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413 lines
16 KiB
413 lines
16 KiB
#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 "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "lexer.h"
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#include "parse.h"
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#include "scope.h"
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#include "runtime0.h"
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#include "emit.h"
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#include "emitglue.h"
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#include "asmthumb.h"
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#if MICROPY_EMIT_INLINE_THUMB
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typedef enum {
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PN_none = 0,
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#define DEF_RULE(rule, comp, kind, ...) PN_##rule,
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#include "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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uint16_t success;
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scope_t *scope;
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uint 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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void emit_inline_thumb_error(emit_inline_asm_t *emit, const char *fmt, ...) {
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printf("SyntaxError: ");
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emit->success = false;
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va_list ap;
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va_start(ap, fmt);
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vprintf(fmt, ap);
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va_end(ap);
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}
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emit_inline_asm_t *emit_inline_thumb_new(uint 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) {
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emit->pass = pass;
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emit->success = true;
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emit->scope = scope;
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asm_thumb_start_pass(emit->as, pass);
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asm_thumb_entry(emit->as, 0);
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}
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STATIC bool 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 == PASS_3) {
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void *f = asm_thumb_get_code(emit->as);
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mp_emit_glue_assign_inline_asm_code(emit->scope->unique_code_id, f, asm_thumb_get_code_size(emit->as), emit->scope->num_params);
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}
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return emit->success;
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}
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STATIC int emit_inline_thumb_count_params(emit_inline_asm_t *emit, int n_params, mp_parse_node_t *pn_params) {
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if (n_params > 4) {
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emit_inline_thumb_error(emit, "can only have up to 4 parameters to inline thumb assembly\n");
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return 0;
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}
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for (int 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(emit, "parameter to inline assembler must be an identifier\n");
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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(emit, "parameter %d to inline assembler must be r%d\n", i + 1, i);
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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, uint 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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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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STATIC uint get_arg_reg(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, uint max_reg) {
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if (MP_PARSE_NODE_IS_ID(pn)) {
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qstr reg_qstr = MP_PARSE_NODE_LEAF_ARG(pn);
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const char *reg_str = qstr_str(reg_qstr);
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for (uint i = 0; i < sizeof(reg_name_table) / sizeof(reg_name_table[0]); i++) {
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const reg_name_t *r = ®_name_table[i];
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if (reg_str[0] == r->name[0] && reg_str[1] == r->name[1] && reg_str[2] == r->name[2] && (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(emit, "'%s' expects at most r%d\n", 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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}
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emit_inline_thumb_error(emit, "'%s' expects a register\n", 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(emit, "'%s' expects an integer\n", 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(emit, "'%s' integer 0x%x does not fit in mask 0x%x\n", 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(emit, "'%s' expects an address of the form [a, b]\n", 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(emit, "'%s' expects a label\n", 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 == PASS_3) {
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emit_inline_thumb_error(emit, "label '%s' not defined\n", 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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{THUMB_CC_EQ, "eq"},
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{THUMB_CC_NE, "ne"},
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{THUMB_CC_CS, "cs"},
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{THUMB_CC_CC, "cc"},
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{THUMB_CC_MI, "mi"},
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{THUMB_CC_PL, "pl"},
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{THUMB_CC_VS, "vs"},
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{THUMB_CC_VC, "vc"},
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{THUMB_CC_HI, "hi"},
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{THUMB_CC_LS, "ls"},
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{THUMB_CC_GE, "ge"},
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{THUMB_CC_LT, "lt"},
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{THUMB_CC_GT, "gt"},
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{THUMB_CC_LE, "le"},
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};
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STATIC void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int 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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uint op_len = strlen(op_str);
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if (n_args == 0) {
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if (strcmp(op_str, "ite.ge") == 0) { // TODO correct name for this op?
