2 * Register mapping for firm nodes. Stolen from bearch_firm :)
13 #include "ia32_map_regs.h"
14 #include "ia32_new_nodes.h"
15 #include "gen_ia32_regalloc_if.h"
17 static int maxnum_gpreg_args = 3; /* maximum number of int arguments passed in registers; default 3 */
18 static int maxnum_fpreg_args = 5; /* maximum number of float arguments passed in registers; default 5 */
20 /* this is the order of the assigned registers usesd for parameter passing */
22 const arch_register_t *gpreg_param_reg_std[] = {
23 &ia32_gp_regs[REG_EAX],
24 &ia32_gp_regs[REG_EDX],
25 &ia32_gp_regs[REG_ECX],
26 &ia32_gp_regs[REG_EBX],
27 &ia32_gp_regs[REG_EDI],
28 &ia32_gp_regs[REG_ESI]
31 const arch_register_t *gpreg_param_reg_this[] = {
32 &ia32_gp_regs[REG_ECX],
33 &ia32_gp_regs[REG_EAX],
34 &ia32_gp_regs[REG_EDX],
35 &ia32_gp_regs[REG_EBX],
36 &ia32_gp_regs[REG_EDI],
37 &ia32_gp_regs[REG_ESI]
40 const arch_register_t *fpreg_param_reg_std[] = {
41 &ia32_xmm_regs[REG_XMM0],
42 &ia32_xmm_regs[REG_XMM1],
43 &ia32_xmm_regs[REG_XMM2],
44 &ia32_xmm_regs[REG_XMM3],
45 &ia32_xmm_regs[REG_XMM4],
46 &ia32_xmm_regs[REG_XMM5],
47 &ia32_xmm_regs[REG_XMM6],
48 &ia32_xmm_regs[REG_XMM7]
51 const arch_register_t *fpreg_param_reg_this[] = {
52 NULL, /* in case of a "this" pointer, the first parameter must not be a float */
53 &ia32_xmm_regs[REG_XMM0],
54 &ia32_xmm_regs[REG_XMM1],
55 &ia32_xmm_regs[REG_XMM2],
56 &ia32_xmm_regs[REG_XMM3],
57 &ia32_xmm_regs[REG_XMM4],
58 &ia32_xmm_regs[REG_XMM5],
59 &ia32_xmm_regs[REG_XMM6],
60 &ia32_xmm_regs[REG_XMM7]
65 /* Mapping to store registers in firm nodes */
67 struct ia32_irn_reg_assoc {
69 const arch_register_t *reg;
72 int ia32_cmp_irn_reg_assoc(const void *a, const void *b, size_t len) {
73 const struct ia32_irn_reg_assoc *x = a;
74 const struct ia32_irn_reg_assoc *y = b;
76 return x->irn != y->irn;
79 static struct ia32_irn_reg_assoc *get_irn_reg_assoc(const ir_node *irn, set *reg_set) {
80 struct ia32_irn_reg_assoc templ;
87 return set_insert(reg_set, &templ, sizeof(templ), hash);
90 void ia32_set_firm_reg(ir_node *irn, const arch_register_t *reg, set *reg_set) {
91 struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
95 const arch_register_t *ia32_get_firm_reg(const ir_node *irn, set *reg_set) {
96 struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
100 void ia32_build_16bit_reg_map(pmap *reg_map) {
101 pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "ax");
102 pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bx");
103 pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cx");
104 pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dx");
105 pmap_insert(reg_map, &ia32_gp_regs[REG_ESI], "si");
106 pmap_insert(reg_map, &ia32_gp_regs[REG_EDI], "di");
107 pmap_insert(reg_map, &ia32_gp_regs[REG_EBP], "bp");
108 pmap_insert(reg_map, &ia32_gp_regs[REG_ESP], "sp");
111 void ia32_build_8bit_reg_map(pmap *reg_map) {
112 pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "al");
113 pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bl");
114 pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cl");
115 pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dl");
118 char *ia32_get_mapped_reg_name(pmap *reg_map, const arch_register_t *reg) {
119 pmap_entry *e = pmap_find(reg_map, (void *)reg);
121 assert(e && "missing map init?");
127 * Check all parameters and determine the maximum number of parameters
128 * to pass in gp regs resp. in fp regs.
