+#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 "irprog_t.h"
+
+#include "../besched.h"
+#include "../benode_t.h"
+
#include "ia32_emitter.h"
+#include "gen_ia32_emitter.h"
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
+#include "ia32_map_regs.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
+
+extern int obstack_printf(struct obstack *obst, char *fmt, ...);
+
+#define SNPRINTF_BUF_LEN 128
-#define TARVAL_SNPRINTF_BUF_LEN 1024
+static const arch_env_t *arch_env = NULL;
-const char *get_dest_reg_name(ir_node *n, int num) {
- return get_ia32_out_reg_name(n, --num);
+/**
+ * Emits registers and/or address mode of a binary operation.
+ */
+char *ia32_emit_binop(const ir_node *n) {
+ static char *buf = NULL;
+
+ /* verify that this function is never called on non-AM supporting operations */
+ assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
+
+ if (! buf) {
+ buf = xcalloc(1, SNPRINTF_BUF_LEN);
+ }
+ else {
+ memset(buf, 0, SNPRINTF_BUF_LEN);
+ }
+
+ switch(get_ia32_op_type(n)) {
+ case ia32_Normal:
+ if (get_ia32_cnst(n)) {
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
+ }
+ else {
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %4S", n, n);
+ }
+ break;
+ case ia32_AddrModeS:
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n));
+ break;
+ case ia32_AddrModeD:
+ if (get_ia32_cnst(n)) {
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n), get_ia32_cnst(n));
+ }
+ else {
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %3S", ia32_emit_am(n), n);
+ }
+ break;
+ default:
+ assert(0 && "unsupported op type");
+ }
+
+ return buf;
}
-const char *get_source_reg_name(ir_node *n, int num) {
- return get_ia32_in_reg_name(n, --num);
+/**
+ * Emits registers and/or address mode of a unary operation.
+ */
+char *ia32_emit_unop(const ir_node *n) {
+ static char *buf = NULL;
+
+ if (! buf) {
+ buf = xcalloc(1, SNPRINTF_BUF_LEN);
+ }
+ else {
+ memset(buf, 0, SNPRINTF_BUF_LEN);
+ }
+
+ switch(get_ia32_op_type(n)) {
+ case ia32_Normal:
+ lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
+ break;
+ case ia32_am_Dest:
+ snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n));
+ break;
+ default:
+ assert(0 && "unsupported op type");
+ }
+
+ return buf;
}
-char *node_const_to_str(ir_node *n) {
- char *buf = malloc(TARVAL_SNPRINTF_BUF_LEN);
- tarval_snprintf(buf, TARVAL_SNPRINTF_BUF_LEN, get_ia32_Immop_tarval(n));
- return buf;
+/**
+ * Emits adressmode.
+ */
+char *ia32_emit_am(const ir_node *n) {
+ ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
+ int had_output = 0;
+ char *s;
+ int size;
+ static struct obstack *obst = NULL;
+ ir_mode *mode = get_ia32_ls_mode(n);
+
+ if (! is_ia32_Lea(n))
+ assert(mode && "AM node must have ls_mode attribute set.");
+
+ if (! obst) {
+ obst = xcalloc(1, sizeof(*obst));
+ }
+ else {
+ obstack_free(obst, NULL);
+ }
+
+ /* obstack_free with NULL results in an uninitialized obstack */
+ obstack_init(obst);
+
+ if (mode) {
+ switch (get_mode_size_bits(mode)) {
+ case 8:
+ obstack_printf(obst, "BYTE PTR ");
+ break;
+ case 16:
+ obstack_printf(obst, "WORD PTR ");
+ break;
+ case 32:
+ obstack_printf(obst, "DWORD PTR ");
+ break;
+ default:
+ assert(0 && "unsupported mode size");
+ }
+ }
+
+ obstack_printf(obst, "[");
+
+ if (am_flav & ia32_B) {
+ lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
+ had_output = 1;
+ }
+
+ if (am_flav & ia32_I) {
+ if (had_output) {
+ obstack_printf(obst, "+");
+ }
+
+ lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
+
+ if (am_flav & ia32_S) {
+ obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
+ }
+
+ had_output = 1;
+ }
+
+ if (am_flav & ia32_O) {
+ obstack_printf(obst, get_ia32_am_offs(n));
+ }
+
+ obstack_printf(obst, "] ");
+
+ size = obstack_object_size(obst);
+ s = obstack_finish(obst);
+ s[size - 1] = '\0';
+
+ return s;
}
-char *node_offset_to_str(ir_node *n) {
- char *buf = malloc(TARVAL_SNPRINTF_BUF_LEN);
- tarval_snprintf(buf, TARVAL_SNPRINTF_BUF_LEN, get_ia32_offs(n));
- return buf;
+/*************************************************************
+ * _ _ __ _ _
+ * (_) | | / _| | | | |
+ * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
+ * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
+ * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
+ * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
+ * | | | |
+ * |_| |_|
+ *************************************************************/
+
+/* We always pass the ir_node which is a pointer. */
+static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
+ return lc_arg_type_ptr;
}
-void equalize_dest_src(FILE *F, ir_node *n) {
- if (get_ia32_out_regnr(n, 0) != get_ia32_in_regnr(n, 0))
- fprintf(F, "\tmovl %%%s, %%%s\t\t\t/* src -> dest for 2 address code */\n", get_source_reg_name(n, 1), get_dest_reg_name(n, 1));
+
+/**
+ * Returns the register at in position pos.
