2 * Register mapping for firm nodes. Stolen from bearch_firm :)
3 * Calculate requirements for register parameter.
4 * @author Christian Wuerdig
15 #include "ia32_map_regs.h"
16 #include "ia32_new_nodes.h"
17 #include "gen_ia32_regalloc_if.h"
19 static int maxnum_gpreg_args = 3; /* maximum number of int arguments passed in registers; default 3 */
20 static int maxnum_fpreg_args = 5; /* maximum number of float arguments passed in registers; default 5 */
22 /* this is the order of the assigned registers usesd for parameter passing */
24 const arch_register_t *gpreg_param_reg_std[] = {
25 &ia32_gp_regs[REG_EAX],
26 &ia32_gp_regs[REG_EDX],
27 &ia32_gp_regs[REG_ECX],
28 &ia32_gp_regs[REG_EBX],
29 &ia32_gp_regs[REG_EDI],
30 &ia32_gp_regs[REG_ESI]
33 const arch_register_t *gpreg_param_reg_this[] = {
34 &ia32_gp_regs[REG_ECX],
35 &ia32_gp_regs[REG_EAX],
36 &ia32_gp_regs[REG_EDX],
37 &ia32_gp_regs[REG_EBX],
38 &ia32_gp_regs[REG_EDI],
39 &ia32_gp_regs[REG_ESI]
42 const arch_register_t *fpreg_param_reg_std[] = {
43 &ia32_xmm_regs[REG_XMM0],
44 &ia32_xmm_regs[REG_XMM1],
45 &ia32_xmm_regs[REG_XMM2],
46 &ia32_xmm_regs[REG_XMM3],
47 &ia32_xmm_regs[REG_XMM4],
48 &ia32_xmm_regs[REG_XMM5],
49 &ia32_xmm_regs[REG_XMM6],
50 &ia32_xmm_regs[REG_XMM7]
53 const arch_register_t *fpreg_param_reg_this[] = {
54 NULL, /* in case of a "this" pointer, the first parameter must not be a float */
55 &ia32_xmm_regs[REG_XMM0],
56 &ia32_xmm_regs[REG_XMM1],
57 &ia32_xmm_regs[REG_XMM2],
58 &ia32_xmm_regs[REG_XMM3],
59 &ia32_xmm_regs[REG_XMM4],
60 &ia32_xmm_regs[REG_XMM5],
61 &ia32_xmm_regs[REG_XMM6],
62 &ia32_xmm_regs[REG_XMM7]
67 /* Mapping to store registers in firm nodes */
69 struct ia32_irn_reg_assoc {
71 const arch_register_t *reg;
74 int ia32_cmp_irn_reg_assoc(const void *a, const void *b, size_t len) {
75 const struct ia32_irn_reg_assoc *x = a;
76 const struct ia32_irn_reg_assoc *y = b;
78 return x->irn != y->irn;
81 static struct ia32_irn_reg_assoc *get_irn_reg_assoc(const ir_node *irn, set *reg_set) {
82 struct ia32_irn_reg_assoc templ;
89 return set_insert(reg_set, &templ, sizeof(templ), hash);
92 void ia32_set_firm_reg(ir_node *irn, const arch_register_t *reg, set *reg_set) {
93 struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
97 const arch_register_t *ia32_get_firm_reg(const ir_node *irn, set *reg_set) {
98 struct ia32_irn_reg_assoc *assoc = get_irn_reg_assoc(irn, reg_set);
102 void ia32_build_16bit_reg_map(pmap *reg_map) {
103 pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "ax");
104 pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bx");
105 pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cx");
106 pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dx");
107 pmap_insert(reg_map, &ia32_gp_regs[REG_ESI], "si");
108 pmap_insert(reg_map, &ia32_gp_regs[REG_EDI], "di");
109 pmap_insert(reg_map, &ia32_gp_regs[REG_EBP], "bp");
110 pmap_insert(reg_map, &ia32_gp_regs[REG_ESP], "sp");
113 void ia32_build_8bit_reg_map(pmap *reg_map) {
114 pmap_insert(reg_map, &ia32_gp_regs[REG_EAX], "al");
115 pmap_insert(reg_map, &ia32_gp_regs[REG_EBX], "bl");
116 pmap_insert(reg_map, &ia32_gp_regs[REG_ECX], "cl");
117 pmap_insert(reg_map, &ia32_gp_regs[REG_EDX], "dl");
120 const char *ia32_get_mapped_reg_name(pmap *reg_map, const arch_register_t *reg) {
121 pmap_entry *e = pmap_find(reg_map, (void *)reg);
123 //assert(e && "missing map init?");
125 printf("FIXME: ia32map_regs.c:122: returning fake register name for ia32 with 32 register\n");
133 * Check all parameters and determine the maximum number of parameters
134 * to pass in gp regs resp. in fp regs.
