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Add support for inline thumb assembly.

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This commit is contained in:
Damien 2013-10-05 23:17:28 +01:00
parent 5bfb759980
commit 826005c60b
12 changed files with 489 additions and 113 deletions
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1
py/Makefile
View File

@ -19,6 +19,7 @@ SRC = \
emitx64.c \
emitthumb.c \
asmthumb.c \
emitinlinethumb.c \
runtime.c \
vm.c \
main.c \

119
py/asmthumb.c
View File

@ -20,7 +20,6 @@ struct _asm_thumb_t {
byte *code_base;
byte dummy_data[8];
int next_label;
int max_num_labels;
int *label_offsets;
int num_locals;
@ -65,7 +64,6 @@ void asm_thumb_free(asm_thumb_t *as, bool free_code) {
void asm_thumb_start_pass(asm_thumb_t *as, int pass) {
as->pass = pass;
as->code_offset = 0;
as->next_label = 1;
if (pass == ASM_THUMB_PASS_2) {
memset(as->label_offsets, -1, as->max_num_labels * sizeof(int));
}
@ -212,10 +210,6 @@ void asm_thumb_exit(asm_thumb_t *as) {
asm_thumb_write_op16(as, OP_POP_RLIST_PC(as->push_reglist));
}
int asm_thumb_label_new(asm_thumb_t *as) {
return as->next_label++;
}
void asm_thumb_label_assign(asm_thumb_t *as, int label) {
assert(label < as->max_num_labels);
if (as->pass == ASM_THUMB_PASS_2) {
@ -234,43 +228,33 @@ static int get_label_dest(asm_thumb_t *as, int label) {
return as->label_offsets[label];
}
// the i8 value will be zero extended into the r32 register!
void asm_thumb_mov_reg_i8(asm_thumb_t *as, uint rlo_dest, int i8) {
#define OP_MOVS_RLO_I8(rlo_dest, i8_src) (0x2000 | ((rlo_dest) << 8) | (i8_src))
// the i8_src value will be zero extended into the r32 register!
void asm_thumb_movs_rlo_i8(asm_thumb_t *as, uint rlo_dest, int i8_src) {
assert(rlo_dest < REG_R8);
// movs rlo_dest, #i8
asm_thumb_write_op16(as, 0x2000 | (rlo_dest << 8) | i8);
// movs rlo_dest, #i8_src
asm_thumb_write_op16(as, OP_MOVS_RLO_I8(rlo_dest, i8_src));
}
// if loading lo half, the i16 value will be zero extended into the r32 register!
void asm_thumb_mov_i16_to_reg(asm_thumb_t *as, int i16, uint reg_dest, bool load_hi_half) {
#define OP_MOVW (0xf240)
#define OP_MOVT (0xf2c0)
// if loading lo half with movw, the i16 value will be zero extended into the r32 register!
static void asm_thumb_mov_reg_i16(asm_thumb_t *as, uint mov_op, uint reg_dest, int i16_src) {
assert(reg_dest < REG_R15);
uint op;
if (load_hi_half) {
// movt reg_dest, #i16
op = 0xf2c0;
} else {
// movw reg_dest, #i16
op = 0xf240;
}
asm_thumb_write_op32(as, op | ((i16 >> 1) & 0x0400) | ((i16 >> 12) & 0xf), ((i16 << 4) & 0x7000) | (reg_dest << 8) | (i16 & 0xff));
// mov[wt] reg_dest, #i16_src
asm_thumb_write_op32(as, mov_op | ((i16_src >> 1) & 0x0400) | ((i16_src >> 12) & 0xf), ((i16_src << 4) & 0x7000) | (reg_dest << 8) | (i16_src & 0xff));
}
void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_uint_t i32) {
// movw, movt does it in 8 bytes
// ldr [pc, #], dw does it in 6 bytes, but we might not reach to end of code for dw
asm_thumb_mov_i16_to_reg(as, i32, reg_dest, false);
asm_thumb_mov_i16_to_reg(as, i32 >> 16, reg_dest, true);
// the i16_src value will be zero extended into the r32 register!
void asm_thumb_movw_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src) {
asm_thumb_mov_reg_i16(as, OP_MOVW, reg_dest, i16_src);
}
void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32) {
if (reg_dest < 8 && UNSIGNED_FIT8(i32)) {
asm_thumb_mov_reg_i8(as, reg_dest, i32);
} else if (UNSIGNED_FIT16(i32)) {
asm_thumb_mov_i16_to_reg(as, i32, reg_dest, false);
} else {
asm_thumb_mov_reg_i32(as, reg_dest, i32);
}
// the i16_src value will be zero extended into the r32 register!
void asm_thumb_movt_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src) {
asm_thumb_mov_reg_i16(as, OP_MOVT, reg_dest, i16_src);
}
void asm_thumb_mov_reg_reg(asm_thumb_t *as, uint reg_dest, uint reg_src) {
@ -285,9 +269,69 @@ void asm_thumb_mov_reg_reg(asm_thumb_t *as, uint reg_dest, uint reg_src) {
} else {
op_lo |= 0x80 | (reg_dest - 8);