+ */
+static const arch_register_t *get_in_reg(const 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(const ir_node *irn, 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(irn) != mode_T) {
+ reg = arch_get_irn_register(arch_env, irn);
+ }
+ else if (is_ia32_irn(irn)) {
+ reg = get_ia32_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;
+}
+
+enum io_direction {
+ IN_REG,
+ OUT_REG
+};
+
+/**
+ * Returns the name of the in register at position pos.
+ */
+static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
+ const arch_register_t *reg;
+
+ if (in_out == IN_REG) {
+ reg = get_in_reg(irn, pos);
+ }
+ else {
+ /* destination address mode nodes don't have outputs */
+ if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
+ return "MEM";
+ }
+
+ reg = get_out_reg(irn, pos);
+ }
+
+ return arch_register_get_name(reg);
+}
+
+/**
+ * Get the register name for a node.
+ */
+static int ia32_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);
+
+ buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
+
+ return lc_arg_append(app, occ, buf, strlen(buf));
+}
+
+/**
+ * Returns the tarval, offset or scale of an ia32 as a string.
+ */
+static int ia32_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 = get_ia32_cnst(X);
+ }
+ else { /* 'O' */
+ buf = get_ia32_am_offs(X);
+ }
+
+ return buf ? lc_arg_append(app, occ, buf, strlen(buf)) : 0;
+}
+
+/**
+ * Determines the SSE suffix depending on the mode.
+ */
+static int ia32_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);
+
+ return lc_appendable_chadd(app, get_mode_size_bits(get_irn_mode(X)) == 32 ? 's' : 'd');
+}
+
+/**
+ * Return the ia32 printf arg environment.
+ * We use the firm environment with some additional handlers.
+ */
+const lc_arg_env_t *ia32_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_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;
+}
+
+
+/*
+ * Add a number to a prefix. This number will not be used a second time.
+ */
+static 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;
+}
+
+
+/*************************************************
+ * _ _ _
+ * (_) | | |
+ * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
+ * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
+ * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
+ * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
+ *
+ *************************************************/
+
/*
* coding of conditions
*/
struct cmp2conditon_t {
- const char *name;
- pn_Cmp num;
+ const char *name;
+ pn_Cmp num;
};
/*
/*
* returns the condition code
*/
-const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
+static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
{
- assert(cmp2condition_s[cmp_code].num == cmp_code);
- assert(cmp2condition_u[cmp_code].num == cmp_code);
+ assert(cmp2condition_s[cmp_code].num == cmp_code);
+ assert(cmp2condition_u[cmp_code].num == cmp_code);
+
+ return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
+}
+
+/**
+ * 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 the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
+ */
+static void finish_CondJmp(FILE *F, const ir_node *irn) {
+ const ir_node *proj;
+ const ir_edge_t *edge;
+ char buf[SNPRINTF_BUF_LEN];
+
+ edge = get_irn_out_edge_first(irn);
+ proj = get_edge_src_irn(edge);
+ assert(is_Proj(proj) && "CondJmp with a non-Proj");
+
+ if (get_Proj_proj(proj) == 1) {
+ fprintf(F, "\tj%s %s\t\t\t/* cmp(a, b) == TRUE */\n",
+ get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
+ get_cfop_target(proj, buf));
+ }
+ else {
+ fprintf(F, "\tjn%s %s\t\t\t/* cmp(a, b) == FALSE */\n",
+ get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
+ get_cfop_target(proj, buf));
+ }
+
+ edge = get_irn_out_edge_next(irn, edge);
+ if (edge) {
+ proj = get_edge_src_irn(edge);
+ assert(is_Proj(proj) && "CondJmp with a non-Proj");
+ fprintf(F, "\tjmp %s\t\t\t/* otherwise */\n", get_cfop_target(proj, buf));
+ }
+}
+
+/**
+ * Emits code for conditional jump with two variables.
