632 lines
25 KiB
C
632 lines
25 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "py/emit.h"
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#include "py/asmthumb.h"
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#if MICROPY_EMIT_INLINE_THUMB
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typedef enum {
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#define DEF_RULE(rule, comp, kind, ...) PN_##rule,
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#include "py/grammar.h"
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#undef DEF_RULE
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PN_maximum_number_of,
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} pn_kind_t;
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struct _emit_inline_asm_t {
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uint16_t pass;
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scope_t *scope;
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mp_obj_t *error_slot;
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mp_uint_t max_num_labels;
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qstr *label_lookup;
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asm_thumb_t *as;
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};
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STATIC void emit_inline_thumb_error_msg(emit_inline_asm_t *emit, const char *msg) {
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*emit->error_slot = mp_obj_new_exception_msg(&mp_type_SyntaxError, msg);
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}
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STATIC void emit_inline_thumb_error_exc(emit_inline_asm_t *emit, mp_obj_t exc) {
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*emit->error_slot = exc;
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}
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emit_inline_asm_t *emit_inline_thumb_new(mp_uint_t max_num_labels) {
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emit_inline_asm_t *emit = m_new_obj(emit_inline_asm_t);
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emit->max_num_labels = max_num_labels;
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emit->label_lookup = m_new(qstr, max_num_labels);
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memset(emit->label_lookup, 0, emit->max_num_labels * sizeof(qstr));
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emit->as = asm_thumb_new(max_num_labels);
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return emit;
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}
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void emit_inline_thumb_free(emit_inline_asm_t *emit) {
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m_del(qstr, emit->label_lookup, emit->max_num_labels);
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asm_thumb_free(emit->as, false);
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m_del_obj(emit_inline_asm_t, emit);
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}
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STATIC void emit_inline_thumb_start_pass(emit_inline_asm_t *emit, pass_kind_t pass, scope_t *scope, mp_obj_t *error_slot) {
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emit->pass = pass;
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emit->scope = scope;
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emit->error_slot = error_slot;
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asm_thumb_start_pass(emit->as, pass == MP_PASS_EMIT ? ASM_THUMB_PASS_EMIT : ASM_THUMB_PASS_COMPUTE);
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asm_thumb_entry(emit->as, 0);
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}
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STATIC void emit_inline_thumb_end_pass(emit_inline_asm_t *emit) {
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asm_thumb_exit(emit->as);
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asm_thumb_end_pass(emit->as);
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if (emit->pass == MP_PASS_EMIT) {
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void *f = asm_thumb_get_code(emit->as);
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mp_emit_glue_assign_native(emit->scope->raw_code, MP_CODE_NATIVE_ASM, f, asm_thumb_get_code_size(emit->as), emit->scope->num_pos_args, 0);
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}
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}
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STATIC mp_uint_t emit_inline_thumb_count_params(emit_inline_asm_t *emit, mp_uint_t n_params, mp_parse_node_t *pn_params) {
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if (n_params > 4) {
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emit_inline_thumb_error_msg(emit, "can only have up to 4 parameters to Thumb assembly");
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return 0;
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}
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for (mp_uint_t i = 0; i < n_params; i++) {
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if (!MP_PARSE_NODE_IS_ID(pn_params[i])) {
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emit_inline_thumb_error_msg(emit, "parameters must be registers in sequence r0 to r3");
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return 0;
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}
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const char *p = qstr_str(MP_PARSE_NODE_LEAF_ARG(pn_params[i]));
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if (!(strlen(p) == 2 && p[0] == 'r' && p[1] == '0' + i)) {
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emit_inline_thumb_error_msg(emit, "parameters must be registers in sequence r0 to r3");
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return 0;
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}
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}
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return n_params;
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}
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STATIC void emit_inline_thumb_label(emit_inline_asm_t *emit, mp_uint_t label_num, qstr label_id) {
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assert(label_num < emit->max_num_labels);
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emit->label_lookup[label_num] = label_id;
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asm_thumb_label_assign(emit->as, label_num);
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}
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STATIC void emit_inline_thumb_align(emit_inline_asm_t *emit, mp_uint_t align) {
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asm_thumb_align(emit->as, align);
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}
