diff options
Diffstat (limited to 'py')
| -rw-r--r-- | py/asmxtensa.c | 4 | ||||
| -rw-r--r-- | py/compile.c | 3 | ||||
| -rw-r--r-- | py/emit.h | 4 | ||||
| -rw-r--r-- | py/emitinlinextensa.c | 364 | ||||
| -rw-r--r-- | py/mpconfig.h | 7 | ||||
| -rw-r--r-- | py/py.mk | 1 |
6 files changed, 380 insertions, 3 deletions
diff --git a/py/asmxtensa.c b/py/asmxtensa.c index 63aad02c06..00df432ce7 100644 --- a/py/asmxtensa.c +++ b/py/asmxtensa.c @@ -30,7 +30,7 @@ #include "py/mpconfig.h" // wrapper around everything in this file -#if MICROPY_EMIT_XTENSA +#if MICROPY_EMIT_XTENSA || MICROPY_EMIT_INLINE_XTENSA #include "py/asmxtensa.h" @@ -167,4 +167,4 @@ void asm_xtensa_mov_reg_local_addr(asm_xtensa_t *as, uint reg_dest, int local_nu asm_xtensa_op_addi(as, reg_dest, reg_dest, (4 + local_num) * WORD_SIZE); } -#endif // MICROPY_EMIT_XTENSA +#endif // MICROPY_EMIT_XTENSA || MICROPY_EMIT_INLINE_XTENSA diff --git a/py/compile.c b/py/compile.c index b85e659e7a..6c9b6abfe6 100644 --- a/py/compile.c +++ b/py/compile.c @@ -91,6 +91,9 @@ typedef enum { #if MICROPY_EMIT_INLINE_THUMB #define ASM_DECORATOR_QSTR MP_QSTR_asm_thumb #define ASM_EMITTER(f) emit_inline_thumb_##f +#elif MICROPY_EMIT_INLINE_XTENSA +#define ASM_DECORATOR_QSTR MP_QSTR_asm_xtensa +#define ASM_EMITTER(f) emit_inline_xtensa_##f #else #error "unknown asm emitter" #endif @@ -272,9 +272,13 @@ typedef struct _emit_inline_asm_method_table_t { } emit_inline_asm_method_table_t; extern const emit_inline_asm_method_table_t emit_inline_thumb_method_table; +extern const emit_inline_asm_method_table_t emit_inline_xtensa_method_table; emit_inline_asm_t *emit_inline_thumb_new(mp_uint_t max_num_labels); +emit_inline_asm_t *emit_inline_xtensa_new(mp_uint_t max_num_labels); + void emit_inline_thumb_free(emit_inline_asm_t *emit); +void emit_inline_xtensa_free(emit_inline_asm_t *emit); #if MICROPY_WARNINGS void mp_emitter_warning(pass_kind_t pass, const char *msg); diff --git a/py/emitinlinextensa.c b/py/emitinlinextensa.c new file mode 100644 index 0000000000..bd1a7a3ec8 --- /dev/null +++ b/py/emitinlinextensa.c @@ -0,0 +1,364 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2013-2016 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/asmxtensa.h" + +#if MICROPY_EMIT_INLINE_XTENSA + +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_xtensa_t *as; +}; + +STATIC void emit_inline_xtensa_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_xtensa_error_exc(emit_inline_asm_t *emit, mp_obj_t exc) { + *emit->error_slot = exc; +} + +emit_inline_asm_t *emit_inline_xtensa_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 = m_new0(asm_xtensa_t, 1); + mp_asm_base_init(&emit->as->base, max_num_labels); + return emit; +} + +void emit_inline_xtensa_free(emit_inline_asm_t *emit) { + m_del(qstr, emit->label_lookup, emit->max_num_labels); + mp_asm_base_deinit(&emit->as->base, false); + m_del_obj(asm_xtensa_t, emit->as); + m_del_obj(emit_inline_asm_t, emit); +} + +STATIC void