+ */
+static void emit_ia32_CondJmp(const ir_node *irn, emit_env_t *env) {
+ FILE *F = env->out;
+
+ lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp(%+F, %+F) */\n",
+ ia32_emit_binop(irn), get_irn_n(irn, 0), get_irn_n(irn, 1));
+ finish_CondJmp(F, irn);
+}
+
+/**
+ * Emits code for conditional jump with immediate.
+ */
+void emit_ia32_CondJmp_i(const ir_node *irn, emit_env_t *env) {
+ FILE *F = env->out;
+
+ lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp_i(%+F) */\n",
+ ia32_emit_binop(irn), get_irn_n(irn, 0));
+ finish_CondJmp(F, irn);
+}
+
+
- return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
+/*********************************************************
+ * _ _ _
+ * (_) | (_)
+ * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
+ * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
+ * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
+ * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
+ * _/ | | |
+ * |__/ |_|
+ *********************************************************/
+
+/* jump table entry (target and corresponding number) */
+typedef struct _branch_t {
+ ir_node *target;
+ int value;
+} branch_t;
+
+/* jump table for switch generation */
+typedef struct _jmp_tbl_t {
+ ir_node *defProj; /**< default target */
+ int min_value; /**< smallest switch case */
+ int max_value; /**< largest switch case */
+ int num_branches; /**< number of jumps */
+ char *label; /**< label of the jump table */
+ branch_t *branches; /**< jump array */
+} jmp_tbl_t;
+
+/**
+ * Compare two variables of type branch_t. Used to sort all switch cases
+ */
+static int ia32_cmp_branch_t(const void *a, const void *b) {
+ branch_t *b1 = (branch_t *)a;
+ branch_t *b2 = (branch_t *)b;
+
+ if (b1->value <= b2->value)
+ return -1;
+ else
+ return 1;
}
-void emit_ia32_Proj_Cond(FILE *F, ir_node *n, ir_node *cond) {
- ir_node *succ_block = get_edge_src_irn(get_irn_out_edge_first(n));
- ir_node *sel = get_Cond_selector(cond);
- ir_mode *sel_mode = get_irn_mode(sel);
+/**
+ * Emits code for a SwitchJmp (creates a jump table if
+ * possible otherwise a cmp-jmp cascade). Port from
+ * cggg ia32 backend
+ */
+void emit_ia32_SwitchJmp(const ir_node *irn, emit_env_t *emit_env) {
+ unsigned long interval;
+ char buf[SNPRINTF_BUF_LEN];
+ int last_value, i, pn, do_jmp_tbl = 1;
+ jmp_tbl_t tbl;
+ ir_node *proj;
+ const ir_edge_t *edge;
+ const lc_arg_env_t *env = ia32_get_arg_env();
+ FILE *F = emit_env->out;
+
+ /* fill the table structure */
+ tbl.label = xmalloc(SNPRINTF_BUF_LEN);
+ tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
+ tbl.defProj = NULL;
+ tbl.num_branches = get_irn_n_edges(irn);
+ tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
+ tbl.min_value = INT_MAX;
+ tbl.max_value = INT_MIN;
+
+ i = 0;
+ /* go over all proj's and collect them */
+ foreach_out_edge(irn, edge) {
+ proj = get_edge_src_irn(edge);
+ assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
+
+ pn = get_Proj_proj(proj);
+
+ /* create branch entry */
+ tbl.branches[i].target = proj;
+ tbl.branches[i].value = pn;
+
+ tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
+ tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
+
+ /* check for default proj */
+ if (pn == get_ia32_pncode(irn)) {
+ assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
+ tbl.defProj = proj;
+ }
+
+ i++;
+ }
+
+ /* sort the branches by their number */
+ qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
+
+ /* two-complement's magic make this work without overflow */
+ interval = tbl.max_value - tbl.min_value;
+
+ /* check value interval */
+ 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) {
+ /* emit the table */
+ if (tbl.min_value != 0) {
+ lc_efprintf(env, F, "\tcmpl %lu, -%d(%1S)\t\t/* first switch value is not 0 */\n",
+ interval, tbl.min_value, irn);
+ }
+ else {
+ lc_efprintf(env, F, "\tcmpl %lu, %1S\t\t\t/* compare for switch */\n", interval, irn);
+ }
+
+ fprintf(F, "\tja %s\t\t\t/* default jump if out of range */\n", get_cfop_target(tbl.defProj, buf));
+
+ if (tbl.num_branches > 1) {
+ /* create table */
+
+ lc_efprintf(env, F, "\tjmp [%1S*4+%s]\t\t/* get jump table entry as target */\n", irn, tbl.label);
