/**
* Register mapping for firm nodes. Stolen from bearch_firm :)
+ * Calculate requirements for register parameter.
+ * @author Christian Wuerdig
* $Id$
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include <stdlib.h>
+#include "pmap.h"
+
#include "ia32_map_regs.h"
#include "ia32_new_nodes.h"
+#include "gen_ia32_regalloc_if.h"
+#include "../benodesets.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]
+};
+
+const arch_register_t *fpreg_param_reg_std[] = {
+ &ia32_xmm_regs[REG_XMM0],
+ &ia32_xmm_regs[REG_XMM1],
+ &ia32_xmm_regs[REG_XMM2],
+ &ia32_xmm_regs[REG_XMM3],
+ &ia32_xmm_regs[REG_XMM4],
+ &ia32_xmm_regs[REG_XMM5],
+ &ia32_xmm_regs[REG_XMM6],
+ &ia32_xmm_regs[REG_XMM7]
+};
-struct irn_reg_assoc {
+const arch_register_t *fpreg_param_reg_this[] = {
+ NULL, /* in case of a "this" pointer, the first parameter must not be a float */
+ &ia32_xmm_regs[REG_XMM0],
+ &ia32_xmm_regs[REG_XMM1],
+ &ia32_xmm_regs[REG_XMM2],
+ &ia32_xmm_regs[REG_XMM3],
+ &ia32_xmm_regs[REG_XMM4],
+ &ia32_xmm_regs[REG_XMM5],
+ &ia32_xmm_regs[REG_XMM6],
+ &ia32_xmm_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 cmp_irn_reg_assoc(const void *a, const void *b, size_t len) {
- const struct irn_reg_assoc *x = a;
- const struct irn_reg_assoc *y = b;
+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);
+ return x->irn != y->irn;
}
-static struct irn_reg_assoc *get_irn_reg_assoc(const ir_node *irn, set *reg_set) {
- struct irn_reg_assoc templ;
+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);
+ hash = nodeset_hash(irn);
return set_insert(reg_set, &templ, sizeof(templ), hash);
}
-void ia32_set_firm_reg(const arch_irn_ops_t *self, ir_node *irn,
- const arch_register_t *reg, set *reg_set)
-{
- struct irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
+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 arch_irn_ops_t *self,
- const ir_node *irn, set *reg_set)
-{
- struct irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
+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_EBX], "bx");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cx");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dx");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_ESI], "si");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EDI], "di");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EBP], "bp");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_ESP], "sp");
+}
+
+void ia32_build_8bit_reg_map(pmap *reg_map) {
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "al");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bl");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cl");
+ pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dl");
+}
+
+const 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?");
+ if (! e) {
+ printf("FIXME: ia32map_regs.c:122: returning fake register name for ia32 with 32 register\n");
+ return reg->name;
+ }
+
+ return e->value;
+}
/**
- * Translates the projnum into a "real" argument position for register
- * requirements dependend on the predecessor.
+ * 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
*/
-long translate_proj_pos(const ir_node *proj) {
- ir_node *first;
- ir_node *pred = get_Proj_pred(proj);
- long nr = get_Proj_proj(proj);
-
- if (is_ia32_Load(pred)) {
- if (nr == pn_Load_res)
- return 0;
- assert(0 && "unsupported Proj(Load) number");
- }
- else if (is_ia32_Store(pred)) {
- return 0;
- }
- else if (is_ia32_CondJmp(pred) || is_ia32_CondJmp_i(pred)) {
- return 0;
- }
- else if (is_ia32_SwitchJmp(pred)) {
- return 0;
- }
- else if (is_ia32_Cltd(pred) || is_ia32_Mul(pred)) {
- if (nr == pn_EAX)
- return 0;
- if (nr == pn_EDX)
- return 1;
+int ia32_get_n_regparam_class(int n, ir_mode **modes, int *n_int, int *n_float) {
+ int i, finished = 0;
+
+ *n_int = 0;
+ *n_float = 0;
+
+ for (i = 0; i < n && !finished; i++) {
+ if (mode_is_int(modes[i]) || mode_is_reference(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;
+ }
}
- 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_Call(pred)) {
- return 0;
- }
- else if (get_irn_mode(proj) == mode_X && nr == pn_Start_X_initial_exec) {
- return 0;
- }
- else if (is_Proj(pred)) {
-// return nr + translate_proj_pos(pred);
- first = get_Proj_pred(pred);
- if (is_ia32_Call(first))
- return 0;
+ return i - 1;
+}
+
- assert(0 && "unsupported proj-pos translation Proj(Proj)");
- return -1;
- }
- else if (get_irn_opcode(pred) == iro_Start) {
- return nr;
+/**
+ * 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]) || mode_is_reference(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]) || mode_is_reference(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!");
+ }
}
-// assert(0 && "unsupported Proj(X)");
- return nr;
+ return param_reg;
}
projects / libfirm / blobdiff