From 1fb8df6c3e0cf58ed9b31d3aca524c6e3f136d43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mos=C3=A8=20Giordano?=
 <765740+giordano@users.noreply.github.com>
Date: Thu, 21 Nov 2024 12:21:25 -0500
Subject: [PATCH] Fix `unsafe_trunc` test for `NaN16` (#56630)

The return value of the LLVM instruction `fptosi`
(https://llvm.org/docs/LangRef.html#fptosi-to-instruction) does not
guarantee that the truncation of `NaN` is 0, so we relax the test to
only check that the output has the expected type.

Fix #56582.
---
 test/float16.jl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/float16.jl b/test/float16.jl
index 10fb6b37db16d..4ff7cc663d07b 100644
--- a/test/float16.jl
+++ b/test/float16.jl
@@ -79,7 +79,8 @@ end
     @test unsafe_trunc(Int16, Float16(3)) === Int16(3)
     @test unsafe_trunc(UInt128, Float16(3)) === UInt128(3)
     @test unsafe_trunc(Int128, Float16(3)) === Int128(3)
-    @test unsafe_trunc(Int16, NaN16) === Int16(0)  #18771
+    # `unsafe_trunc` of `NaN` can be any value, see #56582
+    @test unsafe_trunc(Int16, NaN16) isa Int16 # #18771
 end
 @testset "fma and muladd" begin
     @test fma(Float16(0.1),Float16(0.9),Float16(0.5)) ≈ fma(0.1,0.9,0.5)