+
+ fprintf(F, "\t.section\t.rodata\t\t/* start jump table */\n");
+ fprintf(F, "\t.align 4\n");
+
+ fprintf(F, "%s:\n", tbl.label);
+ fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[0].target, buf), tbl.branches[0].value);
+
+ last_value = tbl.branches[0].value;
+ for (i = 1; i < tbl.num_branches; ++i) {
+ while (++last_value < tbl.branches[i].value) {
+ fprintf(F, "\t.long %s\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
+ }
+ fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[i].target, buf), last_value);
+ }
+
+ fprintf(F, "\t.text\t\t\t\t/* end of jump table */\n");
+ }
+ else {
+ /* one jump is enough */
+ fprintf(F, "\tjmp %s\t\t/* only one case given */\n", get_cfop_target(tbl.branches[0].target, buf));
+ }
+ }
+ else { // no jump table
+ for (i = 0; i < tbl.num_branches; ++i) {
+ lc_efprintf(env, F, "\tcmpl %d, %1S\t\t\t/* case %d */\n", tbl.branches[i].value, irn, i);
+ fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
+ }
+
+ fprintf(F, "\tjmp %s\t\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
+ }
+
+ if (tbl.label)
+ free(tbl.label);
+ if (tbl.branches)
+ free(tbl.branches);
+}
+
+/**
+ * Emits code for a unconditional jump.
+ */
+void emit_Jmp(const ir_node *irn, emit_env_t *env) {
+ FILE *F = env->out;
+
+ char buf[SNPRINTF_BUF_LEN];
+ ir_fprintf(F, "\tjmp %s\t\t\t/* Jmp(%+F) */\n", get_cfop_target(irn, buf), get_irn_link(irn));
+}
+
+
+
+/****************************
+ * _
+ * (_)
+ * _ __ _ __ ___ _ ___
+ * | '_ \| '__/ _ \| |/ __|
+ * | |_) | | | (_) | |\__ \
+ * | .__/|_| \___/| ||___/
+ * | | _/ |
+ * |_| |__/
+ ****************************/
+
+/**
+ * Emits code for a proj -> node
+ */
+void emit_Proj(const ir_node *irn, emit_env_t *env) {
+ ir_node *pred = get_Proj_pred(irn);
+
+ if (get_irn_op(pred) == op_Start) {
+ switch(get_Proj_proj(irn)) {
+ case pn_Start_X_initial_exec:
+ emit_Jmp(irn, env);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/**********************************
+ * _____ ____
+ * / ____| | _ \
+ * | | ___ _ __ _ _| |_) |
+ * | | / _ \| '_ \| | | | _ <
+ * | |___| (_) | |_) | |_| | |_) |
+ * \_____\___/| .__/ \__, |____/
+ * | | __/ |
+ * |_| |___/
+ **********************************/
+
+static void emit_CopyB_prolog(FILE *F, int rem, int size) {
+ fprintf(F, "\t/* memcopy %d bytes*/\n", size);
+ fprintf(F, "\tcld\t\t\t\t/* copy direction forward*/\n");
+
+ switch(rem) {
+ case 1:
+ fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 1 */\n");
+ break;
+ case 2:
+ fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 2 */\n");
+ break;
+ case 3:
+ fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 3 */\n");
+ fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 3 */\n");
+ break;
+ }
+}
+
+void emit_ia32_CopyB(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+ tarval *tv = get_ia32_Immop_tarval(irn);
+ int rem = get_tarval_long(tv);
+ int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
+
+ emit_CopyB_prolog(F, rem, size);
+
+ fprintf(F, "\trep movsd\t\t\t\t/* memcopy */\n");
+}
+
+void emit_ia32_CopyB_i(const ir_node *irn, emit_env_t *emit_env) {
+ tarval *tv = get_ia32_Immop_tarval(irn);
+ int size = get_tarval_long(tv);
+ FILE *F = emit_env->out;
+
+ emit_CopyB_prolog(F, size & 0x3, size);
+
+ size >>= 2;
+ while (size--) {
+ fprintf(F, "\tmovsd\t\t\t\t/* memcopy unrolled */\n");
+ }
+}
+
+
+
+/*******************************************
+ * _ _
+ * | | | |
+ * | |__ ___ _ __ ___ __| | ___ ___
+ * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
+ * | |_) | __/ | | | (_) | (_| | __/\__ \
+ * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
+ *
+ *******************************************/
+
+void emit_be_Call(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+ entity *ent = be_Call_get_entity(irn);
+
+ fprintf(F, "\tcall ");
+
+ if (ent) {
+ fprintf(F, "%s", get_entity_name(ent));
+ }
+ else {
+ lc_efprintf(ia32_get_arg_env(), F, "%1D", get_irn_n(irn, be_pos_Call_ptr));
+ }
+
+ ir_fprintf(F, "\t\t\t/* %+F (be_Call) */\n", irn);
+}
+
+void emit_be_IncSP(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+ unsigned offs = be_get_IncSP_offset(irn);