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STATIC void emit_inline_thumb_data(emit_inline_asm_t *emit, mp_uint_t bytesize, mp_uint_t val) {
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asm_thumb_data(emit->as, bytesize, val);
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}
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typedef struct _reg_name_t { byte reg; byte name[3]; } reg_name_t;
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STATIC const reg_name_t reg_name_table[] = {
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{0, "r0\0"},
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{1, "r1\0"},
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{2, "r2\0"},
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{3, "r3\0"},
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{4, "r4\0"},
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{5, "r5\0"},
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{6, "r6\0"},
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{7, "r7\0"},
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{8, "r8\0"},
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{9, "r9\0"},
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{10, "r10"},
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{11, "r11"},
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{12, "r12"},
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{13, "r13"},
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{14, "r14"},
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{15, "r15"},
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{10, "sl\0"},
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{11, "fp\0"},
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{13, "sp\0"},
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{14, "lr\0"},
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{15, "pc\0"},
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};
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// return empty string in case of error, so we can attempt to parse the string
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// without a special check if it was in fact a string
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STATIC const char *get_arg_str(mp_parse_node_t pn) {
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if (MP_PARSE_NODE_IS_ID(pn)) {
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qstr qst = MP_PARSE_NODE_LEAF_ARG(pn);
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return qstr_str(qst);
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} else {
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return "";
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}
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}
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STATIC mp_uint_t get_arg_reg(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, mp_uint_t max_reg) {
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const char *reg_str = get_arg_str(pn);
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for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(reg_name_table); i++) {
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const reg_name_t *r = ®_name_table[i];
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if (reg_str[0] == r->name[0]
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&& reg_str[1] == r->name[1]
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&& reg_str[2] == r->name[2]
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&& (reg_str[2] == '\0' || reg_str[3] == '\0')) {
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if (r->reg > max_reg) {
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emit_inline_thumb_error_exc(emit,
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mp_obj_new_exception_msg_varg(&mp_type_SyntaxError,
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"'%s' expects at most r%d", op, max_reg));
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return 0;
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} else {
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return r->reg;
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}
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}
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}
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emit_inline_thumb_error_exc(emit,
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mp_obj_new_exception_msg_varg(&mp_type_SyntaxError,
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"'%s' expects a register", op));
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return 0;
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}
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STATIC mp_uint_t get_arg_reglist(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) {
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// a register list looks like {r0, r1, r2} and is parsed as a Python set
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if (!MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_atom_brace)) {
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goto bad_arg;
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}
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mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;
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assert(MP_PARSE_NODE_STRUCT_NUM_NODES(pns) == 1); // should always be
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pn = pns->nodes[0];
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mp_uint_t reglist = 0;
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if (MP_PARSE_NODE_IS_ID(pn)) {
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// set with one element
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reglist |= 1 << get_arg_reg(emit, op, pn, 15);
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} else if (MP_PARSE_NODE_IS_STRUCT(pn)) {
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pns = (mp_parse_node_struct_t*)pn;
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if (MP_PARSE_NODE_STRUCT_KIND(pns) == PN_dictorsetmaker) {
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assert(MP_PARSE_NODE_IS_STRUCT(pns->nodes[1])); // should succeed
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mp_parse_node_struct_t *pns1 = (mp_parse_node_struct_t*)pns->nodes[1];
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if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_dictorsetmaker_list) {
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// set with multiple elements
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// get first element of set (we rely on get_arg_reg to catch syntax errors)
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reglist |= 1 << get_arg_reg(emit, op, pns->nodes[0], 15);
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// get tail elements (2nd, 3rd, ...)