emit_inline_xtensa_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)); + } + mp_asm_base_start_pass(&emit->as->base, pass == MP_PASS_EMIT ? MP_ASM_PASS_EMIT : MP_ASM_PASS_COMPUTE); + asm_xtensa_entry(emit->as, 0); +} + +STATIC void emit_inline_xtensa_end_pass(emit_inline_asm_t *emit, mp_uint_t type_sig) { + asm_xtensa_exit(emit->as); + asm_xtensa_end_pass(emit->as); + + if (emit->pass == MP_PASS_EMIT) { + void *f = mp_asm_base_get_code(&emit->as->base); + mp_emit_glue_assign_native(emit->scope->raw_code, MP_CODE_NATIVE_ASM, f, + mp_asm_base_get_code_size(&emit->as->base), NULL, emit->scope->num_pos_args, 0, type_sig); + } +} + +STATIC mp_uint_t emit_inline_xtensa_count_params(emit_inline_asm_t *emit, mp_uint_t n_params, mp_parse_node_t *pn_params) { + if (n_params > 4) { + emit_inline_xtensa_error_msg(emit, "can only have up to 4 parameters to Xtensa assembly"); + return 0; + } + for (mp_uint_t i = 0; i < n_params; i++) { + if (!MP_PARSE_NODE_IS_ID(pn_params[i])) { + emit_inline_xtensa_error_msg(emit, "parameters must be registers in sequence a2 to a5"); + return 0; + } + const char *p = qstr_str(MP_PARSE_NODE_LEAF_ARG(pn_params[i])); + if (!(strlen(p) == 2 && p[0] == 'a' && p[1] == '2' + i)) { + emit_inline_xtensa_error_msg(emit, "parameters must be registers in sequence a2 to a5"); + return 0; + } + } + return n_params; +} + +STATIC bool emit_inline_xtensa_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; + mp_asm_base_label_assign(&emit->as->base, label_num); + return true; +} + +STATIC void emit_inline_xtensa_align(emit_inline_asm_t *emit, mp_uint_t align) { + mp_asm_base_align(&emit->as->base, align); +} + +STATIC void emit_inline_xtensa_data(emit_inline_asm_t *emit, mp_uint_t bytesize, mp_uint_t val) { + mp_asm_base_data(&emit->as->base, bytesize, val); +} + +typedef struct _reg_name_t { byte reg; byte name[3]; } reg_name_t; +STATIC const reg_name_t reg_name_table[] = { + {0, "a0\0"}, + {1, "a1\0"}, + {2, "a2\0"}, + {3, "a3\0"}, + {4, "a4\0"}, + {5, "a5\0"}, + {6, "a6\0"}, + {7, "a7\0"}, + {8, "a8\0"}, + {9, "a9\0"}, + {10, "a10"}, + {11, "a11"}, + {12, "a12"}, + {13, "a13"}, + {14, "a14"}, + {15, "a15"}, +}; + +// 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) { + 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')) { + return r->reg; + } + } + emit_inline_xtensa_error_exc(emit, + mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, + "'%s' expects a register", op)); + return 0; +} + +STATIC uint32_t get_arg_i(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn, int min, int max) { + mp_obj_t o; + if (!mp_parse_node_get_int_maybe(pn, &o)) { + emit_inline_xtensa_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 (min != max && ((int)i < min || (int)i > max)) { + emit_inline_xtensa_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "'%s' integer %d is not within range %d..