+/*
+ * 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.
+ */
+
/**
- * Register mapping for firm nodes. Stolen from bearch_firm :)
- * $Id$
+ * @file
+ * @brief Register param constraints and some other register handling tools.
+ * @author Christian Wuerdig
+ * @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <stdlib.h>
#include "pmap.h"
+#include "error.h"
#include "ia32_map_regs.h"
#include "ia32_new_nodes.h"
+#include "ia32_architecture.h"
#include "gen_ia32_regalloc_if.h"
+#include "bearch_ia32_t.h"
-static int maxnum_gpreg_args = 3; /* maximum number of int arguments passed in registers; default 3 */
-static int maxnum_fpreg_args = 5; /* maximum number of float arguments passed in registers; default 5 */
-
-/* this is the order of the assigned registers usesd for parameter passing */
-
-const arch_register_t *gpreg_param_reg_std[] = {
- &ia32_gp_regs[REG_EAX],
- &ia32_gp_regs[REG_EDX],
- &ia32_gp_regs[REG_ECX],
- &ia32_gp_regs[REG_EBX],
- &ia32_gp_regs[REG_EDI],
- &ia32_gp_regs[REG_ESI]
-};
-
-const arch_register_t *gpreg_param_reg_this[] = {
- &ia32_gp_regs[REG_ECX],
- &ia32_gp_regs[REG_EAX],
- &ia32_gp_regs[REG_EDX],
- &ia32_gp_regs[REG_EBX],
- &ia32_gp_regs[REG_EDI],
- &ia32_gp_regs[REG_ESI]
-};
+/* this is the order of the assigned registers used for parameter passing */
-const arch_register_t *fpreg_param_reg_std[] = {
- &ia32_fp_regs[REG_XMM0],
- &ia32_fp_regs[REG_XMM1],
- &ia32_fp_regs[REG_XMM2],
- &ia32_fp_regs[REG_XMM3],
- &ia32_fp_regs[REG_XMM4],
- &ia32_fp_regs[REG_XMM5],
- &ia32_fp_regs[REG_XMM6],
- &ia32_fp_regs[REG_XMM7]
-};
-
-const arch_register_t *fpreg_param_reg_this[] = {
- NULL, /* in case of a "this" pointer, the first parameter must not be a float */
- &ia32_fp_regs[REG_XMM0],
- &ia32_fp_regs[REG_XMM1],
- &ia32_fp_regs[REG_XMM2],
- &ia32_fp_regs[REG_XMM3],
- &ia32_fp_regs[REG_XMM4],
- &ia32_fp_regs[REG_XMM5],
- &ia32_fp_regs[REG_XMM6],
- &ia32_fp_regs[REG_XMM7]
-};
-
-
-
-/* Mapping to store registers in firm nodes */
-
-struct ia32_irn_reg_assoc {
- const ir_node *irn;
- const arch_register_t *reg;
-};
-
-int ia32_cmp_irn_reg_assoc(const void *a, const void *b, size_t len) {
- const struct ia32_irn_reg_assoc *x = a;
- const struct ia32_irn_reg_assoc *y = b;
-
- return x->irn != y->irn;
-}
-
-static struct ia32_irn_reg_assoc *get_irn_reg_assoc(const ir_node *irn, set *reg_set) {
- struct ia32_irn_reg_assoc templ;
- unsigned int hash;
-
- templ.irn = irn;
- templ.reg = NULL;
- hash = HASH_PTR(irn);
-
- return set_insert(reg_set, &templ, sizeof(templ), hash);
-}
-
-void ia32_set_firm_reg(ir_node *irn, const arch_register_t *reg, set *reg_set) {
- struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
- assoc->reg = reg;
-}
-
-const arch_register_t *ia32_get_firm_reg(const ir_node *irn, set *reg_set) {
- struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
- return assoc->reg;
-}
void ia32_build_16bit_reg_map(pmap *reg_map) {
pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "ax");
pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dl");
}
-char *ia32_get_mapped_reg_name(pmap *reg_map, const arch_register_t *reg) {
- pmap_entry *e = pmap_find(reg_map, (void *)reg);
-
- assert(e && "missing map init?");
-
- return e->value;
+void ia32_build_8bit_reg_map_high(pmap *reg_map) {
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "ah");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bh");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "ch");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dh");
}
-/**
- * Check all parameters and determine the maximum number of parameters
- * to pass in gp regs resp. in fp regs.
