+
+typedef struct {
+	be_abi_call_flags_bits_t flags;
+	const arch_isa_t *isa;
+	const arch_env_t *aenv;
+	ir_graph *irg;
+} ia32_abi_env_t;
+
+static void *ia32_abi_init(const be_abi_call_t *call, const arch_env_t *aenv, ir_graph *irg)
+{
+	ia32_abi_env_t *env    = xmalloc(sizeof(env[0]));
+	be_abi_call_flags_t fl = be_abi_call_get_flags(call);
+	env->flags = fl.bits;
+	env->irg   = irg;
+	env->aenv  = aenv;
+	env->isa   = aenv->isa;
+	return env;
+}
+
+/**
+ * Put all registers which are saved by the prologue/epilogue in a set.
+ *
+ * @param self  The callback object.
+ * @param s     The result set.
+ */
+static void ia32_abi_dont_save_regs(void *self, pset *s)
+{
+	ia32_abi_env_t *env = self;
+	if(env->flags.try_omit_fp)
+		pset_insert_ptr(s, env->isa->bp);
+}
+
+/**
+ * Generate the routine prologue.
+ *
+ * @param self    The callback object.
+ * @param mem     A pointer to the mem node. Update this if you define new memory.
+ * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
+ *
+ * @return        The register which shall be used as a stack frame base.
+ *
+ * All nodes which define registers in @p reg_map must keep @p reg_map current.
+ */
+static const arch_register_t *ia32_abi_prologue(void *self, ir_node **mem, pmap *reg_map)
+{
+	ia32_abi_env_t *env              = self;
+
+	if (!env->flags.try_omit_fp) {
+		ir_node *bl          = get_irg_start_block(env->irg);
+		ir_node *curr_sp     = be_abi_reg_map_get(reg_map, env->isa->sp);
+		ir_node *curr_bp     = be_abi_reg_map_get(reg_map, env->isa->bp);
+		ir_node *push;
+
+		/* push ebp */
+		push    = new_rd_ia32_Push(NULL, env->irg, bl, curr_sp, curr_bp, *mem);
+		curr_sp = new_r_Proj(env->irg, bl, push, get_irn_mode(curr_sp), pn_ia32_Push_stack);
+		*mem    = new_r_Proj(env->irg, bl, push, mode_M, pn_ia32_Push_M);
+
+		/* the push must have SP out register */
+		arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
+		set_ia32_flags(push, arch_irn_flags_ignore);
+
+		/* move esp to ebp */
+		curr_bp  = be_new_Copy(env->isa->bp->reg_class, env->irg, bl, curr_sp);
+		be_set_constr_single_reg(curr_bp, BE_OUT_POS(0), env->isa->bp);
+		arch_set_irn_register(env->aenv, curr_bp, env->isa->bp);
+		be_node_set_flags(curr_bp, BE_OUT_POS(0), arch_irn_flags_ignore);
+
+		/* beware: the copy must be done before any other sp use */
+		curr_sp = be_new_CopyKeep_single(env->isa->sp->reg_class, env->irg, bl, curr_sp, curr_bp, get_irn_mode(curr_sp));
+		be_set_constr_single_reg(curr_sp, BE_OUT_POS(0), env->isa->sp);
+		arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
+		be_node_set_flags(curr_sp, BE_OUT_POS(0), arch_irn_flags_ignore);
+
+		be_abi_reg_map_set(reg_map, env->isa->sp, curr_sp);
+		be_abi_reg_map_set(reg_map, env->isa->bp, curr_bp);
+
+		return env->isa->bp;
+	}
+
+	return env->isa->sp;
+}
+
+/**
+ * Generate the routine epilogue.
+ * @param self    The callback object.
+ * @param bl      The block for the epilog
+ * @param mem     A pointer to the mem node. Update this if you define new memory.
+ * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
+ * @return        The register which shall be used as a stack frame base.
+ *
+ * All nodes which define registers in @p reg_map must keep @p reg_map current.
+ */
+static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_map)
+{
+	ia32_abi_env_t *env  = self;
+	ir_node *curr_sp     = be_abi_reg_map_get(reg_map, env->isa->sp);
+	ir_node *curr_bp     = be_abi_reg_map_get(reg_map, env->isa->bp);
+
+	if (env->flags.try_omit_fp) {
+		/* simply remove the stack frame here */
+		curr_sp = be_new_IncSP(env->isa->sp, env->irg, bl, curr_sp, *mem, BE_STACK_FRAME_SIZE, be_stack_dir_shrink);
+	}
+	else {
+		const ia32_isa_t *isa = (ia32_isa_t *)env->isa;
+		ir_mode *mode_bp = env->isa->bp->reg_class->mode;
+
+		/* gcc always emits a leave at the end of a routine */
+		if (1 || ARCH_AMD(isa->opt_arch)) {
+			ir_node *leave;
+
+			/* leave */
+			leave = new_rd_ia32_Leave(NULL, env->irg, bl, curr_sp, *mem);
+			set_ia32_flags(leave, arch_irn_flags_ignore);
+			curr_bp = new_r_Proj(current_ir_graph, bl, leave, mode_bp, pn_ia32_Leave_frame);
+			curr_sp = new_r_Proj(current_ir_graph, bl, leave, get_irn_mode(curr_sp), pn_ia32_Leave_stack);
+			*mem    = new_r_Proj(current_ir_graph, bl, leave, mode_M, pn_ia32_Leave_M);
+		}
+		else {
+			ir_node *pop;
+
+			/* copy ebp to esp */
+			curr_sp = be_new_SetSP(env->isa->sp, env->irg, bl, curr_sp, curr_bp, *mem);
+
+			/* pop ebp */
+			pop = new_rd_ia32_Pop(NULL, env->irg, bl, curr_sp, *mem);
+			set_ia32_flags(pop, arch_irn_flags_ignore);
+			curr_bp = new_r_Proj(current_ir_graph, bl, pop, mode_bp, pn_ia32_Pop_res);
+			curr_sp = new_r_Proj(current_ir_graph, bl, pop, get_irn_mode(curr_sp), pn_ia32_Pop_stack);
+			*mem    = new_r_Proj(current_ir_graph, bl, pop, mode_M, pn_ia32_Pop_M);
+		}
+		arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
+		arch_set_irn_register(env->aenv, curr_bp, env->isa->bp);
 	}
+
+	be_abi_reg_map_set(reg_map, env->isa->sp, curr_sp);
+	be_abi_reg_map_set(reg_map, env->isa->bp, curr_bp);
 }
 