136 * @param n The number of parameters
137 * @param modes The list of the parameter modes
138 * @param n_int Holds the number of int parameters to be passed in regs after the call
139 * @param n_float Holds the number of float parameters to be passed in regs after the call
140 * @return The number of the last parameter to be passed in register
142 int ia32_get_n_regparam_class(int n, ir_mode **modes, int *n_int, int *n_float) {
148 for (i = 0; i < n && !finished; i++) {
149 if (mode_is_int(modes[i]) || mode_is_reference(modes[i])) {
152 else if (mode_is_float(modes[i])) {
153 *n_float = *n_float + 1;
159 /* test for maximum */
160 if (*n_int == maxnum_gpreg_args || *n_float == maxnum_fpreg_args) {
170 * Returns the register for parameter nr.
172 * @param n The number of parameters
173 * @param modes The list of the parameter modes
174 * @param nr The number of the parameter to return the requirements for
175 * @param cc The calling convention
176 * @return The register
178 const arch_register_t *ia32_get_RegParam_reg(int n, ir_mode **modes, long nr, unsigned cc) {
179 const arch_register_t **current_gpreg_param_reg;
180 const arch_register_t **current_fpreg_param_reg;
181 const arch_register_t *param_reg = NULL;
182 int n_gpregparam = 0;
183 int n_fpregparam = 0;
187 int biggest_n = ia32_get_n_regparam_class(n, modes, &n_gpregparam, &n_fpregparam);
189 /* Check if parameter #nr is in range for passing in register */
190 if (nr <= biggest_n) {
191 current_gpreg_param_reg = gpreg_param_reg_std;
192 current_fpreg_param_reg = fpreg_param_reg_std;
194 if (cc & cc_this_call) {
195 current_gpreg_param_reg = gpreg_param_reg_this;
196 current_fpreg_param_reg = fpreg_param_reg_this;
199 /* loop over all parameters and determine whether its a int or float register parameter */
200 for (i = 0; i < nr && !done && (cc & cc_reg_param); i++) {
201 if ((mode_is_int(modes[i]) || mode_is_reference(modes[i])) && cur_gp_idx < maxnum_gpreg_args) {
202 /* param can be passed in general purpose register and we have some registers left */
205 else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
206 /* param can be passed in floating point register and we have some registers left */
207 assert(current_gpreg_param_reg[cur_fp_idx] && "'this' pointer cannot be passed as float");
212 /* now: i == nr, that's the parameter requirement we want */
213 if ((mode_is_int(modes[i]) || mode_is_reference(modes[i])) && cur_gp_idx < maxnum_gpreg_args) {
214 /* parameter #nr can be passed in general purpose register */
215 param_reg = current_gpreg_param_reg[i];
217 else if (mode_is_float(modes[i]) && cur_fp_idx < maxnum_fpreg_args) {
218 /* parameter #nr can be passed in floating point register */
219 param_reg = current_fpreg_param_reg[i];
222 assert(0 && "This should not happen!");
232 * Translates the projnum into a "real" argument position for register
233 * requirements dependend on the predecessor.
235 long ia32_translate_proj_pos(const ir_node *proj) {
236 ir_node *pred = get_Proj_pred(proj);
237 long nr = get_Proj_proj(proj);
239 if (is_ia32_Ld(pred)) {
240 if (nr == pn_Load_res || nr == 0)
242 assert(0 && "unsupported Proj(Load) number");
244 else if (is_ia32_Cdq(pred) || is_ia32_MulS(pred) || is_ia32_Mulh(pred)) {
250 else if (is_ia32_DivMod(pred)) {
251 if (nr == pn_DivMod_res_div)
253 if (nr == pn_DivMod_res_mod)
255 assert(0 && "unsupported DivMod");
257 else if (get_irn_opcode(pred) == iro_Start) {
260 else if (is_ia32_CopyB(pred) || is_ia32_CopyB_i(pred)) {
264 // assert(0 && "unsupported Proj(X)");