102 lines
4.7 KiB
C
102 lines
4.7 KiB
C
#include "spl_intrin.h"
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static const spl_intrin_info_t g_intrin_table[] = {
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[SPL_INTRIN_NONE] = {0},
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[SPL_INTRIN_BITSIZEOF] = {"@bitsizeof", SPL_INTRIN_BITSIZEOF, SPL_INTRIN_FORM_CALL, 1, 1,
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SPL_INTRIN_RESULT_USIZE},
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[SPL_INTRIN_SIZEOF] = {"@sizeof", SPL_INTRIN_SIZEOF, SPL_INTRIN_FORM_CALL, 1, 1,
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SPL_INTRIN_RESULT_USIZE},
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[SPL_INTRIN_ALIGNOF] = {"@alignof", SPL_INTRIN_ALIGNOF, SPL_INTRIN_FORM_CALL, 1, 1,
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SPL_INTRIN_RESULT_USIZE},
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[SPL_INTRIN_ASSERT] = {"@assert", SPL_INTRIN_ASSERT, SPL_INTRIN_FORM_CALL, 1, 2,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_BREAKPOINT] = {"@breakpoint", SPL_INTRIN_BREAKPOINT, SPL_INTRIN_FORM_CALL, 0, 0,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_LEN] = {"len", SPL_INTRIN_LEN, SPL_INTRIN_FORM_FIELD, 0, 0,
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SPL_INTRIN_RESULT_USIZE},
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[SPL_INTRIN_INT_CAST] = {"@int_cast", SPL_INTRIN_INT_CAST, SPL_INTRIN_FORM_CALL, 2, 2,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_TRUNCATE] = {"@truncate", SPL_INTRIN_TRUNCATE, SPL_INTRIN_FORM_CALL, 2, 2,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_BIT_CAST] = {"@bit_cast", SPL_INTRIN_BIT_CAST, SPL_INTRIN_FORM_CALL, 2, 2,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_FLOAT_CAST] = {"@float_cast", SPL_INTRIN_FLOAT_CAST, SPL_INTRIN_FORM_CALL, 2, 2,
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SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_INT_FROM_FLOAT] = {"@int_from_float", SPL_INTRIN_INT_FROM_FLOAT,
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SPL_INTRIN_FORM_CALL, 2, 2, SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_FLOAT_FROM_INT] = {"@float_from_int", SPL_INTRIN_FLOAT_FROM_INT,
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SPL_INTRIN_FORM_CALL, 2, 2, SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_INT_FROM_BOOL] = {"@int_from_bool", SPL_INTRIN_INT_FROM_BOOL, SPL_INTRIN_FORM_CALL,
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1, 2, SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_INT_FROM_PTR] = {"@int_from_ptr", SPL_INTRIN_INT_FROM_PTR, SPL_INTRIN_FORM_CALL, 1,
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2, SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_PTR_FROM_INT] = {"@ptr_from_int", SPL_INTRIN_PTR_FROM_INT, SPL_INTRIN_FORM_CALL, 2,
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2, SPL_INTRIN_RESULT_UNIT},
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[SPL_INTRIN_PTR_CAST] = {"@ptr_cast", SPL_INTRIN_PTR_CAST, SPL_INTRIN_FORM_CALL, 2, 2,
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SPL_INTRIN_RESULT_UNIT},
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};
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static const usize g_intrin_count = sizeof(g_intrin_table) / sizeof(g_intrin_table[0]);
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const spl_intrin_info_t *spl_intrin_info(spl_intrin_t kind) {
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if ((usize)kind >= g_intrin_count)
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return NULL;
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return &g_intrin_table[kind];
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}
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spl_intrin_t spl_intrin_lookup_call(const char *name) {
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if (!name)
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return SPL_INTRIN_NONE;
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const char *n = name[0] == '@' ? name + 1 : name;
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for (usize i = 1; i < g_intrin_count; ++i) {
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const spl_intrin_info_t *d = &g_intrin_table[i];
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if (d->form != SPL_INTRIN_FORM_CALL)
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continue;
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const char *dn = d->name[0] == '@' ? d->name + 1 : d->name;
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if (strcmp(dn, n) == 0)
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return d->kind;
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}
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return SPL_INTRIN_NONE;
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}
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spl_intrin_t spl_intrin_lookup_field(spl_lang_type_kind_t recv_kind, const char *field) {
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if (!field)
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return SPL_INTRIN_NONE;
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if (strcmp(field, "len") == 0) {
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if (recv_kind == SPL_LANG_TYPE_ARRAY || recv_kind == SPL_LANG_TYPE_SLICE)
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return SPL_INTRIN_LEN;
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}
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return SPL_INTRIN_NONE;
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}
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spl_intrin_t spl_intrin_lookup_cast(spl_type_t *type, spl_type_id_t ft, spl_type_id_t tt) {
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/* 这是 `as` 的展开规则表。要调整 as 的语义，改这里。 */
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spl_type_node_t *f = spl_type_node(type, ft);
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spl_type_node_t *t = spl_type_node(type, tt);
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if (!f || !t)
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return SPL_INTRIN_NONE;
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if (f->kind == SPL_TYPE_INT && t->kind == SPL_TYPE_INT) {
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usize fb = f->int_type.bits;
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usize tb = t->int_type.bits;
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if (fb == tb)
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return SPL_INTRIN_BIT_CAST;
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if (fb > tb)
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return SPL_INTRIN_TRUNCATE;
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return SPL_INTRIN_INT_CAST;
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}
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if (f->kind == SPL_TYPE_FLOAT && t->kind == SPL_TYPE_FLOAT)
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return SPL_INTRIN_FLOAT_CAST;
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if (f->kind == SPL_TYPE_BOOL && t->kind == SPL_TYPE_INT)
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return SPL_INTRIN_INT_FROM_BOOL;
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if (f->kind == SPL_TYPE_PTR && t->kind == SPL_TYPE_INT)
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return SPL_INTRIN_INT_FROM_PTR;
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if (f->kind == SPL_TYPE_INT && t->kind == SPL_TYPE_PTR)
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return SPL_INTRIN_PTR_FROM_INT;
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if (f->kind == SPL_TYPE_PTR && t->kind == SPL_TYPE_PTR)
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return SPL_INTRIN_PTR_CAST;
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/* int float 刻意不在这里：只能通过显式 builtin 调用。 */
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return SPL_INTRIN_NONE;
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}
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