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Commit ff8ed77c authored by Damien's avatar Damien
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Improve push/pop and register usage for native emit.

parent 13ed3a65
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py/emitnative.c
View file @ ff8ed77c
......@@ -90,10 +90,10 @@
#endif
typedef enum {
NEED_TO_PUSH_NOTHING,
NEED_TO_PUSH_REG,
NEED_TO_PUSH_IMM,
} need_to_push_t;
STACK_VALUE,
STACK_REG,
STACK_IMM,
} stack_info_kind_t;
typedef enum {
VTYPE_UNBOUND,
......@@ -105,24 +105,31 @@ typedef enum {
VTYPE_BUILTIN_V_INT,
} vtype_kind_t;
typedef struct _stack_info_t {
vtype_kind_t vtype;
stack_info_kind_t kind;
union {
int u_reg;
machine_int_t u_imm;
};
} stack_info_t;
struct _emit_t {
int pass;
bool do_viper_types;
int all_vtype_alloc;
vtype_kind_t *all_vtype;
int local_vtype_alloc;
vtype_kind_t *local_vtype;
vtype_kind_t *stack_vtype;
int stack_info_alloc;
stack_info_t *stack_info;
int stack_start;
int stack_size;
bool last_emit_was_return_value;
need_to_push_t need_to_push;
vtype_kind_t last_vtype;
int last_reg;
int64_t last_imm;
scope_t *scope;
#if defined(N_X64)
......@@ -135,7 +142,8 @@ struct _emit_t {
emit_t *EXPORT_FUN(new)(uint max_num_labels) {
emit_t *emit = m_new(emit_t, 1);
emit->do_viper_types = false;
emit->all_vtype = NULL;
emit->local_vtype = NULL;
emit->stack_info = NULL;
#if defined(N_X64)
emit->as = asm_x64_new(max_num_labels);
#elif defined(N_THUMB)
......@@ -153,24 +161,33 @@ static void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
emit->stack_start = 0;
emit->stack_size = 0;
emit->last_emit_was_return_value = false;
emit->need_to_push = NEED_TO_PUSH_NOTHING;
emit->scope = scope;
if (emit->all_vtype == NULL) {
emit->all_vtype_alloc = scope->num_locals + scope->stack_size + 100; // XXX don't know stack size on entry, should be maximum over all scopes
emit->all_vtype = m_new(vtype_kind_t, emit->all_vtype_alloc);
emit->local_vtype = emit->all_vtype;
emit->stack_vtype = emit->all_vtype + scope->num_locals;
if (emit->local_vtype == NULL) {
emit->local_vtype_alloc = scope->num_locals + 20; // XXX should be maximum over all scopes
emit->local_vtype = m_new(vtype_kind_t, emit->local_vtype_alloc);
}
if (emit->stack_info == NULL) {
emit->stack_info_alloc = scope->stack_size + 50; // XXX don't know stack size on entry, should be maximum over all scopes
emit->stack_info = m_new(stack_info_t, emit->stack_info_alloc);
}
if (emit->do_viper_types) {
for (int i = 0; i < emit->all_vtype_alloc; i++) {
emit->all_vtype[i] = VTYPE_UNBOUND;
}
// TODO set types of arguments based on type signature
for (int i = 0; i < emit->local_vtype_alloc; i++) {
emit->local_vtype[i] = VTYPE_UNBOUND;
}
for (int i = 0; i < emit->stack_info_alloc; i++) {
emit->stack_info[i].kind = STACK_VALUE;
emit->stack_info[i].vtype = VTYPE_UNBOUND;
}
} else {
for (int i = 0; i < emit->all_vtype_alloc; i++) {
emit->all_vtype[i] = VTYPE_PYOBJ;
for (int i = 0; i < emit->local_vtype_alloc; i++) {
emit->local_vtype[i] = VTYPE_PYOBJ;
}
for (int i = 0; i < emit->stack_info_alloc; i++) {
