diff options
| -rw-r--r-- | gen_code.c | 40 |
1 files changed, 40 insertions, 0 deletions
@@ -24,6 +24,42 @@ scope *cur_scope; char **reg_stack, **reg_ptr; int reg_cnt; +#define STACK_SAVE {\ + fprintf(stdout, + "pushq\t%rax\n"\ + "pushq\t%rcx\n"\ + "pushq\t%rdx\n"\ + "pushq\t%rsi\n"\ + "pushq\t%rdi\n"\ + "pushq\tr8\n" \ + "pushq\tr9\n" \ + "pushq\t%r10\n"\ + "pushq\t%r11\n"\ + "pushq\t%r12\n"\ + "pushq\t%r13\n"\ + "pushq\t%r14\n"\ + "pushq\t%r15\n"\ + )\ +} + +#define STACK_LOAD {\ + fprintf(stdout, + "popq\t%r15\n"\ + "popq\t%r14\n"\ + "popq\t%r13\n"\ + "popq\t%r12\n"\ + "popq\t%r11\n"\ + "popq\t%r10\n"\ + "popq\tr9\n" \ + "popq\tr8\n" \ + "popq\t%rdi\n"\ + "popq\t%rsi\n"\ + "popq\t%rdx\n"\ + "popq\t%rcx\n"\ + "popq\t%rax\n"\ + )\ +} + int gen_label(t) ptree *t; { @@ -178,21 +214,25 @@ ptree *t; if (!strcmp(t->l->attr.nval->name, "write")) { GEN_EXPR(t->r); fprintf(stdout, "movq %s, %%rsi\n", *reg_ptr); + STACK_SAVE fprintf(stdout, "leaq int_print(%%rip)," "%%rdi\n"); fprintf(stdout, "movq $0, %%rax\n"); fprintf(stdout, "call printf\n"); + STACK_LOAD break; } else if (!strcmp(t->l->attr.nval->name, "read")) { fprintf(stderr,"Read\n"); break; } + STACK_SAVE fprintf(stdout, "subq $%d, %%rsp\n", t->l->attr.nval->func_info->argc * OFFSET_SIZE); gen_arguments(t->r); fprintf(stdout, "call\t%s\n", t->l->attr.nval->name); + STACK_LOAD break; |