From 3d1fb4fac8d4ce47d6e306b33def16ab49445190 Mon Sep 17 00:00:00 2001
From: Pavel Verigo <paul.verigo@gmail.com>
Date: Sun, 3 May 2026 19:03:46 +0200
Subject: [PATCH] stage2-wasm: disable std tests, add failing behavior tests

---
 test/behavior/bitcast.zig | 39 +++++++++++++++++++++++++++++++++++++++
 test/behavior/floatop.zig | 11 +++++++++++
 test/tests.zig            |  2 +-
 3 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/test/behavior/bitcast.zig b/test/behavior/bitcast.zig
index 660ace22803ef0c719029757c4436db3f4e8690f..672ce96d8b345fcc0e5787d9fc9edfeafc48e61d 100644
--- a/test/behavior/bitcast.zig
+++ b/test/behavior/bitcast.zig
@@ -552,3 +552,42 @@ test "@bitCast of extern struct containing pointer" {
     try S.doTheTest();
     try comptime S.doTheTest();
 }
+
+test "@bitCast of extern struct to float" {
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+
+    const S = struct {
+        const S = extern struct {
+            x: u16,
+            y: u16,
+        };
+        fn doTheTest() !void {
+            var s: S = .{ .x = 0, .y = 0 };
+            _ = &s;
+            const a: f32 = @bitCast(s);
+            try expect(a == 0);
+        }
+    };
+
+    try S.doTheTest();
+    try comptime S.doTheTest();
+}
+
+test "@bitCast of float to extern struct" {
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+
+    const S = struct {
+        const S = extern struct {
+            x: u32,
+        };
+        fn doTheTest() !void {
+            var a: f32 = -0.0;
+            _ = &a;
+            const s: S = @bitCast(a);
+            try expect(s.x == 0x80000000);
+        }
+    };
+
+    try S.doTheTest();
+    try comptime S.doTheTest();
+}
diff --git a/test/behavior/floatop.zig b/test/behavior/floatop.zig
index 38097b69d8f67fab3147f6f25b33a398f11c5387..44e6abe4a2fbb8fcdba707ea5cc211ec02fbcb6f 100644
--- a/test/behavior/floatop.zig
+++ b/test/behavior/floatop.zig
@@ -1539,6 +1539,17 @@ fn testNeg(comptime T: type) !void {
     };
 }
 
+test "negate f80" {
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+
+    var f: f80 = 0.0;
+    const a: u80 = @bitCast(f);
+    try expect(a == 0);
+    f = -f;
+    const b: u80 = @bitCast(f);
+    try expect(b == 0x8000_00000000_00000000);
+}
+
 test "eval @setFloatMode at compile-time" {
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
 
diff --git a/test/tests.zig b/test/tests.zig
index 28cb147cf88f9aca5951e1a86b6d363e2d26b27b..e5d43aa9101cc5d08cd126db49e22c02fc294462 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -1496,7 +1496,7 @@ const module_test_targets = blk: {
                 .os_tag = .wasi,
                 .abi = .none,
             },
-            .skip_modules = &.{"compiler-rt"},
+            .skip_modules = &.{ "compiler-rt", "std" },
             .use_llvm = false,
             .use_lld = false,
         },
-- 
2.54.0