+/**
+ * Produces the type which sits between the stack args and the locals on the stack.
+ * it will contain the return address and space to store the old base pointer.
+ * @return The Firm type modeling the ABI between type.
+ */
+static ir_type *ia32_abi_get_between_type(void *self)
+{
+#define IDENT(s) new_id_from_chars(s, sizeof(s)-1)
+	static ir_type *omit_fp_between_type = NULL;
+	static ir_type *between_type         = NULL;
+
+	ia32_abi_env_t *env = self;
+
+	if ( !between_type) {
+		entity *old_bp_ent;
+		entity *ret_addr_ent;
+		entity *omit_fp_ret_addr_ent;
+
+		ir_type *old_bp_type   = new_type_primitive(IDENT("bp"), mode_P);
+		ir_type *ret_addr_type = new_type_primitive(IDENT("return_addr"), mode_P);
+
+		between_type           = new_type_struct(IDENT("ia32_between_type"));
+		old_bp_ent             = new_entity(between_type, IDENT("old_bp"), old_bp_type);
+		ret_addr_ent           = new_entity(between_type, IDENT("ret_addr"), ret_addr_type);
+
+		set_entity_offset_bytes(old_bp_ent, 0);
+		set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
+		set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
+		set_type_state(between_type, layout_fixed);
+
+		omit_fp_between_type = new_type_struct(IDENT("ia32_between_type_omit_fp"));
+		omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, IDENT("ret_addr"), ret_addr_type);
+
+		set_entity_offset_bytes(omit_fp_ret_addr_ent, 0);
+		set_type_size_bytes(omit_fp_between_type, get_type_size_bytes(ret_addr_type));
+		set_type_state(omit_fp_between_type, layout_fixed);
+	}
+
+	return env->flags.try_omit_fp ? omit_fp_between_type : between_type;
+#undef IDENT
+}
+
+/**
+ * Get the estimated cycle count for @p irn.
+ *
+ * @param self The this pointer.
+ * @param irn  The node.
+ *
+ * @return     The estimated cycle count for this operation
+ */
+static int ia32_get_op_estimated_cost(const void *self, const ir_node *irn)
+{
+	int cost;
+
+	if(is_Proj(irn))
+	  return 0;
+
+	switch (get_ia32_irn_opcode(irn)) {
+	case iro_ia32_xDiv:
+	case iro_ia32_DivMod:
+		cost = 8;
+		break;
+
+	case iro_ia32_xLoad:
+	case iro_ia32_l_Load:
+	case iro_ia32_Load:
+		cost = 25;
+		break;
+
+	case iro_ia32_Push:
+	case iro_ia32_Pop:
+		cost = 5;
+		break;
+
+	case iro_ia32_xStore:
+	case iro_ia32_l_Store:
+	case iro_ia32_Store:
+	case iro_ia32_Store8Bit:
+		cost = 50;
+		break;
+
+	case iro_ia32_MulS:
+	case iro_ia32_Mul:
+	case iro_ia32_Mulh:
+	case iro_ia32_xMul:
+	case iro_ia32_l_MulS:
+	case iro_ia32_l_Mul:
+		cost = 2;
+		break;
+
+	default:
+		cost = 1;
+	}
+
+	return cost;
+}
+
+/**
+ * Returns the inverse operation if @p irn, recalculating the argument at position @p i.
+ *
+ * @param irn       The original operation
+ * @param i         Index of the argument we want the inverse operation to yield
+ * @param inverse   struct to be filled with the resulting inverse op
+ * @param obstack   The obstack to use for allocation of the returned nodes array
+ * @return          The inverse operation or NULL if operation invertible
+ */
+static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obst) {
+	ir_graph *irg;
+	ir_mode  *mode;
+	ir_node  *block, *noreg, *nomem;
+	int      pnc;
+
+	/* we cannot invert non-ia32 irns */
+	if (! is_ia32_irn(irn))
+		return NULL;
+
+	/* operand must always be a real operand (not base, index or mem) */
+	if (i != 2 && i != 3)
+		return NULL;
+
+	/* we don't invert address mode operations */
+	if (get_ia32_op_type(irn) != ia32_Normal)
+		return NULL;
+
+	irg   = get_irn_irg(irn);
+	block = get_nodes_block(irn);
+	mode  = get_ia32_res_mode(irn);
+	noreg = get_irn_n(irn, 0);
+	nomem = new_r_NoMem(irg);
+
+	/* initialize structure */
+	inverse->nodes = obstack_alloc(obst, 2 * sizeof(inverse->nodes[0]));
+	inverse->costs = 0;
+	inverse->n     = 2;
+
+	switch (get_ia32_irn_opcode(irn)) {
+		case iro_ia32_Add:
+			if (get_ia32_immop_type(irn) == ia32_ImmConst) {
+				/* we have an add with a const here */
+				/* invers == add with negated const */
+				inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+				pnc               = pn_ia32_Add_res;
+				inverse->costs   += 1;
+				copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+				set_ia32_Immop_tarval(inverse->nodes[0], tarval_neg(get_ia32_Immop_tarval(irn)));
+				set_ia32_commutative(inverse->nodes[0]);
+			}
+			else if (get_ia32_immop_type(irn) == ia32_ImmSymConst) {
+				/* we have an add with a symconst here */
+				/* invers == sub with const */
+				inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+				pnc               = pn_ia32_Sub_res;
+				inverse->costs   += 2;
+				copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+			}
+			else {
+				/* normal add: inverse == sub */
+				ir_node *proj = ia32_get_res_proj(irn);
+				assert(proj);
+
+				inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, i ^ 1), nomem);
+				pnc               = pn_ia32_Sub_res;
+				inverse->costs   += 2;
+			}
+			break;
+		case iro_ia32_Sub:
+			if (get_ia32_immop_type(irn) != ia32_ImmNone) {
+				/* we have a sub with a const/symconst here */
+				/* invers == add with this const */
+				inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+				pnc               = pn_ia32_Add_res;
+				inverse->costs   += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
+				copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+			}
+			else {
+				/* normal sub */
+				ir_node *proj = ia32_get_res_proj(irn);
+				assert(proj);
+
+				if (i == 2) {
+					inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, 3), nomem);
+				}
+				else {
+					inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, 2), proj, nomem);
+				}
+				pnc             = pn_ia32_Sub_res;
+				inverse->costs += 1;
+			}
+			break;
+		case iro_ia32_Eor:
+			if (get_ia32_immop_type(irn) != ia32_ImmNone) {
+				/* xor with const: inverse = xor */
+				inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+				pnc               = pn_ia32_Eor_res;
+				inverse->costs   += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
+				copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+			}
+			else {
+				/* normal xor */
+				inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, (ir_node *)irn, get_irn_n(irn, i), nomem);
+				pnc               = pn_ia32_Eor_res;
+				inverse->costs   += 1;
+			}
+			break;
+		case iro_ia32_Not: {
+			ir_node *proj = ia32_get_res_proj(irn);
+			assert(proj);
+
+			inverse->nodes[0] = new_rd_ia32_Not(NULL, irg, block, noreg, noreg, proj, nomem);
+			pnc = pn_ia32_Not_res;
+			inverse->costs   += 1;
+			break;
+		}
+		case iro_ia32_Minus: {
+			ir_node *proj = ia32_get_res_proj(irn);
+			assert(proj);
+
+			inverse->nodes[0] = new_rd_ia32_Minus(NULL, irg, block, noreg, noreg, proj, nomem);
+			pnc               = pn_ia32_Minus_res;
+			inverse->costs   += 1;
+			break;
+		}
+		default:
+			/* inverse operation not supported */
+			return NULL;
+	}
+
+	set_ia32_res_mode(inverse->nodes[0], mode);
+	inverse->nodes[1] = new_r_Proj(irg, block, inverse->nodes[0], mode, pnc);
+
+	return inverse;
+}
+
+/**
+ * Check if irn can load it's operand at position i from memory (source addressmode).
+ * @param self   Pointer to irn ops itself
+ * @param irn    The irn to be checked
+ * @param i      The operands position
+ * @return Non-Zero if operand can be loaded
+ */
+static int ia32_possible_memory_operand(const void *self, const ir_node *irn, unsigned int i) {
+	if (! is_ia32_irn(irn)                            ||  /* must be an ia32 irn */
+		get_irn_arity(irn) != 5                       ||  /* must be a binary operation */
+		get_ia32_op_type(irn) != ia32_Normal          ||  /* must not already be a addressmode irn */
+		! (get_ia32_am_support(irn) & ia32_am_Source) ||  /* must be capable of source addressmode */
+        (i != 2 && i != 3)                            ||  /* a "real" operand position must be requested */
+		(i == 2 && ! is_ia32_commutative(irn))        ||  /* if first operand requested irn must be commutative */
+		is_ia32_use_frame(irn))                           /* must not already use frame */
+		return 0;
+
+	return 1;
+}
+
+static void ia32_perform_memory_operand(const void *self, ir_node *irn, ir_node *reload, unsigned int i) {
+	assert(ia32_possible_memory_operand(self, irn, i) && "Cannot perform memory operand change");
+	assert(get_nodes_block(reload) == get_nodes_block(irn) && "Reload must be in same block as irn.");
+
+	if (get_irn_n_edges(reload) > 1)
+		return;
+
+	if (i == 2) {
+		ir_node *tmp = get_irn_n(irn, 3);
+		set_irn_n(irn, 3, get_irn_n(irn, 2));
+		set_irn_n(irn, 2, tmp);
+	}
+
+	set_ia32_am_support(irn, ia32_am_Source);
+	set_ia32_op_type(irn, ia32_AddrModeS);
+	set_ia32_am_flavour(irn, ia32_B);
+	set_ia32_ls_mode(irn, get_irn_mode(reload));
+	set_ia32_frame_ent(irn, be_get_frame_entity(reload));
+	set_ia32_use_frame(irn);
+
+	set_irn_n(irn, 0, be_get_Reload_frame(reload));
+	set_irn_n(irn, 4, be_get_Reload_mem(reload));
+
+	/*
+		Input at position one is index register, which is NoReg.
+		We would need cg object to get a real noreg, but we cannot
+		access it from here.
+	 */
+	set_irn_n(irn, 3, get_irn_n(irn, 1));
+
+	DBG_OPT_AM_S(reload, irn);
+}
+
+static const be_abi_callbacks_t ia32_abi_callbacks = {
+	ia32_abi_init,
+	free,
+	ia32_abi_get_between_type,
+	ia32_abi_dont_save_regs,
+	ia32_abi_prologue,
+	ia32_abi_epilogue,
+};
+
 /* fill register allocator interface */
 
