-#ifdef HAVE_CONFIG_H
+/*
+ * Copyright (C) 1995-2008 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 emit assembler for a backend graph
+ * @version $Id$
+ */
#include "config.h"
-#endif
#include <limits.h>
#include "irprintf.h"
#include "irop_t.h"
#include "irargs_t.h"
+#include "irprog.h"
#include "../besched.h"
+#include "../begnuas.h"
+#include "../beblocksched.h"
+#include "../benode.h"
#include "TEMPLATE_emitter.h"
#include "gen_TEMPLATE_emitter.h"
+#include "gen_TEMPLATE_regalloc_if.h"
#include "TEMPLATE_nodes_attr.h"
#include "TEMPLATE_new_nodes.h"
-#include "TEMPLATE_map_regs.h"
#define SNPRINTF_BUF_LEN 128
-static const arch_env_t *arch_env = NULL;
-
-
-/*************************************************************
- * _ _ __ _ _
- * (_) | | / _| | | | |
- * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
- * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
- * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
- * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
- * | | | |
- * |_| |_|
- *************************************************************/
-
-/**
- * Return a const or symconst as string.
- */
-static const char *node_const_to_str(ir_node *n) {
- /* TODO */
-}
-
-/**
- * Returns node's offset as string.
- */
-static char *node_offset_to_str(ir_node *n) {
- /* TODO */
-}
-
-/* We always pass the ir_node which is a pointer. */
-static int TEMPLATE_get_arg_type(const lc_arg_occ_t *occ) {
- return lc_arg_type_ptr;
-}
-
-
/**
* Returns the register at in position pos.
*/
-static const arch_register_t *get_in_reg(ir_node *irn, int pos) {
+static const arch_register_t *get_in_reg(const ir_node *node, int pos)
+{
ir_node *op;
const arch_register_t *reg = NULL;
- assert(get_irn_arity(irn) > pos && "Invalid IN position");
+ 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(irn, pos);
+ op = get_irn_n(node, pos);
- reg = arch_get_irn_register(arch_env, op);
+ reg = arch_get_irn_register(op);
assert(reg && "no in register found");
return reg;
/**
* Returns the register at out position pos.
*/
-static const arch_register_t *get_out_reg(ir_node *irn, int pos) {
+static const arch_register_t *get_out_reg(const ir_node *node, int pos)
+{
ir_node *proj;
const arch_register_t *reg = NULL;
- assert(get_irn_n_edges(irn) > pos && "Invalid OUT position");
-
/* 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_TEMPLATE_irn(irn)) {
- reg = get_TEMPLATE_out_reg(irn, pos);
- }
- else {
+ if (get_irn_mode(node) != mode_T) {
+ reg = arch_get_irn_register(node);
+ } else if (is_TEMPLATE_irn(node)) {
+ reg = arch_irn_get_register(node, pos);
+ } else {
const ir_edge_t *edge;
- foreach_out_edge(irn, 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);
+ reg = arch_get_irn_register(proj);
break;
}
}
return reg;
}
-/**
- * Returns the number of the in register at position pos.
- */
-int get_TEMPLATE_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);
+void TEMPLATE_emit_immediate(const ir_node *node)
+{
+ const TEMPLATE_attr_t *attr = get_TEMPLATE_attr_const(node);
+ be_emit_tarval(attr->value);
}
-/**
- * Returns the name of the in register at position pos.
- */
-const char *get_TEMPLATE_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);
+static void emit_register(const arch_register_t *reg)
+{
+ be_emit_string(arch_register_get_name(reg));
}
-/**
- * Get the register name for a node.
- */
-static int TEMPLATE_get_reg_name(lc_appendable_t *app,
- const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
+void TEMPLATE_emit_source_register(const ir_node *node, int pos)
{
- const char *buf;
- 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_TEMPLATE_reg_name(X, nr, 1);
- }
- else { /* 'D' */
- buf = get_TEMPLATE_reg_name(X, nr, 0);
- }
+ const arch_register_t *reg = get_in_reg(node, pos);
+ emit_register(reg);
+}
- lc_appendable_chadd(app, '%');
- return lc_arg_append(app, occ, buf, strlen(buf));
+void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
+{
+ const arch_register_t *reg = get_out_reg(node, pos);
+ emit_register(reg);
}
/**
- * Returns the tarval or offset of an ia32 as a string.
