| /* |
| * This file is part of the Micro Python project, http://micropython.org/ |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2013, 2014 Damien P. George |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdarg.h> |
| #include <assert.h> |
| |
| #include "py/emit.h" |
| #include "py/asmthumb.h" |
| |
| #if MICROPY_EMIT_INLINE_THUMB |
| |
| typedef enum { |
| #define DEF_RULE(rule, comp, kind, ...) PN_##rule, |
| #include "py/grammar.h" |
| #undef DEF_RULE |
| PN_maximum_number_of, |
| } pn_kind_t; |
| |
| struct _emit_inline_asm_t { |
| uint16_t pass; |
| scope_t *scope; |
| mp_obj_t *error_slot; |
| mp_uint_t max_num_labels; |
| qstr *label_lookup; |
| asm_thumb_t *as; |
| }; |
| |
| STATIC void emit_inline_thumb_error_msg(emit_inline_asm_t *emit, const char *msg) { |
| *emit->error_slot = mp_obj_new_exception_msg(&mp_type_SyntaxError, msg); |
| } |
| |
| STATIC void emit_inline_thumb_error_exc(emit_inline_asm_t *emit, mp_obj_t exc) { |
| *emit->error_slot = exc; |
| } |
| |
| emit_inline_asm_t *emit_inline_thumb_new(mp_uint_t max_num_labels) { |
| emit_inline_asm_t *emit = m_new_obj(emit_inline_asm_t); |
| emit->max_num_labels = max_num_labels; |
| emit->label_lookup = m_new(qstr, max_num_labels); |
| emit->as = asm_thumb_new(max_num_labels); |
| return emit; |
| } |
| |
| void emit_inline_thumb_free(emit_inline_asm_t *emit) { |
| m_del(qstr, emit->label_lookup, emit->max_num_labels); |
| asm_thumb_free(emit->as, false); |
| m_del_obj(emit_inline_asm_t, emit); |
| } |
| |
| STATIC void emit_inline_thumb_start_pass(emit_inline_asm_t *emit, pass_kind_t pass, scope_t *scope, mp_obj_t *error_slot) { |
| emit->pass = pass; |
| emit->scope = scope; |
| emit->error_slot = error_slot; |
| if (emit->pass == MP_PASS_CODE_SIZE) { |
| memset(emit->label_lookup, 0, emit->max_num_labels * sizeof(qstr)); |
| } |
| asm_thumb_start_pass(emit->as, pass == MP_PASS_EMIT ? ASM_THUMB_PASS_EMIT : ASM_THUMB_PASS_COMPUTE); |
| asm_thumb_entry(emit->as, 0); |
| } |
| |
| STATIC void emit_inline_thumb_end_pass(emit_inline_asm_t *emit, mp_uint_t type_sig) { |
| asm_thumb_exit(emit->as); |
| asm_thumb_end_pass(emit->as); |
| |
| if (emit->pass == MP_PASS_EMIT) { |
| void *f = asm_thumb_get_code(emit->as); |
| mp_emit_glue_assign_native(emit->scope->raw_code, MP_CODE_NATIVE_ASM, f, |
| asm_thumb_get_code_size(emit->as), NULL, emit->scope->num_pos_args, 0, type_sig); |
| } |
| } |
| |
| 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) { |
| if (n_params > 4) { |
| emit_inline_thumb_error_msg(emit, "can only have up to 4 parameters to Thumb assembly"); |
| return 0; |
| } |
| for (mp_uint_t i = 0; i < n_params; i++) { |
| if (!MP_PARSE_NODE_IS_ID(pn_params[i])) { |
| emit_inline_thumb_error_msg(emit, "parameters must be registers in sequence r0 to r3"); |
| return 0; |
| } |
| const char *p = qstr_str(MP_PARSE_NODE_LEAF_ARG(pn_params[i])); |
| if (!(strlen(p) == 2 && p[0] == 'r' && p[1] == '0' + i)) { |
| emit_inline_thumb_error_msg(emit, "parameters must be registers in sequence r0 to r3"); |
| return 0; |
| } |
| } |
| return n_params; |
| } |
| |