}
// mov reg_dest, reg_src
asm_thumb_write_op16(as, 0x4600 | op_lo);
}
#define OP_SUBS_RLO_RLO_I3(rlo_dest, rlo_src, i3_src) (0x1e00 | ((i3_src) << 6) | ((rlo_src) << 3) | (rlo_dest))
void asm_thumb_subs_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src, int i3_src) {
assert(rlo_dest < REG_R8);
assert(rlo_src < REG_R8);
asm_thumb_write_op16(as, OP_SUBS_RLO_RLO_I3(rlo_dest, rlo_src, i3_src));
}
#define OP_CMP_RLO_I8(rlo, i8) (0x2800 | ((rlo) << 8) | (i8))
void asm_thumb_cmp_rlo_i8(asm_thumb_t *as, uint rlo, int i8) {
assert(rlo < REG_R8);
asm_thumb_write_op16(as, OP_CMP_RLO_I8(rlo, i8));
}
#define OP_BEQ_N(byte_offset) (0xd000 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BNE_N(byte_offset) (0xd100 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BCS_N(byte_offset) (0xd200 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BCC_N(byte_offset) (0xd300 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BMI_N(byte_offset) (0xd400 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BPL_N(byte_offset) (0xd500 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BVS_N(byte_offset) (0xd600 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BVC_N(byte_offset) (0xd700 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BHI_N(byte_offset) (0xd800 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BLS_N(byte_offset) (0xd900 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BGE_N(byte_offset) (0xda00 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BLT_N(byte_offset) (0xdb00 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BGT_N(byte_offset) (0xdc00 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BLE_N(byte_offset) (0xdd00 | (((byte_offset) >> 1) & 0x00ff))
void asm_thumb_bgt_n(asm_thumb_t *as, int label) {
int dest = get_label_dest(as, label);
int rel = dest - as->code_offset;
rel -= 4; // account for instruction prefetch, PC is 4 bytes ahead of this instruction
if (SIGNED_FIT9(rel)) {
asm_thumb_write_op16(as, OP_BGT_N(rel));
} else {
printf("asm_thumb_bgt: branch does not fit in 9 bits\n");
}
}
void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_uint_t i32) {
// movw, movt does it in 8 bytes
// ldr [pc, #], dw does it in 6 bytes, but we might not reach to end of code for dw
asm_thumb_mov_reg_i16(as, OP_MOVW, reg_dest, i32);
asm_thumb_mov_reg_i16(as, OP_MOVT, reg_dest, i32 >> 16);
}
void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32) {
if (reg_dest < 8 && UNSIGNED_FIT8(i32)) {
asm_thumb_movs_rlo_i8(as, reg_dest, i32);
} else if (UNSIGNED_FIT16(i32)) {
asm_thumb_mov_reg_i16(as, OP_MOVW, reg_dest, i32);
} else {
asm_thumb_mov_reg_i32(as, reg_dest, i32);
}
}
#define OP_STR_TO_SP_OFFSET(rlo_dest, word_offset) (0x9000 | ((rlo_dest) << 8) | ((word_offset) & 0x00ff))
#define OP_LDR_FROM_SP_OFFSET(rlo_dest, word_offset) (0x9800 | ((rlo_dest) << 8) | ((word_offset) & 0x00ff))
@ -351,7 +395,6 @@ void asm_thumb_b_label(asm_thumb_t *as, int label) {
}
}
#define OP_CMP_REG_IMM(rlo, i8) (0x2800 | ((rlo) << 8) | (i8))
// all these bit arithmetics need coverage testing!
#define OP_BEQ(byte_offset) (0xd000 | (((byte_offset) >> 1) & 0x00ff))
#define OP_BEQW_HI(byte_offset) (0xf000 | (((byte_offset) >> 10) & 0x0400) | (((byte_offset) >> 14) & 0x003f))
@ -361,7 +404,7 @@ void asm_thumb_cmp_reg_bz_label(asm_thumb_t *as, uint rlo, int label) {
assert(rlo < REG_R8);
// compare reg with 0
asm_thumb_write_op16(as, OP_CMP_REG_IMM(rlo, 0));
asm_thumb_write_op16(as, OP_CMP_RLO_I8(rlo, 0));
// branch if equal
int dest = get_label_dest(as, label);
@ -369,7 +412,7 @@ void asm_thumb_cmp_reg_bz_label(asm_thumb_t *as, uint rlo, int label) {
rel -= 4; // account for instruction prefetch, PC is 4 bytes ahead of this instruction
if (dest >= 0 && rel <= -4) {
// is a backwards jump, so we know the size of the jump on the first pass
// calculate rel assuming 12 bit relative jump
// calculate rel assuming 9 bit relative jump
if (SIGNED_FIT9(rel)) {
asm_thumb_write_op16(as, OP_BEQ(rel));
} else {