%d", op, i, min, max)); + return 0; + } + return i; +} + +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_xtensa_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_xtensa_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "label '%q' not defined", label_qstr)); + } + return 0; +} + +#define RRR (0) +#define RRI8 (1) +#define RRI8_B (2) + +typedef struct _opcode_table_3arg_t { + uint16_t name; // actually a qstr, which should fit in 16 bits + uint8_t type; + uint8_t a0 : 4; + uint8_t a1 : 4; +} opcode_table_3arg_t; + +STATIC const opcode_table_3arg_t opcode_table_3arg[] = { + // arithmetic opcodes: reg, reg, reg + {MP_QSTR_and_, RRR, 0, 1}, + {MP_QSTR_or_, RRR, 0, 2}, + {MP_QSTR_xor, RRR, 0, 3}, + {MP_QSTR_add, RRR, 0, 8}, + {MP_QSTR_sub, RRR, 0, 12}, + {MP_QSTR_mull, RRR, 2, 8}, + + // load/store/addi opcodes: reg, reg, imm + // upper nibble of type encodes the range of the immediate arg + {MP_QSTR_l8ui, RRI8 | 0x10, 2, 0}, + {MP_QSTR_l16ui, RRI8 | 0x30, 2, 1}, + {MP_QSTR_l32i, RRI8 | 0x50, 2, 2}, + {MP_QSTR_s8i, RRI8 | 0x10, 2, 4}, + {MP_QSTR_s16i, RRI8 | 0x30, 2, 5}, + {MP_QSTR_s32i, RRI8 | 0x50, 2, 6}, + {MP_QSTR_l16si, RRI8 | 0x30, 2, 9}, + {MP_QSTR_addi, RRI8 | 0x00, 2, 12}, + + // branch opcodes: reg, reg, label + {MP_QSTR_ball, RRI8_B, ASM_XTENSA_CC_ALL, 0}, + {MP_QSTR_bany, RRI8_B, ASM_XTENSA_CC_ANY, 0}, + {MP_QSTR_bbc, RRI8_B, ASM_XTENSA_CC_BC, 0}, + {MP_QSTR_bbs, RRI8_B, ASM_XTENSA_CC_BS, 0}, + {MP_QSTR_beq, RRI8_B, ASM_XTENSA_CC_EQ, 0}, + {MP_QSTR_bge, RRI8_B, ASM_XTENSA_CC_GE, 0}, + {MP_QSTR_bgeu, RRI8_B, ASM_XTENSA_CC_GEU, 0}, + {MP_QSTR_blt, RRI8_B, ASM_XTENSA_CC_LT, 0}, + {MP_QSTR_bnall, RRI8_B, ASM_XTENSA_CC_NALL, 0}, + {MP_QSTR_bne, RRI8_B, ASM_XTENSA_CC_NE, 0}, + {MP_QSTR_bnone, RRI8_B, ASM_XTENSA_CC_NONE, 0}, +}; + +STATIC void emit_inline_xtensa_op(emit_inline_asm_t *emit, qstr op, mp_uint_t n_args, mp_parse_node_t *pn_args) { + size_t op_len; + const char *op_str = (const char*)qstr_data(op, &op_len); + + if (n_args == 0) { + if (op == MP_QSTR_ret_n) { + asm_xtensa_op_ret_n(emit->as); + } else { + goto unknown_op; + } + + } else if (n_args == 1) { + if (op == MP_QSTR_callx0) { + uint r0 = get_arg_reg(emit, op_str, pn_args[0]); + asm_xtensa_op_callx0(emit->as, r0); + } else if (op == MP_QSTR_j) { + int label = get_arg_label(emit, op_str, pn_args[0]); + asm_xtensa_j_label(emit->as, label); + } else if (op == MP_QSTR_jx) { + uint r0 = get_arg_reg(emit, op_str, pn_args[0]); + asm_xtensa_op_jx(emit->as, r0); + } else { + goto unknown_op; + } + + } else if (n_args == 2) { + uint r0 = get_arg_reg(emit, op_str, pn_args[0]); + if (op == MP_QSTR_beqz) { + int label = get_arg_label(emit, op_str, pn_args[1]); + asm_xtensa_bccz_reg_label(emit->as, ASM_XTENSA_CCZ_EQ, r0, label); + } else if (op == MP_QSTR_bnez) { + int label = get_arg_label(emit, op_str, pn_args[1]); + asm_xtensa_bccz_reg_label(emit->as, ASM_XTENSA_CCZ_NE, r0, label); + } else if (op == MP_QSTR_mov || op == MP_QSTR_mov_n) { + // we emit mov.n for both "mov" and "mov_n" opcodes + uint r1 = get_arg_reg(emit, op_str, pn_args[1]); + asm_xtensa_op_mov_n(emit->as, r0, r1); + } else