X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fmips%2Fmips_emitter.c;h=a04d4d5feca65c2b2d1308b766125e9d05e9d8fd;hb=b599aa34a918a033aa4e50e63b4c445b07d2e0ec;hp=bcd7a20d63e75751a23104d70106bde6ca27cca7;hpb=18dfdacb6faf2f93d4f6f9a6362584f8c7eb30a1;p=libfirm

diff --git a/ir/be/mips/mips_emitter.c b/ir/be/mips/mips_emitter.c
index bcd7a20d6..a04d4d5fe 100644
--- a/ir/be/mips/mips_emitter.c
+++ b/ir/be/mips/mips_emitter.c
@@ -1,6 +1,28 @@
-/* mips emitter */
-/* $Id$ */
+/*
+ * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
 
+/**
+ * @file
+ * @brief   implementation of mips assembly emitter
+ * @author  Matthias Braun, Mehdi
+ * @version $Id$
+ */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -8,7 +30,6 @@
 #include <limits.h>
 
 #include "xmalloc.h"
-#include "tv.h"
 #include "iredges.h"
 #include "debug.h"
 #include "irgwalk.h"
@@ -17,10 +38,13 @@
 #include "irargs_t.h"
 #include "irprog_t.h"
 #include "irouts.h"
+#include "tv.h"
+#include "error.h"
 
 #include "../besched.h"
 #include "../benode_t.h"
 #include "../beutil.h"
+#include "../begnuas.h"
 
 #include "mips_emitter.h"
 #include "gen_mips_emitter.h"
@@ -28,10 +52,67 @@
 #include "mips_new_nodes.h"
 #include "mips_map_regs.h"
 
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
+
+#define BLOCK_PREFIX ".L"
+
 #define SNPRINTF_BUF_LEN 128
 
-static const arch_env_t *arch_env = NULL;
+/**
+ * Returns the register at in position pos.
+ */
+static const arch_register_t *get_in_reg(const arch_env_t *arch_env,
+                                         const ir_node *node, int pos)
+{
+	ir_node                *op;
+	const arch_register_t  *reg = NULL;
+
+	assert(get_irn_arity(node) > pos && "Invalid IN position");
+
+	/* The out register of the operator at position pos is the
+	   in register we need. */
+	op = get_irn_n(node, pos);
+
+	reg = arch_get_irn_register(arch_env, op);
+
+	assert(reg && "no in register found");
+	return reg;
+}
+
+/**
+ * Returns the register at out position pos.
+ */
+static const arch_register_t *get_out_reg(const arch_env_t *arch_env,
+                                          const ir_node *node, int pos)
+{
+	ir_node                *proj;
+	const arch_register_t  *reg = NULL;
+
+	/* 1st case: irn is not of mode_T, so it has only                 */
+	/*           one OUT register -> good                             */
+	/* 2nd case: irn is of mode_T -> collect all Projs and ask the    */
+	/*           Proj with the corresponding projnum for the register */
+
+	if (get_irn_mode(node) != mode_T) {
+		reg = arch_get_irn_register(arch_env, node);
+	} else if (is_mips_irn(node)) {
+		reg = get_mips_out_reg(node, pos);
+	} else {
+		const ir_edge_t *edge;
+
+		foreach_out_edge(node, edge) {
+			proj = get_edge_src_irn(edge);
+			assert(is_Proj(proj) && "non-Proj from mode_T node");
+			if (get_Proj_proj(proj) == pos) {
+				reg = arch_get_irn_register(arch_env, proj);
+				break;
+			}
+		}
+	}
 
+	assert(reg && "no out register found");
+	return reg;
+}
 
 /*************************************************************
  *             _       _    __   _          _
@@ -44,6 +125,29 @@ static const arch_env_t *arch_env = NULL;
  * |_|                                       |_|
  *************************************************************/
 
+/**
+ * Emit the name of the source register at given input position.
+ */
+void mips_emit_source_register(mips_emit_env_t *env, const ir_node *node,
+                               int pos)
+{
+	const arch_register_t *reg = get_in_reg(env->arch_env, node, pos);
+	be_emit_char(env->emit, '$');
+	be_emit_string(env->emit, arch_register_get_name(reg));
+}
+
+/**
+ * Emit the name of the destination register at given output position.
+ */
+void mips_emit_dest_register(mips_emit_env_t *env, const ir_node *node,
+                             int pos)
+{
+	const arch_register_t *reg = get_out_reg(env->arch_env, node, pos);
+	be_emit_char(env->emit, '$');
+	be_emit_string(env->emit, arch_register_get_name(reg));
+}
+
+#if 0
 static const char *get_symconst_str(ir_node *node)
 {
 	ident *id;
@@ -97,10 +201,10 @@ static const char *node_const_to_str(ir_node *n)
 		assert(attr->tv != NULL);
 		if(get_mode_sign(get_tarval_mode(attr->tv))) {
 			long val = get_tarval_long(attr->tv);
-			snprintf(buf, sizeof(buf), "0x%04X", val & 0xffff);
+			snprintf(buf, sizeof(buf), "0x%04lX", val & 0xffff);
 		} else {
 			unsigned long val = get_tarval_long(attr->tv);
-			snprintf(buf, sizeof(buf), "0x%04X", val & 0xffff);
+			snprintf(buf, sizeof(buf), "0x%04lX", val & 0xffff);
 		}
 