| STATIC bool emit_inline_thumb_label(emit_inline_asm_t *emit, mp_uint_t label_num, qstr label_id) { |
| assert(label_num < emit->max_num_labels); |
| if (emit->pass == MP_PASS_CODE_SIZE) { |
| // check for duplicate label on first pass |
| for (uint i = 0; i < emit->max_num_labels; i++) { |
| if (emit->label_lookup[i] == label_id) { |
| return false; |
| } |
| } |
| } |
| emit->label_lookup[label_num] = label_id; |
| asm_thumb_label_assign(emit->as, label_num); |
| return true; |
| } |
| |
| STATIC void emit_inline_thumb_align(emit_inline_asm_t *emit, mp_uint_t align) { |
| asm_thumb_align(emit->as, align); |
| } |
| |
| STATIC void emit_inline_thumb_data(emit_inline_asm_t *emit, mp_uint_t bytesize, mp_uint_t val) { |
| asm_thumb_data(emit->as, bytesize, val); |
| } |
| |
| typedef struct _reg_name_t { byte reg; byte name[3]; } reg_name_t; |
| STATIC const reg_name_t reg_name_table[] = { |
| {0, "r0\0"}, |
| {1, "r1\0"}, |
| {2, "r2\0"}, |
| {3, "r3\0"}, |
| {4, "r4\0"}, |
| {5, "r5\0"}, |
| {6, "r6\0"}, |
| {7, "r7\0"}, |
| {8, "r8\0"}, |
| {9, "r9\0"}, |
| {10, "r10"}, |
| {11, "r11"}, |
| {12, "r12"}, |
| {13, "r13"}, |
| {14, "r14"}, |
| {15, "r15"}, |
| {10, "sl\0"}, |
| {11, "fp\0"}, |
| {13, "sp\0"}, |
| {14, "lr\0"}, |
| {15, "pc\0"}, |
| }; |
| |
| #define MAX_SPECIAL_REGISTER_NAME_LENGTH 7 |
| typedef struct _special_reg_name_t { byte reg; char name[MAX_SPECIAL_REGISTER_NAME_LENGTH + 1]; } special_reg_name_t; |
| STATIC const special_reg_name_t special_reg_name_table[] = { |
| {5, "IPSR"}, |
| {17, "BASEPRI"}, |
| }; |
| |
| // return empty string in case of error, so we can attempt to parse the string |
| // without a special check if it was in fact a string |
| STATIC const char *get_arg_str(mp_parse_node_t pn) { |
| if (MP_PARSE_NODE_IS_ID(pn)) { |
| qstr qst = MP_PARSE_NODE_LEAF_ARG(pn); |
| return qstr_str(qst); |
| } else { |
| return ""; |
| } |
| } |
| |
| 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) { |
| const char *reg_str = get_arg_str(pn); |
| for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(reg_name_table); i++) { |
| const reg_name_t *r = ®_name_table[i]; |
| 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')) { |
| if (r->reg > max_reg) { |
| emit_inline_thumb_error_exc(emit, |
| mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, |
| "'%s' expects at most r%d", op, max_reg)); |
| return 0; |
| } else { |
| return r->reg; |
| } |
| } |
| } |
| emit_inline_thumb_error_exc(emit, |
| mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, |
| "'%s' expects a register", op)); |
| return 0; |
| } |
| |
| STATIC mp_uint_t get_arg_special_reg(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) { |
| const char *reg_str = get_arg_str(pn); |
| for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(special_reg_name_table); i++) { |
| const special_reg_name_t *r = &special_reg_name_table[i]; |
| if (strcmp(r->name, reg_str) == 0) { |
| return r->reg; |
| } |
| } |
| emit_inline_thumb_error_exc(emit, |
| mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, |
| "'%s' expects a special register", op)); |
| return 0; |
| } |
| |
| #if MICROPY_EMIT_INLINE_THUMB_FLOAT |
