From d6b436a8151a23fe4e7bca92197f38373bcb4156 Mon Sep 17 00:00:00 2001
From: qazal <77887910+Qazalin@users.noreply.github.com>
Date: Mon, 28 Apr 2025 10:46:42 +0300
Subject: [PATCH] remu bugfix with -0.0 negation (#10082)

---
 extra/remu/src/helpers.rs | 3 ++-
 extra/remu/src/thread.rs  | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/extra/remu/src/helpers.rs b/extra/remu/src/helpers.rs
index 3d7f03bbcb..0534ea217e 100644
--- a/extra/remu/src/helpers.rs
+++ b/extra/remu/src/helpers.rs
@@ -56,7 +56,7 @@ where
     fn negate(&self, pos: usize, modifier: usize) -> T {
         match (modifier >> pos) & 1 {
             1 => match self.is_zero() {
-                true => *self,
+                true => T::zero(),
                 false => -*self,
             },
             _ => *self,
@@ -123,6 +123,7 @@ mod tests {
         assert_eq!(0.3_f32.negate(0, 0b110), 0.3_f32);
         assert_eq!(0.3_f32.negate(1, 0b010), -0.3_f32);
         assert_eq!(0.0_f32.negate(0, 0b001).to_bits(), 0);
+        assert_eq!((-0.0_f32).negate(0, 0b001).to_bits(), 0);
     }
 
     #[test]
diff --git a/extra/remu/src/thread.rs b/extra/remu/src/thread.rs
index eb716b0558..34e9009530 100644
--- a/extra/remu/src/thread.rs
+++ b/extra/remu/src/thread.rs
@@ -3019,7 +3019,7 @@ mod test_vop3 {
 
     #[test]
     fn test_v_cndmask_b32_e64_neg() {
-        [[0.0f32, 0.0], [1.0f32, -1.0], [-1.0f32, 1.0]].iter().for_each(|[input, ret]| {
+        [[0.0f32, 0.0], [-0.0f32, 0.0], [1.0f32, -1.0], [-1.0f32, 1.0]].iter().for_each(|[input, ret]| {
             let mut thread = _helper_test_thread();
             thread.scalar_reg[0] = false as u32;
             thread.vec_reg[3] = input.to_bits();