+ * Returns the target label for a control flow node.
*/
-static int TEMPLATE_const_to_str(lc_appendable_t *app,
- const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
+static void TEMPLATE_emit_cfop_target(const ir_node *node)
{
- const char *buf;
- ir_node *X = arg->v_ptr;
+ ir_node *block = (ir_node*)get_irn_link(node);
+ be_gas_emit_block_name(block);
+}
- 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.
+ * Emits code for a unconditional jump.
*/
-static int TEMPLATE_get_mode_suffix(lc_appendable_t *app,
- const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
+static void emit_TEMPLATE_Jmp(const ir_node *node)
{
- ir_node *X = arg->v_ptr;
+ be_emit_cstring("\tjmp ");
+ TEMPLATE_emit_cfop_target(node);
+ be_emit_finish_line_gas(node);
+}
- if (!X)
- return lc_arg_append(app, occ, "(null)", 6);
+static void emit_be_IncSP(const ir_node *node)
+{
+ int offset = be_get_IncSP_offset(node);
- if (get_mode_size_bits(get_irn_mode(X)) == 32)
- return lc_appendable_chadd(app, 's');
- else
- return lc_appendable_chadd(app, 'd');
-}
+ if (offset == 0)
+ return;
-/**
- * Return the ia32 printf arg environment.
- * We use the firm environment with some additional handlers.
- */
-const lc_arg_env_t *TEMPLATE_get_arg_env(void) {
- static lc_arg_env_t *env = NULL;
-
- static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
- static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
- static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
-
- if(env == NULL) {
- /* extend the firm printer */
- env = firm_get_arg_env();
- //lc_arg_new_env();
-
- lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
- lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
- lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
- lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
- lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
+ /* downwards growing stack */
+ if (offset > 0) {
+ be_emit_cstring("\tsub ");
+ } else {
+ be_emit_cstring("\tadd ");
+ offset = -offset;
}
- return env;
+ TEMPLATE_emit_source_register(node, 0);
+ be_emit_irprintf(", %d, ", offset);
+ TEMPLATE_emit_dest_register(node, 0);
+ be_emit_finish_line_gas(node);
}
-/**
- * For 2-address code we need to make sure the first src reg is equal to dest reg.
- */
-void equalize_dest_src(FILE *F, ir_node *n) {
- if (get_ia32_reg_nr(n, 0, 1) != get_ia32_reg_nr(n, 0, 0)) {
- if (get_irn_arity(n) > 1 && get_ia32_reg_nr(n, 1, 1) == get_ia32_reg_nr(n, 0, 0)) {
- if (! is_op_commutative(get_irn_op(n))) {
- /* we only need to exchange for non-commutative ops */
- lc_efprintf(ia32_get_arg_env(), F, "\txchg %1S, %2S\t\t\t/* xchg src1 <-> src2 for 2 address code */\n", n, n);
- }
- }
- else {
- lc_efprintf(ia32_get_arg_env(), F, "\tmovl %1S, %1D\t\t\t/* src -> dest for 2 address code */\n", n, n);
- }
+static void emit_be_Start(const ir_node *node)
+{
+ ir_graph *irg = get_irn_irg(node);
+ ir_type *frame_type = get_irg_frame_type(irg);
+ unsigned size = get_type_size_bytes(frame_type);
+
+ /* emit function prolog */
+
+ /* allocate stackframe */
+ if (size > 0) {
+ be_emit_cstring("\tsub ");
+ emit_register(&TEMPLATE_registers[REG_SP]);
+ be_emit_irprintf(", %u, ", size);
+ emit_register(&TEMPLATE_registers[REG_SP]);
+ be_emit_finish_line_gas(node);
}
}
-/*
- * Add a number to a prefix. This number will not be used a second time.
- */
-char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
- static unsigned long id = 0;
- snprintf(buf, buflen, "%s%lu", prefix, ++id);
- return buf;
+static void emit_be_Return(const ir_node *node)
+{
+ ir_graph *irg = get_irn_irg(node);
+ ir_type *frame_type = get_irg_frame_type(irg);
+ unsigned size = get_type_size_bytes(frame_type);
+
+ /* emit function epilog here */
+
+ /* deallocate stackframe */
+ if (size > 0) {
+ be_emit_cstring("\tadd ");
+ emit_register(&TEMPLATE_registers[REG_SP]);
+ be_emit_irprintf(", %u, ", size);
+ emit_register(&TEMPLATE_registers[REG_SP]);
+ be_emit_finish_line_gas(node);
+ }
+
+ /* return */
+ be_emit_cstring("\tret");
+ be_emit_finish_line_gas(node);
}
+static void emit_nothing(const ir_node *node)
+{
+ (void) node;
+}
/**
- * Returns the target label for a control flow node.