| STATIC mp_uint_t get_arg_vfpreg(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) { |
| const char *reg_str = get_arg_str(pn); |
| if (reg_str[0] == 's' && reg_str[1] != '\0') { |
| mp_uint_t regno = 0; |
| for (++reg_str; *reg_str; ++reg_str) { |
| mp_uint_t v = *reg_str; |
| if (!('0' <= v && v <= '9')) { |
| goto malformed; |
| } |
| regno = 10 * regno + v - '0'; |
| } |
| if (regno > 31) { |
| emit_inline_thumb_error_exc(emit, |
| mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, |
| "'%s' expects at most r%d", op, 31)); |
| return 0; |
| } else { |
| return regno; |
| } |
| } |
| malformed: |
| emit_inline_thumb_error_exc(emit, |
| mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, |
| "'%s' expects an FPU register", op)); |
| return 0; |
| } |
| #endif |
| |
| STATIC mp_uint_t get_arg_reglist(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) { |
| // a register list looks like {r0, r1, r2} and is parsed as a Python set |
| |
| if (!MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_atom_brace)) { |
| goto bad_arg; |
| } |
| |
| mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn; |
| assert(MP_PARSE_NODE_STRUCT_NUM_NODES(pns) == 1); // should always be |
| pn = pns->nodes[0]; |
| |
| mp_uint_t reglist = 0; |
| |
| if (MP_PARSE_NODE_IS_ID(pn)) { |
| // set with one element |
| reglist |= 1 << get_arg_reg(emit, op, pn, 15); |
| } else if (MP_PARSE_NODE_IS_STRUCT(pn)) { |
| pns = (mp_parse_node_struct_t*)pn; |
| if (MP_PARSE_NODE_STRUCT_KIND(pns) == PN_dictorsetmaker) { |
| assert(MP_PARSE_NODE_IS_STRUCT(pns->nodes[1])); // should succeed |
| mp_parse_node_struct_t *pns1 = (mp_parse_node_struct_t*)pns->nodes[1]; |
| if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_dictorsetmaker_list) { |
| // set with multiple elements |
| |
| // get first element of set (we rely on get_arg_reg to catch syntax errors) |
| reglist |= 1 << get_arg_reg(emit, op, pns->nodes[0], 15); |
| |
| // get tail elements (2nd, 3rd, ...) |
| mp_parse_node_t *nodes; |
| int n = mp_parse_node_extract_list(&pns1->nodes[0], PN_dictorsetmaker_list2, &nodes); |
| |
| // process rest of elements |
| for (int i = 0; i < n; i++) { |
| reglist |= 1 << get_arg_reg(emit, op, nodes[i], 15); |
| } |
| } else { |
| goto bad_arg; |
| } |
| } else { |
| goto bad_arg; |
| } |
| } else { |
| goto bad_arg; |
| } |
| |
| return reglist; |
| |
| bad_arg: |
| emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects {r0, r1, ...}", op)); |
| return 0; |
| } |
| |
| STATIC uint32_t get_arg_i(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, uint32_t fit_mask) { |
| mp_obj_t o; |
| if (!mp_parse_node_get_int_maybe(pn, &o)) { |
| emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects an integer", op)); |
| return 0; |
| } |
| uint32_t i = mp_obj_get_int_truncated(o); |
| if ((i & (~fit_mask)) != 0) { |
| 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)); |
| return 0; |
| } |
| return i; |
| } |
| |
| 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) { |
| if (!MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_atom_bracket)) { |
| goto bad_arg; |
| } |
| mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn; |
| if (!MP_PARSE_NODE_IS_STRUCT_KIND(pns->nodes[0], PN_testlist_comp)) { |
| goto bad_arg; |
| } |
| pns = (mp_parse_node_struct_t*)pns->nodes[0]; |
| if (MP_PARSE_NODE_STRUCT_NUM_NODES(pns) != 2) { |
| goto bad_arg; |
| } |
| |
| *pn_base = pns->nodes[0]; |
| *pn_offset = pns->nodes[1]; |
| return true; |
| |
| bad_arg: |
| 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)); |
| return false; |
| } |
| |
| STATIC int get_arg_label(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) { |
| if (!MP_PARSE_NODE_IS_ID(pn)) { |
| emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' expects a label", op)); |
| return 0; |
| } |
| qstr label_qstr = MP_PARSE_NODE_LEAF_ARG(pn); |
| for (uint i = 0; i < emit->max_num_labels; i++) { |
| if (emit->label_lookup[i] == label_qstr) { |
| return i; |
| } |
| } |
| // only need to have the labels on the last pass |
| if (emit->pass == MP_PASS_EMIT) { |
| emit_inline_thumb_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "label '%q' not defined", label_qstr)); |
| } |
| return 0; |
| } |
| |
| typedef struct _cc_name_t { byte cc; byte name[2]; } cc_name_t; |
| STATIC const cc_name_t cc_name_table[] = { |
| { ASM_THUMB_CC_EQ, "eq" }, |
| { ASM_THUMB_CC_NE, "ne" }, |
| { ASM_THUMB_CC_CS, "cs" }, |
| { ASM_THUMB_CC_CC, "cc" }, |
| { ASM_THUMB_CC_MI, "mi" }, |
| { ASM_THUMB_CC_PL, "pl" }, |
| { ASM_THUMB_CC_VS, "vs" }, |
| { ASM_THUMB_CC_VC, "vc" }, |
| { ASM_THUMB_CC_HI, "hi" }, |
| { ASM_THUMB_CC_LS, "ls" }, |
| { ASM_THUMB_CC_GE, "ge" }, |
| { ASM_THUMB_CC_LT, "lt" }, |
| { ASM_THUMB_CC_GT, "gt" }, |
| { ASM_THUMB_CC_LE, "le" }, |
| }; |
| |
| typedef struct _format_4_op_t { byte op; char name[3]; } format_4_op_t; |
| #define X(x) (((x) >> 4) & 0xff) // only need 1 byte to distinguish these ops |
| STATIC const format_4_op_t format_4_op_table[] = { |
| { X(ASM_THUMB_FORMAT_4_EOR), "eor" }, |
| { X(ASM_THUMB_FORMAT_4_LSL), "lsl" }, |
| { X(ASM_THUMB_FORMAT_4_LSR), "lsr" }, |
| { X(ASM_THUMB_FORMAT_4_ASR), "asr" }, |
| { X(ASM_THUMB_FORMAT_4_ADC), "adc" }, |
| { X(ASM_THUMB_FORMAT_4_SBC), "sbc" }, |
| { X(ASM_THUMB_FORMAT_4_ROR), "ror" }, |
| { X(ASM_THUMB_FORMAT_4_TST), "tst" }, |
| { X(ASM_THUMB_FORMAT_4_NEG), "neg" }, |
| { X(ASM_THUMB_FORMAT_4_CMP), "cmp" }, |
| { X(ASM_THUMB_FORMAT_4_CMN), "cmn" }, |
| { X(ASM_THUMB_FORMAT_4_ORR), "orr" }, |
| { X(ASM_THUMB_FORMAT_4_MUL), "mul" }, |
| { X(ASM_THUMB_FORMAT_4_BIC), "bic" }, |
| { X(ASM_THUMB_FORMAT_4_MVN), "mvn" }, |
| }; |
| #undef X |
| |
| // name is actually a qstr, which should fit in 16 bits |
| typedef struct _format_9_10_op_t { uint16_t op; uint16_t name; } format_9_10_op_t; |
| #define X(x) (x) |
| STATIC const format_9_10_op_t format_9_10_op_table[] = { |
| { X(ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER), MP_QSTR_ldr }, |
| { X(ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER), MP_QSTR_ldrb }, |
| { X(ASM_THUMB_FORMAT_10_LDRH), MP_QSTR_ldrh }, |
| { X(ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_WORD_TRANSFER), MP_QSTR_str }, |
| { X(ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER), MP_QSTR_strb }, |