 static const arch_irn_ops_if_t ia32_irn_ops_if = {
@@ -233,7 +722,11 @@ static const arch_irn_ops_if_t ia32_irn_ops_if = {
 	ia32_classify,
 	ia32_get_flags,
 	ia32_get_frame_entity,
-	ia32_set_stack_bias
+	ia32_set_stack_bias,
+	ia32_get_inverse,
+	ia32_get_op_estimated_cost,
+	ia32_possible_memory_operand,
+	ia32_perform_memory_operand,
 };
 
 ia32_irn_ops_t ia32_irn_ops = {
@@ -260,86 +753,116 @@ ia32_irn_ops_t ia32_irn_ops = {
  */
 static void ia32_prepare_graph(void *self) {
 	ia32_code_gen_t *cg = self;
+	dom_front_info_t *dom;
+	DEBUG_ONLY(firm_dbg_module_t *old_mod = cg->mod;)
 
-	irg_walk_blkwise_graph(cg->irg, ia32_place_consts, ia32_transform_node, cg);
-	dump_ir_block_graph_sched(cg->irg, "-transformed");
-	edges_deactivate(cg->irg);
-	edges_activate(cg->irg);
-	irg_walk_blkwise_graph(cg->irg, NULL, ia32_optimize_am, cg);
-	dump_ir_block_graph_sched(cg->irg, "-am");
-}
+	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.transform");
+
+	/* 1st: transform constants and psi condition trees */
+	ia32_pre_transform_phase(cg);
+
+	/* 2nd: transform all remaining nodes */
+	ia32_register_transformers();
+	dom = be_compute_dominance_frontiers(cg->irg);
+	irg_walk_blkwise_graph(cg->irg, NULL, ia32_transform_node, cg);
+	be_free_dominance_frontiers(dom);
+
+	if (cg->dump)
+		be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
 
+	/* 3rd: optimize address mode */
+	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.am");
+	ia32_optimize_addressmode(cg);
+
+	if (cg->dump)
+		be_dump(cg->irg, "-am", dump_ir_block_graph_sched);
+
+	DEBUG_ONLY(cg->mod = old_mod;)
+}
 
 /**
- * Insert copies for all ia32 nodes where the should_be_same requirement
- * is not fulfilled.
+ * Dummy functions for hooks we don't need but which must be filled.
  */
-static void ia32_finish_irg_walker(ir_node *irn, void *env) {
-	ia32_code_gen_t            *cg = env;
-	const ia32_register_req_t **reqs;
-	const arch_register_t      *out_reg, *in_reg;
-	int                         n_res, i;
-	ir_node                    *copy, *in_node, *block;
+static void ia32_before_sched(void *self) {
+}
 