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asm_thumb_ite_ge(emit->as);
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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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// TODO check that this succeeded, ie branch was within range
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asm_thumb_b_n(emit->as, label_num);
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} else if (op_str[0] == 'b' && op_len == 3) {
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uint cc = -1;
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for (uint i = 0; i < (sizeof cc_name_table) / (sizeof cc_name_table[0]); 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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// TODO check that this succeeded, ie branch was within range
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asm_thumb_bcc_n(emit->as, cc, label_num);
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} else {
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goto unknown_op;
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}
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} else if (n_args == 2) {
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if (MP_PARSE_NODE_IS_ID(pn_args[1])) {
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// second arg is a register (or should be)
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uint op_code;
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if (strcmp(op_str, "mov") == 0) {
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uint reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
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uint reg_src = get_arg_reg(emit, op_str, pn_args[1], 15);
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asm_thumb_mov_reg_reg(emit->as, reg_dest, reg_src);
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} else if (strcmp(op_str, "and") == 0) {
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op_code = ASM_THUMB_FORMAT_4_AND;
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uint reg_dest, reg_src;
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op_format_4:
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reg_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
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reg_src = get_arg_reg(emit, op_str, pn_args[1], 7);
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asm_thumb_format_4(emit->as, op_code, reg_dest, reg_src);
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// TODO probably uses less ROM if these ops are in a lookup table
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} else if (strcmp(op_str, "and") == 0) { op_code = ASM_THUMB_FORMAT_4_AND; goto op_format_4;
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} else if (strcmp(op_str, "eor") == 0) { op_code = ASM_THUMB_FORMAT_4_EOR; goto op_format_4;
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} else if (strcmp(op_str, "lsl") == 0) { op_code = ASM_THUMB_FORMAT_4_LSL; goto op_format_4;
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} else if (strcmp(op_str, "lsr") == 0) { op_code = ASM_THUMB_FORMAT_4_LSR; goto op_format_4;
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} else if (strcmp(op_str, "asr") == 0) { op_code = ASM_THUMB_FORMAT_4_ASR; goto op_format_4;
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} else if (strcmp(op_str, "adc") == 0) { op_code = ASM_THUMB_FORMAT_4_ADC; goto op_format_4;
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} else if (strcmp(op_str, "sbc") == 0) { op_code = ASM_THUMB_FORMAT_4_SBC; goto op_format_4;
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} else if (strcmp(op_str, "ror") == 0) { op_code = ASM_THUMB_FORMAT_4_ROR; goto op_format_4;
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} else if (strcmp(op_str, "tst") == 0) { op_code = ASM_THUMB_FORMAT_4_TST; goto op_format_4;
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} else if (strcmp(op_str, "neg") == 0) { op_code = ASM_THUMB_FORMAT_4_NEG; goto op_format_4;
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} else if (strcmp(op_str, "cmp") == 0) { op_code = ASM_THUMB_FORMAT_4_CMP; goto op_format_4;
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} else if (strcmp(op_str, "cmn") == 0) { op_code = ASM_THUMB_FORMAT_4_CMN; goto op_format_4;
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} else if (strcmp(op_str, "orr") == 0) { op_code = ASM_THUMB_FORMAT_4_ORR; goto op_format_4;
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} else if (strcmp(op_str, "mul") == 0) { op_code = ASM_THUMB_FORMAT_4_MUL; goto op_format_4;
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} else if (strcmp(op_str, "bic") == 0) { op_code = ASM_THUMB_FORMAT_4_BIC; goto op_format_4;
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} else if (strcmp(op_str, "mvn") == 0) { op_code = ASM_THUMB_FORMAT_4_MVN; goto op_format_4;
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} else {
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goto unknown_op;
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}
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} else {
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// second arg is not a register
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uint op_code;
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if (strcmp(op_str, "mov") == 0) {
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op_code = ASM_THUMB_FORMAT_3_MOV;
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uint rlo_dest, i8_src;
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op_format_3:
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rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
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i8_src = get_arg_i(emit, op_str, pn_args[1], 0xff);
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asm_thumb_format_3(emit->as, op_code, rlo_dest, i8_src);
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} else if (strcmp(op_str, "cmp") == 0) {
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op_code = ASM_THUMB_FORMAT_3_CMP;
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goto op_format_3;