emit->stack_info[i].kind = STACK_VALUE;
emit->stack_info[i].vtype = VTYPE_PYOBJ;
}
}
......@@ -279,148 +296,150 @@ static void adjust_stack(emit_t *emit, int stack_size_delta) {
}
}
static void stack_settle(emit_t *emit) {
switch (emit->need_to_push) {
case NEED_TO_PUSH_NOTHING:
break;
case NEED_TO_PUSH_REG:
emit->stack_vtype[emit->stack_size] = emit->last_vtype;
ASM_MOV_REG_TO_LOCAL(emit->last_reg, emit->stack_start + emit->stack_size);
adjust_stack(emit, 1);
break;
case NEED_TO_PUSH_IMM:
emit->stack_vtype[emit->stack_size] = emit->last_vtype;
ASM_MOV_IMM_TO_LOCAL(emit->last_imm, emit->stack_start + emit->stack_size);
adjust_stack(emit, 1);
break;
}
emit->need_to_push = NEED_TO_PUSH_NOTHING;
}
/*
static void emit_pre_raw(emit_t *emit, int stack_size_delta) {
adjust_stack(emit, stack_size_delta);
emit->last_emit_was_return_value = false;
}
*/
// this must be called at start of emit functions
static void emit_pre(emit_t *emit) {
stack_settle(emit);
emit_pre_raw(emit, 0);
emit->last_emit_was_return_value = false;
// settle the stack
/*
if (regs_needed != 0) {
for (int i = 0; i < emit->stack_size; i++) {
switch (emit->stack_info[i].kind) {
case STACK_VALUE:
break;
case STACK_REG:
// TODO only push reg if in regs_needed
emit->stack_info[i].kind = STACK_VALUE;
ASM_MOV_REG_TO_LOCAL(emit->stack_info[i].u_reg, emit->stack_start + i);
break;
case STACK_IMM:
// don't think we ever need to push imms for settling
//ASM_MOV_IMM_TO_LOCAL(emit->last_imm, emit->stack_start + i);
break;
}
}
}
*/
}
static vtype_kind_t peek_vtype(emit_t *emit) {
switch (emit->need_to_push) {
case NEED_TO_PUSH_NOTHING:
return emit->stack_vtype[emit->stack_size - 1];
return emit->stack_info[emit->stack_size - 1].vtype;
}
case NEED_TO_PUSH_REG:
case NEED_TO_PUSH_IMM:
return emit->last_vtype;
static void need_reg_single(emit_t *emit, int reg_needed) {
for (int i = 0; i < emit->stack_size; i++) {
stack_info_t *si = &emit->stack_info[i];
if (si->kind == STACK_REG && si->u_reg == reg_needed) {
si->kind = STACK_VALUE;
ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
}
}
}
default:
assert(0);
return VTYPE_UNBOUND;
static void need_reg_all(emit_t *emit) {
for (int i = 0; i < emit->stack_size; i++) {
stack_info_t *si = &emit->stack_info[i];
if (si->kind == STACK_REG) {
si->kind = STACK_VALUE;
ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
}
}
}
static void emit_pre_pop_reg(emit_t *emit, vtype_kind_t *vtype, int reg_dest) {
switch (emit->need_to_push) {
case NEED_TO_PUSH_NOTHING:
*vtype = emit->stack_vtype[emit->stack_size - 1];
ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - 1, reg_dest);
emit_pre_raw(emit, -1);
emit->last_emit_was_return_value = false;
adjust_stack(emit, -1);
need_reg_single(emit, reg_dest);
stack_info_t *si = &emit->stack_info[emit->stack_size];
*vtype = si->vtype;
switch (si->kind) {
case STACK_VALUE:
ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size, reg_dest);
break;
case NEED_TO_PUSH_REG:
emit_pre_raw(emit, 0);
*vtype = emit->last_vtype;
if (emit->last_reg != reg_dest) {
ASM_MOV_REG_TO_REG(emit->last_reg, reg_dest);
