| author |  Jacob Young <jacobly@ziglang.org> 2022-12-20 21:31:44-05:00 |
| committer |  Andrew Kelley <andrew@ziglang.org> 2022-12-21 03:04:59-05:00 |
| log | a52dcdd3c5ebd3a1d5a0189ded830dadd253193c |
| tree | 80bd063b2e762914a87bde8a393281ce0864a06a |
| parent | 471f3c470fdeb00596ebd0d045a5b0dab737947d |
CBE: fix bitwise not
Closes #139112 files changed, 18 insertions(+), 2 deletions(-)
src/codegen/c.zig+5-2
| ... | ... | @@ -3591,6 +3591,10 @@ fn airOverflow(f: *Function, inst: Air.Inst.Index, operation: []const u8, info: |
| 3591 | 3591 | } |
| 3592 | 3592 | |
| 3593 | 3593 | fn airNot(f: *Function, inst: Air.Inst.Index) !CValue { |
| 3594 | const inst_ty = f.air.typeOfIndex(inst); | |
| 3595 | if (inst_ty.tag() != .bool) | |
| 3596 | return try airUnBuiltinCall(f, inst, "not", .Bits); | |
| 3597 | ||
| 3594 | 3598 | const ty_op = f.air.instructions.items(.data)[inst].ty_op; |
| 3595 | 3599 | |
| 3596 | 3600 | if (f.liveness.isUnused(inst)) { |
| ... | ... | @@ -3602,11 +3606,10 @@ fn airNot(f: *Function, inst: Air.Inst.Index) !CValue { |
| 3602 | 3606 | try reap(f, inst, &.{ty_op.operand}); |
| 3603 | 3607 | |
| 3604 | 3608 | const writer = f.object.writer(); |
| 3605 | const inst_ty = f.air.typeOfIndex(inst); | |
| 3606 | 3609 | const local = try f.allocLocal(inst, inst_ty); |
| 3607 | 3610 | try f.writeCValue(writer, local, .Other); |
| 3608 | 3611 | try writer.writeAll(" = "); |
| 3609 | try writer.writeByte(if (inst_ty.tag() == .bool) '!' else '~'); | |
| 3612 | try writer.writeByte('!'); | |
| 3610 | 3613 | try f.writeCValue(writer, op, .Other); |
| 3611 | 3614 | try writer.writeAll(";\n"); |
| 3612 | 3615 |
test/behavior/math.zig+13
| ... | ... | @@ -532,6 +532,19 @@ fn testUnsignedNegationWrappingEval(x: u16) !void { |
| 532 | 532 | try expect(neg == maxInt(u16)); |
| 533 | 533 | } |
| 534 | 534 | |
| 535 | test "negation wrapping" { | |
| 536 | if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO | |
| 537 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 538 | ||
| 539 | try expectEqual(@as(u1, 1), negateWrap(u1, 1)); | |
| 540 | } | |
| 541 | ||
| 542 | fn negateWrap(comptime T: type, x: T) T { | |
| 543 | // This is specifically testing a safety-checked add, so | |
| 544 | // special case minInt(T) which would overflow otherwise. | |
| 545 | return if (x == minInt(T)) minInt(T) else ~x + 1; | |
| 546 | } | |
| 547 | ||
| 535 | 548 | test "unsigned 64-bit division" { |
| 536 | 549 | if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO |
| 537 | 550 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO |