/**
* @file
* @brief emit assembler for a backend graph
- * @version $Id$
*/
#include "config.h"
#include "irargs_t.h"
#include "irprog.h"
-#include "../besched.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"
#define SNPRINTF_BUF_LEN 128
-/**
- * Returns the register at in position pos.
- */
-static const arch_register_t *get_in_reg(const ir_node *node, int pos)
+void TEMPLATE_emit_immediate(const ir_node *node)
{
- ir_node *op;
- const arch_register_t *reg = NULL;
-
- assert(get_irn_arity(node) > pos && "Invalid IN position");
+ const TEMPLATE_attr_t *attr = get_TEMPLATE_attr_const(node);
+ be_emit_tarval(attr->value);
+}
- /* The out register of the operator at position pos is the
- in register we need. */
- op = get_irn_n(node, pos);
+static void emit_register(const arch_register_t *reg)
+{
+ be_emit_string(arch_register_get_name(reg));
+}
- reg = arch_get_irn_register(op);
+void TEMPLATE_emit_source_register(const ir_node *node, int pos)
+{
+ const arch_register_t *reg = arch_get_irn_register_in(node, pos);
+ emit_register(reg);
+}
- assert(reg && "no in register found");
- return reg;
+void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
+{
+ const arch_register_t *reg = arch_get_irn_register_out(node, pos);
+ emit_register(reg);
}
/**
- * Returns the register at out position pos.
+ * Returns the target label for a control flow node.
*/
-static const arch_register_t *get_out_reg(const ir_node *node, int pos)
+static void TEMPLATE_emit_cfop_target(const ir_node *node)
{
- 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(node);
- } else if (is_TEMPLATE_irn(node)) {
- reg = arch_irn_get_register(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(proj);
- break;
- }
- }
- }
-
- assert(reg && "no out register found");
- return reg;
+ ir_node *block = (ir_node*)get_irn_link(node);
+ be_gas_emit_block_name(block);
}
-/*************************************************************
- * _ _ __ _ _
- * (_) | | / _| | | | |
- * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
- * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
- * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
- * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
- * | | | |
- * |_| |_|
- *************************************************************/
-void TEMPLATE_emit_immediate(const ir_node *node)
+
+/**
+ * Emits code for a unconditional jump.
+ */
+static void emit_TEMPLATE_Jmp(const ir_node *node)
{
- (void) node;
- /* TODO */
+ be_emit_cstring("\tjmp ");
+ TEMPLATE_emit_cfop_target(node);
+ be_emit_finish_line_gas(node);
}
-void TEMPLATE_emit_source_register(const ir_node *node, int pos)
+static void emit_be_IncSP(const ir_node *node)
{
- const arch_register_t *reg = get_in_reg(node, pos);
- be_emit_string(arch_register_get_name(reg));
+ int offset = be_get_IncSP_offset(node);
+
+ if (offset == 0)
+ return;
+
+ /* downwards growing stack */
+ if (offset > 0) {
+ be_emit_cstring("\tsub ");
+ } else {
+ be_emit_cstring("\tadd ");
+ offset = -offset;
+ }
+
+ TEMPLATE_emit_source_register(node, 0);
+ be_emit_irprintf(", %d, ", offset);
+ TEMPLATE_emit_dest_register(node, 0);
+ be_emit_finish_line_gas(node);
}
-void TEMPLATE_emit_dest_register(const ir_node *node, int pos)
+static void emit_be_Start(const ir_node *node)
{
- const arch_register_t *reg = get_out_reg(node, pos);
- be_emit_string(arch_register_get_name(reg));
+ 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);
+ }
}
-/**
- * Returns the target label for a control flow node.
- */
-static void TEMPLATE_emit_cfop_target(const ir_node *node) {
- ir_node *block = get_irn_link(node);
+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);
+ }
- be_emit_irprintf("BLOCK_%ld", get_irn_node_nr(block));
+ /* return */
+ be_emit_cstring("\tret");
+ be_emit_finish_line_gas(node);
}
-/***********************************************************************************
- * _ __ _
- * (_) / _| | |
- * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
- * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
- * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
- * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
- *
- ***********************************************************************************/
+static void emit_nothing(const ir_node *node)
+{
+ (void) node;
+}
/**
- * Emits code for a unconditional jump.
