diff --git a/riscv/insns/pm2wsub_h.h b/riscv/insns/pm2wsub_h.h
index 903cbe30..e960c404 100644
--- a/riscv/insns/pm2wsub_h.h
+++ b/riscv/insns/pm2wsub_h.h
@@ -1,7 +1,7 @@
 require_rv32;
 P_WIDEN_REDUCTION_LOOP(32, 16, false, false, {
   if (j & 1)
-    p_res += p_rs1 * p_rs2;
-  else
     p_res -= p_rs1 * p_rs2;
+  else
+    p_res += p_rs1 * p_rs2;
 })
\ No newline at end of file
diff --git a/riscv/insns/pm2wsuba_h.h b/riscv/insns/pm2wsuba_h.h
index 600b77e2..dae5c0a7 100644
--- a/riscv/insns/pm2wsuba_h.h
+++ b/riscv/insns/pm2wsuba_h.h
@@ -1,7 +1,7 @@
 require_rv32;
 P_WIDEN_REDUCTION_LOOP(32, 16, true, false, {
   if (j & 1)
-    p_res += p_rs1 * p_rs2;
-  else
     p_res -= p_rs1 * p_rs2;
+  else
+    p_res += p_rs1 * p_rs2;
 })
\ No newline at end of file