33
py/asmthumb.h
View File

@ -38,23 +38,30 @@ void *asm_thumb_get_code(asm_thumb_t *as);
void asm_thumb_entry(asm_thumb_t *as, int num_locals);
void asm_thumb_exit(asm_thumb_t *as);
int asm_thumb_label_new(asm_thumb_t *as);
void asm_thumb_label_assign(asm_thumb_t *as, int label);
// argument order follows ARM, in general dest is first
// note there is a difference between movw and mov.w, and many others!
void asm_thumb_mov_reg_i8(asm_thumb_t *as, uint rlo_dest, int i8_src);
void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_uint_t i32_src);
void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32_src);
void asm_thumb_movs_rlo_i8(asm_thumb_t *as, uint rlo_dest, int i8_src);
void asm_thumb_movw_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src);
void asm_thumb_movt_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src);
void asm_thumb_mov_reg_reg(asm_thumb_t *as, uint reg_dest, uint reg_src);
void asm_thumb_mov_local_reg(asm_thumb_t *as, int local_num_dest, uint rlo_src);
void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num);
void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint reg_dest, int local_num);
void asm_thumb_subs_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src, int i3_src);
void asm_thumb_cmp_rlo_i8(asm_thumb_t *as, uint rlo, int i8);
void asm_thumb_bgt_n(asm_thumb_t *as, int label);
void asm_thumb_add_reg_reg_reg(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b);
void asm_thumb_cmp_reg_reg(asm_thumb_t *as, uint rlo_a, uint rlo_b);
void asm_thumb_ite_ge(asm_thumb_t *as);
void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_uint_t i32_src); // convenience
void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32_src); // convenience
void asm_thumb_mov_local_reg(asm_thumb_t *as, int local_num_dest, uint rlo_src); // convenience
void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience
void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint reg_dest, int local_num); // convenience
void asm_thumb_add_reg_reg_reg(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b); // convenience ?
void asm_thumb_cmp_reg_reg(asm_thumb_t *as, uint rlo_a, uint rlo_b); // convenience ?
void asm_thumb_ite_ge(asm_thumb_t *as); // convenience ?
void asm_thumb_b_label(asm_thumb_t *as, int label); // convenience ?
void asm_thumb_cmp_reg_bz_label(asm_thumb_t *as, uint rlo, int label); // convenience ?
void asm_thumb_bl_ind(asm_thumb_t *as, void *fun_ptr, uint fun_id, uint reg_temp); // convenience ?
void asm_thumb_b_label(asm_thumb_t *as, int label);
void asm_thumb_cmp_reg_bz_label(asm_thumb_t *as, uint rlo, int label);
void asm_thumb_bl_ind(asm_thumb_t *as, void *fun_ptr, uint fun_id, uint reg_temp);