-	if (! is_ia32_irn(irn))
+static void remove_unused_nodes(ir_node *irn, bitset_t *already_visited) {
+	int i;
+	ir_mode *mode;
+	ir_node *mem_proj;
+
+	if (is_Block(irn))
 		return;
 
-	/* nodes with destination address mode don't produce values */
-	if (get_ia32_op_type(irn) == ia32_AddrModeD)
+	mode = get_irn_mode(irn);
+
+	/* check if we already saw this node or the node has more than one user */
+	if (bitset_contains_irn(already_visited, irn) || get_irn_n_edges(irn) > 1)
 		return;
 
-	reqs  = get_ia32_out_req_all(irn);
-	n_res = get_ia32_n_res(irn);
-	block = get_nodes_block(irn);
+	/* mark irn visited */
+	bitset_add_irn(already_visited, irn);
 
-	/* check all OUT requirements, if there is a should_be_same */
-	for (i = 0; i < n_res; i++) {
-		if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
-			/* get in and out register */
-			out_reg = get_ia32_out_reg(irn, i);
-			in_node = get_irn_n(irn, reqs[i]->same_pos);
-			in_reg  = arch_get_irn_register(cg->arch_env, in_node);
+	/* non-Tuple nodes with one user: ok, return */
+	if (get_irn_n_edges(irn) >= 1 && mode != mode_T)
+		return;
 
-			/* check if in and out register are equal */
-			if (arch_register_get_index(out_reg) != arch_register_get_index(in_reg)) {
-				DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
+	/* tuple node has one user which is not the mem proj-> ok */
+	if (mode == mode_T && get_irn_n_edges(irn) == 1) {
+		mem_proj = ia32_get_proj_for_mode(irn, mode_M);
+		if (! mem_proj)
+			return;
+	}
 
-				/* create copy from in register */
-				copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
+	for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
+		ir_node *pred = get_irn_n(irn, i);
 
-				/* destination is the out register */
-				arch_set_irn_register(cg->arch_env, copy, out_reg);
+		/* do not follow memory edges or we will accidentally remove stores */
+		if (is_Proj(pred) && get_irn_mode(pred) == mode_M)
+			continue;
 
-				/* insert copy before the node into the schedule */
-				sched_add_before(irn, copy);
+		set_irn_n(irn, i, new_Bad());
 
-				/* set copy as in */
-				set_irn_n(irn, reqs[i]->same_pos, copy);
-			}
-		}
+		/*
+			The current node is about to be removed: if the predecessor
+			has only this node as user, it need to be removed as well.
+		*/
+		if (get_irn_n_edges(pred) <= 1)
+			remove_unused_nodes(pred, already_visited);
 	}
-}
 
-/**
- * Add Copy nodes for not fulfilled should_be_equal constraints
- */
-static void ia32_finish_irg(ir_graph *irg, ia32_code_gen_t *cg) {
-	irg_walk_blkwise_graph(irg, NULL, ia32_finish_irg_walker, cg);
+	if (sched_is_scheduled(irn))
+		sched_remove(irn);
 }
 
-
+static void remove_unused_loads_walker(ir_node *irn, void *env) {
+	bitset_t *already_visited = env;
+	if (is_ia32_Ld(irn) && ! bitset_contains_irn(already_visited, irn))
+		remove_unused_nodes(irn, env);
+}
 
 /**
- * Dummy functions for hooks we don't need but which must be filled.
+ * Called before the register allocator.
+ * Calculate a block schedule here. We need it for the x87
+ * simulator and the emitter.
  */
-static void ia32_before_sched(void *self) {
-}
-
 static void ia32_before_ra(void *self) {
+	ia32_code_gen_t *cg              = self;
+	bitset_t        *already_visited = bitset_irg_malloc(cg->irg);
+
+	cg->blk_sched = sched_create_block_schedule(cg->irg);
+
+	/*
+		Handle special case:
+		There are sometimes unused loads, only pinned by memory.
+		We need to remove those Loads and all other nodes which won't be used
+		after removing the Load from schedule.
+	*/
+	irg_walk_graph(cg->irg, remove_unused_loads_walker, NULL, already_visited);
+	bitset_free(already_visited);
 }
 
 
-
 /**
  * Transforms a be node into a Load.
  */
@@ -360,10 +883,13 @@ static void transform_to_Load(ia32_transform_env_t *env) {
 	}
 
 	if (mode_is_float(mode)) {
-		new_op = new_rd_ia32_fLoad(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
+		if (USE_SSE2(env->cg))
+			new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem);
+		else
+			new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem);
 	}
 	else {
-		new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
+		new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem);
 	}
 
 	set_ia32_am_support(new_op, ia32_am_Source);
@@ -373,6 +899,8 @@ static void transform_to_Load(ia32_transform_env_t *env) {
 	set_ia32_frame_ent(new_op, ent);
 	set_ia32_use_frame(new_op);
 
+	DBG_OPT_RELOAD2LD(irn, new_op);
+
 	proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, pn_Load_res);
 
 	if (sched_point) {
@@ -386,8 +914,9 @@ static void transform_to_Load(ia32_transform_env_t *env) {
 	reg = arch_get_irn_register(env->cg->arch_env, irn);
 	arch_set_irn_register(env->cg->arch_env, new_op, reg);
 
-	exchange(irn, proj);
+	SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
 
+	exchange(irn, proj);
 }
 
 /**
@@ -409,66 +938,105 @@ static void transform_to_Store(ia32_transform_env_t *env) {
 	}
 
 	if (mode_is_float(mode)) {
-		new_op = new_rd_ia32_fStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+		if (USE_SSE2(env->cg))
+			new_op = new_rd_ia32_xStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
+		else
+			new_op = new_rd_ia32_vfst(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
+	}
+	else if (get_mode_size_bits(mode) == 8) {
+		new_op = new_rd_ia32_Store8Bit(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
 	}
 	else {
-		new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+		new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
 	}
 
 	set_ia32_am_support(new_op, ia32_am_Dest);
 	set_ia32_op_type(new_op, ia32_AddrModeD);
 	set_ia32_am_flavour(new_op, ia32_B);
-	set_ia32_ls_mode(new_op, get_irn_mode(val));
+	set_ia32_ls_mode(new_op, mode);
 	set_ia32_frame_ent(new_op, ent);
 	set_ia32_use_frame(new_op);
 