case STACK_REG:
if (si->u_reg != reg_dest) {
ASM_MOV_REG_TO_REG(si->u_reg, reg_dest);
}
break;
case NEED_TO_PUSH_IMM:
emit_pre_raw(emit, 0);
*vtype = emit->last_vtype;
ASM_MOV_IMM_TO_REG(emit->last_imm, reg_dest);
case STACK_IMM:
ASM_MOV_IMM_TO_REG(si->u_imm, reg_dest);
break;
}
emit->need_to_push = NEED_TO_PUSH_NOTHING;
}
static void emit_pre_pop_reg_reg(emit_t *emit, vtype_kind_t *vtypea, int rega, vtype_kind_t *vtypeb, int regb) {
emit_pre_pop_reg(emit, vtypea, rega);
*vtypeb = emit->stack_vtype[emit->stack_size - 1];
ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - 1, regb);
adjust_stack(emit, -1);
emit_pre_pop_reg(emit, vtypeb, regb);
}
static void emit_pre_pop_reg_reg_reg(emit_t *emit, vtype_kind_t *vtypea, int rega, vtype_kind_t *vtypeb, int regb, vtype_kind_t *vtypec, int regc) {
emit_pre_pop_reg(emit, vtypea, rega);
*vtypeb = emit->stack_vtype[emit->stack_size - 1];
*vtypec = emit->stack_vtype[emit->stack_size - 2];
ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - 1, regb);
ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - 2, regc);
adjust_stack(emit, -2);
emit_pre_pop_reg(emit, vtypeb, regb);
emit_pre_pop_reg(emit, vtypec, regc);
}
static void emit_post(emit_t *emit) {
}
static void emit_post_push_reg(emit_t *emit, vtype_kind_t vtype, int reg) {
emit->need_to_push = NEED_TO_PUSH_REG;
emit->last_vtype = vtype;
emit->last_reg = reg;
stack_info_t *si = &emit->stack_info[emit->stack_size];
si->vtype = vtype;
si->kind = STACK_REG;
si->u_reg = reg;
adjust_stack(emit, 1);
}
static void emit_post_push_imm(emit_t *emit, vtype_kind_t vtype, machine_int_t imm) {
emit->need_to_push = NEED_TO_PUSH_IMM;
emit->last_vtype = vtype;
emit->last_imm = imm;
stack_info_t *si = &emit->stack_info[emit->stack_size];
si->vtype = vtype;
si->kind = STACK_IMM;
si->u_imm = imm;
adjust_stack(emit, 1);
}
static void emit_post_push_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb) {
emit->stack_vtype[emit->stack_size] = vtypea;
ASM_MOV_REG_TO_LOCAL(rega, emit->stack_start + emit->stack_size);
emit->need_to_push = NEED_TO_PUSH_REG;
emit->last_vtype = vtypeb;
emit->last_reg = regb;
adjust_stack(emit, 1);
emit_post_push_reg(emit, vtypea, rega);
emit_post_push_reg(emit, vtypeb, regb);
}
static void emit_post_push_reg_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb, vtype_kind_t vtypec, int regc) {
emit->stack_vtype[emit->stack_size] = vtypea;
emit->stack_vtype[emit->stack_size + 1] = vtypeb;
emit->stack_vtype[emit->stack_size + 2] = vtypec;
ASM_MOV_REG_TO_LOCAL(rega, emit->stack_start + emit->stack_size);
ASM_MOV_REG_TO_LOCAL(regb, emit->stack_start + emit->stack_size + 1);
ASM_MOV_REG_TO_LOCAL(regc, emit->stack_start + emit->stack_size + 2);
adjust_stack(emit, 3);
emit_post_push_reg(emit, vtypea, rega);
emit_post_push_reg(emit, vtypeb, regb);
emit_post_push_reg(emit, vtypec, regc);
}
static void emit_post_push_reg_reg_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb, vtype_kind_t vtypec, int regc, vtype_kind_t vtyped, int regd) {
emit->stack_vtype[emit->stack_size] = vtypea;