- *
- * @param n The number of parameters
- * @param modes The list of the parameter modes
- * @param n_int Holds the number of int parameters to be passed in regs after the call
- * @param n_float Holds the number of float parameters to be passed in regs after the call
- * @return The number of the last parameter to be passed in register
- */
-int ia32_get_n_regparam_class(int n, ir_mode **modes, int *n_int, int *n_float) {
- int i, finished = 0;
-
- for (i = 0; i < n && !finished; i++) {
- if (mode_is_int(modes[i])) {
- *n_int = *n_int + 1;
- }
- else if (mode_is_float(modes[i])) {
- *n_float = *n_float + 1;
- }
- else {
- finished = 1;
- }
-
- /* test for maximum */
- if (*n_int == maxnum_gpreg_args || *n_float == maxnum_fpreg_args) {
- finished = 1;
- }
- }
-
- return i - 1;
-}
-
-
-/**
- * Returns the register for parameter nr.
- *
- * @param n The number of parameters
- * @param modes The list of the parameter modes
- * @param nr The number of the parameter to return the requirements for
- * @param cc The calling convention
- * @return The register
- */
-const arch_register_t *ia32_get_RegParam_reg(int n, ir_mode **modes, long nr, unsigned cc) {
- const arch_register_t **current_gpreg_param_reg;
- const arch_register_t **current_fpreg_param_reg;
- const arch_register_t *param_reg = NULL;
- int n_gpregparam = 0;
- int n_fpregparam = 0;
- int i, done = 0;
- int cur_gp_idx = 0;
- int cur_fp_idx = 0;
- int biggest_n = ia32_get_n_regparam_class(n, modes, &n_gpregparam, &n_fpregparam);
-
- /* Check if parameter #nr is in range for passing in register */
- if (nr <= biggest_n) {
- current_gpreg_param_reg = gpreg_param_reg_std;
- current_fpreg_param_reg = fpreg_param_reg_std;
-
- if (cc & cc_this_call) {
- current_gpreg_param_reg = gpreg_param_reg_this;
- current_fpreg_param_reg = fpreg_param_reg_this;
- }
-
- /* loop over all parameters and determine whether its a int or float register parameter */
- for (i = 0; i < nr && !done && (cc & cc_reg_param); i++) {
- if (mode_is_int(modes[i]) && cur_gp_idx < maxnum_gpreg_args) {
- /* param can be passed in general purpose register and we have some registers left */
- cur_gp_idx++;
- }
- else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
- /* param can be passed in floating point register and we have some registers left */
- assert(current_gpreg_param_reg[cur_fp_idx] && "'this' pointer cannot be passed as float");
- cur_fp_idx++;
- }
- }
-
- /* now: i == nr, that's the parameter requirement we want */
- if (mode_is_int(modes[i]) && cur_gp_idx < maxnum_gpreg_args) {
- /* parameter #nr can be passed in general purpose register */
- param_reg = current_gpreg_param_reg[i];
- }
- else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
- /* parameter #nr can be passed in floating point register */
- param_reg = current_fpreg_param_reg[i];
- }
- else {
- assert(0 && "This should not happen!");
- }
- }
-
- return param_reg;
-}
-
-
-
-/**
- * Translates the projnum into a "real" argument position for register
- * requirements dependend on the predecessor.
- */
-long ia32_translate_proj_pos(const ir_node *proj) {
- ir_node *pred = get_Proj_pred(proj);
- long nr = get_Proj_proj(proj);
+const char *ia32_get_mapped_reg_name(pmap *reg_map, const arch_register_t *reg) {
+ pmap_entry *e = pmap_find(reg_map, (void *)reg);
- if (is_ia32_Ld(pred)) {
- if (nr == pn_Load_res || nr == 0)
- return 0;
- assert(0 && "unsupported Proj(Load) number");
- }
- else if (is_ia32_St(pred)) {
- return 0;
- }
- else if (is_ia32_CondJmp(pred)) {
- return 0;
- }
- else if (is_ia32_SwitchJmp(pred)) {
- return 0;
- }
- else if (is_ia32_Cdq(pred) || is_ia32_Mulh(pred)) {
- if (nr == pn_EAX)
- return 0;
- if (nr == pn_EDX)
- return 1;
- }
- else if (is_ia32_DivMod(pred)) {
- if (nr == pn_DivMod_res_div || pn_Div_res)
- return 0;
- if (nr == pn_DivMod_res_mod || pn_Mod_res)
- return 1;
- }
- else if (is_ia32_fDiv(pred)) {
- if (nr == pn_Quot_res)
- return 0;
- else
- assert(0 && "there should be no more Projs for a fDiv");
- }
- else if (get_irn_mode(proj) == mode_X && nr == pn_Start_X_initial_exec) {
- return 0;
- }
- else if (is_Proj(pred)) {
- return nr;
- }
- else if (get_irn_opcode(pred) == iro_Start) {
- return nr;
+ //assert(e && "missing map init?");
+ if (! e) {
+ printf("FIXME: ia32map_regs.c:122: returning fake register name for ia32 with 32 register\n");
+ return reg->name;
}
-// assert(0 && "unsupported Proj(X)");
- return nr;
+ return e->value;
}
projects / libfirm / blobdiff