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} else if (strcmp(op_str, "add") == 0) {
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op_code = ASM_THUMB_FORMAT_3_ADD;
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goto op_format_3;
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} else if (strcmp(op_str, "sub") == 0) {
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op_code = ASM_THUMB_FORMAT_3_SUB;
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goto op_format_3;
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} else if (strcmp(op_str, "movw") == 0) {
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uint reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
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int i_src = get_arg_i(emit, op_str, pn_args[1], 0xffff);
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asm_thumb_movw_reg_i16(emit->as, reg_dest, i_src);
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} else if (strcmp(op_str, "movt") == 0) {
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uint reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
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int i_src = get_arg_i(emit, op_str, pn_args[1], 0xffff);
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asm_thumb_movt_reg_i16(emit->as, reg_dest, i_src);
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} else if (strcmp(op_str, "movwt") == 0) {
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// this is a convenience instruction
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// we clear the MSB since it might be set from extracting the small int value
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uint reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15);
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int i_src = get_arg_i(emit, op_str, pn_args[1], 0xffffffff);
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asm_thumb_movw_reg_i16(emit->as, reg_dest, i_src & 0xffff);
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asm_thumb_movt_reg_i16(emit->as, reg_dest, (i_src >> 16) & 0x7fff);
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} else if (strcmp(op_str, "ldr") == 0) {
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op_code = ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER;
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uint rlo_dest, rlo_base, i5;
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mp_parse_node_t pn_base, pn_offset;
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op_format_9_10:
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rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7);
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if (get_arg_addr(emit, op_str, pn_args[1], &pn_base, &pn_offset)) {
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rlo_base = get_arg_reg(emit, op_str, pn_base, 7);
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if (op_code & ASM_THUMB_FORMAT_9_BYTE_TRANSFER) {
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i5 = get_arg_i(emit, op_str, pn_offset, 0x1f);
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} else if (op_code & ASM_THUMB_FORMAT_10_STRH) { // also catches LDRH
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i5 = get_arg_i(emit, op_str, pn_offset, 0x3e) >> 1;
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} else {
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i5 = get_arg_i(emit, op_str, pn_offset, 0x7c) >> 2;
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}
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asm_thumb_format_9_10(emit->as, op_code, rlo_dest, rlo_base, i5);
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}
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} else if (strcmp(op_str, "ldrb") == 0) {
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op_code = ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER;
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goto op_format_9_10;
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} else if (strcmp(op_str, "ldrh") == 0) {
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op_code = ASM_THUMB_FORMAT_10_LDRH;
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goto op_format_9_10;
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} else if (strcmp(op_str, "str") == 0) {
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op_code = ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_WORD_TRANSFER;
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goto op_format_9_10;
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} else if (strcmp(op_str, "strb") == 0) {
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op_code = ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER;
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goto op_format_9_10;
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} else if (strcmp(op_str, "strh") == 0) {
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op_code = ASM_THUMB_FORMAT_10_STRH;
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goto op_format_9_10;
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} else {
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goto unknown_op;
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}
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}
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} else if (n_args == 3) {
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uint op_code;
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if (strcmp(op_str, "add") == 0) {
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op_code = ASM_THUMB_FORMAT_2_ADD;
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uint rlo_dest, rlo_src;
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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, "sub") == 0) {
|
|
op_code = ASM_THUMB_FORMAT_2_SUB;
|
|
goto op_format_2;
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
|
|
} else {
|
|
goto unknown_op;
|
|
}
|
|
|
|
return;
|
|
|
|
unknown_op:
|
|
emit_inline_thumb_error(emit, "unsupported Thumb instruction '%s' with %d arguments\n", op_str, n_args);
|
|
}
|
|
|
|
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_op,
|
|
};
|
|
|
|
#endif // MICROPY_EMIT_INLINE_THUMB
|
|
|