+ * The type of a emitter function.
*/
-static char *get_cfop_target(const ir_node *irn, char *buf) {
- ir_node *bl = get_irn_link(irn);
+typedef void (emit_func)(const ir_node *node);
- snprintf(buf, SNPRINTF_BUF_LEN, "BLOCK_%ld", get_irn_node_nr(bl));
- return buf;
+static inline void set_emitter(ir_op *op, emit_func func)
+{
+ op->ops.generic = (op_func)func;
}
-/*********************************************************
- * _ _ _
- * (_) | (_)
- * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
- * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
- * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
- * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
- * _/ | | |
- * |__/ |_|
- *********************************************************/
-
/**
- * Emits code for a Switch (creates a jump table if
- * possible otherwise a cmp-jmp cascade).
+ * Enters the emitter functions for handled nodes into the generic
+ * pointer of an opcode.
*/
-void emit_TEMPLATE_Switch(const ir_node *irn, emit_env_t *emit_env) {
- unsigned long interval;
- jmp_tbl_t *tbl;
- ir_node **cases;
- int def_projnum;
- int do_jmp_tbl = 1;
- const lc_arg_env_t *env = ia32_get_arg_env();
- FILE *F = emit_env->out;
-
- /* TODO: */
- /* - create list of projs, each corresponding to one switch case */
- /* - determine the projnumber of the default case */
-
- tbl = create_jump_table(cases, def_projnum, "JMPTBL_");
-
- /* two-complement's magic make this work without overflow */
- interval = tbl.max_value - tbl.min_value;
-
- /* check value interval: do not create jump table if interval is too large */
- if (interval > 16 * 1024) {
- do_jmp_tbl = 0;
- }
+static void TEMPLATE_register_emitters(void)
+{
+ /* first clear the generic function pointer for all ops */
+ clear_irp_opcodes_generic_func();
- /* check ratio of value interval to number of branches */
- if (((float)(interval + 1) / (float)tbl.num_branches) > 8.0) {
- do_jmp_tbl = 0;
- }
+ /* register all emitter functions defined in spec */
+ TEMPLATE_register_spec_emitters();
- if (do_jmp_tbl) {
- /* TODO: emit table code */
- }
- else {
- /* TODO: emit cmp - jmp cascade */
- }
+ /* custom emitters not provided by the spec */
+ set_emitter(op_TEMPLATE_Jmp, emit_TEMPLATE_Jmp);
+ set_emitter(op_be_IncSP, emit_be_IncSP);
+ set_emitter(op_be_Return, emit_be_Return);
+ set_emitter(op_be_Start, emit_be_Start);
- if (tbl.label)
- free(tbl.label);
- if (tbl.branches)
- free(tbl.branches);
+ /* no need to emit anything for the following nodes */
+ set_emitter(op_Phi, emit_nothing);
+ set_emitter(op_be_Keep, emit_nothing);
}
-
-
-/***********************************************************************************
- * _ __ _
- * (_) / _| | |
- * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
- * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
- * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
- * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
- *
- ***********************************************************************************/
+typedef void (*emit_func_ptr) (const ir_node *);
/**
* Emits code for a node.
