2 * Processor architecture specification.
3 * @author Sebastian Hack
28 arch_env_t *arch_env_init(arch_env_t *env, const arch_isa_if_t *isa)
30 memset(env, 0, sizeof(*env));
35 arch_env_t *arch_env_add_irn_handler(arch_env_t *env,
36 const arch_irn_handler_t *handler)
38 assert(env->handlers_tos <= ARCH_MAX_HANDLERS);
39 env->handlers[env->handlers_tos++] = handler;
43 static const arch_irn_ops_t *fallback_irn_ops = NULL;
45 int arch_register_class_put(const arch_register_class_t *cls, struct _bitset_t *bs)
49 for(i = 0, n = cls->n_regs; i < n; ++i)
57 * Get the isa responsible for a node.
58 * @param env The arch environment with the isa stack.
59 * @param irn The node to get the responsible isa for.
60 * @return The irn operations given by the responsible isa.
62 static INLINE const arch_irn_ops_t *
63 get_irn_ops(const arch_env_t *env, const ir_node *irn)
67 for(i = env->handlers_tos - 1; i >= 0; --i) {
68 const arch_irn_ops_t *ops = env->handlers[i]->get_irn_ops(irn);
73 return fallback_irn_ops;
76 int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn,
77 int pos, const arch_register_class_t *cls, bitset_t *bs)
79 const arch_irn_ops_t *ops = get_irn_ops(env, irn);
80 const arch_register_req_t *req = ops->get_irn_reg_req(irn, pos);
83 case arch_register_req_type_normal:
84 arch_register_class_put(req->cls, bs);
85 return req->cls->n_regs;
87 case arch_register_req_type_limited:
88 return req->data.limited(irn, pos, bs);
91 assert(0 && "This register requirement case is not covered");
97 int arch_reg_is_allocatable(const arch_env_t *env, const ir_node *irn,
98 int pos, const arch_register_t *reg)
100 const arch_register_class_t *cls = arch_register_get_class(reg);
101 int n_regs = arch_register_class_n_regs(cls);
102 bitset_t *bs = bitset_alloca(n_regs);
104 arch_get_allocatable_regs(env, irn, pos, cls, bs);
105 return bitset_is_set(bs, arch_register_get_index(reg));
108 const arch_register_class_t *
109 arch_get_irn_reg_class(const arch_env_t *env, const ir_node *irn, int pos)
111 const arch_irn_ops_t *ops = get_irn_ops(env, irn);
112 const arch_register_req_t *req = ops->get_irn_reg_req(irn, pos);
113 return req ? req->cls : NULL;
116 extern const arch_register_t *
117 arch_get_irn_register(const arch_env_t *env, const ir_node *irn, int idx)
119 const arch_irn_ops_t *ops = get_irn_ops(env, irn);
121 return ops->get_irn_reg(irn, idx);
124 extern void arch_set_irn_register(const arch_env_t *env,
125 ir_node *irn, int idx, const arch_register_t *reg)
127 const arch_irn_ops_t *ops = get_irn_ops(env, irn);
129 ops->set_irn_reg(irn, idx, reg);