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py: Improvements to native emitter.

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Native emitter can now compile try/except blocks using nlr_push/nlr_pop.
It probably only works for 1 level of exception handling.  It doesn't
work on Thumb (only x64).

Native emitter can also handle some additional op codes.

With this patch, 198 tests now pass using "-X emit=native" option to
micropython.
This commit is contained in:
Damien George 2014-06-30 05:17:25 +01:00
parent 5813efd634
commit b601d9574a
6 changed files with 121 additions and 24 deletions
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4
py/compile.c
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@ -1894,7 +1894,7 @@ void compile_try_except(compiler_t *comp, mp_parse_node_t pn_body, int n_except,
EMIT_ARG(jump, success_label); // jump over exception handler
EMIT_ARG(label_assign, l1); // start of exception handler
EMIT_ARG(adjust_stack_size, 6); // stack adjust for the 3 exception items, +3 for possible UNWIND_JUMP state
EMIT(start_except_handler);
uint l2 = comp_next_label(comp);
@ -1966,7 +1966,7 @@ void compile_try_except(compiler_t *comp, mp_parse_node_t pn_body, int n_except,
compile_decrease_except_level(comp);
EMIT(end_finally);
EMIT_ARG(adjust_stack_size, -5); // stack adjust
EMIT(end_except_handler);
EMIT_ARG(label_assign, success_label);
compile_node(comp, pn_else); // else block, can be null

5
py/emit.h
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@ -134,6 +134,11 @@ typedef struct _emit_method_table_t {
void (*yield_value)(emit_t *emit);
void (*yield_from)(emit_t *emit);
// these methods are used to control entry to/exit from an exception handler
// they may or may not emit code
void (*start_except_handler)(emit_t *emit);
void (*end_except_handler)(emit_t *emit);
#if MICROPY_EMIT_CPYTHON
// these methods are only needed for emitcpy
void (*load_const_verbatim_str)(emit_t *emit, const char *str);

11
py/emitbc.c
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@ -849,6 +849,14 @@ STATIC void emit_bc_yield_from(emit_t *emit) {
emit_write_bytecode_byte(emit, MP_BC_YIELD_FROM);
}
STATIC void emit_bc_start_except_handler(emit_t *emit) {
emit_bc_adjust_stack_size(emit, 6); // stack adjust for the 3 exception items, +3 for possible UNWIND_JUMP state
}
STATIC void emit_bc_end_except_handler(emit_t *emit) {
emit_bc_adjust_stack_size(emit, -5); // stack adjust
}
const emit_method_table_t emit_bc_method_table = {
emit_bc_set_native_types,
emit_bc_start_pass,
@ -934,6 +942,9 @@ const emit_method_table_t emit_bc_method_table = {
emit_bc_raise_varargs,
emit_bc_yield_value,
emit_bc_yield_from,
emit_bc_start_except_handler,
emit_bc_end_except_handler,
};
#endif // !MICROPY_EMIT_CPYTHON

11
py/emitcpy.c
View File

@ -792,6 +792,14 @@ STATIC void emit_cpy_yield_from(emit_t *emit) {
}
}
STATIC void emit_cpy_start_except_handler(emit_t *emit) {
emit_cpy_adjust_stack_size(emit, 3); // stack adjust for the 3 exception items
}
STATIC void emit_cpy_end_except_handler(emit_t *emit) {
emit_cpy_adjust_stack_size(emit, -5); // stack adjust
}
STATIC void emit_cpy_load_const_verbatim_str(emit_t *emit, const char *str) {
emit_pre(emit, 1, 3);
if (emit->pass == MP_PASS_EMIT) {
@ -899,6 +907,9 @@ const emit_method_table_t emit_cpython_method_table = {
emit_cpy_yield_value,
emit_cpy_yield_from,
emit_cpy_start_except_handler,
emit_cpy_end_except_handler,
// emitcpy specific functions
emit_cpy_load_const_verbatim_str,
emit_cpy_load_closure,

