authorgravatar for joachim.schmidt557@outlook.comJoachim Schmidt <joachim.schmidt557@outlook.com> 2022-03-17 09:57:10+01:00
committergravatar for joachim.schmidt557@outlook.comJoachim Schmidt <joachim.schmidt557@outlook.com> 2022-03-18 12:12:14+01:00
log3ecba7d7a2f527d4f579a1156e26cd2f0c14c2a0
tree733f17f16f53cb5721bbd1f48628b72f05759ca9
parentf3f5a5d05b7056aceb408b701613242d053019ab
signaturelock-open Commit is signed but in an unrecognized format.

stage2 ARM: implement slice_elem_ptr, ptr_elem_ptr

6 files changed, 60 insertions(+), 33 deletions(-)

src/arch/arm/CodeGen.zig+60-28
......@@ -1358,24 +1358,28 @@ fn airWrapErrUnionErr(self: *Self, inst: Air.Inst.Index) !void {
13581358 return self.finishAir(inst, result, .{ ty_op.operand, .none, .none });
13591359}
13601360
1361fn slicePtr(self: *Self, mcv: MCValue) !MCValue {
1362 switch (mcv) {
1363 .dead, .unreach => unreachable,
1364 .register => unreachable, // a slice doesn't fit in one register
1365 .stack_argument_offset => |off| {
1366 return MCValue{ .stack_argument_offset = off + 4 };
1367 },
1368 .stack_offset => |off| {
1369 return MCValue{ .stack_offset = off + 4 };
1370 },
1371 .memory => |addr| {
1372 return MCValue{ .memory = addr };
1373 },
1374 else => return self.fail("TODO implement slice_ptr for {}", .{mcv}),
1375 }
1376}
1377
13611378fn airSlicePtr(self: *Self, inst: Air.Inst.Index) !void {
13621379 const ty_op = self.air.instructions.items(.data)[inst].ty_op;
13631380 const result: MCValue = if (self.liveness.isUnused(inst)) .dead else result: {
13641381 const mcv = try self.resolveInst(ty_op.operand);
1365 switch (mcv) {
1366 .dead, .unreach => unreachable,
1367 .register => unreachable, // a slice doesn't fit in one register
1368 .stack_argument_offset => |off| {
1369 break :result MCValue{ .stack_argument_offset = off + 4 };
1370 },
1371 .stack_offset => |off| {
1372 break :result MCValue{ .stack_offset = off + 4 };
1373 },
1374 .memory => |addr| {
1375 break :result MCValue{ .memory = addr };
1376 },
1377 else => return self.fail("TODO implement slice_ptr for {}", .{mcv}),
1378 }
1382 break :result try self.slicePtr(mcv);
13791383 };
13801384 return self.finishAir(inst, result, .{ ty_op.operand, .none, .none });
13811385}
......@@ -1409,7 +1413,7 @@ fn airPtrSliceLenPtr(self: *Self, inst: Air.Inst.Index) !void {
14091413 switch (mcv) {
14101414 .dead, .unreach => unreachable,
14111415 .ptr_stack_offset => |off| {
1412 break :result MCValue{ .ptr_stack_offset = off + 4 };
1416 break :result MCValue{ .ptr_stack_offset = off };
14131417 },
14141418 else => return self.fail("TODO implement ptr_slice_len_ptr for {}", .{mcv}),
14151419 }
......@@ -1424,7 +1428,7 @@ fn airPtrSlicePtrPtr(self: *Self, inst: Air.Inst.Index) !void {
14241428 switch (mcv) {
14251429 .dead, .unreach => unreachable,
14261430 .ptr_stack_offset => |off| {
1427 break :result MCValue{ .ptr_stack_offset = off };
1431 break :result MCValue{ .ptr_stack_offset = off + 4 };
14281432 },
14291433 else => return self.fail("TODO implement ptr_slice_ptr_ptr for {}", .{mcv}),
14301434 }
......@@ -1455,15 +1459,17 @@ fn airSliceElemVal(self: *Self, inst: Air.Inst.Index) !void {
14551459 if (index_is_register) self.register_manager.freezeRegs(&.{index_mcv.register});
14561460 defer if (index_is_register) self.register_manager.unfreezeRegs(&.{index_mcv.register});
14571461
1458 const base_mcv: MCValue = switch (slice_mcv) {
1459 .stack_offset => |off| .{ .register = try self.copyToTmpRegister(slice_ptr_field_type, .{ .stack_offset = off + 4 }) },
1460 .stack_argument_offset => |off| .{ .register = try self.copyToTmpRegister(slice_ptr_field_type, .{ .stack_argument_offset = off + 4 }) },
1461 else => return self.fail("TODO slice_elem_val when slice is {}", .{slice_mcv}),
1462 };
1463 self.register_manager.freezeRegs(&.{base_mcv.register});
1462 const base_mcv = try self.slicePtr(slice_mcv);
14641463
14651464 switch (elem_size) {
14661465 1, 4 => {
1466 const base_reg = switch (base_mcv) {
1467 .register => |r| r,
1468 else => try self.copyToTmpRegister(slice_ptr_field_type, base_mcv),
1469 };
1470 self.register_manager.freezeRegs(&.{base_reg});
1471 defer self.register_manager.unfreezeRegs(&.{base_reg});
1472
14671473 const dst_reg = try self.register_manager.allocReg(inst);
14681474 const dst_mcv = MCValue{ .register = dst_reg };
14691475 self.register_manager.freezeRegs(&.{dst_reg});
......@@ -1491,13 +1497,11 @@ fn airSliceElemVal(self: *Self, inst: Air.Inst.Index) !void {
14911497 .tag = tag,
14921498 .data = .{ .rr_offset = .{
14931499 .rt = dst_reg,
1494 .rn = base_mcv.register,
1500 .rn = base_reg,
14951501 .offset = .{ .offset = Instruction.Offset.reg(index_reg, .{ .lsl = shift }) },
14961502 } },
14971503 });
14981504
1499 self.register_manager.unfreezeRegs(&.{base_mcv.register});
1500
15011505 break :result dst_mcv;
15021506 },
15031507 else => {