159
py/compile.c
View File

@ -26,6 +26,7 @@ typedef enum {
} pn_kind_t;
#define EMIT(fun, arg...) (comp->emit_method_table->fun(comp->emit, ##arg))
#define EMIT_INLINE_ASM(fun, arg...) (comp->emit_inline_asm_method_table->fun(comp->emit_inline_asm, ##arg))
#define EMIT_OPT_NONE (0)
#define EMIT_OPT_BYTE_CODE (1)
@ -47,7 +48,6 @@ typedef struct _compiler_t {
pass_kind_t pass;
int next_label;
int max_num_labels;
int break_label;
int continue_label;
@ -66,6 +66,9 @@ typedef struct _compiler_t {
emit_t *emit; // current emitter
const emit_method_table_t *emit_method_table; // current emit method table
emit_inline_asm_t *emit_inline_asm; // current emitter for inline asm
const emit_inline_asm_method_table_t *emit_inline_asm_method_table; // current emit method table for inline asm
} compiler_t;
py_parse_node_t fold_constants(py_parse_node_t pn) {
@ -2389,7 +2392,7 @@ void compile_scope(compiler_t *comp, scope_t *scope, pass_kind_t pass) {
apply_to_single_or_list(comp, pns->nodes[1], PN_typedargslist, compile_scope_func_param);
}
assert(pns->nodes[2] == 0); // 2 is something...
assert(PY_PARSE_NODE_IS_NULL(pns->nodes[2])); // 2 is something...
compile_node(comp, pns->nodes[3]); // 3 is function body
// emit return if it wasn't the last opcode
@ -2492,9 +2495,77 @@ void compile_scope(compiler_t *comp, scope_t *scope, pass_kind_t pass) {
EMIT(end_pass);
// update maximim number of labels needed
if (comp->next_label > comp->max_num_labels) {
comp->max_num_labels = comp->next_label;
}
void compile_scope_inline_asm(compiler_t *comp, scope_t *scope, pass_kind_t pass) {
comp->pass = pass;
comp->scope_cur = scope;
comp->next_label = 1;
if (scope->kind != SCOPE_FUNCTION) {
printf("Error: inline assembler must be a function\n");
return;
}
// get the function definition parse node
assert(PY_PARSE_NODE_IS_STRUCT(scope->pn));
py_parse_node_struct_t *pns = (py_parse_node_struct_t*)scope->pn;
assert(PY_PARSE_NODE_STRUCT_KIND(pns) == PN_funcdef);
//qstr f_id = PY_PARSE_NODE_LEAF_ARG(pns->nodes[0]); // name
scope->num_params = 0;
assert(PY_PARSE_NODE_IS_NULL(pns->nodes[1])); // arguments
assert(PY_PARSE_NODE_IS_NULL(pns->nodes[2])); // type
py_parse_node_t pn_body = pns->nodes[3]; // body
py_parse_node_t *nodes;
int num = list_get(&pn_body, PN_suite_block_stmts, &nodes);
if (comp->pass > PASS_1) {
EMIT_INLINE_ASM(start_pass, comp->pass, comp->scope_cur);
}
if (comp->pass == PASS_3) {
//printf("----\n");
scope_print_info(scope);
}
for (int i = 0; i < num; i++) {
assert(PY_PARSE_NODE_IS_STRUCT(nodes[i]));
py_parse_node_struct_t *pns2 = (py_parse_node_struct_t*)nodes[i];
assert(PY_PARSE_NODE_STRUCT_KIND(pns2) == PN_expr_stmt);
assert(PY_PARSE_NODE_IS_STRUCT(pns2->nodes[0]));
assert(PY_PARSE_NODE_IS_NULL(pns2->nodes[1]));
pns2 = (py_parse_node_struct_t*)pns2->nodes[0];
assert(PY_PARSE_NODE_STRUCT_KIND(pns2) == PN_power);
assert(PY_PARSE_NODE_IS_ID(pns2->nodes[0]));
assert(PY_PARSE_NODE_IS_STRUCT_KIND(pns2->nodes[1], PN_trailer_paren));
assert(PY_PARSE_NODE_IS_NULL(pns2->nodes[2]));
qstr op = PY_PARSE_NODE_LEAF_ARG(pns2->nodes[0]);
pns2 = (py_parse_node_struct_t*)pns2->nodes[1]; // PN_trailer_paren
py_parse_node_t *pn_arg;
int n_args = list_get(&pns2->nodes[0], PN_arglist, &pn_arg);
// emit instructions