110
py/emitnative.c
View File

@ -49,6 +49,7 @@
#include <assert.h>
#include "mpconfig.h"
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "lexer.h"
@ -723,7 +724,11 @@ STATIC void emit_native_load_const_str(emit_t *emit, qstr qstr, bool bytes) {
assert(0);
emit_post_push_imm(emit, VTYPE_PTR, (machine_uint_t)qstr_str(qstr));
} else {
emit_call_with_imm_arg(emit, MP_F_LOAD_CONST_STR, mp_load_const_str, qstr, REG_ARG_1);
if (bytes) {
emit_call_with_imm_arg(emit, 0, mp_load_const_bytes, qstr, REG_ARG_1); // TODO need to add function to runtime table
} else {
emit_call_with_imm_arg(emit, MP_F_LOAD_CONST_STR, mp_load_const_str, qstr, REG_ARG_1);
}
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}
}
@ -1057,17 +1062,33 @@ STATIC void emit_native_setup_with(emit_t *emit, uint label) {
// not supported, or could be with runtime call
assert(0);
}
STATIC void emit_native_with_cleanup(emit_t *emit) {
assert(0);
}
STATIC void emit_native_setup_except(emit_t *emit, uint label) {
assert(0);
emit_native_pre(emit);
// need to commit stack because we may jump elsewhere
need_stack_settled(emit);
emit_get_stack_pointer_to_reg_for_push(emit, REG_ARG_1, sizeof(nlr_buf_t) / sizeof(machine_uint_t)); // arg1 = pointer to nlr buf
emit_call(emit, 0, nlr_push); // TODO need to add function to runtime table
#if N_X64
asm_x64_test_r8_with_r8(emit->as, REG_RET, REG_RET);
asm_x64_jcc_label(emit->as, JCC_JNZ, label);
#elif N_THUMB
asm_thumb_cmp_rlo_i8(emit->as, REG_RET, 0);
asm_thumb_bcc_label(emit->as, THUMB_CC_NE, label);
#endif
emit_post(emit);
}
STATIC void emit_native_setup_finally(emit_t *emit, uint label) {
assert(0);
}
STATIC void emit_native_end_finally(emit_t *emit) {
assert(0);
//assert(0);
}
STATIC void emit_native_get_iter(emit_t *emit) {
@ -1107,19 +1128,31 @@ STATIC void emit_native_for_iter_end(emit_t *emit) {
STATIC void emit_native_pop_block(emit_t *emit) {
emit_native_pre(emit);
emit_call(emit, 0, nlr_pop); // TODO need to add function to runtime table
adjust_stack(emit, -(machine_int_t)(sizeof(nlr_buf_t) / sizeof(machine_uint_t)));
emit_post(emit);
}
STATIC void emit_native_pop_except(emit_t *emit) {
assert(0);
/*
emit_native_pre(emit);
emit_call(emit, 0, nlr_pop); // TODO need to add function to runtime table
adjust_stack(emit, -(machine_int_t)(sizeof(nlr_buf_t) / sizeof(machine_uint_t)));
emit_post(emit);
*/
}
STATIC void emit_native_unary_op(emit_t *emit, mp_unary_op_t op) {
vtype_kind_t vtype;
emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
assert(vtype == VTYPE_PYOBJ);
emit_call_with_imm_arg(emit, MP_F_UNARY_OP, mp_unary_op, op, REG_ARG_1);
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
if (op == MP_UNARY_OP_NOT) {
// we need to synthesise this operation
assert(0);
} else {
vtype_kind_t vtype;
emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
assert(vtype == VTYPE_PYOBJ);
emit_call_with_imm_arg(emit, MP_F_UNARY_OP, mp_unary_op, op, REG_ARG_1);
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}
}
STATIC void emit_native_binary_op(emit_t *emit, mp_binary_op_t op) {
@ -1233,17 +1266,26 @@ STATIC void emit_native_set_add(emit_t *emit, int set_index) {
STATIC void emit_native_build_slice(emit_t *emit, int n_args) {
DEBUG_printf("build_slice %d\n", n_args);
assert(n_args == 2);
vtype_kind_t vtype_start, vtype_stop;
emit_pre_pop_reg_reg(emit, &vtype_stop, REG_ARG_2, &vtype_start, REG_ARG_1); // arg1 = start, arg2 = stop
assert(vtype_start == VTYPE_PYOBJ);
assert(vtype_stop == VTYPE_PYOBJ);
emit_call_with_imm_arg(emit, MP_F_NEW_SLICE, mp_obj_new_slice, (machine_uint_t)MP_OBJ_NULL, REG_ARG_3); // arg3 = step
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
if (n_args == 2) {
vtype_kind_t vtype_start, vtype_stop;
emit_pre_pop_reg_reg(emit, &vtype_stop, REG_ARG_2, &vtype_start, REG_ARG_1); // arg1 = start, arg2 = stop
assert(vtype_start == VTYPE_PYOBJ);
assert(vtype_stop == VTYPE_PYOBJ);
