Plot project

2026-06-22 08:55:24 +02:00
parent bd97674f50
commit 25248c9055
16 changed files with 1750 additions and 0 deletions
--- a/a/emit_asm_x64.c
+++ b/a/emit_asm_x64.c
@@ -0,0 +1,52 @@
+void emit_expr(FILE *file, Ast *n) {
+    switch (n->kind) {
+        case AST_INT: {
+            fprintf(file, "    mov rax, %lu\n", n->u);
+        } break;
+        case AST_BINARY: {
+            emit_expr(file, n->l);
+            fprintf(file, "    push rax\n");
+            emit_expr(file, n->r);
+            fprintf(file, "    pop rcx\n");
+
+            if (n->op == TOK_PLUS) {
+                fprintf(file, "    add rax, rcx\n");
+            } else if (n->op == TOK_STAR) {
+                fprintf(file, "    imul rax, rcx\n");
+            } else if (n->op == TOK_MINUS) {
+                fprintf(file, "    mov rdx, rax\n");
+                fprintf(file, "    mov rax, rcx\n");
+                fprintf(file, "    sub rax, rdx\n");
+            } else {
+                panicf("error");
+            }
+        } break;
+        default: panicf("error");
+    }
+}
+
+void emit_program(FILE *file, Ast *n) {
+    fprintf(file, ".intel_syntax noprefix\n");
+    fprintf(file, ".global main\n");
+    fprintf(file, "main:\n");
+    emit_expr(file, n);
+    fprintf(file, "    ret\n");
+}
+
+void emit_expr_test(char *expr, int value) {
+    Token_Array tokens = lex_file("expr", expr, strlen(expr));
+    Parser parser = {tokens.data, tokens.data + tokens.len};
+    Ast *ast = parse_expr(&parser, 0);
+    FILE *file = fopen("out.s", "w");
+    emit_program(file, ast);
+    fclose(file);
+    int result = system("clang out.s -o out");
+    assert(result == 0);
+    result = system("./out");
+    assert(WEXITSTATUS(result) == value);
+}
+
+void emit_x64_test(void) {
+    emit_expr_test("10+5*2-10", 10+5*2-10);
+    printf("x64 tests passed\n");
+}