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mp_parse_node_t *nodes;
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int n = mp_parse_node_extract_list(&pns1->nodes[0], PN_dictorsetmaker_list2, &nodes);
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// process rest of elements
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for (int i = 0; i < n; i++) {
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reglist |= 1 << get_arg_reg(emit, op, nodes[i], 15);
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}
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} else {
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goto bad_arg;
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}
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} else {
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goto bad_arg;
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}
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} else {
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goto bad_arg;
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}
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return reglist;
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bad_arg:
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects {r0, r1, ...}", op));
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return 0;
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}
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STATIC int get_arg_i(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, int fit_mask) {
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if (!MP_PARSE_NODE_IS_SMALL_INT(pn)) {
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects an integer", op));
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return 0;
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}
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int i = MP_PARSE_NODE_LEAF_SMALL_INT(pn);
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if ((i & (~fit_mask)) != 0) {
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' integer 0x%x does not fit in mask 0x%x", op, i, fit_mask));
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return 0;
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}
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return i;
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}
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STATIC bool get_arg_addr(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, mp_parse_node_t *pn_base, mp_parse_node_t *pn_offset) {
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if (!MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_atom_bracket)) {
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goto bad_arg;
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}
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mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;
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if (!MP_PARSE_NODE_IS_STRUCT_KIND(pns->nodes[0], PN_testlist_comp)) {
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goto bad_arg;
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}
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pns = (mp_parse_node_struct_t*)pns->nodes[0];
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if (MP_PARSE_NODE_STRUCT_NUM_NODES(pns) != 2) {
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goto bad_arg;
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}
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*pn_base = pns->nodes[0];
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*pn_offset = pns->nodes[1];
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return true;
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bad_arg:
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects an address of the form [a, b]", op));
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return false;
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}
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STATIC int get_arg_label(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) {
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if (!MP_PARSE_NODE_IS_ID(pn)) {
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects a label", op));
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return 0;
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}
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qstr label_qstr = MP_PARSE_NODE_LEAF_ARG(pn);