| { X(ASM_THUMB_FORMAT_10_STRH), MP_QSTR_strh }, |
| }; |
| #undef X |
| |
| #if MICROPY_EMIT_INLINE_THUMB_FLOAT |
| // actual opcodes are: 0xee00 | op.hi_nibble, 0x0a00 | op.lo_nibble |
| typedef struct _format_vfp_op_t { byte op; char name[3]; } format_vfp_op_t; |
| STATIC const format_vfp_op_t format_vfp_op_table[] = { |
| { 0x30, "add" }, |
| { 0x34, "sub" }, |
| { 0x20, "mul" }, |
| { 0x80, "div" }, |
| }; |
| #endif |
| |
| // shorthand alias for whether we allow ARMv7-M instructions |
| #define ARMV7M MICROPY_EMIT_INLINE_THUMB_ARMV7M |
| |
| STATIC void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, mp_uint_t n_args, mp_parse_node_t *pn_args) { |
| // TODO perhaps make two tables: |
| // one_args = |
| // "b", LAB, asm_thumb_b_n, |
| // "bgt", LAB, asm_thumb_bgt_n, |
| // two_args = |
| // "movs", RLO, I8, asm_thumb_movs_reg_i8 |
| // "movw", REG, REG, asm_thumb_movw_reg_i16 |
| // three_args = |
| // "subs", RLO, RLO, I3, asm_thumb_subs_reg_reg_i3 |
| |
| size_t op_len; |
| const char *op_str = (const char*)qstr_data(op, &op_len); |
| |
| #if MICROPY_EMIT_INLINE_THUMB_FLOAT |
| if (op_str[0] == 'v') { |
| // floating point operations |
| if (n_args == 2) { |
| mp_uint_t op_code = 0x0ac0, op_code_hi; |
| if (op == MP_QSTR_vcmp) { |
| op_code_hi = 0xeeb4; |
| op_vfp_twoargs:; |
| mp_uint_t vd = get_arg_vfpreg(emit, op_str, pn_args[0]); |
| mp_uint_t vm = get_arg_vfpreg(emit, op_str, pn_args[1]); |
| asm_thumb_op32(emit->as, |
| op_code_hi | ((vd & 1) << 6), |
| op_code | ((vd & 0x1e) << 11) | ((vm & 1) << 5) | (vm & 0x1e) >> 1); |
| } else if (op == MP_QSTR_vsqrt) { |
| op_code_hi = 0xeeb1; |
| goto op_vfp_twoargs; |
| } else if (op == MP_QSTR_vneg) { |
| op_code_hi = 0xeeb1; |
| op_code = 0x0a40; |
| goto op_vfp_twoargs; |
| } else if (op == MP_QSTR_vcvt_f32_s32) { |
| op_code_hi = 0xeeb8; // int to float |
| goto op_vfp_twoargs; |
| } else if (op == MP_QSTR_vcvt_s32_f32) { |
| op_code_hi = 0xeebd; // float to int |
| goto op_vfp_twoargs; |
| } else if (op == MP_QSTR_vmrs) { |
| mp_uint_t reg_dest; |
| const char *reg_str0 = get_arg_str(pn_args[0]); |
| if (strcmp(reg_str0, "APSR_nzcv") == 0) { |
| reg_dest = 15; |
| } else { |
| reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15); |
| } |
| const char *reg_str1 = get_arg_str(pn_args[1]); |
| if (strcmp(reg_str1, "FPSCR") == 0) { |
| // FP status to ARM reg |
| asm_thumb_op32(emit->as, 0xeef1, 0x0a10 | (reg_dest << 12)); |
| } else { |
| goto unknown_op; |
| } |
| } else if (op == MP_QSTR_vmov) { |
| op_code_hi = 0xee00; |
| mp_uint_t r_arm, vm; |
| const char *reg_str = get_arg_str(pn_args[0]); |
| if (reg_str[0] == 'r') { |
| r_arm = get_arg_reg(emit, op_str, pn_args[0], 15); |
| vm = get_arg_vfpreg(emit, op_str, pn_args[1]); |
| op_code_hi |= 0x10; |
| } else { |
| vm = get_arg_vfpreg(emit, op_str, pn_args[0]); |
| r_arm = get_arg_reg(emit, op_str, pn_args[1], 15); |
| } |
| asm_thumb_op32(emit->as, |
| op_code_hi | ((vm & 0x1e) >> 1), |
| 0x0a10 | (r_arm << 12) | ((vm & 1) << 7)); |
| } else if (op == MP_QSTR_vldr) { |
| op_code_hi = 0xed90; |
| op_vldr_vstr:; |