emit_call_with_imm_arg(emit, MP_F_NEW_SLICE, mp_obj_new_slice, (machine_uint_t)mp_const_none, REG_ARG_3); // arg3 = step
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
} else {
assert(n_args == 3);
vtype_kind_t vtype_start, vtype_stop, vtype_step;
emit_pre_pop_reg_reg_reg(emit, &vtype_step, REG_ARG_3, &vtype_stop, REG_ARG_2, &vtype_start, REG_ARG_1); // arg1 = start, arg2 = stop, arg3 = step
assert(vtype_start == VTYPE_PYOBJ);
assert(vtype_stop == VTYPE_PYOBJ);
assert(vtype_step == VTYPE_PYOBJ);
emit_call(emit, MP_F_NEW_SLICE, mp_obj_new_slice);
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}
}
STATIC void emit_native_unpack_sequence(emit_t *emit, int n_args) {
// TODO this is untested
DEBUG_printf("unpack_sequence %d\n", n_args);
vtype_kind_t vtype_base;
emit_pre_pop_reg(emit, &vtype_base, REG_ARG_1); // arg1 = seq
@ -1253,13 +1295,12 @@ STATIC void emit_native_unpack_sequence(emit_t *emit, int n_args) {
}
STATIC void emit_native_unpack_ex(emit_t *emit, int n_left, int n_right) {
// TODO this is untested
DEBUG_printf("unpack_ex %d %d\n", n_left, n_right);
vtype_kind_t vtype_base;
emit_pre_pop_reg(emit, &vtype_base, REG_ARG_1); // arg1 = seq
assert(vtype_base == VTYPE_PYOBJ);
emit_get_stack_pointer_to_reg_for_push(emit, REG_ARG_3, n_left + n_right); // arg3 = dest ptr
emit_call_with_imm_arg(emit, MP_F_UNPACK_EX, mp_unpack_ex, n_left + n_right, REG_ARG_2); // arg2 = n_left + n_right
emit_get_stack_pointer_to_reg_for_push(emit, REG_ARG_3, n_left + n_right + 1); // arg3 = dest ptr
emit_call_with_imm_arg(emit, MP_F_UNPACK_EX, mp_unpack_ex, n_left | (n_right << 8), REG_ARG_2); // arg2 = n_left + n_right
}
STATIC void emit_native_make_function(emit_t *emit, scope_t *scope, uint n_pos_defaults, uint n_kw_defaults) {
@ -1368,9 +1409,16 @@ STATIC void emit_native_return_value(emit_t *emit) {
}
STATIC void emit_native_raise_varargs(emit_t *emit, int n_args) {
// call runtime
assert(0);
assert(n_args == 1);
vtype_kind_t vtype_err;
emit_pre_pop_reg(emit, &vtype_err, REG_ARG_1); // arg1 = object to raise
assert(vtype_err == VTYPE_PYOBJ);
emit_call(emit, 0, mp_make_raise_obj); // TODO need to add function to runtime table
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
emit_pre_pop_reg(emit, &vtype_err, REG_ARG_1);
emit_call(emit, 0, nlr_jump); // TODO need to add function to runtime table
}
STATIC void emit_native_yield_value(emit_t *emit) {
// not supported (for now)
assert(0);
@ -1380,6 +1428,21 @@ STATIC void emit_native_yield_from(emit_t *emit) {
assert(0);
}
STATIC void emit_native_start_except_handler(emit_t *emit) {
// This instruction follows an nlr_pop, so the stack counter is back to zero, when really
// it should be up by a whole nlr_buf_t. We then want to pop the nlr_buf_t here, but save
// the first 2 elements, so we can get the thrown value.
adjust_stack(emit, 2);
vtype_kind_t vtype_nlr;
emit_pre_pop_reg(emit, &vtype_nlr, REG_ARG_1); // get the thrown value
emit_pre_pop_discard(emit, &vtype_nlr); // discard the linked-list pointer in the nlr_buf
emit_post_push_reg_reg_reg(emit, VTYPE_PYOBJ, REG_ARG_1, VTYPE_PYOBJ, REG_ARG_1, VTYPE_PYOBJ, REG_ARG_1); // push the 3 exception items
}
STATIC void emit_native_end_except_handler(emit_t *emit) {
adjust_stack(emit, -3); // stack adjust (not sure why it's this much...)
}
const emit_method_table_t EXPORT_FUN(method_table) = {
emit_native_set_viper_types,
emit_native_start_pass,
@ -1465,6 +1528,9 @@ const emit_method_table_t EXPORT_FUN(method_table) = {
emit_native_raise_varargs,
emit_native_yield_value,
emit_native_yield_from,
emit_native_start_except_handler,
emit_native_end_except_handler,
};
#endif // (MICROPY_EMIT_X64 && N_X64) || (MICROPY_EMIT_THUMB && N_THUMB)

4
py/emitpass1.c
View File

@ -214,6 +214,10 @@ const emit_method_table_t emit_pass1_method_table = {
(void*)emit_pass1_dummy,
(void*)emit_pass1_dummy,
(void*)emit_pass1_dummy,
(void*)emit_pass1_dummy,
(void*)emit_pass1_dummy,
#if MICROPY_EMIT_CPYTHON
(void*)emit_pass1_dummy,
(void*)emit_pass1_dummy,