if (strcmp(qstr_str(op), "label") == 0) {
if (!(n_args == 1 && PY_PARSE_NODE_IS_ID(pn_arg[0]))) {
printf("SyntaxError: inline assembler 'label' requires 1 argument\n");
return;
}
int lab = comp_next_label(comp);
if (pass > PASS_1) {
EMIT_INLINE_ASM(label, lab, PY_PARSE_NODE_LEAF_ARG(pn_arg[0]));
}
} else {
if (pass > PASS_1) {
EMIT_INLINE_ASM(op, op, n_args, pn_arg);
}
}
}
if (comp->pass > PASS_1) {
EMIT_INLINE_ASM(end_pass);
}
}
@ -2557,55 +2628,81 @@ void py_compile(py_parse_node_t pn) {
comp->qstr_native = qstr_from_str_static("native");
comp->qstr_asm_thumb = qstr_from_str_static("asm_thumb");
comp->max_num_labels = 0;
comp->break_label = 0;
comp->continue_label = 0;
comp->except_nest_level = 0;
comp->scope_head = NULL;
comp->scope_cur = NULL;
comp->emit = emit_pass1_new(comp->qstr___class__);
comp->emit_method_table = &emit_pass1_method_table;
// optimise constants
pn = fold_constants(pn);
// set the outer scope
scope_new_and_link(comp, SCOPE_MODULE, pn, EMIT_OPT_NONE);
// compile pass 1
comp->emit = emit_pass1_new(comp->qstr___class__);
comp->emit_method_table = &emit_pass1_method_table;
comp->emit_inline_asm = NULL;
comp->emit_inline_asm_method_table = NULL;
uint max_num_labels = 0;
for (scope_t *s = comp->scope_head; s != NULL; s = s->next) {
compile_scope(comp, s, PASS_1);
if (s->emit_options == EMIT_OPT_ASM_THUMB) {
compile_scope_inline_asm(comp, s, PASS_1);
} else {
compile_scope(comp, s, PASS_1);
}
// update maximim number of labels needed
if (comp->next_label > max_num_labels) {
max_num_labels = comp->next_label;
}
}
// compute some things related to scope and identifiers
for (scope_t *s = comp->scope_head; s != NULL; s = s->next) {
compile_scope_compute_things(comp, s);
}
// finish with pass 1
emit_pass1_free(comp->emit);
// compile pass 2 and 3
emit_t *emit_bc = NULL;
emit_t *emit_x64 = NULL;
emit_inline_asm_t *emit_inline_thumb = NULL;
for (scope_t *s = comp->scope_head; s != NULL; s = s->next) {
switch (s->emit_options) {
case EMIT_OPT_NATIVE_PYTHON:
if (emit_x64 == NULL) {
emit_x64 = emit_x64_new(comp->max_num_labels);
}
comp->emit = emit_x64;
comp->emit_method_table = &emit_x64_method_table;
break;
if (s->emit_options == EMIT_OPT_ASM_THUMB) {
if (emit_inline_thumb == NULL) {
emit_inline_thumb = emit_inline_thumb_new(max_num_labels);
}
comp->emit = NULL;
comp->emit_method_table = NULL;
comp->emit_inline_asm = emit_inline_thumb;
comp->emit_inline_asm_method_table = &emit_inline_thumb_method_table;
compile_scope_inline_asm(comp, s, PASS_2);
compile_scope_inline_asm(comp, s, PASS_3);
} else {
switch (s->emit_options) {
case EMIT_OPT_NATIVE_PYTHON:
if (emit_x64 == NULL) {
emit_x64 = emit_x64_new(max_num_labels);
}
comp->emit = emit_x64;
comp->emit_method_table = &emit_x64_method_table;
break;
//case EMIT_OPT_ASM_THUMB:
//if (em
default:
if (emit_bc == NULL) {
emit_bc = emit_bc_new(comp->max_num_labels);
}
comp->emit = emit_bc;
comp->emit_method_table = &emit_bc_method_table;
break;
default:
if (emit_bc == NULL) {
emit_bc = emit_bc_new(max_num_labels);
}
comp->emit = emit_bc;
comp->emit_method_table = &emit_bc_method_table;
break;
}
compile_scope(comp, s, PASS_2);
compile_scope(comp, s, PASS_3);
}
compile_scope(comp, s, PASS_2);
compile_scope(comp, s, PASS_3);
}
m_free(comp);