| mp_uint_t vd = get_arg_vfpreg(emit, op_str, pn_args[0]); |
| 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 rlo_base = get_arg_reg(emit, op_str, pn_base, 7); |
| mp_uint_t i8; |
| i8 = get_arg_i(emit, op_str, pn_offset, 0x3fc) >> 2; |
| asm_thumb_op32(emit->as, |
| op_code_hi | rlo_base | ((vd & 1) << 6), |
| 0x0a00 | ((vd & 0x1e) << 11) | i8); |
| } |
| } else if (op == MP_QSTR_vstr) { |
| op_code_hi = 0xed80; |
| goto op_vldr_vstr; |
| } else { |
| goto unknown_op; |
| } |
| } else if (n_args == 3) { |
| // search table for arith ops |
| for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(format_vfp_op_table); i++) { |
| if (strncmp(op_str + 1, format_vfp_op_table[i].name, 3) == 0 && op_str[4] == '\0') { |
| mp_uint_t op_code_hi = 0xee00 | (format_vfp_op_table[i].op & 0xf0); |
| mp_uint_t op_code = 0x0a00 | ((format_vfp_op_table[i].op & 0x0f) << 4); |
| mp_uint_t vd = get_arg_vfpreg(emit, op_str, pn_args[0]); |
| mp_uint_t vn = get_arg_vfpreg(emit, op_str, pn_args[1]); |
| mp_uint_t vm = get_arg_vfpreg(emit, op_str, pn_args[2]); |
| asm_thumb_op32(emit->as, |
| op_code_hi | ((vd & 1) << 6) | (vn >> 1), |
| op_code | (vm >> 1) | ((vm & 1) << 5) | ((vd & 0x1e) << 11) | ((vn & 1) << 7)); |
| return; |
| } |
| } |
| goto unknown_op; |
| } else { |
| goto unknown_op; |
| } |
| } else |
| #endif |
| if (n_args == 0) { |
| if (op == MP_QSTR_nop) { |
| asm_thumb_op16(emit->as, ASM_THUMB_OP_NOP); |
| } else if (op == MP_QSTR_wfi) { |
| asm_thumb_op16(emit->as, ASM_THUMB_OP_WFI); |
| } else { |
| goto unknown_op; |
| } |
| |
| } else if (n_args == 1) { |
| if (op == MP_QSTR_b) { |
| int label_num = get_arg_label(emit, op_str, pn_args[0]); |
| if (!asm_thumb_b_n_label(emit->as, label_num)) { |
| goto branch_not_in_range; |
| } |
| } else if (op == MP_QSTR_bl) { |
| int label_num = get_arg_label(emit, op_str, pn_args[0]); |
| if (!asm_thumb_bl_label(emit->as, label_num)) { |
| goto branch_not_in_range; |
| } |
| } else if (op == MP_QSTR_bx) { |
| mp_uint_t r = get_arg_reg(emit, op_str, pn_args[0], 15); |
| asm_thumb_op16(emit->as, 0x4700 | (r << 3)); |
| } else if (op_str[0] == 'b' && (op_len == 3 |
| || (op_len == 5 && op_str[3] == '_' |
| && (op_str[4] == 'n' || (ARMV7M && op_str[4] == 'w'))))) { |
| mp_uint_t cc = -1; |
| for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(cc_name_table); i++) { |
| if (op_str[1] == cc_name_table[i].name[0] && op_str[2] == cc_name_table[i].name[1]) { |
| cc = cc_name_table[i].cc; |
| } |
| } |
| if (cc == (mp_uint_t)-1) { |
| goto unknown_op; |
| } |
| int label_num = get_arg_label(emit, op_str, pn_args[0]); |
| if (!asm_thumb_bcc_nw_label(emit->as, cc, label_num, op_len == 5 && op_str[4] == 'w')) { |
| goto branch_not_in_range; |
| } |
| } else if (ARMV7M && op_str[0] == 'i' && op_str[1] == 't') { |
| const char *arg_str = get_arg_str(pn_args[0]); |
| mp_uint_t cc = -1; |
| 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 == (mp_uint_t)-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 (op == MP_QSTR_cpsid) { |
| // TODO check pn_args[0] == i |
| asm_thumb_op16(emit->as, ASM_THUMB_OP_CPSID_I); |
| } else if (op == MP_QSTR_cpsie) { |