 		return buf;
@@ -109,11 +213,11 @@ static const char *node_const_to_str(ir_node *n)
 		if(get_mode_sign(get_tarval_mode(attr->tv))) {
 			long val = get_tarval_long(attr->tv);
 			val = (val & 0xffff0000) >> 16;
-			snprintf(buf, sizeof(buf), "0x%04X", val & 0xffff);
+			snprintf(buf, sizeof(buf), "0x%04lX", val & 0xffff);
 		} else {
 			unsigned long val = get_tarval_long(attr->tv);
 			val = (val & 0xffff0000) >> 16;
-			snprintf(buf, sizeof(buf), "0x%04X", val & 0xffff);
+			snprintf(buf, sizeof(buf), "0x%04lX", val & 0xffff);
 		}
 
 		return buf;
@@ -125,203 +229,70 @@ static const char *node_const_to_str(ir_node *n)
 
 	return buf;
 }
+#endif
 
-/**
- * Returns node's offset as string.
- */
-static const char *node_offset_to_str(ir_node *n)
+void mips_emit_load_store_address(mips_emit_env_t *env, const ir_node *node,
+                                  int pos)
 {
-	return "";
-}
+	const mips_load_store_attr_t *attr = get_mips_load_store_attr_const(node);
 
-/* We always pass the ir_node which is a pointer. */
-static int mips_get_arg_type(const lc_arg_occ_t *occ) {
-	return lc_arg_type_ptr;
+	be_emit_irprintf(env->emit, "%d(", attr->offset);
+	mips_emit_source_register(env, node, pos);
+	be_emit_char(env->emit, ')');
 }
 
-
-/**
- * Returns the register at in position pos.
- */
-static const arch_register_t *get_in_reg(ir_node *irn, int pos)
+void mips_emit_immediate_suffix(mips_emit_env_t *env, const ir_node *node,
+                                int pos)
 {
-	ir_node                *op;
-	const arch_register_t  *reg = NULL;
-
-	assert(get_irn_arity(irn) > pos && "Invalid IN position");
-
-	/* The out register of the operator at position pos is the
-	   in register we need. */
-	op = get_irn_n(irn, pos);
-
-	reg = arch_get_irn_register(arch_env, op);
-
-	assert(reg && "no in register found");
-	return reg;
+	ir_node *op = get_irn_n(node, pos);
+	if(is_mips_Immediate(op))
+		be_emit_char(env->emit, 'i');
 }
 
-/**
- * Returns the register at out position pos.
- */
-static const arch_register_t *get_out_reg(ir_node *irn, int pos)
+void mips_emit_immediate(mips_emit_env_t *env, const ir_node *node)
 {
-	ir_node                *proj;
-	const arch_register_t  *reg = NULL;
+	const mips_immediate_attr_t *attr = get_mips_immediate_attr_const(node);
 
