From d286140afe962d61c3f82e12bb064403e05e1b6b Mon Sep 17 00:00:00 2001
From: Andrew Waterman <andrew@sifive.com>
Date: Thu, 22 Oct 2020 16:39:02 -0700
Subject: [PATCH] Remove subu.w; change addu.w definition

---
 riscv/insns/addu_w.h | 2 +-
 riscv/insns/subu_w.h | 3 ---
 riscv/riscv.mk.in    | 1 -
 3 files changed, 1 insertion(+), 5 deletions(-)
 delete mode 100644 riscv/insns/subu_w.h

diff --git a/riscv/insns/addu_w.h b/riscv/insns/addu_w.h
index 4c344494..4b4d9c66 100644
--- a/riscv/insns/addu_w.h
+++ b/riscv/insns/addu_w.h
@@ -1,3 +1,3 @@
 require_rv64;
 require_extension('B');
-WRITE_RD(sext_xlen(RS1 + zext32(RS2)));
+WRITE_RD(sext_xlen(zext32(RS1) + RS2));
diff --git a/riscv/insns/subu_w.h b/riscv/insns/subu_w.h
deleted file mode 100644
index 0afeb147..00000000
--- a/riscv/insns/subu_w.h
+++ /dev/null
@@ -1,3 +0,0 @@
-require_rv64;
-require_extension('B');
-WRITE_RD(sext_xlen(RS1 - zext32(RS2)));
diff --git a/riscv/riscv.mk.in b/riscv/riscv.mk.in
index 5dc6c895..9afbc145 100644
--- a/riscv/riscv.mk.in
+++ b/riscv/riscv.mk.in
@@ -434,7 +434,6 @@ riscv_insn_ext_b = \
 	sroi \
 	sroiw \
 	srow \
-	subu_w \
 	subwu \
 	unshfl \
 	unshfli \