+ * The type of a emitter function.
*/
-static void emit_Jmp(const ir_node *node) {
- ir_node *block;
-
- /* for now, the code works for scheduled and non-schedules blocks */
- block = get_nodes_block(node);
+typedef void (emit_func)(const ir_node *node);
- be_emit_cstring("\tjmp ");
- TEMPLATE_emit_cfop_target(node);
- be_emit_finish_line_gas(node);
+static inline void set_emitter(ir_op *op, emit_func func)
+{
+ op->ops.generic = (op_func)func;
}
/**
* Enters the emitter functions for handled nodes into the generic
* pointer of an opcode.
*/
-static void TEMPLATE_register_emitters(void) {
-
-/* some convienience macros to register additional emitter functions
- (other than the generated ones) */
-#define TEMPLATE_EMIT(a) op_TEMPLATE_##a->ops.generic = (op_func)emit_TEMPLATE_##a
-#define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
-#define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
-
+static void TEMPLATE_register_emitters(void)
+{
/* first clear the generic function pointer for all ops */
- clear_irp_opcodes_generic_func();
+ ir_clear_opcodes_generic_func();
/* register all emitter functions defined in spec */
TEMPLATE_register_spec_emitters();
- /* register addtional emitter functions if needed */
- EMIT(Jmp);
+ /* 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);
-#undef TEMPLATE_EMIT
-#undef BE_EMIT
-#undef EMIT
+ /* no need to emit anything for the following nodes */
+ set_emitter(op_Phi, emit_nothing);
+ set_emitter(op_be_Keep, emit_nothing);
}
typedef void (*emit_func_ptr) (const ir_node *);
/**
* Emits code for a node.
*/
-void TEMPLATE_emit_node(const ir_node *node) {
+static void TEMPLATE_emit_node(const ir_node *node)
+{
ir_op *op = get_irn_op(node);
if (op->ops.generic) {
* 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 *data) {
+static void TEMPLATE_emit_block(ir_node *block)
+{
ir_node *node;
- (void) data;
- if (! is_Block(block))
- return;
-
- be_emit_cstring("BLOCK_");
- be_emit_irprintf("%ld:\n", get_irn_node_nr(block));
+ be_gas_emit_block_name(block);
+ be_emit_cstring(":\n");
be_emit_write_line();
sched_foreach(block, node) {
}
}
-
-/**
- * Emits code for function start.
- */
-void TEMPLATE_emit_func_prolog(ir_graph *irg) {
- const char *irg_name = get_entity_name(get_irg_entity(irg));
-
- /* TODO: emit function header */
- be_emit_cstring("/* start of ");
- be_emit_string(irg_name);
- be_emit_cstring(" */\n");
- be_emit_write_line();
-}
-
-/**
- * Emits code for function end
- */
-void TEMPLATE_emit_func_epilog(ir_graph *irg) {
- const char *irg_name = get_entity_name(get_irg_entity(irg));
-
- /* TODO: emit function end */
- be_emit_cstring("/* end of ");
- be_emit_string(irg_name);
- be_emit_cstring(" */\n");
- be_emit_write_line();
-}
-
/**
* 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;
/**
* Main driver
*/
-void TEMPLATE_gen_routine(const TEMPLATE_code_gen_t *cg, ir_graph *irg)
+void TEMPLATE_emit_routine(ir_graph *irg)
{
- (void)cg;
+ ir_node **block_schedule;
+ ir_entity *entity = get_irg_entity(irg);
+ size_t i;
+ size_t n;
/* register all emitter functions */
TEMPLATE_register_emitters();
- TEMPLATE_emit_func_prolog(irg);
+ /* create the block schedule */
+ block_schedule = be_create_block_schedule(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);
- irg_walk_blkwise_graph(irg, NULL, TEMPLATE_gen_block, NULL);
- TEMPLATE_emit_func_epilog(irg);
+
+ 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);
}
projects / libfirm / blobdiff