13
py/emit.h
View File

@ -128,3 +128,16 @@ emit_t *emit_cpython_new(uint max_num_labels);
emit_t *emit_bc_new(uint max_num_labels);
emit_t *emit_x64_new(uint max_num_labels);
emit_t *emit_thumb_new(uint max_num_labels);
typedef struct _emit_inline_asm_t emit_inline_asm_t;
typedef struct _emit_inline_asm_method_table_t {
void (*start_pass)(emit_inline_asm_t *emit, pass_kind_t pass, scope_t *scope);
void (*end_pass)(emit_inline_asm_t *emit);
void (*label)(emit_inline_asm_t *emit, int label_num, qstr label_id);
void (*op)(emit_inline_asm_t *emit, qstr op, int n_args, py_parse_node_t *args);
} emit_inline_asm_method_table_t;
extern const emit_inline_asm_method_table_t emit_inline_thumb_method_table;
emit_inline_asm_t *emit_inline_thumb_new(uint max_num_labels);

2
py/emitbc.c
View File

@ -17,7 +17,6 @@
struct _emit_t {
pass_kind_t pass;
int next_label;
int stack_size;
bool last_emit_was_return_value;
@ -55,7 +54,6 @@ static void emit_bc_set_native_types(emit_t *emit, bool do_native_types) {
static void emit_bc_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
emit->pass = pass;
emit->next_label = 1;
emit->stack_size = 0;
emit->last_emit_was_return_value = false;
emit->scope = scope;

2
py/emitcpy.c
View File

@ -18,7 +18,6 @@
struct _emit_t {
int pass;
int next_label;
int byte_code_offset;
int stack_size;
bool last_emit_was_return_value;
@ -44,7 +43,6 @@ static void emit_cpy_set_native_types(emit_t *emit, bool do_native_types) {
static void emit_cpy_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
emit->pass = pass;
emit->next_label = 1;
emit->byte_code_offset = 0;
emit->stack_size = 0;
emit->last_emit_was_return_value = false;

173
py/emitinlinethumb.c Normal file
View File

@ -0,0 +1,173 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "misc.h"
#include "lexer.h"
#include "machine.h"
#include "parse.h"
#include "scope.h"
#include "runtime.h"
#include "emit.h"
#include "asmthumb.h"
#ifdef EMIT_ENABLE_THUMB
struct _emit_inline_asm_t {
int pass;
scope_t *scope;
int max_num_labels;
qstr *label_lookup;
asm_thumb_t *as;
};
emit_inline_asm_t *emit_inline_thumb_new(uint max_num_labels) {
emit_inline_asm_t *emit = m_new(emit_inline_asm_t, 1);
emit->max_num_labels = max_num_labels;
emit->label_lookup = m_new(qstr, max_num_labels);
memset(emit->label_lookup, 0, emit->max_num_labels * sizeof(qstr));
emit->as = asm_thumb_new(max_num_labels);
return emit;
}
static void emit_inline_thumb_start_pass(emit_inline_asm_t *emit, pass_kind_t pass, scope_t *scope) {
emit->pass = pass;
emit->scope = scope;
asm_thumb_start_pass(emit->as, pass);
asm_thumb_entry(emit->as, 0);
}
static void emit_inline_thumb_end_pass(emit_inline_asm_t *emit) {
asm_thumb_exit(emit->as);
asm_thumb_end_pass(emit->as);
if (emit->pass == PASS_3) {
py_fun_t f = asm_thumb_get_code(emit->as);
rt_assign_inline_asm_code(emit->scope->unique_code_id, f, asm_thumb_get_code_size(emit->as), emit->scope->num_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;
asm_thumb_label_assign(emit->as, label_num);
}
static bool check_n_arg(qstr op, int n_args, int wanted_n_args) {
if (wanted_n_args == n_args) {
return true;
} else {
printf("SyntaxError: '%s' expects %d arguments'\n", qstr_str(op), wanted_n_args);
return false;
}
}
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])) {
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]);
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);
return 0;
}
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])) {
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]);
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;
}
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])) {
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]);
for (int i = 0; i < emit->max_num_labels; i++) {
if (emit->label_lookup[i] == label_qstr) {
return i;
}
}
printf("SyntaxError: label '%s' not defined\n", qstr_str(label_qstr));
return 0;
}
static void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, int n_args, py_parse_node_t *pn_arg) {
// TODO perhaps make two tables:
// 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
// 1 arg
if (strcmp(qstr_str(op), "bgt") == 0) {
if (!check_n_arg(op, n_args, 1)) {
return;
}
int label_num = get_arg_label(emit, op, pn_arg, 0);
asm_thumb_bgt_n(emit->as, label_num);
// 2 args
} else if (strcmp(qstr_str(op), "movs") == 0) {
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);
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);
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);
asm_thumb_cmp_rlo_i8(emit->as, rlo, i8);
// 3 args
} else if (strcmp(qstr_str(op), "subs") == 0) {
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);
asm_thumb_subs_rlo_rlo_i3(emit->as, rlo_dest, rlo_src, i3_src);
// unknown op
} else {
printf("SyntaxError: unsupported ARM Thumb instruction '%s'\n", qstr_str(op));
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_label,
emit_inline_thumb_op,
};
#endif // EMIT_ENABLE_THUMB