-	proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, 0);
+	DBG_OPT_SPILL2ST(irn, new_op);
+
+	proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode_M, pn_ia32_Store_M);
 
 	if (sched_point) {
 		sched_add_after(sched_point, new_op);
-		sched_add_after(new_op, proj);
-
 		sched_remove(irn);
 	}
 
+	SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
+
 	exchange(irn, proj);
+}
 
+/**
+ * Fix the mode of Spill/Reload
+ */
+static ir_mode *fix_spill_mode(ia32_code_gen_t *cg, ir_mode *mode)
+{
+	if (mode_is_float(mode)) {
+		if (USE_SSE2(cg))
+			mode = mode_D;
+		else
+			mode = mode_E;
+	}
+	else
+		mode = mode_Is;
+	return mode;
 }
 
 /**
- * Calls the transform functions for StackParam, Spill and Reload.
+ * Block-Walker: Calls the transform functions Spill and Reload.
  */
-static void ia32_after_ra_walker(ir_node *node, void *env) {
+static void ia32_after_ra_walker(ir_node *block, void *env) {
+	ir_node *node, *prev;
 	ia32_code_gen_t *cg = env;
-	ir_node *new_node   = NULL;
 	ia32_transform_env_t tenv;
 
-	if (is_Block(node))
-		return;
-
-	tenv.block = get_nodes_block(node);
-	tenv.dbg   = get_irn_dbg_info(node);
+	tenv.block = block;
 	tenv.irg   = current_ir_graph;
-	tenv.irn   = node;
-	tenv.mod   = cg->mod;
-	tenv.mode  = get_irn_mode(node);
 	tenv.cg    = cg;
-
-	if (be_is_StackParam(node) || be_is_Reload(node)) {
-		transform_to_Load(&tenv);
-	}
-	else if (be_is_Spill(node)) {
-		transform_to_Store(&tenv);
+	DEBUG_ONLY(tenv.mod = cg->mod;)
+
+	/* beware: the schedule is changed here */
+	for (node = sched_last(block); !sched_is_begin(node); node = prev) {
+		prev = sched_prev(node);
+		if (be_is_Reload(node)) {
+			/* we always reload the whole register  */
+			tenv.dbg  = get_irn_dbg_info(node);
+			tenv.irn  = node;
+			tenv.mode = fix_spill_mode(cg, get_irn_mode(node));
+			transform_to_Load(&tenv);
+		}
+		else if (be_is_Spill(node)) {
+			ir_node *spillval = get_irn_n(node, be_pos_Spill_val);
+			/* we always spill the whole register  */
+			tenv.dbg  = get_irn_dbg_info(node);
+			tenv.irn  = node;
+			tenv.mode = fix_spill_mode(cg, get_irn_mode(spillval));
+			transform_to_Store(&tenv);
+		}
 	}
 }
 
 /**
- * We transform StackParam, Spill and Reload here. This needs to be done before
+ * We transform Spill and Reload here. This needs to be done before
  * stack biasing otherwise we would miss the corrected offset for these nodes.
+ *
+ * If x87 instruction should be emitted, run the x87 simulator and patch
+ * the virtual instructions. This must obviously be done after register allocation.
  */
 static void ia32_after_ra(void *self) {
 	ia32_code_gen_t *cg = self;
-	irg_walk_blkwise_graph(cg->irg, NULL, ia32_after_ra_walker, self);
+
+	irg_block_walk_graph(cg->irg, NULL, ia32_after_ra_walker, self);
+
+	/* if we do x87 code generation, rewrite all the virtual instructions and registers */
+	if (cg->used_fp == fp_x87 || cg->force_sim) {
+		x87_simulate_graph(cg->arch_env, cg->irg, cg->blk_sched);
+	}
 }
 
 
@@ -479,31 +1047,28 @@ static void ia32_after_ra(void *self) {
 static void ia32_codegen(void *self) {
 	ia32_code_gen_t *cg = self;
 	ir_graph        *irg = cg->irg;
-	FILE            *out = cg->out;
-
-	if (cg->emit_decls) {
-		ia32_gen_decls(cg->out);
-		cg->emit_decls = 0;
-	}
 
 	ia32_finish_irg(irg, cg);
-	dump_ir_block_graph_sched(irg, "-finished");
-	ia32_gen_routine(out, irg, cg);
+	if (cg->dump)
+		be_dump(irg, "-finished", dump_ir_block_graph_sched);
+	ia32_gen_routine(cg->isa->out, irg, cg);
 
 	cur_reg_set = NULL;
 
-	pmap_destroy(cg->tv_ent);
-	pmap_destroy(cg->types);
+	/* remove it from the isa */
+	cg->isa->cg = NULL;
 
 	/* de-allocate code generator */
 	del_set(cg->reg_set);
 	free(self);
+
 }
 
-static void *ia32_cg_init(FILE *F, const be_irg_t *birg);
+static void *ia32_cg_init(const be_irg_t *birg);
 
 static const arch_code_generator_if_t ia32_code_gen_if = {
 	ia32_cg_init,
+	NULL,                /* before abi introduce hook */
 	ia32_prepare_graph,
 	ia32_before_sched,   /* before scheduling hook */
 	ia32_before_ra,      /* before register allocation hook */
@@ -512,28 +1077,43 @@ static const arch_code_generator_if_t ia32_code_gen_if = {
 };
 
 /**
- * Initializes the code generator.
+ * Initializes a IA32 code generator.
  */
-static void *ia32_cg_init(FILE *F, const be_irg_t *birg) {
+static void *ia32_cg_init(const be_irg_t *birg) {
 	ia32_isa_t      *isa = (ia32_isa_t *)birg->main_env->arch_env->isa;
 	ia32_code_gen_t *cg  = xcalloc(1, sizeof(*cg));
 