-	/* 1st case: irn is not of mode_T, so it has only                 */
-	/*           one OUT register -> good                             */
-	/* 2nd case: irn is of mode_T -> collect all Projs and ask the    */
-	/*           Proj with the corresponding projnum for the register */
-
-	if (get_irn_mode(irn) != mode_T) {
-		reg = arch_get_irn_register(arch_env, irn);
-	}
-	else if (is_mips_irn(irn)) {
-		reg = get_mips_out_reg(irn, pos);
-	}
-	else {
-		const ir_edge_t *edge;
-
-		foreach_out_edge(irn, edge) {
-			proj = get_edge_src_irn(edge);
-			assert(is_Proj(proj) && "non-Proj from mode_T node");
-			if (get_Proj_proj(proj) == pos) {
-				reg = arch_get_irn_register(arch_env, proj);
-				break;
-			}
+	switch(attr->imm_type) {
+	case MIPS_IMM_CONST:
+		be_emit_irprintf(env->emit, "%d", attr->val);
+		break;
+	case MIPS_IMM_SYMCONST_LO:
+		be_emit_cstring(env->emit, "%lo($");
+		be_emit_ident(env->emit, get_entity_ld_ident(attr->entity));
+		if(attr->val != 0) {
+			be_emit_irprintf(env->emit, "%+d", attr->val);
 		}
+		be_emit_char(env->emit, ')');
+		break;
+	case MIPS_IMM_SYMCONST_HI:
+		be_emit_cstring(env->emit, "%hi($");
+		be_emit_ident(env->emit, get_entity_ld_ident(attr->entity));
+		if(attr->val != 0) {
+			be_emit_irprintf(env->emit, "%+d", attr->val);
+		}
+		be_emit_char(env->emit, ')');
+		break;
+	default:
+		panic("invalid immediate type found");
 	}
-
-	assert(reg && "no out register found");
-	return reg;
-}
-
-/**
- * Returns the number of the in register at position pos.
- */
-int get_mips_reg_nr(ir_node *irn, int pos, int in_out)
-{
-	const arch_register_t *reg;
-
-	if (in_out == 1) {
-		reg = get_in_reg(irn, pos);
-	}
-	else {
-		reg = get_out_reg(irn, pos);
-	}
-
-	return arch_register_get_index(reg);
-}
-
-/**
- * Returns the name of the in register at position pos.
- */
-const char *get_mips_reg_name(ir_node *irn, int pos, int in_out)
-{
-	const arch_register_t *reg;
-
-	if (in_out == 1) {
-		reg = get_in_reg(irn, pos);
-	}
-	else {
-		reg = get_out_reg(irn, pos);
-	}
-
-	return arch_register_get_name(reg);
-}
-
-/**
- * Get the register name for a node.
- */
-static int mips_get_reg_name(lc_appendable_t *app,
-    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
-{
-	const char *buf;
-	int res;
-	ir_node    *X  = arg->v_ptr;
-	int         nr = occ->width - 1;
-
-	if (!X)
-		return lc_arg_append(app, occ, "(null)", 6);
-
-	if (occ->conversion == 'S') {
-		buf = get_mips_reg_name(X, nr, 1);
-	}
-	else { /* 'D' */
-		buf = get_mips_reg_name(X, nr, 0);
-	}
-
-	res = lc_appendable_chadd(app, '$');
-	res += lc_appendable_snadd(app, buf, strlen(buf));
-	return res;
-}
-
-/**
- * Returns the tarval or offset of an mips node as a string.
- */
-static int mips_const_to_str(lc_appendable_t *app,
-    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
-{
-	const char *buf;
-	ir_node    *X = arg->v_ptr;
-
-	if (!X)
-		return lc_arg_append(app, occ, "(null)", 6);
-
-	if (occ->conversion == 'C') {
-		buf = node_const_to_str(X);
-	}
-	else { /* 'O' */
-		buf = node_offset_to_str(X);
-	}
-
-	return lc_arg_append(app, occ, buf, strlen(buf));
-}
-
-/**
- * Determines the SSE suffix depending on the mode.
- */
-static int mips_get_mode_suffix(lc_appendable_t *app,
-    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
-{
-	ir_node *X = arg->v_ptr;
-
-	if (!X)
-		return lc_arg_append(app, occ, "(null)", 6);
-
-	if (get_mode_size_bits(get_irn_mode(X)) == 32)
-		return lc_appendable_chadd(app, 's');
-	else
-		return lc_appendable_chadd(app, 'd');
 }
 
 /**
- * Return the mips printf arg environment.
- * We use the firm environment with some additional handlers.
+ * Emit the name of the destination register at given output position.
  */
-const lc_arg_env_t *mips_get_arg_env(void)
+void mips_emit_source_register_or_immediate(mips_emit_env_t *env,
+                                            const ir_node *node, int pos)
 {
-	static lc_arg_env_t *env = NULL;
-
-	static const lc_arg_handler_t mips_reg_handler   = { mips_get_arg_type, mips_get_reg_name };
-	static const lc_arg_handler_t mips_const_handler = { mips_get_arg_type, mips_const_to_str };
-	static const lc_arg_handler_t mips_mode_handler  = { mips_get_arg_type, mips_get_mode_suffix };
-
-	if(env == NULL) {
-		/* extend the firm printer */
-		env = firm_get_arg_env();
-			//lc_arg_new_env();
-
-		lc_arg_register(env, "mips:sreg", 'S', &mips_reg_handler);
-		lc_arg_register(env, "mips:dreg", 'D', &mips_reg_handler);
-		lc_arg_register(env, "mips:cnst", 'C', &mips_const_handler);
-		lc_arg_register(env, "mips:offs", 'O', &mips_const_handler);
-		lc_arg_register(env, "mips:mode", 'M', &mips_mode_handler);
+	const ir_node *op = get_irn_n(node, pos);
+	if(is_mips_Immediate(op)) {
+		mips_emit_immediate(env, op);
+	} else {
+		mips_emit_source_register(env, node, pos);
 	}
-
-	return env;
 }
 
+#if 0
 /*
  * Add a number to a prefix. This number will not be used a second time.
  */
@@ -331,110 +302,114 @@ static char *get_unique_label(char *buf, size_t buflen, const char *prefix)
 	snprintf(buf, buflen, "%s%lu", prefix, ++id);
 	return buf;
 }
-
-
-/**
- * Returns the target label for a control flow node.
- */
-static char *get_cfop_target(const ir_node *irn, char *buf)
-{
-	ir_node *bl = get_irn_link(irn);
-
-	snprintf(buf, SNPRINTF_BUF_LEN, "BLOCK_%ld", get_irn_node_nr(bl));
-	return buf;
-}
+#endif
 
 /************************************************************************/
-/* ABI Handling
+/* ABI Handling                                                         */
 /************************************************************************/
 
