Commit 47955b0c authored by Christian Würdig's avatar Christian Würdig
Browse files

initial checkin for TEMPLATE backend

parent de6ab3f5
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <limits.h>
#include "xmalloc.h"
#include "tv.h"
#include "iredges.h"
#include "debug.h"
#include "irgwalk.h"
#include "irprintf.h"
#include "irop_t.h"
#include "irargs_t.h"
#include "../besched.h"
#include "TEMPLATE_emitter.h"
#include "gen_TEMPLATE_emitter.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) {
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;
}
/**
* Returns the register at out position pos.
*/
static const arch_register_t *get_out_reg(ir_node *irn, 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 {
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;
}
}
}
assert(reg && "no out register found");
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);
}
/**
* 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);
}
/**
* 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)
{
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);
}
lc_appendable_chadd(app, '%');
return lc_arg_append(app, occ, buf, strlen(buf));
}
/**
* Returns the tarval or offset of an ia32 as a string.
*/
static int TEMPLATE_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 TEMPLATE_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 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);
}
return env;
}
/**
* 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);
}
}
}
/*
* 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;
}
/**
* 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;
}
/*********************************************************
* _ _ _
* (_) | (_)
* ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
* / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
* | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
* \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
* _/ | | |
* |__/ |_|
*********************************************************/
/**
* Emits code for a Switch (creates a jump table if
* possible otherwise a cmp-jmp cascade).
*/
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;
}
/* check ratio of value interval to number of branches */
if (((float)(interval + 1) / (float)tbl.num_branches) > 8.0) {
do_jmp_tbl = 0;
}
if (do_jmp_tbl) {
/* TODO: emit table code */
}
else {
/* TODO: emit cmp - jmp cascade */
}
if (tbl.label)
free(tbl.label);
if (tbl.branches)
free(tbl.branches);
}
/***********************************************************************************
* _ __ _
* (_) / _| | |
* _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
* | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
* | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
* |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
*
***********************************************************************************/
/**
* 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);
ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
}
/**
* 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;
if (! is_Block(block))
return;
fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
sched_foreach(block, irn) {
TEMPLATE_emit_node(irn, env);
}
}
/**
* 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) {
ir_node *pred;
int n = get_Block_n_cfgpreds(block);
for (n--; n >= 0; n--) {
pred = get_Block_cfgpred(block, n);
set_irn_link(pred, block);
}
}
/**
* Main driver
*/
void TEMPLATE_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
emit_env_t emit_env;
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;
/* set the global arch_env (needed by print hooks) */
arch_env = cg->arch_env;
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);
}
#ifndef _TEMPLATE_EMITTER_H_
#define _TEMPLATE_EMITTER_H_
#include "irargs_t.h" // this also inlucdes <libcore/lc_print.h>
#include "irnode.h"
#include "debug.h"
#include "../bearch.h"
#include "bearch_TEMPLATE_t.h"
typedef struct _emit_env_t {
firm_dbg_module_t *mod;
FILE *out;
const arch_env_t *arch_env;
const TEMPLATE_code_gen_t *cg;
} emit_env_t;
const lc_arg_env_t *TEMPLATE_get_arg_env(void);
void equalize_dest_src(FILE *F, ir_node *n);
int get_TEMPLATE_reg_nr(ir_node *irn, int posi, int in_out);
const char *get_TEMPLATE_in_reg_name(ir_node *irn, int pos);
void TEMPLATE_gen_routine(FILE *F, ir_graph *irg, const TEMPLATE_code_gen_t *cg);
#endif /* _TEMPLATE_EMITTER_H_ */
/**
* Dumps global variables and constants as TEMPLATE assembler.
* @author Christian Wuerdig
* @date 14.02.2006
* @version $Id$
*/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include "xmalloc.h"
#include <obstack.h>
#ifdef obstack_chunk_alloc
# undef obstack_chunk_alloc
# define obstack_chunk_alloc xmalloc
#else
# define obstack_chunk_alloc xmalloc
# define obstack_chunk_free free
#endif
#include "tv.h"
#include "irnode.h"
#include "entity.h"
#include "irprog.h"
#include "TEMPLATE_gen_decls.h"
/************************************************************************/
/*
* returns the highest bit value
*/
static unsigned highest_bit(unsigned v)
{
int res = -1;
if (v >= (1U << 16U)) {
res += 16;
v >>= 16;
}
if (v >= (1U << 8U)) {
res += 8;
v >>= 8;
}
if (v >= (1U << 4U)) {
res += 4;
v >>= 4;
}
if (v >= (1U << 2U)) {
res += 2;
v >>= 2;
}
if (v >= (1U << 1U)) {
res += 1;
v >>= 1;
}
if (v >= 1)
res += 1;
return res;
}
/*
* output the alignment
*/
static void TEMPLATE_dump_align(struct obstack *obst, int align)
{
int h = highest_bit(align);
if ((1 << h) < align)
++h;
align = (1 << h);
if (align > 1)
obstack_printf(obst, "\t.align %d\n", align);
}
static void dump_arith_tarval(struct obstack *obst, tarval *tv, int bytes)
{
switch (bytes) {
case 1:
obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
break;
case 2:
obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
break;
case 4:
obstack_printf(obst, "0x%02x%02x%02x%02x",
get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
break;
case 8:
obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x",
get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
break;
case 10:
case 12:
break;
default:
fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);