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py/emitnative: Simplify generation of code that loads prelude pointer. 

It's possible to use REG_PARENT_ARG_1 instead of REG_LOCAL_3.

Signed-off-by: Damien George <damien@micropython.org>
pull/8682/head
Damien George 2022-05-19 15:07:31 +10:00
rodzic 56f2d3c2e5
commit b608964804
1 zmienionych plików z 3 dodań i 8 usunięć
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py/emitnative.c
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@ -549,16 +549,11 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
// Set code_state.ip, a pointer to the beginning of the prelude. This pointer is found
// either directly in mp_obj_fun_bc_t.child_table (if there are no children), or in
// mp_obj_fun_bc_t.child_table[num_children] (if num_children > 0).
// Need to use some locals for this, so assert that they are available for use
MP_STATIC_ASSERT(REG_LOCAL_3 != REG_PARENT_ARG_1);
MP_STATIC_ASSERT(REG_LOCAL_3 != REG_PARENT_ARG_2);
MP_STATIC_ASSERT(REG_LOCAL_3 != REG_PARENT_ARG_3);
MP_STATIC_ASSERT(REG_LOCAL_3 != REG_PARENT_ARG_4);
ASM_LOAD_REG_REG_OFFSET(emit->as, REG_LOCAL_3, REG_PARENT_ARG_1, OFFSETOF_OBJ_FUN_BC_CHILD_TABLE);
ASM_LOAD_REG_REG_OFFSET(emit->as, REG_PARENT_ARG_1, REG_PARENT_ARG_1, OFFSETOF_OBJ_FUN_BC_CHILD_TABLE);
if (emit->prelude_ptr_index != 0) {
ASM_LOAD_REG_REG_OFFSET(emit->as, REG_LOCAL_3, REG_LOCAL_3, emit->prelude_ptr_index);
ASM_LOAD_REG_REG_OFFSET(emit->as, REG_PARENT_ARG_1, REG_PARENT_ARG_1, emit->prelude_ptr_index);
}
emit_native_mov_state_reg(emit, emit->code_state_start + OFFSETOF_CODE_STATE_IP, REG_LOCAL_3);
emit_native_mov_state_reg(emit, emit->code_state_start + OFFSETOF_CODE_STATE_IP, REG_PARENT_ARG_1);
// Set code_state.n_state (only works on little endian targets due to n_state being uint16_t)
emit_native_mov_state_imm_via(emit, emit->code_state_start + OFFSETOF_CODE_STATE_N_STATE, emit->n_state, REG_ARG_1);