motiejus/zig

commit 2583a39fb6f85fa65caba04f202c1654a5e8f3f6 (tree)
parent cb5a6be41ae0efc30d0b59a41b0763db966e5bf4
Author: r00ster91 <r00ster91@proton.me>
Date:   Sun,  2 Jul 2023 10:01:18 -0400

behavior: test @bitCast of packed struct of bools

This seems to have resolved itself now.
Tested on x86_64 using debug optimize mode.

Closes #9851

Diffstat:
M
test/behavior/bitcast.zig
 | 
44
++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 44 insertions(+), 0 deletions(-)
diff --git a/test/behavior/bitcast.zig b/test/behavior/bitcast.zig
@@ -459,3 +459,47 @@ test "bitcast nan float does modify signaling bit" {
     try expectEqual(math.nan_u128, @as(u128, @bitCast(snan_f128_var)));
     try expectEqual(math.nan_u128, bitCastWrapper128(snan_f128_var));
 }
+
+test "@bitCast of packed struct of bools all true" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO
+
+    const P = packed struct {
+        b0: bool,
+        b1: bool,
+        b2: bool,
+        b3: bool,
+    };
+    var p = std.mem.zeroes(P);
+    p.b0 = true;
+    p.b1 = true;
+    p.b2 = true;
+    p.b3 = true;
+    try expect(@as(u8, @as(u4, @bitCast(p))) == 15);
+}
+
+test "@bitCast of packed struct of bools all false" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO
+
+    const P = packed struct {
+        b0: bool,
+        b1: bool,
+        b2: bool,
+        b3: bool,
+    };
+    var p = std.mem.zeroes(P);
+    p.b0 = false;
+    p.b1 = false;
+    p.b2 = false;
+    p.b3 = false;
+    try expect(@as(u8, @as(u4, @bitCast(p))) == 0);
+}