From f82e3e1629af4dc751a80a3a4b04ff1b43725c24 Mon Sep 17 00:00:00 2001
From: Kbz-8 <kbz_8.code@proton.me>
Date: Fri, 19 Jun 2026 01:55:52 +0200
Subject: [PATCH] fixing opFwidth

---
 src/opcodes.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/opcodes.zig b/src/opcodes.zig
index 0ab9636..337a819 100644
--- a/src/opcodes.zig
+++ b/src/opcodes.zig
@@ -4494,7 +4494,7 @@ fn opFwidth(allocator: std.mem.Allocator, _: SpvWord, rt: *Runtime) RuntimeError
                 const dx: FloatT = if (derivative) |d|
                     try Value.readLane(.Float, bits, &d.dx, lane_index)
                 else
-                    0;
+                    1;
                 const dy: FloatT = if (derivative) |d|
                     try Value.readLane(.Float, bits, &d.dy, lane_index)
                 else