-static void mips_emit_IncSP(const ir_node *node, mips_emit_env_t *env)
+static
+void mips_emit_IncSP(mips_emit_env_t *env, const ir_node *node)
 {
-	FILE *F = env->out;
-	int offset = be_get_IncSP_offset(node);
-	if(offset == 0)
+	int   offset = be_get_IncSP_offset(node);
+
+	if(offset == 0) {
+		be_emit_cstring(env->emit, "\t/* omitted IncSP with 0 */");
+		be_emit_finish_line_gas(env->emit, node);
 		return;
+	}
 
-	if(be_get_IncSP_direction(node) != be_stack_dir_expand)
-		offset = -offset;
+	if(offset > 0xffff || offset < -0xffff) {
+		panic("stackframe > 2^16 bytes not supported yet\n");
+	}
 
-	fprintf(F, "\taddi $sp, $sp, %d\n", -offset);
+	if(offset > 0) {
+		be_emit_irprintf(env->emit, "\tsubu $sp, $sp, %d", offset);
+	} else {
+		be_emit_irprintf(env->emit, "\taddu $sp, $sp, %d", -offset);
+	}
+	be_emit_finish_line_gas(env->emit, node);
 }
 
-static void mips_emit_Copy(const ir_node *node, mips_emit_env_t *env)
+static void mips_emit_Copy(mips_emit_env_t *env, const ir_node *node)
 {
-	FILE *F = env->out;
-
-	lc_efprintf(mips_get_arg_env(), F, "\tor %1D, $zero, %1S\t\t\t# copy\n", node, node);
+	be_emit_cstring(env->emit, "\tmove ");
+	mips_emit_dest_register(env, node, 0);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_finish_line_gas(env->emit, node);
 }
 
-static void mips_emit_Return(const ir_node* node, mips_emit_env_t *env)
+static void mips_emit_Return(mips_emit_env_t *env, const ir_node* node)
 {
-	FILE *F = env->out;
-	fprintf(F, "\tj $ra\t\t\t\t# return\n");
+	be_emit_cstring(env->emit, "\tj $ra");
+	be_emit_finish_line_gas(env->emit, node);
 }
 
-static void mips_emit_nops(FILE* F, int n)
+static __attribute__((unused))
+void mips_emit_nops(mips_emit_env_t *env, int n)
 {
 	int i;
 
 	for(i = 0; i < n; ++i) {
-		fprintf(F, "\tnop\n");
+		be_emit_cstring(env->emit, "\tnop\n");
+		be_emit_write_line(env->emit);
 	}
 }
 
-static void mips_emit_Perm(const ir_node *node, mips_emit_env_t *env)
+static void mips_emit_Perm(mips_emit_env_t *env, const ir_node *node)
 {
-	FILE* F = env->out;
+	assert(get_irn_arity(node) == 2);
 
-	assert(/*get_irn_n_outs(node) == 2 &&*/ get_irn_arity(node) == 2);
+	be_emit_cstring(env->emit, "\txor ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 1);
+	be_emit_finish_line_gas(env->emit, node);
 
-	lc_efprintf(mips_get_arg_env(), F, "\txor %1S, %1S, %2S\t\t\t# perm\n", node, node, node);
-	mips_emit_nops(F, 3);
-	lc_efprintf(mips_get_arg_env(), F, "\txor %2S, %2S, %1S\n", node, node, node);
-	mips_emit_nops(F, 3);
-	lc_efprintf(mips_get_arg_env(), F, "\txor %1S, %1S, %2S\n", node, node, node);
-	mips_emit_nops(F, 3);
-}
+	/* mips_emit_nops(env, 3); */
 
-static void mips_emit_Spill(const ir_node* node, mips_emit_env_t *env)
-{
-	FILE* F = env->out;
+	be_emit_cstring(env->emit, "\txor ");
+	mips_emit_source_register(env, node, 1);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 1);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_finish_line_gas(env->emit, node);
 
-	ir_node* context = be_get_Spill_context(node);
-	entity* ent = be_get_spill_entity(node);
-	lc_efprintf(mips_get_arg_env(), F, "\tsw %1S, %d($fp)\n", node, get_entity_offset_bytes(ent));
-}
+	/* mips_emit_nops(env, 3); */
 
-static void mips_emit_Reload(const ir_node* node, mips_emit_env_t *env)
-{
-	FILE* F = env->out;
+	be_emit_cstring(env->emit, "\txor ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 0);
+	be_emit_cstring(env->emit, ", ");
+	mips_emit_source_register(env, node, 1);
+	be_emit_finish_line_gas(env->emit, node);
 
-	entity* ent = be_get_spill_entity(node);
-	lc_efprintf(mips_get_arg_env(), F, "\tlw %1D, %d($fp)\n", node, get_entity_offset_bytes(ent));
+	/* mips_emit_nops(env, 3); */
 }
 
 /************************************************************************/
-/* Calls
+/* Calls                                                                */
 /************************************************************************/
 