emit->stack_vtype[emit->stack_size + 1] = vtypeb;
emit->stack_vtype[emit->stack_size + 2] = vtypec;
emit->stack_vtype[emit->stack_size + 3] = vtyped;
ASM_MOV_REG_TO_LOCAL(rega, emit->stack_start + emit->stack_size);
ASM_MOV_REG_TO_LOCAL(regb, emit->stack_start + emit->stack_size + 1);
ASM_MOV_REG_TO_LOCAL(regc, emit->stack_start + emit->stack_size + 2);
ASM_MOV_REG_TO_LOCAL(regd, emit->stack_start + emit->stack_size + 3);
adjust_stack(emit, 4);
emit_post_push_reg(emit, vtypea, rega);
emit_post_push_reg(emit, vtypeb, regb);
emit_post_push_reg(emit, vtypec, regc);
emit_post_push_reg(emit, vtyped, regd);
}
// vtype of all n_pop objects is VTYPE_PYOBJ
static void emit_get_stack_pointer_to_reg_for_pop(emit_t *emit, int reg_dest, int n_pop) {
need_reg_all(emit);
for (int i = 0; i < n_pop; i++) {
assert(emit->stack_info[emit->stack_size + i].vtype == VTYPE_PYOBJ);
}
ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size - 1, reg_dest);
adjust_stack(emit, -n_pop);
}
// vtype of all n_push objects is VTYPE_PYOBJ
static void emit_get_stack_pointer_to_reg_for_push(emit_t *emit, int reg_dest, int n_push) {
need_reg_all(emit);
for (int i = 0; i < n_push; i++) {
emit->stack_vtype[emit->stack_size + i] = VTYPE_PYOBJ;
emit->stack_info[emit->stack_size + i].vtype = VTYPE_PYOBJ;
}
ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size + n_push - 1, reg_dest);
adjust_stack(emit, n_push);
......@@ -435,6 +454,7 @@ static void emit_call(emit_t *emit, rt_fun_kind_t fun_kind, void *fun) {
}
static void emit_call_with_imm_arg(emit_t *emit, rt_fun_kind_t fun_kind, void *fun, machine_int_t arg_val, int arg_reg) {
need_reg_all(emit);
ASM_MOV_IMM_TO_REG(arg_val, arg_reg);
emit_call(emit, fun_kind, fun);
}
......@@ -442,6 +462,7 @@ static void emit_call_with_imm_arg(emit_t *emit, rt_fun_kind_t fun_kind, void *f
static void emit_native_load_id(emit_t *emit, qstr qstr) {
// check for built-ins
if (strcmp(qstr_str(qstr), "v_int") == 0) {
assert(0);
emit_pre(emit);
//emit_post_push_blank(emit, VTYPE_BUILTIN_V_INT);
......@@ -585,6 +606,7 @@ static void emit_native_load_fast(emit_t *emit, qstr qstr, int local_num) {
if (local_num == 0) {
emit_post_push_reg(emit, vtype, REG_LOCAL_1);
} else {
need_reg_single(emit, REG_RAX);
asm_x64_mov_local_to_r64(emit->as, local_num - 1, REG_RAX);
emit_post_push_reg(emit, vtype, REG_RAX);
}
......@@ -596,6 +618,7 @@ static void emit_native_load_fast(emit_t *emit, qstr qstr, int local_num) {
} else if (local_num == 2) {
emit_post_push_reg(emit, vtype, REG_LOCAL_3);
} else {
need_reg_single(emit, REG_R0);
asm_thumb_mov_reg_local(emit->as, REG_R0, local_num - 1);
emit_post_push_reg(emit, vtype, REG_R0);
}
......@@ -778,7 +801,9 @@ static void emit_native_pop_top(emit_t *emit) {
}
static void emit_native_rot_two(emit_t *emit) {
assert(0);
vtype_kind_t vtype0, vtype1;
emit_pre_pop_reg_reg(emit, &vtype0, REG_TEMP0, &vtype1, REG_TEMP1);
emit_post_push_reg_reg(emit, vtype0, REG_TEMP0, vtype1, REG_TEMP1);
}
static void emit_native_rot_three(emit_t *emit) {
......
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