+ be_stack_dir_t dir = be_get_IncSP_direction(irn);
+
+ if (offs) {
+ lc_efprintf(ia32_get_arg_env(), F, "\tadd %1S,%s%u\t\t\t/* %+F (IncSP) */\n", irn,
+ (dir == be_stack_dir_along) ? " -" : " ", offs, irn);
+ }
+ else {
+ fprintf(F, "\t\t\t\t\t/* omitted IncSP with 0 */\n");
+ }
+}
+
+void emit_be_SetSP(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+
+ lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%3S\t\t\t/* restore SP */\n", irn, irn);
+}
+
+void emit_be_Copy(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+
+ lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%1S\t\t\t/* %+F */\n", irn, irn, irn);
+}
+
+void emit_be_Perm(const ir_node *irn, emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+
+ lc_efprintf(ia32_get_arg_env(), F, "\txchg %1S, %2S\t\t\t/* %+F(%1A, %2A) */\n", irn, irn, irn);
+}
+
+/***********************************************************************************
+ * _ __ _
+ * (_) / _| | |
+ * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
+ * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
+ * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
+ * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
+ *
+ ***********************************************************************************/
+
+/**
+ * Enters the emitter functions for handled nodes into the generic
+ * pointer of an opcode.
+ */
+static void ia32_register_emitters(void) {
+
+#define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##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
+
+ /* first clear the generic function pointer for all ops */
+ clear_irp_opcodes_generic_func();
+
+ /* register all emitter functions defined in spec */
+ ia32_register_spec_emitters();
+
+ /* other ia32 emitter functions */
+ IA32_EMIT(CondJmp);
+ IA32_EMIT(SwitchJmp);
+ IA32_EMIT(CopyB);
+ IA32_EMIT(CopyB_i);
+
+ /* benode emitter */
+ BE_EMIT(Call);
+ BE_EMIT(IncSP);
+ BE_EMIT(SetSP);
+ BE_EMIT(Copy);
+ BE_EMIT(Perm);
+
+ /* firm emitter */
+ EMIT(Jmp);
+ EMIT(Proj);
+
+#undef IA32_EMIT
+#undef BE_EMIT
+#undef EMIT
+}
+
+/**
+ * Emits code for a node.
+ */
+static void ia32_emit_node(const ir_node *irn, void *env) {
+ 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));
+
+ if (op->ops.generic) {
+ void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
+ (*emit)(irn, env);
+ }
+ else {
+ 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.
+ */
+static void ia32_gen_block(ir_node *block, void *env) {
+ const 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) {
+ ia32_emit_node(irn, env);
+ }
+}
+
+
+/**
+ * Emits code for function start.
+ */
+static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
+ const char *irg_name = get_entity_name(get_irg_entity(irg));
+
+ fprintf(F, "\t.text\n");
+ fprintf(F, ".globl %s\n", irg_name);
+ fprintf(F, "\t.type\t%s, @function\n", irg_name);
+ fprintf(F, "%s:\n", irg_name);
+}
+
+/**
+ * Emits code for function end
+ */
+static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
+ const char *irg_name = get_entity_name(get_irg_entity(irg));
+
+ fprintf(F, "\tret\n");
+ fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
+}
+
+/**
+ * Sets labels for control flow nodes (jump target)
+ * TODO: Jump optimization
+ */
+static void ia32_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. Emits the code for one routine.
+ */
+void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
+ emit_env_t emit_env;
+
+ emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
+ 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;
- assert(succ_block && "Target block of Proj_Cond missing!");
+ ia32_register_emitters();
- if (sel_mode == mode_b) { // Boolean condition
- int label = get_irn_node_nr(succ_block);
- int nr = get_Proj_proj(n);
- fprintf(F, "j%s%s Label%d\t\t\t/* if (%sCond) goto Label */\n",
- nr == pn_Cond_true ? "" : "n",
- get_cmp_suffix(get_Proj_proj(sel), mode_is_signed(sel_mode)),
- label,
- nr == pn_Cond_true ? "" : "!");
- }
+ ia32_emit_func_prolog(F, irg);
+ irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
+ irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
+ ia32_emit_func_epilog(F, irg);
}
projects / libfirm / blobdiff