-static void mips_emit_Call(ir_node *node, mips_emit_env_t *env)
+static void mips_emit_Call(mips_emit_env_t *env, const ir_node *node)
 {
-	FILE *F = env->out;
-	const arch_register_t *callee_reg;
+	ir_entity *callee;
+
+	be_emit_cstring(env->emit, "\tjal ");
 
-	// call to imediate value (label)
-	entity *callee = be_Call_get_entity(node);
+	/* call of immediate value (label) */
+	callee = be_Call_get_entity(node);
 	if(callee != NULL) {
-		fprintf(F, "\tjal %s\n", get_entity_name(callee));
-		return;
+		be_emit_ident(env->emit, get_entity_ld_ident(callee));
+	} else {
+		mips_emit_source_register(env, node, be_pos_Call_ptr);
 	}
-
-	// call to function pointer
-	callee_reg = get_in_reg(node, be_pos_Call_ptr);
-	assert(callee_reg != NULL);
-
-	fprintf(F, "\tjal %s\n", arch_register_get_name(callee_reg));
+	be_emit_finish_line_gas(env->emit, node);
 }
 
 /************************************************************************
@@ -454,17 +429,33 @@ const char* mips_get_block_label(const ir_node* block)
 	return buf;
 }
 
-static void mips_emit_Jump(ir_node *node, mips_emit_env_t *env)
+/**
+ * Emits a block label from the given block.
+ */
+static
+void mips_emit_block_label(mips_emit_env_t *env, const ir_node *block)
 {
-	FILE *F = env->out;
-	const ir_node *block = get_irn_link(node);
+	if (has_Block_label(block)) {
+		be_emit_string(env, be_gas_label_prefix());
+		be_emit_irprintf(env->emit, "%lu", get_Block_label(block));
+	} else {
+		be_emit_cstring(env, BLOCK_PREFIX);
+		be_emit_irprintf(env->emit, "%d", get_irn_node_nr(block));
 
+	}
+}
+
+static void mips_emit_Jump(mips_emit_env_t *env, const ir_node *node)
+{
+	const ir_node *block = get_irn_link(node);
 	assert(is_Block(block));
 
-	fprintf(F, "\tb %s\n", mips_get_block_label(block));
+	be_emit_cstring(env->emit, "\tb ");
+	mips_emit_block_label(env, block);
+	be_emit_finish_line_gas(env->emit, node);
 }
 
-ir_node *mips_get_jump_block(const ir_node* node, int projn)
+ir_node *mips_get_jump_block(const ir_node* node, long projn)
 {
 	const ir_edge_t *oute;
 	for(oute = get_irn_out_edge_first(node); oute != NULL;
@@ -481,16 +472,45 @@ ir_node *mips_get_jump_block(const ir_node* node, int projn)
 	return NULL;
 }
 
+void mips_emit_jump_target_proj(mips_emit_env_t *env, const ir_node *node,
+                                long projn)
+{
+	ir_node *jumpblock = mips_get_jump_block(node, projn);
+	assert(jumpblock != NULL);
+
+	mips_emit_block_label(env, jumpblock);
+}
+
+void mips_emit_jump_target(mips_emit_env_t *env, const ir_node *node)
+{
+	ir_node *jumpblock = get_irn_link(node);
+	assert(jumpblock != NULL);
+
+	mips_emit_block_label(env, jumpblock);
+}
+
+void mips_emit_jump_or_fallthrough(mips_emit_env_t *env, const ir_node *node,
+                                   long pn)
+{
+	ir_node *jumpblock = mips_get_jump_block(node, pn);
+	assert(jumpblock != NULL);
+
+	/* TODO: use fallthrough when possible */
+	be_emit_cstring(env->emit, "b ");
+	mips_emit_block_label(env, jumpblock);
+}
+
 /************************************************************************
- *  ____          _ _       _         _									*
- * / ___|_      _(_) |_ ___| |__     | |_   _ _ __ ___  _ __			*
- * \___ \ \ /\ / / | __/ __| '_ \ _  | | | | | '_ ` _ \| '_ \			*
- *  ___) \ V  V /| | || (__| | | | |_| | |_| | | | | | | |_) |			*
- * |____/ \_/\_/ |_|\__\___|_| |_|\___/ \__,_|_| |_| |_| .__/			*
- *                                                     |_|				*
+ *  ____          _ _       _         _                                 *
+ * / ___|_      _(_) |_ ___| |__     | |_   _ _ __ ___  _ __            *
+ * \___ \ \ /\ / / | __/ __| '_ \ _  | | | | | '_ ` _ \| '_ \           *
+ *  ___) \ V  V /| | || (__| | | | |_| | |_| | | | | | | |_) |          *
+ * |____/ \_/\_/ |_|\__\___|_| |_|\___/ \__,_|_| |_| |_| .__/           *
+ *                                                     |_|              *
  *                                                                      *
  ************************************************************************/
 