if (op == MP_QSTR_movi) { + // for convenience we emit l32r if the integer doesn't fit in movi + uint32_t imm = get_arg_i(emit, op_str, pn_args[1], 0, 0); + asm_xtensa_mov_reg_i32(emit->as, r0, imm); + } else { + goto unknown_op; + } + + } else if (n_args == 3) { + // search table for 3 arg instructions + for (uint i = 0; i < MP_ARRAY_SIZE(opcode_table_3arg); i++) { + const opcode_table_3arg_t *o = &opcode_table_3arg[i]; + if (op == o->name) { + uint r0 = get_arg_reg(emit, op_str, pn_args[0]); + uint r1 = get_arg_reg(emit, op_str, pn_args[1]); + if (o->type == RRR) { + uint r2 = get_arg_reg(emit, op_str, pn_args[2]); + asm_xtensa_op24(emit->as, ASM_XTENSA_ENCODE_RRR(0, o->a0, o->a1, r0, r1, r2)); + } else if (o->type == RRI8_B) { + int label = get_arg_label(emit, op_str, pn_args[2]); + asm_xtensa_bcc_reg_reg_label(emit->as, o->a0, r0, r1, label); + } else { + int shift, min, max; + if ((o->type & 0xf0) == 0) { + shift = 0; + min = -128; + max = 127; + } else { + shift = (o->type & 0xf0) >> 5; + min = 0; + max = 0xff << shift; + } + uint32_t imm = get_arg_i(emit, op_str, pn_args[2], min, max); + asm_xtensa_op24(emit->as, ASM_XTENSA_ENCODE_RRI8(o->a0, o->a1, r1, r0, (imm >> shift) & 0xff)); + } + return; + } + } + goto unknown_op; + + } else { + goto unknown_op; + } + + return; + +unknown_op: + emit_inline_xtensa_error_exc(emit, mp_obj_new_exception_msg_varg(&mp_type_SyntaxError, "unsupported Xtensa instruction '%s' with %d arguments", op_str, n_args)); + return; + + /* +branch_not_in_range: + emit_inline_xtensa_error_msg(emit, "branch not in range"); + return; + */ +} + +const emit_inline_asm_method_table_t emit_inline_xtensa_method_table = { + emit_inline_xtensa_start_pass, + emit_inline_xtensa_end_pass, + emit_inline_xtensa_count_params, + emit_inline_xtensa_label, + emit_inline_xtensa_align, + emit_inline_xtensa_data, + emit_inline_xtensa_op, +}; + +#endif // MICROPY_EMIT_INLINE_XTENSA diff --git a/py/mpconfig.h b/py/mpconfig.h index 5234cc7f9c..3612e6bcb3 100644 --- a/py/mpconfig.h +++ b/py/mpconfig.h @@ -293,11 +293,16 @@ #define MICROPY_EMIT_XTENSA (0) #endif +// Whether to enable the Xtensa inline assembler +#ifndef MICROPY_EMIT_INLINE_XTENSA +#define MICROPY_EMIT_INLINE_XTENSA (0) +#endif + // Convenience definition for whether any native emitter is enabled #define MICROPY_EMIT_NATIVE (MICROPY_EMIT_X64 || MICROPY_EMIT_X86 || MICROPY_EMIT_THUMB || MICROPY_EMIT_ARM || MICROPY_EMIT_XTENSA) // Convenience definition for whether any inline assembler emitter is enabled -#define MICROPY_EMIT_INLINE_ASM (MICROPY_EMIT_INLINE_THUMB) +#define MICROPY_EMIT_INLINE_ASM (MICROPY_EMIT_INLINE_THUMB || MICROPY_EMIT_INLINE_XTENSA) /*****************************************************************************/ /* Compiler configuration */ @@ -132,6 +132,7 @@ PY_O_BASENAME = \ emitnarm.o \ asmxtensa.o \ emitnxtensa.o \ + emitinlinextensa.o \ formatfloat.o \ parsenumbase.o \ parsenum.o \ |