static void
load_acc_offset(int offset)
{
acc_const = 0;
if (acc_loaded) {
if (acc_offset == offset) return;
if (acc_dirty)
clean_acc();
}
acc_offset = offset;
if (tape_step > 1) {
if (acc_offset) {
jit_ldxi_i(REG_ACC, REG_P, acc_offset * tape_step);
} else {
jit_ldr_i(REG_ACC, REG_P);
}
} else {
if (acc_offset) {
jit_ldxi_uc(REG_ACC, REG_P, acc_offset);
} else {
jit_ldr_uc(REG_ACC, REG_P);
}
}
acc_loaded = 1;
acc_dirty = 0;
acc_hi_dirty = (tape_step*8 != cell_size);
}
void
outrun(int ch, int count)
{
jit_node_t *argp;
switch(ch) {
case '!':
if (bytecell) tape_step = 1; else
tape_step = sizeof(int);
init_jit(NULL); // argv[0]);
_jit = jit_new_state();
start = jit_note(__FILE__, __LINE__);
jit_prolog();
/* Get the data area pointer */
argp = jit_arg();
jit_getarg(REG_P, argp);
break;
case '~':
jit_ret();
jit_epilog();
end = jit_note(__FILE__, __LINE__);
codeptr = jit_emit();
jit_clear_state();
codeptr(calloc(tape_step, tapelen));
jit_destroy_state();
finish_jit();
codeptr = 0;
if (loopstack) { free(loopstack); loopstack = 0; }
break;
case '>':
jit_addi(REG_P, REG_P, count * tape_step);
break;
case '<':
jit_subi(REG_P, REG_P, count * tape_step);
break;
case '+':
if (tape_step>1)
jit_ldr_i(REG_ACC, REG_P);
else
jit_ldr_uc(REG_ACC, REG_P);
jit_addi(REG_ACC, REG_ACC, count);
if (tape_step>1)
jit_str_i(REG_P, REG_ACC);
else
jit_str_c(REG_P, REG_ACC);
break;
case '-':
if (tape_step>1)
jit_ldr_i(REG_ACC, REG_P);
else
jit_ldr_uc(REG_ACC, REG_P);
jit_subi(REG_ACC, REG_ACC, count);
if (tape_step>1)
jit_str_i(REG_P, REG_ACC);
else
jit_str_c(REG_P, REG_ACC);
break;
case '[':
if (tape_step>1)
jit_ldr_i(REG_ACC, REG_P);
else
jit_ldr_uc(REG_ACC, REG_P);
if (stackptr >= maxstack) {
loopstack = realloc(loopstack,
((maxstack+=32)+2)*sizeof(*loopstack));
if (loopstack == 0) {
perror("loop stack realloc failure");
exit(1);
}
}
loopstack[stackptr] = jit_beqi(REG_ACC, 0);
loopstack[stackptr+1] = jit_label();
stackptr += 2;
break;
case ']':
if (tape_step>1)
jit_ldr_i(REG_ACC, REG_P);
else
jit_ldr_uc(REG_ACC, REG_P);
stackptr -= 2;
if (stackptr < 0) {
fprintf(stderr, "Code gen failure: Stack pointer negative.\n");
exit(1);
}
{
jit_node_t *ref;
ref = jit_bnei(REG_ACC, 0);
jit_patch_at(ref, loopstack[stackptr+1]);
jit_patch(loopstack[stackptr]);
}
break;
case '.':
if (tape_step>1)
jit_ldr_i(REG_ACC, REG_P);
else
jit_ldr_uc(REG_ACC, REG_P);
jit_prepare();
jit_pushargr(REG_ACC);
jit_finishi(putchar);
break;
case ',':
jit_prepare();
jit_pushargr(REG_ACC);
jit_finishi(getchar);
jit_retval(REG_ACC);
if (tape_step>1)
jit_str_i(REG_P, REG_ACC);
else
jit_str_c(REG_P, REG_ACC);
break;
}
}