+#if 0
 /* jump table entry (target and corresponding number) */
 typedef struct _branch_t {
 	ir_node *target;
@@ -510,7 +530,8 @@ typedef struct _jmp_tbl_t {
 /**
  * Compare two variables of type branch_t. Used to sort all switch cases
  */
-static int mips_cmp_branch_t(const void *a, const void *b) {
+static int mips_cmp_branch_t(const void *a, const void *b)
+{
 	branch_t *b1 = (branch_t *)a;
 	branch_t *b2 = (branch_t *)b;
 
@@ -532,16 +553,12 @@ const char* mips_get_jumptbl_label(const ir_node* switchjmp)
  * Emits code for a SwitchJmp (creates a jump table if
  * possible otherwise a cmp-jmp cascade). Stolen from ia32
  */
-void emit_mips_jump_table(const ir_node *irn, FILE* F) {
-	int                 lastval, i, pn, do_jmp_tbl = 1;
-	jmp_tbl_t           tbl;
-	ir_node            *proj;
-	const ir_edge_t    *edge;
-	const lc_arg_env_t *env = mips_get_arg_env();
-	mips_attr_t *attr;
-	int i2;
-
-	attr = get_mips_attr(irn);
+void emit_mips_jump_table(mips_emit_env_t *env, const ir_node *irn) {
+	int                lastval, i, i2, pn;
+	jmp_tbl_t          tbl;
+	ir_node           *proj;
+	const ir_edge_t   *edge;
+	const mips_attr_t *attr = get_mips_attr_const(irn);
 
 	/* fill the table structure */
 	tbl.label        = xmalloc(SNPRINTF_BUF_LEN);
@@ -573,17 +590,26 @@ void emit_mips_jump_table(const ir_node *irn, FILE* F) {
 	/* sort the branches by their number */
 	qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), mips_cmp_branch_t);
 
-	fprintf(F, "%s:\n", mips_get_jumptbl_label(irn));
+	be_emit_string(env->emit, mips_get_jumptbl_label(irn));
+	be_emit_cstring(env->emit, ":\n");
+	be_emit_write_line(env->emit);
 	lastval = tbl.min_value;
 	for(i = 0; i < tbl.num_branches; ++i) {
 		const branch_t *branch = &tbl.branches[i];
 		int value = branch->value;
 
 		for(i2 = lastval + 1; i2 < value; ++i2) {
-			fprintf(F, "\t.word %s\n", get_id_str(attr->symconst_id));
+			be_emit_cstring(env->emit, "\t.word ");
+			be_emit_ident(env->emit, get_entity_ld_ident(attr->symconst));
+			be_emit_char(env->emit, '\n');
+			be_emit_write_line(env->emit);
 		}
 
-		fprintf(F, "\t.word %s\n", mips_get_block_label(branch->target));
+		be_emit_cstring(env->emit, "\t.word ");
+		mips_emit_block_label(env, branch->target);
+		be_emit_char(env->emit, '\n');
+		be_emit_write_line(env->emit);
+
 		lastval = branch->value;
 	}
 
@@ -593,17 +619,23 @@ void emit_mips_jump_table(const ir_node *irn, FILE* F) {
 		free(tbl.branches);
 }
 
-static void dump_jump_tables(ir_node* node, void *env)
+static
+void dump_jump_tables(ir_node* node, void *data)
 {
-	FILE* F = (FILE*) env;
+	mips_emit_env_t *env = data;
 
 	// emit jump tables
 	if(is_mips_SwitchJump(node)) {
-		fprintf(F, ".data\n");
-		emit_mips_jump_table(node, F);
-		fprintf(F, ".text\n");
+		be_emit_cstring(env->emit, ".data\n");
+		be_emit_write_line(env->emit);
+
+		emit_mips_jump_table(env, node);
+
+		be_emit_cstring(env->emit, ".text\n");
+		be_emit_write_line(env->emit);
 	}
 }
+#endif
 
 /***********************************************************************************
  *                  _          __                                             _
@@ -615,20 +647,34 @@ static void dump_jump_tables(ir_node* node, void *env)
  *
  ***********************************************************************************/
 
-static void mips_emit_nothing(ir_mode *mode, mips_emit_env_t *env)
+static void mips_emit_nothing(mips_emit_env_t *env, const ir_node *node)
 {
+	(void) env;
+	(void) node;
 }
 
-static void mips_emit_this_shouldnt_happen(ir_mode *mode, mips_emit_env_t *env)
+static void mips_emit_this_shouldnt_happen(mips_emit_env_t *env, const ir_node *node)
 {
-	assert(0);
+	(void) env;
+	panic("Found non-lowered node %+F while emitting", node);
+}
+
+/**
+ * The type of a emitter function.
+ */
+typedef void (*emit_func) (mips_emit_env_t *, const ir_node *);
+
+/**
+ * Set a node emitter. Make it a bit more type safe.
+ */
+static void register_emitter(ir_op *op, emit_func func) {
+	op->ops.generic = (op_func) func;
 }
 
