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-rw-r--r--py/emitinlinethumb.c61
1 files changed, 41 insertions, 20 deletions
diff --git a/py/emitinlinethumb.c b/py/emitinlinethumb.c
index 9950f4a330..1e739a34d7 100644
--- a/py/emitinlinethumb.c
+++ b/py/emitinlinethumb.c
@@ -50,6 +50,25 @@ static void emit_inline_thumb_end_pass(emit_inline_asm_t *emit) {
}
}
+static int emit_inline_thumb_count_params(emit_inline_asm_t *emit, int n_params, py_parse_node_t *pn_params) {
+ if (n_params > 4) {
+ printf("SyntaxError: can only have up to 3 parameters to inline assembler\n");
+ return 0;
+ }
+ for (int i = 0; i < n_params; i++) {
+ if (!PY_PARSE_NODE_IS_ID(pn_params[i])) {
+ printf("SyntaxError: parameter to inline assembler must be an identifier %d\n", PY_PARSE_NODE_STRUCT_KIND((py_parse_node_struct_t*)pn_params[i]));
+ return 0;
+ }
+ const char *p = qstr_str(PY_PARSE_NODE_LEAF_ARG(pn_params[i]));
+ if (!(strlen(p) == 2 && p[0] == 'r' && p[1] == '0' + i)) {
+ printf("SyntaxError: parameter %d to inline assembler must be r%d\n", i, i);
+ return 0;
+ }
+ }
+ return n_params;
+}
+
static void emit_inline_thumb_label(emit_inline_asm_t *emit, int label_num, qstr label_id) {
assert(label_num < emit->max_num_labels);
emit->label_lookup[label_num] = label_id;
@@ -65,12 +84,12 @@ static bool check_n_arg(qstr op, int n_args, int wanted_n_args) {
}
}
-static uint get_arg_rlo(qstr op, py_parse_node_t *pn_arg, int wanted_arg_num) {
- if (!PY_PARSE_NODE_IS_ID(pn_arg[wanted_arg_num])) {
+static uint get_arg_rlo(qstr op, py_parse_node_t *pn_args, int wanted_arg_num) {
+ if (!PY_PARSE_NODE_IS_ID(pn_args[wanted_arg_num])) {
printf("SyntaxError: '%s' expects a register in position %d\n", qstr_str(op), wanted_arg_num);
return 0;
}
- qstr reg_qstr = PY_PARSE_NODE_LEAF_ARG(pn_arg[wanted_arg_num]);
+ qstr reg_qstr = PY_PARSE_NODE_LEAF_ARG(pn_args[wanted_arg_num]);
const char *reg_str = qstr_str(reg_qstr);
if (!(strlen(reg_str) == 2 && reg_str[0] == 'r' && ('0' <= reg_str[1] && reg_str[1] <= '7'))) {
printf("SyntaxError: '%s' expects a register in position %d\n", qstr_str(op), wanted_arg_num);
@@ -79,12 +98,12 @@ static uint get_arg_rlo(qstr op, py_parse_node_t *pn_arg, int wanted_arg_num) {
return reg_str[1] - '0';
}
-static int get_arg_i(qstr op, py_parse_node_t *pn_arg, int wanted_arg_num, int fit_mask) {
- if (!PY_PARSE_NODE_IS_SMALL_INT(pn_arg[wanted_arg_num])) {
+static int get_arg_i(qstr op, py_parse_node_t *pn_args, int wanted_arg_num, int fit_mask) {
+ if (!PY_PARSE_NODE_IS_SMALL_INT(pn_args[wanted_arg_num])) {
printf("SyntaxError: '%s' expects an integer in position %d\n", qstr_str(op), wanted_arg_num);
return 0;
}
- int i = PY_PARSE_NODE_LEAF_ARG(pn_arg[wanted_arg_num]);
+ int i = PY_PARSE_NODE_LEAF_ARG(pn_args[wanted_arg_num]);
if ((i & (~fit_mask)) != 0) {
printf("SyntaxError: '%s' integer 0x%x does not fit in mask 0x%x\n", qstr_str(op), i, fit_mask);
return 0;
@@ -92,12 +111,12 @@ static int get_arg_i(qstr op, py_parse_node_t *pn_arg, int wanted_arg_num, int f
return i;
}
-static int get_arg_label(emit_inline_asm_t *emit, qstr op, py_parse_node_t *pn_arg, int wanted_arg_num) {