-	cg->impl     = &ia32_code_gen_if;
-	cg->irg      = birg->irg;
-	cg->reg_set  = new_set(ia32_cmp_irn_reg_assoc, 1024);
-	cg->mod      = firm_dbg_register("firm.be.ia32.cg");
-	cg->out      = F;
-	cg->arch_env = birg->main_env->arch_env;
-	cg->types    = pmap_create();
-	cg->tv_ent   = pmap_create();
-	cg->birg     = birg;
-
-	isa->num_codegens++;
-
-	if (isa->num_codegens > 1)
-		cg->emit_decls = 0;
-	else
-		cg->emit_decls = 1;
+	cg->impl      = &ia32_code_gen_if;
+	cg->irg       = birg->irg;
+	cg->reg_set   = new_set(ia32_cmp_irn_reg_assoc, 1024);
+	cg->arch_env  = birg->main_env->arch_env;
+	cg->isa       = isa;
+	cg->birg      = birg;
+	cg->blk_sched = NULL;
+	cg->fp_to_gp  = NULL;
+	cg->gp_to_fp  = NULL;
+	cg->fp_kind   = isa->fp_kind;
+	cg->used_fp   = fp_none;
+	cg->dump      = (birg->main_env->options->dump_flags & DUMP_BE) ? 1 : 0;
+
+	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.cg");
+
+	/* copy optimizations from isa for easier access */
+	cg->opt      = isa->opt;
+	cg->arch     = isa->arch;
+	cg->opt_arch = isa->opt_arch;
+
+	/* enter it */
+	isa->cg = cg;
+
+#ifndef NDEBUG
+	if (isa->name_obst_size) {
+		//printf("freed %d bytes from name obst\n", isa->name_obst_size);
+		isa->name_obst_size = 0;
+		obstack_free(isa->name_obst, NULL);
+		obstack_init(isa->name_obst);
+	}
+#endif /* NDEBUG */
 
 	cur_reg_set = cg->reg_set;
 
@@ -554,30 +1134,126 @@ static void *ia32_cg_init(FILE *F, const be_irg_t *birg) {
  *
  *****************************************************************/
 
+/**
+ * Set output modes for GCC
+ */
+static const tarval_mode_info mo_integer = {
+	TVO_DECIMAL,
+	NULL,
+	NULL,
+};
+
+/*
+* set the tarval output mode to C-semantics
+*/
+static void set_tarval_output_modes(void)
+{
+	set_tarval_mode_output_option(get_modeLs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeLu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeIs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeHs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeHu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeBs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeBu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeC(),  &mo_integer);
+	set_tarval_mode_output_option(get_modeU(),  &mo_integer);
+	set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+}
+
+
+/**
+ * The template that generates a new ISA object.
+ * Note that this template can be changed by command line
+ * arguments.
+ */
 static ia32_isa_t ia32_isa_template = {
-	&ia32_isa_if,
-	&ia32_gp_regs[REG_ESP],
-	&ia32_gp_regs[REG_EBP],
-	-1,
-	0
+	{
+		&ia32_isa_if,            /* isa interface implementation */
+		&ia32_gp_regs[REG_ESP],  /* stack pointer register */
+		&ia32_gp_regs[REG_EBP],  /* base pointer register */
+		-1,                      /* stack direction */
+	},
+	NULL,                    /* 16bit register names */
+	NULL,                    /* 8bit register names */
+	NULL,                    /* types */
+	NULL,                    /* tv_ents */
+	(0                 |
+	IA32_OPT_INCDEC    |     /* optimize add 1, sub 1 into inc/dec               default: on  */
+	IA32_OPT_DOAM      |     /* optimize address mode                            default: on  */
+	IA32_OPT_LEA       |     /* optimize for LEAs                                default: on  */
+	IA32_OPT_PLACECNST |     /* place constants immediately before instructions, default: on  */
+	IA32_OPT_IMMOPS    |     /* operations can use immediates,                   default: on  */
+	IA32_OPT_EXTBB),         /* use extended basic block scheduling,             default: on  */
+	arch_pentium_4,          /* instruction architecture */
+	arch_pentium_4,          /* optimize for architecture */
+	fp_sse2,                 /* use sse2 unit */
+	NULL,                    /* current code generator */
+#ifndef NDEBUG
+	NULL,                    /* name obstack */
+	0                        /* name obst size */
+#endif
 };
 
 /**
  * Initializes the backend ISA.
  */
-static void *ia32_init(void) {
+static void *ia32_init(FILE *file_handle) {
 	static int inited = 0;
 	ia32_isa_t *isa;
 
-	if(inited)
+	if (inited)
 		return NULL;
 
-	isa = xcalloc(1, sizeof(*isa));
+	set_tarval_output_modes();
+
+	isa = xmalloc(sizeof(*isa));
 	memcpy(isa, &ia32_isa_template, sizeof(*isa));
 
 	ia32_register_init(isa);
 	ia32_create_opcodes();
 
+	if ((ARCH_INTEL(isa->arch) && isa->arch < arch_pentium_4) ||
+	    (ARCH_AMD(isa->arch) && isa->arch < arch_athlon))
+		/* no SSE2 for these cpu's */
+		isa->fp_kind = fp_x87;
+
+	if (ARCH_INTEL(isa->opt_arch) && isa->opt_arch >= arch_pentium_4) {
+		/* Pentium 4 don't like inc and dec instructions */
+		isa->opt &= ~IA32_OPT_INCDEC;
+	}
+
+	isa->regs_16bit = pmap_create();
+	isa->regs_8bit  = pmap_create();
+	isa->types      = pmap_create();
+	isa->tv_ent     = pmap_create();
+	isa->out        = file_handle;
+
+	ia32_build_16bit_reg_map(isa->regs_16bit);
+	ia32_build_8bit_reg_map(isa->regs_8bit);
+
+	/* patch register names of x87 registers */
+	if (USE_x87(isa)) {
+		ia32_st_regs[0].name = "st";
+		ia32_st_regs[1].name = "st(1)";
+		ia32_st_regs[2].name = "st(2)";
+		ia32_st_regs[3].name = "st(3)";
+		ia32_st_regs[4].name = "st(4)";
+		ia32_st_regs[5].name = "st(5)";
+		ia32_st_regs[6].name = "st(6)";
+		ia32_st_regs[7].name = "st(7)";
+	}
+
+#ifndef NDEBUG
+	isa->name_obst = xmalloc(sizeof(*isa->name_obst));
+	obstack_init(isa->name_obst);
+	isa->name_obst_size = 0;
+#endif /* NDEBUG */
+
+	ia32_handle_intrinsics();
+	ia32_switch_section(NULL, NO_SECTION);
+	fprintf(isa->out, "\t.intel_syntax\n");
+
 	inited = 1;
 
 	return isa;
@@ -589,18 +1265,47 @@ static void *ia32_init(void) {
  * Closes the output file and frees the ISA structure.
  */
 static void ia32_done(void *self) {
+	ia32_isa_t *isa = self;
+
+	/* emit now all global declarations */
+	ia32_gen_decls(isa->out);
+
+	pmap_destroy(isa->regs_16bit);
+	pmap_destroy(isa->regs_8bit);
+	pmap_destroy(isa->tv_ent);
+	pmap_destroy(isa->types);
+
+#ifndef NDEBUG
+	//printf("name obst size = %d bytes\n", isa->name_obst_size);
+	obstack_free(isa->name_obst, NULL);
+#endif /* NDEBUG */
+
 	free(self);
 }
 