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for (int i = 0; i < emit->max_num_labels; i++) {
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if (emit->label_lookup[i] == label_qstr) {
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return i;
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}
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}
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// only need to have the labels on the last pass
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if (emit->pass == MP_PASS_EMIT) {
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emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "label '%s' not defined", qstr_str(label_qstr)));
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}
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return 0;
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}
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typedef struct _cc_name_t { byte cc; byte name[2]; } cc_name_t;
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STATIC const cc_name_t cc_name_table[] = {
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{ ASM_THUMB_CC_EQ, "eq" },
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{ ASM_THUMB_CC_NE, "ne" },
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{ ASM_THUMB_CC_CS, "cs" },
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{ ASM_THUMB_CC_CC, "cc" },
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{ ASM_THUMB_CC_MI, "mi" },
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{ ASM_THUMB_CC_PL, "pl" },
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{ ASM_THUMB_CC_VS, "vs" },
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{ ASM_THUMB_CC_VC, "vc" },
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{ ASM_THUMB_CC_HI, "hi" },
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{ ASM_THUMB_CC_LS, "ls" },
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{ ASM_THUMB_CC_GE, "ge" },
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{ ASM_THUMB_CC_LT, "lt" },
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{ ASM_THUMB_CC_GT, "gt" },
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{ ASM_THUMB_CC_LE, "le" },
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};
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typedef struct _format_4_op_t { byte op; char name[3]; } format_4_op_t;
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#define X(x) (((x) >> 4) & 0xff) // only need 1 byte to distinguish these ops
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STATIC const format_4_op_t format_4_op_table[] = {
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{ X(ASM_THUMB_FORMAT_4_EOR), "eor" },
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{ X(ASM_THUMB_FORMAT_4_LSL), "lsl" },
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{ X(ASM_THUMB_FORMAT_4_LSR), "lsr" },
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{ X(ASM_THUMB_FORMAT_4_ASR), "asr" },
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{ X(ASM_THUMB_FORMAT_4_ADC), "adc" },
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{ X(ASM_THUMB_FORMAT_4_SBC), "sbc" },
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{ X(ASM_THUMB_FORMAT_4_ROR), "ror" },
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{ X(ASM_THUMB_FORMAT_4_TST), "tst" },
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{ X(ASM_THUMB_FORMAT_4_NEG), "neg" },
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{ X(ASM_THUMB_FORMAT_4_CMP), "cmp" },
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{ X(ASM_THUMB_FORMAT_4_CMN), "cmn" },
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{ X(ASM_THUMB_FORMAT_4_ORR), "orr" },
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{ X(ASM_THUMB_FORMAT_4_MUL), "mul" },
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{ X(ASM_THUMB_FORMAT_4_BIC), "bic" },
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{ X(ASM_THUMB_FORMAT_4_MVN), "mvn" },
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};
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#undef X
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typedef struct _format_9_10_op_t { uint16_t op; char name[5]; } format_9_10_op_t;
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#define X(x) (x)
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STATIC const format_9_10_op_t format_9_10_op_table[] = {
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{ X(ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER), "ldr" },
