diff --git a/extra/remu/src/thread.rs b/extra/remu/src/thread.rs
index 5f493a1bef..78cacfa5ef 100644
--- a/extra/remu/src/thread.rs
+++ b/extra/remu/src/thread.rs
@@ -93,6 +93,12 @@ impl<'a> Thread<'a> {
                                 sdst | (1 << (s0 & 0x1f))
                             }
                         }
+                        21 => {
+                            let s0 = s0 as i32;
+                            let ret = s0.abs();
+                            *self.scc = (ret != 0) as u32;
+                            ret as u32
+                        }
                         30 => {
                             let ret = !s0;
                             *self.scc = (ret != 0) as u32;
@@ -1686,6 +1692,7 @@ impl<'a> Thread<'a> {
             107 => self.scalar_reg[code as usize],
             EXEC => self.exec.value,
             NULL_SRC | 128 => 0,
+            253 => *self.scc as u32,
             255 => match self.simm {
                 None => {
                     let val = self.stream[self.pc_offset + 1];
diff --git a/extra/remu/test/hwtest.py b/extra/remu/test/hwtest.py
index 52c019787a..9fe4196275 100644
--- a/extra/remu/test/hwtest.py
+++ b/extra/remu/test/hwtest.py
@@ -152,5 +152,21 @@ class TestHW(unittest.TestCase):
     self.assertEqual(get_output(init_state+"\n"+"v_fmac_f16_e64 v1 -v11 v10"), f16_to_bits(-10.))
     self.assertEqual(get_output(init_state+"\n"+"v_fmac_f16_e64 v1 -v11 -v10"), f16_to_bits(14.))
 
+  def test_s_abs_i32(self):
+    def s_abs_i32(x, y, dst="s10", scc=0):
+      for reg,val in [(dst, y), ("scc", scc)]:
+        self.assertEqual(get_output(f"""
+        s_mov_b32_e32 {dst} {x}
+        s_abs_i32 {dst} {dst}
+        v_mov_b32_e32 v1 {reg}
+        """)[0], val)
+    s_abs_i32(0x00000001, 0x00000001, scc=1)
+    s_abs_i32(0x7fffffff, 0x7fffffff, scc=1)
+    s_abs_i32(0x80000000, 0x80000000, scc=1)
+    s_abs_i32(0x80000001, 0x7fffffff, scc=1)
+    s_abs_i32(0x80000002, 0x7ffffffe, scc=1)
+    s_abs_i32(0xffffffff, 0x00000001, scc=1)
+    s_abs_i32(0, 0, scc=0)
+
 if __name__ == "__main__":
   unittest.main()