 /**
  * Register emitter functions for mips backend
  */
-void mips_register_emitters(void)
-{
+void mips_register_emitters(void) {
 	/* first clear the generic function pointer for all ops */
 	clear_irp_opcodes_generic_func();
 
@@ -636,49 +682,41 @@ void mips_register_emitters(void)
 	mips_register_spec_emitters();
 
 	/* benode emitter */
-	op_be_IncSP->ops.generic = (op_func) mips_emit_IncSP;
-	op_be_SetSP->ops.generic = (op_func) mips_emit_this_shouldnt_happen;
-	op_be_AddSP->ops.generic = (op_func) mips_emit_this_shouldnt_happen;
-	op_be_Call->ops.generic = (op_func) mips_emit_Call;
-	op_be_Keep->ops.generic = (op_func) mips_emit_nothing;
-	op_be_Copy->ops.generic = (op_func) mips_emit_Copy;
-	op_be_Return->ops.generic = (op_func) mips_emit_Return;
-	op_be_RegParams->ops.generic = (op_func) mips_emit_nothing;
-	op_be_Spill->ops.generic = (op_func) mips_emit_Spill;
-	op_be_Reload->ops.generic = (op_func) mips_emit_Reload;
-
-	op_Start->ops.generic = (op_func) mips_emit_nothing;
-	op_Proj->ops.generic = (op_func) mips_emit_nothing;
-	op_SymConst->ops.generic = (op_func) mips_emit_nothing;
-	op_Jmp->ops.generic = (op_func) mips_emit_Jump;
-	op_Cmp->ops.generic = (op_func) mips_emit_this_shouldnt_happen;
-	op_Cond->ops.generic = (op_func) mips_emit_this_shouldnt_happen;
-}
-
-typedef void (*emit_func) (const ir_node *, mips_emit_env_t *);
+	register_emitter(op_be_IncSP, mips_emit_IncSP);
+	register_emitter(op_be_SetSP, mips_emit_this_shouldnt_happen);
+	register_emitter(op_be_AddSP, mips_emit_this_shouldnt_happen);
+	register_emitter(op_be_Call, mips_emit_Call);
+	register_emitter(op_be_Copy, mips_emit_Copy);
+	register_emitter(op_be_Keep, mips_emit_nothing);
+	register_emitter(op_be_Barrier, mips_emit_nothing);
+	register_emitter(op_be_Return, mips_emit_Return);
+	register_emitter(op_be_RegParams, mips_emit_nothing);
+	register_emitter(op_be_Spill, mips_emit_this_shouldnt_happen);
+	register_emitter(op_be_Reload, mips_emit_this_shouldnt_happen);
+	register_emitter(op_be_Perm, mips_emit_Perm);
+
+	register_emitter(op_Start, mips_emit_nothing);
+	register_emitter(op_Proj, mips_emit_nothing);
+	register_emitter(op_SymConst, mips_emit_this_shouldnt_happen);
+	register_emitter(op_Const, mips_emit_this_shouldnt_happen);
+	register_emitter(op_Jmp, mips_emit_Jump);
+	register_emitter(op_Cmp, mips_emit_this_shouldnt_happen);
+	register_emitter(op_Cond, mips_emit_this_shouldnt_happen);
+	register_emitter(op_Phi, mips_emit_nothing);
+}
 
 /**
  * Emits assembly for a single node
  */
-static void mips_emit_node(ir_node *irn, mips_emit_env_t* env)
+static void mips_emit_node(mips_emit_env_t *env, const ir_node *node)
 {
-	mips_emit_env_t        *emit_env = env;
-	firm_dbg_module_t *mod      = emit_env->mod;
-	FILE              *F        = emit_env->out;
-	ir_op             *op       = get_irn_op(irn);
-
-	DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
+	ir_op *op = get_irn_op(node);
 
 	if (op->ops.generic) {
 		emit_func emit = (emit_func) op->ops.generic;
-		(*emit) (irn, env);
-
-#if 0
-		if(emit != (emit_func) mips_emit_nothing)
-			mips_emit_nops(F, 5);
-#endif
+		(*emit) (env, node);
 	} else {
-		ir_fprintf(F, "\t\t\t\t\t# %+F\n", irn);
+		panic("No emitter defined for node %+F", node);
 	}
 }
 
@@ -686,55 +724,82 @@ static void mips_emit_node(ir_node *irn, mips_emit_env_t* env)
  * Walks over the nodes in a block connected by scheduling edges
  * and emits code for each node.
  */
-void mips_gen_block(ir_node *block, void *env)
+void mips_gen_block(mips_emit_env_t *env, ir_node *block)
 {
-	FILE *F = ((mips_emit_env_t *)env)->out;
-	ir_node *irn;
+	ir_node *node;
 
 	if (! is_Block(block))
 		return;
 
-	fprintf(F, "%s:\n", mips_get_block_label(block));
-	sched_foreach(block, irn) {
-		mips_emit_node(irn, env);
+	mips_emit_block_label(env, block);
+	be_emit_cstring(env->emit, ":\n");
+	be_emit_write_line(env->emit);
+
+	sched_foreach(block, node) {
+		mips_emit_node(env, node);
 	}
-	fprintf(F, "\n");
+
+	be_emit_char(env->emit, '\n');
+	be_emit_write_line(env->emit);
 }
 