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{ X(ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER), "ldrb" },
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{ X(ASM_THUMB_FORMAT_10_LDRH), "ldrh" },
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{ X(ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_WORD_TRANSFER), "str" },
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{ X(ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER), "strb" },
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{ X(ASM_THUMB_FORMAT_10_STRH), "strh" },
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};
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#undef X
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STATIC void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, mp_uint_t n_args, mp_parse_node_t *pn_args) {
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// TODO perhaps make two tables:
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// one_args =
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// "b", LAB, asm_thumb_b_n,
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// "bgt", LAB, asm_thumb_bgt_n,
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// two_args =
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// "movs", RLO, I8, asm_thumb_movs_reg_i8
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// "movw", REG, REG, asm_thumb_movw_reg_i16
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// three_args =
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// "subs", RLO, RLO, I3, asm_thumb_subs_reg_reg_i3
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const char *op_str = qstr_str(op);
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mp_uint_t op_len = strlen(op_str);
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if (n_args == 0) {
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if (strcmp(op_str, "nop") == 0) {
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asm_thumb_op16(emit->as, ASM_THUMB_OP_NOP);
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} else if (strcmp(op_str, "wfi") == 0) {
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asm_thumb_op16(emit->as, ASM_THUMB_OP_WFI);
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} else {
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goto unknown_op;
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}
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} else if (n_args == 1) {
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if (strcmp(op_str, "b") == 0) {
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int label_num = get_arg_label(emit, op_str, pn_args[0]);
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if (!asm_thumb_b_n_label(emit->as, label_num)) {
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goto branch_not_in_range;
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}
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} else if (strcmp(op_str, "bl") == 0) {
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int label_num = get_arg_label(emit, op_str, pn_args[0]);
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if (!asm_thumb_bl_label(emit->as, label_num)) {
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goto branch_not_in_range;
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}
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} else if (strcmp(op_str, "bx") == 0) {
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mp_uint_t r = get_arg_reg(emit, op_str, pn_args[0], 15);
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asm_thumb_op16(emit->as, 0x4700 | (r << 3));
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} else if (op_str[0] == 'b' && op_len == 3) {
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mp_uint_t cc = -1;
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for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(cc_name_table); i++) {
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if (op_str[1] == cc_name_table[i].name[0] && op_str[2] == cc_name_table[i].name[1]) {
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cc = cc_name_table[i].cc;
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}
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}
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if (cc == -1) {
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goto unknown_op;
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}
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int label_num = get_arg_label(emit, op_str, pn_args[0]);