| // TODO check pn_args[0] == i |
| asm_thumb_op16(emit->as, ASM_THUMB_OP_CPSIE_I); |
| } else if (op == MP_QSTR_push) { |
| 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 { |
| if (!ARMV7M) { |
| goto unknown_op; |
| } |
| asm_thumb_op32(emit->as, 0xe92d, reglist); |
| } |
| } else if (op == MP_QSTR_pop) { |
| 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 { |
| if (!ARMV7M) { |
| goto unknown_op; |
| } |
| 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 (op == MP_QSTR_mov) { |
| 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 (ARMV7M && op == MP_QSTR_clz) { |
| 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 (ARMV7M && op == MP_QSTR_rbit) { |
| op_code_hi = 0xfa90; |
| op_code = 0xf0a0; |
| goto op_clz_rbit; |
| } else if (ARMV7M && op == MP_QSTR_mrs){ |
| mp_uint_t reg_dest = get_arg_reg(emit, op_str, pn_args[0], 12); |
| mp_uint_t reg_src = get_arg_special_reg(emit, op_str, pn_args[1]); |
| asm_thumb_op32(emit->as, 0xf3ef, 0x8000 | (reg_dest << 8) | reg_src); |
| } else { |
| if (op == MP_QSTR_and_) { |
| 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 (op == MP_QSTR_mov) { |
| 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 (op == MP_QSTR_cmp) { |
| op_code = ASM_THUMB_FORMAT_3_CMP; |
| goto op_format_3; |
| } else if (op == MP_QSTR_add) { |
| op_code = ASM_THUMB_FORMAT_3_ADD; |
| goto op_format_3; |
| } else if (op == MP_QSTR_sub) { |
| op_code = ASM_THUMB_FORMAT_3_SUB; |
| goto op_format_3; |
| } else if (ARMV7M && op == MP_QSTR_movw) { |
| 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 (ARMV7M && op == MP_QSTR_movt) { |
| op_code = ASM_THUMB_OP_MOVT; |
| goto op_movw_movt; |
| } else if (ARMV7M && op == MP_QSTR_movwt) { |
| // this is a convenience instruction |
| mp_uint_t reg_dest = get_arg_reg(emit, op_str, pn_args[0], 15); |
| uint32_t 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) & 0xffff); |
| } else if (ARMV7M && op == MP_QSTR_ldrex) { |
| 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 (op == format_9_10_op_table[i].name) { |
| 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 (op == MP_QSTR_lsl) { |
| op_code = ASM_THUMB_FORMAT_1_LSL; |
| mp_uint_t rlo_dest, rlo_src, i5; |
| op_format_1: |
| rlo_dest = get_arg_reg(emit, op_str, pn_args[0], 7); |
| rlo_src = get_arg_reg(emit, op_str, pn_args[1], 7); |
| i5 = get_arg_i(emit, op_str, pn_args[2], 0x1f); |
| asm_thumb_format_1(emit->as, op_code, rlo_dest, rlo_src, i5); |
| } else if (op == MP_QSTR_lsr) { |
| op_code = ASM_THUMB_FORMAT_1_LSR; |
| goto op_format_1; |
| } else if (op == MP_QSTR_asr) { |
| op_code = ASM_THUMB_FORMAT_1_ASR; |
| goto op_format_1; |
| } else if (op == MP_QSTR_add) { |
| 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 (ARMV7M && op == MP_QSTR_sdiv) { |
| 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 (ARMV7M && op == MP_QSTR_udiv) { |
| op_code = 0xfbb0; // udiv high part |
| goto op_sdiv_udiv; |
| } else if (op == MP_QSTR_sub) { |
| op_code = ASM_THUMB_FORMAT_2_SUB; |
| goto op_format_2; |
| } else if (ARMV7M && op == MP_QSTR_strex) { |
| 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 |