4
py/emitthumb.c
View File

@ -652,8 +652,8 @@ static void emit_thumb_compare_op(emit_t *emit, rt_compare_op_t op) {
emit_pre_pop_reg_reg(emit, REG_ARG_2, REG_ARG_1);
asm_thumb_cmp_reg_reg(emit->as, REG_ARG_1, REG_ARG_2);
asm_thumb_ite_ge(emit->as);
asm_thumb_mov_reg_i8(emit->as, REG_RET, 0); // if r0 >= r1
asm_thumb_mov_reg_i8(emit->as, REG_RET, 1); // if r0 < r1
asm_thumb_movs_rlo_i8(emit->as, REG_RET, 0); // if r0 >= r1
asm_thumb_movs_rlo_i8(emit->as, REG_RET, 1); // if r0 < r1
emit_post_push_reg(emit, REG_RET);
} else {
emit_pre_pop_reg_reg(emit, REG_ARG_3, REG_ARG_2);

2
py/parse.c
View File

@ -228,7 +228,7 @@ static void push_result_token(parser_t *parser, const py_lexer_t *lex) {
}
if (dec) {
pn = py_parse_node_new_leaf(PY_PARSE_NODE_DECIMAL, qstr_from_strn_copy(str, len));
} else if (small_int && -0x10000 <= int_val && int_val <= 0xffff) {
} else if (small_int && -0x10000000 <= int_val && int_val <= 0xfffffff) { // XXX check this range formula!
pn = py_parse_node_new_leaf(PY_PARSE_NODE_SMALL_INT, int_val);
} else {
pn = py_parse_node_new_leaf(PY_PARSE_NODE_INTEGER, qstr_from_strn_copy(str, len));