130 * @param n The number of parameters
131 * @param modes The list of the parameter modes
132 * @param n_int Holds the number of int parameters to be passed in regs after the call
133 * @param n_float Holds the number of float parameters to be passed in regs after the call
134 * @return The number of the last parameter to be passed in register
136 int ia32_get_n_regparam_class(int n, ir_mode **modes, int *n_int, int *n_float) {
142 for (i = 0; i < n && !finished; i++) {
143 if (mode_is_int(modes[i]) || mode_is_reference(modes[i])) {
146 else if (mode_is_float(modes[i])) {
147 *n_float = *n_float + 1;
153 /* test for maximum */
154 if (*n_int == maxnum_gpreg_args || *n_float == maxnum_fpreg_args) {
164 * Returns the register for parameter nr.
166 * @param n The number of parameters
167 * @param modes The list of the parameter modes
168 * @param nr The number of the parameter to return the requirements for
169 * @param cc The calling convention
170 * @return The register
172 const arch_register_t *ia32_get_RegParam_reg(int n, ir_mode **modes, long nr, unsigned cc) {
173 const arch_register_t **current_gpreg_param_reg;
174 const arch_register_t **current_fpreg_param_reg;
175 const arch_register_t *param_reg = NULL;
176 int n_gpregparam = 0;
177 int n_fpregparam = 0;
181 int biggest_n = ia32_get_n_regparam_class(n, modes, &n_gpregparam, &n_fpregparam);
183 /* Check if parameter #nr is in range for passing in register */
184 if (nr <= biggest_n) {
185 current_gpreg_param_reg = gpreg_param_reg_std;
186 current_fpreg_param_reg = fpreg_param_reg_std;
188 if (cc & cc_this_call) {
189 current_gpreg_param_reg = gpreg_param_reg_this;
190 current_fpreg_param_reg = fpreg_param_reg_this;
193 /* loop over all parameters and determine whether its a int or float register parameter */
194 for (i = 0; i < nr && !done && (cc & cc_reg_param); i++) {
195 if ((mode_is_int(modes[i]) || mode_is_reference(modes[i])) && cur_gp_idx < maxnum_gpreg_args) {
196 /* param can be passed in general purpose register and we have some registers left */
199 else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
200 /* param can be passed in floating point register and we have some registers left */
201 assert(current_gpreg_param_reg[cur_fp_idx] && "'this' pointer cannot be passed as float");
206 /* now: i == nr, that's the parameter requirement we want */
207 if ((mode_is_int(modes[i]) || mode_is_reference(modes[i])) && cur_gp_idx < maxnum_gpreg_args) {
208 /* parameter #nr can be passed in general purpose register */
209 param_reg = current_gpreg_param_reg[i];
211 else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
212 /* parameter #nr can be passed in floating point register */
213 param_reg = current_fpreg_param_reg[i];
216 assert(0 && "This should not happen!");
226 * Translates the projnum into a "real" argument position for register
227 * requirements dependend on the predecessor.
229 long ia32_translate_proj_pos(const ir_node *proj) {
230 ir_node *pred = get_Proj_pred(proj);
231 long nr = get_Proj_proj(proj);
233 if (is_ia32_Ld(pred)) {
234 if (nr == pn_Load_res || nr == 0)
236 assert(0 && "unsupported Proj(Load) number");
238 else if (is_ia32_St(pred)) {
241 else if (is_ia32_CondJmp(pred)) {
244 else if (is_ia32_SwitchJmp(pred)) {
247 else if (is_ia32_Cdq(pred) || is_ia32_Mulh(pred)) {
253 else if (is_ia32_DivMod(pred)) {
254 if (nr == pn_DivMod_res_div)
256 if (nr == pn_DivMod_res_mod)
258 assert(0 && "unsupported DivMod");
260 else if (is_ia32_fDiv(pred)) {
261 if (nr == pn_Quot_res)
264 assert(0 && "there should be no more Projs for a fDiv");
266 else if (get_irn_mode(proj) == mode_X && nr == pn_Start_X_initial_exec) {
269 else if (is_Proj(pred)) {
272 else if (get_irn_opcode(pred) == iro_Start) {
276 // assert(0 && "unsupported Proj(X)");