 /**
  * Emits code for function start.
  */
-void mips_emit_start(FILE *F, ir_graph *irg)
+void mips_emit_func_prolog(mips_emit_env_t *env, ir_graph *irg)
 {
-	const char *irg_name = get_entity_name(get_irg_entity(irg));
+	ident *irg_ident = get_entity_ld_ident(get_irg_entity(irg));
+	be_emit_env_t *eenv = env->emit;
 
 	// dump jump tables
-	irg_walk_graph(irg, NULL, dump_jump_tables, F);
+	//irg_walk_graph(irg, NULL, dump_jump_tables, env);
+
+	be_emit_write_line(eenv);
+	be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
+
+	be_emit_cstring(eenv, "\t.balign\t4\n");
+
+	be_emit_cstring(eenv, "\t.global\t");
+	be_emit_ident(eenv, irg_ident);
+	be_emit_char(eenv, '\n');
+
+	be_emit_cstring(eenv, "\t.set\tnomips16\n");
 
-	fprintf(F, "\n\n");
-	fprintf(F, "# Function Start of %s\n", irg_name);
-	fprintf(F, "%s:\n", irg_name);
+	be_emit_cstring(eenv, "\t.ent\t");
+	be_emit_ident(eenv, irg_ident);
+	be_emit_char(eenv, '\n');
+
+	be_emit_ident(eenv, irg_ident);
+	be_emit_cstring(eenv, ":\n");
+
+	be_emit_cstring(eenv, "\t.frame\t$fp, 24, $ra\n");
+	be_emit_cstring(eenv, "\t.mask\t0xc0000000, -4\n");
+	be_emit_cstring(eenv, "\t.fmask\t0x00000000, 0\n");
+
+	be_emit_write_line(eenv);
 }
 
 /**
  * Emits code for function end
  */
-void mips_emit_end(FILE *F, ir_graph *irg)
+void mips_emit_func_epilog(mips_emit_env_t *env, ir_graph *irg)
 {
-	const char *irg_name = get_entity_name(get_irg_entity(irg));
+	ident *irg_ident = get_entity_ident(get_irg_entity(irg));
 
-	fprintf(F, "# End of function %s we should never get here...\n", irg_name);
-	fprintf(F, "\tjal exit\n");
+	be_emit_cstring(env->emit, "\t.end\t");
+	be_emit_ident(env->emit, irg_ident);
+	be_emit_char(env->emit, '\n');
+	be_emit_write_line(env->emit);
 }
 
 /**
  * Sets labels for control flow nodes (jump target)
- * TODO: Jump optimization
  */
 void mips_gen_labels(ir_node *block, void *env)
 {
 	ir_node *pred;
 	int n = get_Block_n_cfgpreds(block);
+	(void) env;
 
 	for (n--; n >= 0; n--) {
 		pred = get_Block_cfgpred(block, n);
@@ -745,29 +810,33 @@ void mips_gen_labels(ir_node *block, void *env)
 /**
  * Main driver
  */
-void mips_gen_routine(FILE *F, ir_graph *irg, const mips_code_gen_t *cg)
+void mips_gen_routine(mips_code_gen_t *cg, ir_graph *irg)
 {
-	mips_emit_env_t emit_env;
+	mips_emit_env_t  env;
 	int i, n;
 
-	emit_env.mod      = firm_dbg_register("firm.be.mips.emit");
-	emit_env.out      = F;
-	emit_env.arch_env = cg->arch_env;
-	emit_env.cg       = cg;
+	env.isa      = (mips_isa_t*) cg->arch_env->isa;
+	env.emit     = &env.isa->emit;
+	env.arch_env = cg->arch_env;
+	env.cg       = cg;
+
+	mips_register_emitters();
 
-	/* set the global arch_env (needed by print hooks) */
-	arch_env = cg->arch_env;
+	irg_block_walk_graph(irg, mips_gen_labels, NULL, &env);
 
-	irg_block_walk_graph(irg, mips_gen_labels, NULL, &emit_env);
-	mips_emit_start(F, irg);
-//	irg_walk_blkwise_graph(irg, NULL, mips_gen_block, &emit_env);
+	mips_emit_func_prolog(&env, irg);
 
 	dump_ir_block_graph_sched(irg, "-kaputtelist");
 
 	for (i = 0, n = mips_get_sched_n_blocks(cg); i < n; ++i) {
 		ir_node *block = mips_get_sched_block(cg, i);
-		mips_gen_block(block, &emit_env);
+		mips_gen_block(&env, block);
 	}
 
-	mips_emit_end(F, irg);
+	mips_emit_func_epilog(&env, irg);
+}
+
+void mips_init_emitter(void)
+{
+	FIRM_DBG_REGISTER(dbg, "firm.be.mips.emitter");
 }