91
py/runtime.c
View File

@ -40,6 +40,7 @@ typedef enum {
O_FUN_2,
O_FUN_N,
O_FUN_BC,
O_FUN_ASM,
O_BOUND_METH,
O_LIST,
O_SET,
@ -73,14 +74,18 @@ typedef struct _py_obj_base_t {
float_t flt;
#endif
struct { // for O_FUN_[012N]
void *fun;
int n_args;
void *fun;
} u_fun;
struct { // for O_FUN_BC
int n_args;
byte *code;
uint len;
int n_args;
} u_fun_bc;
struct { // for O_FUN_ASM
int n_args;
void *fun;
} u_fun_asm;
struct { // for O_BOUND_METH
py_obj_t meth;
py_obj_t self;
@ -275,21 +280,26 @@ static qstr q_len;
static qstr q___build_class__;
typedef enum {
PY_CODE_NATIVE,
PY_CODE_NONE,
PY_CODE_BYTE,
PY_CODE_NATIVE,
PY_CODE_INLINE_ASM,
} py_code_kind_t;
typedef struct _py_code_t {
py_code_kind_t kind;
int n_args;
union {
struct {
py_fun_t fun;
} u_native;
struct {
byte *code;
uint len;
} u_byte;
struct {
py_fun_t fun;
} u_native;
struct {
py_fun_t fun;
} u_inline_asm;
};
} py_code_t;
@ -368,10 +378,30 @@ int rt_get_new_unique_code_id() {
return next_unique_code_id++;
}
void rt_assign_native_code(int unique_code_id, py_fun_t fun, uint len, int n_args) {
static void alloc_unique_codes() {
if (unique_codes == NULL) {
unique_codes = m_new(py_code_t, next_unique_code_id);
for (int i = 0; i < next_unique_code_id; i++) {
unique_codes[i].kind = PY_CODE_NONE;
}
}
}
void rt_assign_byte_code(int unique_code_id, byte *code, uint len, int n_args) {
alloc_unique_codes();
assert(unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_BYTE;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_byte.code = code;
unique_codes[unique_code_id].u_byte.len = len;
DEBUG_printf("assign byte code: id=%d code=%p len=%u n_args=%d\n", unique_code_id, code, len, n_args);
}
void rt_assign_native_code(int unique_code_id, py_fun_t fun, uint len, int n_args) {
alloc_unique_codes();
assert(1 <= unique_code_id && unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_NATIVE;
unique_codes[unique_code_id].n_args = n_args;
@ -392,17 +422,27 @@ void rt_assign_native_code(int unique_code_id, py_fun_t fun, uint len, int n_arg
}
}
void rt_assign_byte_code(int unique_code_id, byte *code, uint len, int n_args) {
if (unique_codes == NULL) {
unique_codes = m_new(py_code_t, next_unique_code_id);
}
assert(unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_BYTE;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_byte.code = code;
unique_codes[unique_code_id].u_byte.len = len;
void rt_assign_inline_asm_code(int unique_code_id, py_fun_t fun, uint len, int n_args) {
alloc_unique_codes();
DEBUG_printf("assign byte code: id=%d code=%p len=%u n_args=%d\n", unique_code_id, code, len, n_args);
assert(1 <= unique_code_id && unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_INLINE_ASM;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_inline_asm.fun = fun;
DEBUG_printf("assign inline asm code: id=%d fun=%p len=%u n_args=%d\n", unique_code_id, fun, len, n_args);
byte *fun_data = (byte*)(((machine_uint_t)fun) & (~1)); // need to clear lower bit in case it's thumb code
for (int i = 0; i < 128 && i < len; i++) {
if (i > 0 && i % 16 == 0) {
DEBUG_printf("\n");
}
DEBUG_printf(" %02x", fun_data[i]);
}
DEBUG_printf("\n");
if (fp_native != NULL) {
fwrite(fun_data, len, 1, fp_native);
}
}
const char *py_obj_get_type_str(py_obj_t o_in) {
@ -649,6 +689,12 @@ py_obj_t rt_make_function_from_id(int unique_code_id) {
py_code_t *c = &unique_codes[unique_code_id];
py_obj_base_t *o = m_new(py_obj_base_t, 1);
switch (c->kind) {
case PY_CODE_BYTE:
o->kind = O_FUN_BC;
o->u_fun_bc.n_args = c->n_args;
o->u_fun_bc.code = c->u_byte.code;
o->u_fun_bc.len = c->u_byte.len;
break;
case PY_CODE_NATIVE:
switch (c->n_args) {
case 0: o->kind = O_FUN_0; break;
@ -658,11 +704,10 @@ py_obj_t rt_make_function_from_id(int unique_code_id) {
}
o->u_fun.fun = c->u_native.fun;
break;
case PY_CODE_BYTE:
o->kind = O_FUN_BC;
o->u_fun_bc.code = c->u_byte.code;
o->u_fun_bc.len = c->u_byte.len;
o->u_fun_bc.n_args = c->n_args;
case PY_CODE_INLINE_ASM:
o->kind = O_FUN_ASM;
o->u_fun_asm.n_args = c->n_args;
o->u_fun_asm.fun = c->u_inline_asm.fun;
break;
default:
assert(0);
@ -695,8 +740,8 @@ py_obj_t rt_make_function(int n_args, py_fun_t code) {
// assumes code is a pointer to a py_fun_t (i think this is safe...)
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FUN_N;
o->u_fun.fun = code;
o->u_fun.n_args = n_args;
o->u_fun.fun = code;
return o;
}

3
py/runtime.h
View File

@ -87,8 +87,9 @@ extern py_obj_t py_const_true;
void rt_init();
void rt_deinit();
int rt_get_new_unique_code_id();
void rt_assign_native_code(int unique_code_id, py_fun_t f, uint len, int n_args);
void rt_assign_byte_code(int unique_code_id, byte *code, uint len, int n_args);
void rt_assign_native_code(int unique_code_id, py_fun_t f, uint len, int n_args);
void rt_assign_inline_asm_code(int unique_code_id, py_fun_t f, uint len, int n_args);
py_fun_t rt_get_code(qstr id);
void py_obj_print(py_obj_t o);
int rt_is_true(py_obj_t arg);