- if (!PY_PARSE_NODE_IS_ID(pn_arg[wanted_arg_num])) {
+static int get_arg_label(emit_inline_asm_t *emit, qstr op, py_parse_node_t *pn_args, int wanted_arg_num) {
+ if (!PY_PARSE_NODE_IS_ID(pn_args[wanted_arg_num])) {
printf("SyntaxError: '%s' expects a label in position %d\n", qstr_str(op), wanted_arg_num);
return 0;
}
- qstr label_qstr = PY_PARSE_NODE_LEAF_ARG(pn_arg[wanted_arg_num]);
+ qstr label_qstr = PY_PARSE_NODE_LEAF_ARG(pn_args[wanted_arg_num]);
for (int i = 0; i < emit->max_num_labels; i++) {
if (emit->label_lookup[i] == label_qstr) {
return i;
@@ -107,7 +126,7 @@ static int get_arg_label(emit_inline_asm_t *emit, qstr op, py_parse_node_t *pn_a
return 0;
}
-static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, py_parse_node_t *pn_arg) {
+static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, py_parse_node_t *pn_args) {
// TODO perhaps make two tables:
// two_args =
// "movs", RLO, I8, asm_thumb_movs_reg_i8
@@ -120,7 +139,8 @@ static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, p
if (!check_n_arg(op, n_args, 1)) {
return;
}
- int label_num = get_arg_label(emit, op, pn_arg, 0);
+ int label_num = get_arg_label(emit, op, pn_args, 0);
+ // TODO check that this succeeded, ie branch was within range
asm_thumb_bgt_n(emit->as, label_num);
// 2 args
@@ -128,22 +148,22 @@ static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, p
if (!check_n_arg(op, n_args, 2)) {
return;
}
- uint rlo_dest = get_arg_rlo(op, pn_arg, 0);
- int i_src = get_arg_i(op, pn_arg, 1, 0xff);
+ uint rlo_dest = get_arg_rlo(op, pn_args, 0);
+ int i_src = get_arg_i(op, pn_args, 1, 0xff);
asm_thumb_movs_rlo_i8(emit->as, rlo_dest, i_src);
} else if (strcmp(qstr_str(op), "movw") == 0) {
if (!check_n_arg(op, n_args, 2)) {
return;
}
- uint rlo_dest = get_arg_rlo(op, pn_arg, 0); // TODO can be reg lo or hi
- int i_src = get_arg_i(op, pn_arg, 1, 0xffff);
+ uint rlo_dest = get_arg_rlo(op, pn_args, 0); // TODO can be reg lo or hi
+ int i_src = get_arg_i(op, pn_args, 1, 0xffff);
asm_thumb_movw_reg_i16(emit->as, rlo_dest, i_src);
} else if (strcmp(qstr_str(op), "cmp") == 0) {
if (!check_n_arg(op, n_args, 2)) {
return;
}
- uint rlo = get_arg_rlo(op, pn_arg, 0);
- int i8 = get_arg_i(op, pn_arg, 1, 0xff);
+ uint rlo = get_arg_rlo(op, pn_args, 0);
+ int i8 = get_arg_i(op, pn_args, 1, 0xff);
asm_thumb_cmp_rlo_i8(emit->as, rlo, i8);
// 3 args
@@ -151,9 +171,9 @@ static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, p
if (!check_n_arg(op, n_args, 3)) {
return;
}
- uint rlo_dest = get_arg_rlo(op, pn_arg, 0);
- uint rlo_src = get_arg_rlo(op, pn_arg, 1);
- int i3_src = get_arg_i(op, pn_arg, 2, 0x7);
+ uint rlo_dest = get_arg_rlo(op, pn_args, 0);
+ uint rlo_src = get_arg_rlo(op, pn_args, 1);
+ int i3_src = get_arg_i(op, pn_args, 2, 0x7);
asm_thumb_subs_rlo_rlo_i3(emit->as, rlo_dest, rlo_src, i3_src);
// unknown op
@@ -166,6 +186,7 @@ static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, p
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,
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-30 16:15:56 +0000