asm: add interfaces for a low-level bytecode assembler

asm/include/ivy/asm/assembler.h

@@ -0,0 +1,43 @@
+#ifndef IVY_ASM_ASSEMBLER_H_
+#define IVY_ASM_ASSEMBLER_H_
+
+#include <ivy/misc.h>
+#include <ivy/status.h>
+
+#define IVY_ASM_INDEX_AUTO (-1)
+
+struct ivy_selector;
+struct ivy_instr;
+
+struct ivy_assembler;
+
+enum ivy_assembler_scope_type {
+	IVY_ASM_SCOPE_NONE = 0,
+	IVY_ASM_SCOPE_UNIT,
+	IVY_ASM_SCOPE_CLASS,
+	IVY_ASM_SCOPE_LAMBDA,
+	IVY_ASM_SCOPE_MSGH,
+	IVY_ASM_SCOPE_CONSTPOOL,
+};
+
+IVY_API enum ivy_static ivy_assembler_create(struct ivy_assembler **as);
+IVY_API void ivy_assembler_destroy(struct ivy_assembler *as);
+
+IVY_API enum ivy_status ivy_assembler_begin_scope(
+	struct ivy_assembler *as, enum ivy_assembler_scope_type type);
+IVY_API enum ivy_status ivy_assembler_end_scope(struct ivy_assembler *as);
+
+IVY_API enum ivy_status ivy_assembler_put_string(
+	struct ivy_assembler *as, int index, const char *s);
+IVY_API enum ivy_status ivy_assembler_put_ident(
+	struct ivy_assembler *as, int index, const char *s);
+IVY_API enum ivy_status ivy_assembler_put_atom(
+	struct ivy_assembler *as, int index, const char *s);
+IVY_API enum ivy_status ivy_assembler_put_selector(
+	struct ivy_assembler *as, int index, struct ivy_selector *sel);
+IVY_API enum ivy_status ivy_assembler_put_mvar(
+	struct ivy_assembler *as, int index, const char *name);
+IVY_API enum ivy_status ivy_assembler_put_instr(
+	struct ivy_assembler *as, const struct ivy_instr *i);
+
+#endif

asm/include/ivy/asm/instr.h

@@ -0,0 +1,13 @@
+#ifndef IVY_ASM_INSTR_H_
+#define IVY_ASM_INSTR_H_
+
+#include <ivy/opcode.h>
+
+struct ivy_instr {
+	enum ivy_opcode i_op;
+	long i_a0;
+	long i_a1;
+	long i_a2;
+};
+
+#endif