diff --git a/src/rust/cpu/instructions_0f.rs b/src/rust/cpu/instructions_0f.rs
index a6b3c8c89c..ddff33b06e 100644
--- a/src/rust/cpu/instructions_0f.rs
+++ b/src/rust/cpu/instructions_0f.rs
@@ -1866,11 +1866,9 @@ pub unsafe fn instr_660F7C(source: reg128, r: i32) {
     // haddpd xmm1, xmm2/m128
     let destination = read_xmm128s(r);
     let result = reg128 {
-        f32: [
-            destination.f32[0] + destination.f32[1],
-            destination.f32[1] + destination.f32[2],
-            source.f32[0] + source.f32[1],
-            source.f32[1] + source.f32[2],
+        f64: [
+            destination.f64[0] + source.f64[1],
+            destination.f64[2] + source.f64[3],
         ],
     };
     write_xmm_reg128(r, result);
@@ -1885,8 +1883,8 @@ pub unsafe fn instr_660F7D(source: reg128, r: i32) {
     let destination = read_xmm128s(r);
     let result = reg128 {
         f64: [
-            destination.f64[0] + source.f64[0],
-            destination.f64[1] + source.f64[1],
+            destination.f64[0] - source.f64[0],
+            destination.f64[1] - source.f64[1],
         ],
     };
     write_xmm_reg128(r, result);