*/
-void TEMPLATE_emit_node(ir_node *irn, void *env) {
- emit_env_t *emit_env = env;
- firm_dbg_module_t *mod = emit_env->mod;
- FILE *F = emit_env->out;
-
- DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
-
-#define BE_EMIT(a) if (is_TEMPLATE_##a(irn)) { emit_TEMPLATE_##a(irn, emit_env); return; }
-
- /* generated int emitter functions */
- BE_EMIT(Copy);
- BE_EMIT(Perm);
-
- BE_EMIT(Const);
-
- BE_EMIT(Add);
- BE_EMIT(Add_i);
- BE_EMIT(Sub);
- BE_EMIT(Sub_i);
- BE_EMIT(Minus);
- BE_EMIT(Inc);
- BE_EMIT(Dec);
-
- BE_EMIT(And);
- BE_EMIT(And_i);
- BE_EMIT(Or);
- BE_EMIT(Or_i);
- BE_EMIT(Eor);
- BE_EMIT(Eor_i);
- BE_EMIT(Not);
-
- BE_EMIT(Shl);
- BE_EMIT(Shl_i);
- BE_EMIT(Shr);
- BE_EMIT(Shr_i);
- BE_EMIT(RotL);
- BE_EMIT(RotL_i);
- BE_EMIT(RotR);
-
- BE_EMIT(Mul);
- BE_EMIT(Mul_i);
-
- BE_EMIT(Store);
- BE_EMIT(Load);
-
- /* generated floating point emitter */
- BE_EMIT(fConst);
-
- BE_EMIT(fAdd);
- BE_EMIT(fSub);
- BE_EMIT(fMinus);
-
- BE_EMIT(fMul);
- BE_EMIT(fDiv);
-
- BE_EMIT(fMin);
- BE_EMIT(fMax);
-
- BE_EMIT(fLoad);
- BE_EMIT(fStore);
-
- /* other emitter functions */
-// BE_EMIT(Switch);
+static void TEMPLATE_emit_node(const ir_node *node)
+{
+ ir_op *op = get_irn_op(node);
- ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
+ if (op->ops.generic) {
+ emit_func_ptr func = (emit_func_ptr) op->ops.generic;
+ (*func) (node);
+ } else {
+ ir_fprintf(stderr, "No emitter for node %+F\n", node);
+ }
}
/**
* Walks over the nodes in a block connected by scheduling edges
* and emits code for each node.
*/
-void TEMPLATE_gen_block(ir_node *block, void *env) {
- ir_node *irn;
+static void TEMPLATE_emit_block(ir_node *block)
+{
+ ir_node *node;
- if (! is_Block(block))
- return;
+ be_gas_emit_block_name(block);
+ be_emit_cstring(":\n");
+ be_emit_write_line();
- fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
- sched_foreach(block, irn) {
- TEMPLATE_emit_node(irn, env);
+ sched_foreach(block, node) {
+ TEMPLATE_emit_node(node);
}
}
-
-/**
- * Emits code for function start.
- */
-void TEMPLATE_emit_start(FILE *F, ir_graph *irg) {
- const char *irg_name = get_entity_name(get_irg_entity(irg));
-
- /* TODO: emit function header */
-}
-
-/**
- * Emits code for function end
- */
-void TEMPLATE_emit_end(FILE *F, ir_graph *irg) {
- const char *irg_name = get_entity_name(get_irg_entity(irg));
-
- /* TODO: emit function end */
-}
-
/**
* Sets labels for control flow nodes (jump target)
- * TODO: Jump optimization
*/
-void TEMPLATE_gen_labels(ir_node *block, void *env) {
+static void TEMPLATE_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);
/**
* Main driver
*/
-void TEMPLATE_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
- emit_env_t emit_env;
+void TEMPLATE_emit_routine(ir_graph *irg)
+{
+ ir_node **block_schedule;
+ ir_entity *entity = get_irg_entity(irg);
+ size_t i;
+ size_t n;
- emit_env.mod = firm_dbg_register("firm.be.TEMPLATE.emit");
- emit_env.out = F;
- emit_env.arch_env = cg->arch_env;
- emit_env.cg = cg;
+ /* register all emitter functions */
+ TEMPLATE_register_emitters();
- /* set the global arch_env (needed by print hooks) */
- arch_env = cg->arch_env;
+ /* create the block schedule */
+ block_schedule = be_create_block_schedule(irg);
- TEMPLATE_emit_start(F, irg);
- irg_block_walk_graph(irg, TEMPLATE_gen_labels, NULL, &emit_env);
- irg_walk_blkwise_graph(irg, NULL, TEMPLATE_gen_block, &emit_env);
- TEMPLATE_emit_end(F, irg);
+ /* emit assembler prolog */
+ be_gas_emit_function_prolog(entity, 4);
+
+ /* populate jump link fields with their destinations */
+ irg_block_walk_graph(irg, TEMPLATE_gen_labels, NULL, NULL);
+
+ n = ARR_LEN(block_schedule);
+ for (i = 0; i < n; ++i) {
+ ir_node *block = block_schedule[i];
+ TEMPLATE_emit_block(block);
+ }
+ be_gas_emit_function_epilog(entity);
}
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