......@@ -1515,7 +1519,16 @@ fn airSliceElemVal(self: *Self, inst: Air.Inst.Index) !void {
15151519fn airSliceElemPtr(self: *Self, inst: Air.Inst.Index) !void {
15161520 const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
15171521 const extra = self.air.extraData(Air.Bin, ty_pl.payload).data;
1518 const result: MCValue = if (self.liveness.isUnused(inst)) .dead else return self.fail("TODO implement slice_elem_ptr for {}", .{self.target.cpu.arch});
1522 const result: MCValue = if (self.liveness.isUnused(inst)) .dead else result: {
1523 const slice_mcv = try self.resolveInst(extra.lhs);
1524 const index_mcv = try self.resolveInst(extra.rhs);
1525 const base_mcv = try self.slicePtr(slice_mcv);
1526
1527 const slice_ty = self.air.typeOf(extra.lhs);
1528
1529 const addr = try self.binOp(.ptr_add, null, base_mcv, index_mcv, slice_ty, Type.usize);
1530 break :result addr;
1531 };
15191532 return self.finishAir(inst, result, .{ extra.lhs, extra.rhs, .none });
15201533}
15211534
......@@ -1535,7 +1548,15 @@ fn airPtrElemVal(self: *Self, inst: Air.Inst.Index) !void {
15351548fn airPtrElemPtr(self: *Self, inst: Air.Inst.Index) !void {
15361549 const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
15371550 const extra = self.air.extraData(Air.Bin, ty_pl.payload).data;
1538 const result: MCValue = if (self.liveness.isUnused(inst)) .dead else return self.fail("TODO implement ptr_elem_ptr for {}", .{self.target.cpu.arch});
1551 const result: MCValue = if (self.liveness.isUnused(inst)) .dead else result: {
1552 const ptr_mcv = try self.resolveInst(extra.lhs);
1553 const index_mcv = try self.resolveInst(extra.rhs);
1554
1555 const ptr_ty = self.air.typeOf(extra.lhs);
1556
1557 const addr = try self.binOp(.ptr_add, null, ptr_mcv, index_mcv, ptr_ty, Type.usize);
1558 break :result addr;
1559 };
15391560 return self.finishAir(inst, result, .{ extra.lhs, extra.rhs, .none });
15401561}
15411562
......@@ -1760,7 +1781,7 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
17601781 try self.genStrRegister(value_reg, addr_reg, value_ty);
17611782 },
17621783 else => {
1763 if (value_ty.abiSize(self.target.*) <= 4) {
1784 if (elem_size <= 4) {
17641785 const tmp_reg = try self.register_manager.allocReg(null);
17651786 self.register_manager.freezeRegs(&.{tmp_reg});
17661787 defer self.register_manager.unfreezeRegs(&.{tmp_reg});
......@@ -1784,6 +1805,17 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
17841805 try self.genSetReg(ptr_ty, src_reg, .{ .ptr_stack_offset = off });
17851806 },
17861807 .memory => |addr| try self.genSetReg(Type.usize, src_reg, .{ .immediate = @intCast(u32, addr) }),
1808 .stack_argument_offset => |unadjusted_off| {
1809 const adj_off = unadjusted_off + elem_size;
1810
1811 _ = try self.addInst(.{
1812 .tag = .ldr_ptr_stack_argument,
1813 .data = .{ .r_stack_offset = .{
1814 .rt = src_reg,
1815 .stack_offset = adj_off,
1816 } },
1817 });
1818 },
17871819 else => return self.fail("TODO store {} to register", .{value}),
17881820 }
17891821
test/behavior/align.zig-1
......@@ -115,7 +115,6 @@ fn addUnalignedSlice(a: []align(1) const u32, b: []align(1) const u32) u32 {
115115test "specifying alignment allows pointer cast" {
116116 if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
117117 if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
118 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
119118
120119 try testBytesAlign(0x33);
121120}
test/behavior/array.zig-1
......@@ -272,7 +272,6 @@ test "read/write through global variable array of struct fields initialized via
272272
273273test "implicit cast single-item pointer" {
274274 if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
275 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
276275
277276 try testImplicitCastSingleItemPtr();
278277 comptime try testImplicitCastSingleItemPtr();
test/behavior/basic.zig-1
......@@ -636,7 +636,6 @@ var global_ptr = &gdt[0];
636636
637637test "global constant is loaded with a runtime-known index" {
638638 if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
639 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
640639
641640 const S = struct {
642641 fn doTheTest() !void {
test/behavior/optional.zig-1
......@@ -275,7 +275,6 @@ test "0-bit child type coerced to optional" {
275275 if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
276276 if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
277277 if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
278 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
279278
280279 const S = struct {
281280 fn doTheTest() !void {
test/behavior/struct.zig-1
......@@ -1289,7 +1289,6 @@ test "initialize struct with empty literal" {
12891289
12901290test "loading a struct pointer perfoms a copy" {
12911291 if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
1292 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
12931292
12941293 const S = struct {
12951294 a: i32,