 
-
+/**
+ * Return the number of register classes for this architecture.
+ * We report always these:
+ *  - the general purpose registers
+ *  - the SSE floating point register set
+ *  - the virtual floating point registers
+ */
 static int ia32_get_n_reg_class(const void *self) {
-	return N_CLASSES;
+	return 3;
 }
 
+/**
+ * Return the register class for index i.
+ */
 static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
-	assert(i >= 0 && i < N_CLASSES && "Invalid ia32 register class requested.");
-	return &ia32_reg_classes[i];
+	assert(i >= 0 && i < 3 && "Invalid ia32 register class requested.");
+	if (i == 0)
+		return &ia32_reg_classes[CLASS_ia32_gp];
+	else if (i == 1)
+		return &ia32_reg_classes[CLASS_ia32_xmm];
+	else
+		return &ia32_reg_classes[CLASS_ia32_vfp];
 }
 
 /**
@@ -610,63 +1315,44 @@ static const arch_register_class_t *ia32_get_reg_class(const void *self, int i)
  * @return A register class which can hold values of the given mode.
  */
 const arch_register_class_t *ia32_get_reg_class_for_mode(const void *self, const ir_mode *mode) {
-	if (mode_is_float(mode))
-		return &ia32_reg_classes[CLASS_ia32_fp];
+	const ia32_isa_t *isa = self;
+	if (mode_is_float(mode)) {
+		return USE_SSE2(isa) ? &ia32_reg_classes[CLASS_ia32_xmm] : &ia32_reg_classes[CLASS_ia32_vfp];
+	}
 	else
 		return &ia32_reg_classes[CLASS_ia32_gp];
 }
 
-/**
- * Produces the type which sits between the stack args and the locals on the stack.
- * it will contain the return address and space to store the old base pointer.
- * @return The Firm type modelling the ABI between type.
- */
-static ir_type *get_between_type(void)
-{
-	static ir_type *between_type = NULL;
-	static entity *old_bp_ent    = NULL;
-
-	if(!between_type) {
-		entity *ret_addr_ent;
-		ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
-		ir_type *old_bp_type   = new_type_primitive(new_id_from_str("bp"), mode_P);
-
-		between_type           = new_type_class(new_id_from_str("ia32_between_type"));
-		old_bp_ent             = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
-		ret_addr_ent           = new_entity(between_type, new_id_from_str("ret_addr"), ret_addr_type);
-
-		set_entity_offset_bytes(old_bp_ent, 0);
-		set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
-		set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
-	}
-
-	return between_type;
-}
-
 /**
  * Get the ABI restrictions for procedure calls.
  * @param self        The this pointer.
  * @param method_type The type of the method (procedure) in question.
  * @param abi         The abi object to be modified
  */
-void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
-	ir_type  *between_type;
+static void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
+	const ia32_isa_t *isa = self;
 	ir_type  *tp;
 	ir_mode  *mode;
 	unsigned  cc        = get_method_calling_convention(method_type);
 	int       n         = get_method_n_params(method_type);
 	int       biggest_n = -1;
 	int       stack_idx = 0;
-	int       i, ignore;
+	int       i, ignore_1, ignore_2;
 	ir_mode **modes;
 	const arch_register_t *reg;
-	be_abi_call_flags_t call_flags = { 0, 0, 0, 0, 1 };
+	be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
 
-	/* get the between type and the frame pointer save entity */
-	between_type = get_between_type();
+	unsigned use_push = !IS_P6_ARCH(isa->opt_arch);
+
+	/* set abi flags for calls */
+	call_flags.bits.left_to_right         = 0;  /* always last arg first on stack */
+	call_flags.bits.store_args_sequential = use_push;
+	/* call_flags.bits.try_omit_fp                 not changed: can handle both settings */
+	call_flags.bits.fp_free               = 0;  /* the frame pointer is fixed in IA32 */
+	call_flags.bits.call_has_imm          = 1;  /* IA32 calls can have immediate address */
 
 	/* set stack parameter passing style */
-	be_abi_call_set_flags(abi, call_flags, between_type);
+	be_abi_call_set_flags(abi, call_flags, &ia32_abi_callbacks);
 
 	/* collect the mode for each type */
 	modes = alloca(n * sizeof(modes[0]));
@@ -679,7 +1365,7 @@ void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *ab
 	/* set register parameters  */
 	if (cc & cc_reg_param) {
 		/* determine the number of parameters passed via registers */
-		biggest_n = ia32_get_n_regparam_class(n, modes, &ignore, &ignore);
+		biggest_n = ia32_get_n_regparam_class(n, modes, &ignore_1, &ignore_2);
 
 		/* loop over all parameters and set the register requirements */
 		for (i = 0; i <= biggest_n; i++) {
@@ -694,7 +1380,7 @@ void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *ab
 
 	/* set stack parameters */
 	for (i = stack_idx; i < n; i++) {
-		be_abi_call_param_stack(abi, i);
+		be_abi_call_param_stack(abi, i, 1, 0, 0);
 	}
 
 
@@ -719,11 +1405,17 @@ void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *ab
 		be_abi_call_res_reg(abi, 1, &ia32_gp_regs[REG_EDX]);
 	}
 	else if (n == 1) {
+		const arch_register_t *reg;
+
 		tp   = get_method_res_type(method_type, 0);
 		assert(is_atomic_type(tp));
 		mode = get_type_mode(tp);
 
-		be_abi_call_res_reg(abi, 0, mode_is_float(mode) ? &ia32_fp_regs[REG_XMM0] : &ia32_gp_regs[REG_EAX]);
+		reg = mode_is_float(mode) ?
+			(USE_SSE2(isa) ? &ia32_xmm_regs[REG_XMM0] : &ia32_vfp_regs[REG_VF0]) :
+			&ia32_gp_regs[REG_EAX];
+
+		be_abi_call_res_reg(abi, 0, reg);
 	}
 }
 
@@ -741,7 +1433,7 @@ const arch_irn_handler_t *ia32_get_irn_handler(const void *self) {
 }
 
 int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
-	return is_ia32_irn(irn);
+	return is_ia32_irn(irn) ? 1 : -1;
 }
 
 /**
@@ -757,21 +1449,142 @@ list_sched_selector_t ia32_sched_selector;
  * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
  */
 static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self) {
+//	memcpy(&ia32_sched_selector, reg_pressure_selector, sizeof(list_sched_selector_t));
 	memcpy(&ia32_sched_selector, trivial_selector, sizeof(list_sched_selector_t));
 	ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
 	return &ia32_sched_selector;
 }
 
