Commit 5bfb7599 authored by Damien's avatar Damien
Browse files

Incorporate emit_thumb into new emit framework.

parent 6cdd3af6
CC = gcc
CFLAGS = -Wall -ansi -std=gnu99 -Os -DEMIT_ENABLE_CPY -DEMIT_ENABLE_X64 #-DNDEBUG
CFLAGS = -Wall -ansi -std=gnu99 -Os -DEMIT_ENABLE_CPY -DEMIT_ENABLE_X64 -DEMIT_ENABLE_THUMB #-DNDEBUG
LDFLAGS =
SRC = \
......
......@@ -28,7 +28,7 @@ struct _asm_thumb_t {
uint stack_adjust;
};
asm_thumb_t *asm_thumb_new() {
asm_thumb_t *asm_thumb_new(uint max_num_labels) {
asm_thumb_t *as;
as = m_new(asm_thumb_t, 1);
......@@ -36,7 +36,8 @@ asm_thumb_t *asm_thumb_new() {
as->code_offset = 0;
as->code_size = 0;
as->code_base = NULL;
as->label_offsets = NULL;
as->max_num_labels = max_num_labels;
as->label_offsets = m_new(int, max_num_labels);
as->num_locals = 0;
return as;
......@@ -65,23 +66,13 @@ 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_1) {
as->max_num_labels = 0;
} else {
if (pass == ASM_THUMB_PASS_2) {
memset(as->label_offsets, -1, as->max_num_labels * sizeof(int));
}
if (pass == ASM_THUMB_PASS_2) {
memset(as->label_offsets, -1, as->max_num_labels * sizeof(int));
}
}
void asm_thumb_end_pass(asm_thumb_t *as) {
if (as->pass == ASM_THUMB_PASS_1) {
// calculate number of labels need
if (as->next_label > as->max_num_labels) {
as->max_num_labels = as->next_label;
}
as->label_offsets = m_new(int, as->max_num_labels);
} else if (as->pass == ASM_THUMB_PASS_2) {
if (as->pass == ASM_THUMB_PASS_2) {
// calculate size of code in bytes
as->code_size = as->code_offset;
as->code_base = m_new(byte, as->code_size);
......@@ -226,20 +217,23 @@ int asm_thumb_label_new(asm_thumb_t *as) {
}
void asm_thumb_label_assign(asm_thumb_t *as, int label) {
if (as->pass > ASM_THUMB_PASS_1) {
assert(label < as->max_num_labels);
if (as->pass == ASM_THUMB_PASS_2) {
// assign label offset
assert(as->label_offsets[label] == -1);
as->label_offsets[label] = as->code_offset;
} else if (as->pass == ASM_THUMB_PASS_3) {
// ensure label offset has not changed from PASS_2 to PASS_3
//printf("l%d: (at %d=%ld)\n", label, as->label_offsets[label], as->code_offset);
assert(as->label_offsets[label] == as->code_offset);
}
assert(label < as->max_num_labels);
if (as->pass == ASM_THUMB_PASS_2) {
// assign label offset
assert(as->label_offsets[label] == -1);
as->label_offsets[label] = as->code_offset;
} else if (as->pass == ASM_THUMB_PASS_3) {
// ensure label offset has not changed from PASS_2 to PASS_3
//printf("l%d: (at %d=%ld)\n", label, as->label_offsets[label], as->code_offset);
assert(as->label_offsets[label] == as->code_offset);
}
}
static int get_label_dest(asm_thumb_t *as, int label) {
assert(label < as->max_num_labels);
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) {
assert(rlo_dest < REG_R8);
......@@ -339,23 +333,21 @@ void asm_thumb_ite_ge(asm_thumb_t *as) {
#define OP_BW_LO(byte_offset) (0xb800 | (((byte_offset) >> 1) & 0x07ff))
void asm_thumb_b_label(asm_thumb_t *as, int label) {
if (as->pass > ASM_THUMB_PASS_1) {
int dest = as->label_offsets[label];
int rel = dest - as->code_offset;
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
if (SIGNED_FIT12(rel)) {
asm_thumb_write_op16(as, OP_B(rel));
} else {
goto large_jump;
}
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 (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
if (SIGNED_FIT12(rel)) {
asm_thumb_write_op16(as, OP_B(rel));
} else {
// is a forwards jump, so need to assume it's large
large_jump:
asm_thumb_write_op32(as, OP_BW_HI(rel), OP_BW_LO(rel));
goto large_jump;
}
} else {
// is a forwards jump, so need to assume it's large
large_jump:
asm_thumb_write_op32(as, OP_BW_HI(rel), OP_BW_LO(rel));
}
}
......@@ -372,23 +364,21 @@ void asm_thumb_cmp_reg_bz_label(asm_thumb_t *as, uint rlo, int label) {
asm_thumb_write_op16(as, OP_CMP_REG_IMM(rlo, 0));
// branch if equal
if (as->pass > ASM_THUMB_PASS_1) {
int dest = as->label_offsets[label];
int rel = dest - as->code_offset;
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
if (SIGNED_FIT9(rel)) {
asm_thumb_write_op16(as, OP_BEQ(rel));
} else {
goto large_jump;
}
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 (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
if (SIGNED_FIT9(rel)) {
asm_thumb_write_op16(as, OP_BEQ(rel));
} else {
// is a forwards jump, so need to assume it's large
large_jump:
asm_thumb_write_op32(as, OP_BEQW_HI(rel), OP_BEQW_LO(rel));
goto large_jump;
}
} else {
// is a forwards jump, so need to assume it's large
large_jump:
asm_thumb_write_op32(as, OP_BEQW_HI(rel), OP_BEQW_LO(rel));
}
}
......
......@@ -28,7 +28,7 @@
typedef struct _asm_thumb_t asm_thumb_t;
asm_thumb_t *asm_thumb_new();
asm_thumb_t *asm_thumb_new(uint max_num_labels);
void asm_thumb_free(asm_thumb_t *as, bool free_code);
void asm_thumb_start_pass(asm_thumb_t *as, int pass);
void asm_thumb_end_pass(asm_thumb_t *as);
......
......@@ -30,6 +30,7 @@ typedef enum {
#define EMIT_OPT_NONE (0)
#define EMIT_OPT_BYTE_CODE (1)
#define EMIT_OPT_NATIVE_PYTHON (2)
#define EMIT_OPT_ASM_THUMB (3)
typedef struct _compiler_t {
qstr qstr___class__;
......@@ -41,6 +42,7 @@ typedef struct _compiler_t {
qstr qstr_assertion_error;
qstr qstr_micropython;
qstr qstr_native;
qstr qstr_asm_thumb;
pass_kind_t pass;
......@@ -759,6 +761,8 @@ static bool compile_built_in_decorator(compiler_t *comp, int name_len, py_parse_
qstr attr = PY_PARSE_NODE_LEAF_ARG(name_nodes[1]);
if (attr == comp->qstr_native) {
*emit_options = EMIT_OPT_NATIVE_PYTHON;
} else if (attr == comp->qstr_asm_thumb) {
*emit_options = EMIT_OPT_ASM_THUMB;
} else {
printf("SyntaxError: invalid micropython decorator\n");
}
......@@ -2551,6 +2555,7 @@ void py_compile(py_parse_node_t pn) {
comp->qstr_assertion_error = qstr_from_str_static("AssertionError");
comp->qstr_micropython = qstr_from_str_static("micropython");
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;
......@@ -2588,6 +2593,9 @@ void py_compile(py_parse_node_t pn) {
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);
......
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