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if (!asm_thumb_bcc_n_label(emit->as, cc, label_num)) {
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goto branch_not_in_range;
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}
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} else if (op_str[0] == 'i' && op_str[1] == 't') {
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const char *arg_str = get_arg_str(pn_args[0]);
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mp_uint_t cc = -1;
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for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(cc_name_table); i++) {
|
|
if (arg_str[0] == cc_name_table[i].name[0]
|
|
&& arg_str[1] == cc_name_table[i].name[1]
|
|
&& arg_str[2] == '\0') {
|
|
cc = cc_name_table[i].cc;
|
|
break;
|
|
}
|
|
}
|
|
if (cc == -1) {
|
|
goto unknown_op;
|
|
}
|
|
const char *os = op_str + 2;
|
|
while (*os != '\0') {
|
|
os++;
|
|
}
|
|
if (os > op_str + 5) {
|
|
goto unknown_op;
|
|
}
|
|
mp_uint_t it_mask = 8;
|
|
while (--os >= op_str + 2) {
|
|
it_mask >>= 1;
|
|
if (*os == 't') {
|
|
it_mask |= (cc & 1) << 3;
|
|
} else if (*os == 'e') {
|
|
it_mask |= ((~cc) & 1) << 3;
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
}
|
|
asm_thumb_it_cc(emit->as, cc, it_mask);
|
|
} else if (strcmp(op_str, "cpsid") == 0) {
|
|
// TODO check pn_args[0] == i
|
|
asm_thumb_op16(emit->as, ASM_THUMB_OP_CPSID_I);
|
|
} else if (strcmp(op_str, "cpsie") == 0) {
|
|
// TODO check pn_args[0] == i
|
|
asm_thumb_op16(emit->as, ASM_THUMB_OP_CPSIE_I);
|
|
} else if (strcmp(op_str, "push") == 0) {
|
|
mp_uint_t reglist = get_arg_reglist(emit, op_str, pn_args[0]);
|
|
if ((reglist & 0xff00) == 0) {
|
|
asm_thumb_op16(emit->as, 0xb400 | reglist);
|
|
} else {
|
|
asm_thumb_op32(emit->as, 0xe92d, reglist);
|
|
}
|
|
} else if (strcmp(op_str, "pop") == 0) {
|
|
mp_uint_t reglist = get_arg_reglist(emit, op_str, pn_args[0]);
|
|
if ((reglist & 0xff00) == 0) {
|
|
asm_thumb_op16(emit->as, 0xbc00 | reglist);
|
|
} else {
|
|
asm_thumb_op32(emit->as, 0xe8bd, reglist);
|
|
}
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
|
|
} else if (n_args == 2) {
|
|
if (MP_PARSE_NODE_IS_ID(pn_args[1])) {
|
|
// second arg is a register (or should be)
|
|
mp_uint_t op_code, op_code_hi;
|
|
if (strcmp(op_str, "mov") == 0) {
|
|
mp_uint_t reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
mp_uint_t reg_src = get_arg_reg(emit, op_str, pn_args[1], 15);
|
|
asm_thumb_mov_reg_reg(emit->as, reg_dest, reg_src);
|
|
} else if (strcmp(op_str, "clz") == 0) {
|
|
op_code_hi = 0xfab0;
|
|
op_code = 0xf080;
|
|
mp_uint_t rd, rm;
|
|
op_clz_rbit:
|
|
rd = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
rm = get_arg_reg(emit, op_str, pn_args[1], 15);
|
|
asm_thumb_op32(emit->as, op_code_hi | rm, op_code | (rd << 8) | rm);
|
|
} else if (strcmp(op_str, "rbit") == 0) {
|
|
op_code_hi = 0xfa90;
|
|
op_code = 0xf0a0;
|
|
goto op_clz_rbit;
|
|
} else {
|
|
if (strcmp(op_str, "and_") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_4_AND;
|
|
mp_uint_t reg_dest, reg_src;
|
|
op_format_4:
|
|
reg_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
|
|
reg_src = get_arg_reg(emit, op_str, pn_args[1], 7);
|
|
asm_thumb_format_4(emit->as, op_code, reg_dest, reg_src);
|
|
return;
|
|
}
|
|
// search table for ALU ops
|
|
for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(format_4_op_table); i++) {
|
|
if (strncmp(op_str, format_4_op_table[i].name, 3) == 0 && op_str[3] == '\0') {
|
|
op_code = 0x4000 | (format_4_op_table[i].op << 4);
|
|
goto op_format_4;
|
|
}
|
|
}
|
|
goto unknown_op;
|
|
}
|
|
} else {
|
|
// second arg is not a register
|
|
mp_uint_t op_code;
|
|
if (strcmp(op_str, "mov") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_3_MOV;
|
|
mp_uint_t rlo_dest, i8_src;
|
|
op_format_3:
|
|
rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
|
|
i8_src = get_arg_i(emit, op_str, pn_args[1], 0xff);
|
|
asm_thumb_format_3(emit->as, op_code, rlo_dest, i8_src);
|
|
} else if (strcmp(op_str, "cmp") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_3_CMP;
|
|
goto op_format_3;
|
|
} else if (strcmp(op_str, "add") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_3_ADD;
|
|
goto op_format_3;
|
|
} else if (strcmp(op_str, "sub") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_3_SUB;
|
|
goto op_format_3;
|
|
} else if (strcmp(op_str, "movw") == 0) {
|
|
op_code = ASM_THUMB_OP_MOVW;
|
|
mp_uint_t reg_dest;
|
|
op_movw_movt:
|
|
reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