+/**
+ * Returns the necessary byte alignment for storing a register of given class.
+ */
+static int ia32_get_reg_class_alignment(const void *self, const arch_register_class_t *cls) {
+	ir_mode *mode = arch_register_class_mode(cls);
+	int bytes     = get_mode_size_bytes(mode);
+
+	if (mode_is_float(mode) && bytes > 8)
+		return 16;
+	return bytes;
+}
+
+static ia32_intrinsic_env_t intrinsic_env = { NULL, NULL };
+
+/**
+ * Returns the libFirm configuration parameter for this backend.
+ */
+static const backend_params *ia32_get_libfirm_params(void) {
+	static const arch_dep_params_t ad = {
+		1, /* also use subs */
+		4, /* maximum shifts */
+		31, /* maximum shift amount */
+
+		1, /* allow Mulhs */
+		1, /* allow Mulus */
+		32  /* Mulh allowed up to 32 bit */
+	};
+	static backend_params p = {
+		NULL,  /* no additional opcodes */
+		NULL,  /* will be set later */
+		1,     /* need dword lowering */
+		ia32_create_intrinsic_fkt,
+		&intrinsic_env,  /* context for ia32_create_intrinsic_fkt */
+	};
+
+	p.dep_param = &ad;
+	return &p;
+}
 #ifdef WITH_LIBCORE
+
+/* instruction set architectures. */
+static const lc_opt_enum_int_items_t arch_items[] = {
+	{ "386",        arch_i386, },
+	{ "486",        arch_i486, },
+	{ "pentium",    arch_pentium, },
+	{ "586",        arch_pentium, },
+	{ "pentiumpro", arch_pentium_pro, },
+	{ "686",        arch_pentium_pro, },
+	{ "pentiummmx", arch_pentium_mmx, },
+	{ "pentium2",   arch_pentium_2, },
+	{ "p2",         arch_pentium_2, },
+	{ "pentium3",   arch_pentium_3, },
+	{ "p3",         arch_pentium_3, },
+	{ "pentium4",   arch_pentium_4, },
+	{ "p4",         arch_pentium_4, },
+	{ "pentiumm",   arch_pentium_m, },
+	{ "pm",         arch_pentium_m, },
+	{ "core",       arch_core, },
+	{ "k6",         arch_k6, },
+	{ "athlon",     arch_athlon, },
+	{ "athlon64",   arch_athlon_64, },
+	{ "opteron",    arch_opteron, },
+	{ NULL,         0 }
+};
+
+static lc_opt_enum_int_var_t arch_var = {
+	&ia32_isa_template.arch, arch_items
+};
+
+static lc_opt_enum_int_var_t opt_arch_var = {
+	&ia32_isa_template.opt_arch, arch_items
+};
+
+static const lc_opt_enum_int_items_t fp_unit_items[] = {
+	{ "x87" ,    fp_x87 },
+	{ "sse2",    fp_sse2 },
+	{ NULL,      0 }
+};
+
+static lc_opt_enum_int_var_t fp_unit_var = {
+	&ia32_isa_template.fp_kind, fp_unit_items
+};
+
+static const lc_opt_enum_int_items_t gas_items[] = {
+	{ "linux",   ASM_LINUX_GAS },
+	{ "mingw",   ASM_MINGW_GAS },
+	{ NULL,      0 }
+};
+
+static lc_opt_enum_int_var_t gas_var = {
+	(int *)&asm_flavour, gas_items
+};
+
+static const lc_opt_table_entry_t ia32_options[] = {
+	LC_OPT_ENT_ENUM_INT("arch",      "select the instruction architecture", &arch_var),
+	LC_OPT_ENT_ENUM_INT("opt",       "optimize for instruction architecture", &opt_arch_var),
+	LC_OPT_ENT_ENUM_INT("fpunit",    "select the floating point unit", &fp_unit_var),
+	LC_OPT_ENT_NEGBIT("noaddrmode",  "do not use address mode", &ia32_isa_template.opt, IA32_OPT_DOAM),
+	LC_OPT_ENT_NEGBIT("nolea",       "do not optimize for LEAs", &ia32_isa_template.opt, IA32_OPT_LEA),
+	LC_OPT_ENT_NEGBIT("noplacecnst", "do not place constants", &ia32_isa_template.opt, IA32_OPT_PLACECNST),
+	LC_OPT_ENT_NEGBIT("noimmop",     "no operations with immediates", &ia32_isa_template.opt, IA32_OPT_IMMOPS),
+	LC_OPT_ENT_NEGBIT("noextbb",     "do not use extended basic block scheduling", &ia32_isa_template.opt, IA32_OPT_EXTBB),
+	LC_OPT_ENT_ENUM_INT("gasmode",   "set the GAS compatibility mode", &gas_var),
+	{ NULL }
+};
+
+/**
+ * Register command line options for the ia32 backend.
+ *
+ * Options so far:
+ *
+ * ia32-arch=arch    create instruction for arch
+ * ia32-opt=arch     optimize for run on arch
+ * ia32-fpunit=unit  select floating point unit (x87 or SSE2)
+ * ia32-incdec       optimize for inc/dec
+ * ia32-noaddrmode   do not use address mode
+ * ia32-nolea        do not optimize for LEAs
+ * ia32-noplacecnst  do not place constants,
+ * ia32-noimmop      no operations with immediates
+ * ia32-noextbb      do not use extended basic block scheduling
+ * ia32-gasmode      set the GAS compatibility mode
+ */
 static void ia32_register_options(lc_opt_entry_t *ent)
 {
+	lc_opt_entry_t *be_grp_ia32 = lc_opt_get_grp(ent, "ia32");
+	lc_opt_add_table(be_grp_ia32, ia32_options);
 }
 #endif /* WITH_LIBCORE */
 
 const arch_isa_if_t ia32_isa_if = {
-#ifdef WITH_LIBCORE
-	ia32_register_options,
-#endif
 	ia32_init,
 	ia32_done,
 	ia32_get_n_reg_class,
@@ -780,5 +1593,10 @@ const arch_isa_if_t ia32_isa_if = {
 	ia32_get_call_abi,
 	ia32_get_irn_handler,
 	ia32_get_code_generator_if,
-	ia32_get_list_sched_selector
+	ia32_get_list_sched_selector,
+	ia32_get_reg_class_alignment,
+	ia32_get_libfirm_params,
+#ifdef WITH_LIBCORE
+	ia32_register_options
+#endif
 };