int i_src = get_arg_i(emit, op_str, pn_args[1], 0xffff);
|
|
asm_thumb_mov_reg_i16(emit->as, op_code, reg_dest, i_src);
|
|
} else if (strcmp(op_str, "movt") == 0) {
|
|
op_code = ASM_THUMB_OP_MOVT;
|
|
goto op_movw_movt;
|
|
} else if (strcmp(op_str, "movwt") == 0) {
|
|
// this is a convenience instruction
|
|
// we clear the MSB since it might be set from extracting the small int value
|
|
mp_uint_t reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
int i_src = get_arg_i(emit, op_str, pn_args[1], 0xffffffff);
|
|
asm_thumb_mov_reg_i16(emit->as, ASM_THUMB_OP_MOVW, reg_dest, i_src & 0xffff);
|
|
asm_thumb_mov_reg_i16(emit->as, ASM_THUMB_OP_MOVT, reg_dest, (i_src >> 16) & 0x7fff);
|
|
} else if (strcmp(op_str, "ldrex") == 0) {
|
|
mp_uint_t r_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
mp_parse_node_t pn_base, pn_offset;
|
|
if (get_arg_addr(emit, op_str, pn_args[1], &pn_base, &pn_offset)) {
|
|
mp_uint_t r_base = get_arg_reg(emit, op_str, pn_base, 15);
|
|
mp_uint_t i8 = get_arg_i(emit, op_str, pn_offset, 0xff) >> 2;
|
|
asm_thumb_op32(emit->as, 0xe850 | r_base, 0x0f00 | (r_dest << 12) | i8);
|
|
}
|
|
} else {
|
|
// search table for ldr/str instructions
|
|
for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(format_9_10_op_table); i++) {
|
|
if (strcmp(op_str, format_9_10_op_table[i].name) == 0) {
|
|
op_code = format_9_10_op_table[i].op;
|
|
mp_parse_node_t pn_base, pn_offset;
|
|
mp_uint_t rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
|
|
if (get_arg_addr(emit, op_str, pn_args[1], &pn_base, &pn_offset)) {
|
|
mp_uint_t rlo_base = get_arg_reg(emit, op_str, pn_base, 7);
|
|
mp_uint_t i5;
|
|
if (op_code & ASM_THUMB_FORMAT_9_BYTE_TRANSFER) {
|
|
i5 = get_arg_i(emit, op_str, pn_offset, 0x1f);
|
|
} else if (op_code & ASM_THUMB_FORMAT_10_STRH) { // also catches LDRH
|
|
i5 = get_arg_i(emit, op_str, pn_offset, 0x3e) >> 1;
|
|
} else {
|
|
i5 = get_arg_i(emit, op_str, pn_offset, 0x7c) >> 2;
|
|
}
|
|
asm_thumb_format_9_10(emit->as, op_code, rlo_dest, rlo_base, i5);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
goto unknown_op;
|
|
}
|
|
}
|
|
|
|
} else if (n_args == 3) {
|
|
mp_uint_t op_code;
|
|
if (strcmp(op_str, "add") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_2_ADD;
|
|
mp_uint_t rlo_dest, rlo_src;
|
|
op_format_2:
|
|
rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
|
|
rlo_src = get_arg_reg(emit, op_str, pn_args[1], 7);
|
|
int src_b;
|
|
if (MP_PARSE_NODE_IS_ID(pn_args[2])) {
|
|
op_code |= ASM_THUMB_FORMAT_2_REG_OPERAND;
|
|
src_b = get_arg_reg(emit, op_str, pn_args[2], 7);
|
|
} else {
|
|
op_code |= ASM_THUMB_FORMAT_2_IMM_OPERAND;
|
|
src_b = get_arg_i(emit, op_str, pn_args[2], 0x7);
|
|
}
|
|
asm_thumb_format_2(emit->as, op_code, rlo_dest, rlo_src, src_b);
|
|
} else if (strcmp(op_str, "sdiv") == 0) {
|
|
op_code = 0xfb90; // sdiv high part
|
|
mp_uint_t rd, rn, rm;
|
|
op_sdiv_udiv:
|
|
rd = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
rn = get_arg_reg(emit, op_str, pn_args[1], 15);
|
|
rm = get_arg_reg(emit, op_str, pn_args[2], 15);
|
|
asm_thumb_op32(emit->as, op_code | rn, 0xf0f0 | (rd << 8) | rm);
|
|
} else if (strcmp(op_str, "udiv") == 0) {
|
|
op_code = 0xfbb0; // udiv high part
|
|
goto op_sdiv_udiv;
|
|
} else if (strcmp(op_str, "sub") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_2_SUB;
|
|
goto op_format_2;
|
|
} else if (strcmp(op_str, "strex") == 0) {
|
|
mp_uint_t r_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
|
|
mp_uint_t r_src = get_arg_reg(emit, op_str, pn_args[1], 15);
|
|
mp_parse_node_t pn_base, pn_offset;
|
|
if (get_arg_addr(emit, op_str, pn_args[2], &pn_base, &pn_offset)) {
|
|
mp_uint_t r_base = get_arg_reg(emit, op_str, pn_base, 15);
|
|
mp_uint_t i8 = get_arg_i(emit, op_str, pn_offset, 0xff) >> 2;
|
|
asm_thumb_op32(emit->as, 0xe840 | r_base, (r_src << 12) | (r_dest << 8) | i8);
|
|
}
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
|
|
return;
|
|
|
|
unknown_op:
|
|
emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "unsupported Thumb instruction '%s' with %d arguments", op_str, n_args));
|
|
return;
|
|
|
|
branch_not_in_range:
|
|
emit_inline_thumb_error_msg(emit, "branch not in range");
|
|
return;
|
|
}
|
|
|
|
const emit_inline_asm_method_table_t emit_inline_thumb_method_table = {
|
|
emit_inline_thumb_start_pass,
|
|
emit_inline_thumb_end_pass,
|
|
emit_inline_thumb_count_params,
|
|
emit_inline_thumb_label,
|
|
emit_inline_thumb_align,
|
|
emit_inline_thumb_data,
|
|
emit_inline_thumb_op,
|
|
};
|
|
|
|
#endif // MICROPY_EMIT_INLINE_THUMB
|