From bf6b5c74a6f1927174091c73aa51401895ef92f0 Mon Sep 17 00:00:00 2001
From: Andrew Stubbs <ams@codesourcery.com>
Date: Thu, 22 Sep 2022 12:48:30 +0100
Subject: amdgcn: Add vector integer negate insn

Another example of the vectorizer needing explicit insns where the scalar
expander just works.

gcc/ChangeLog:

	* config/gcn/gcn-valu.md (neg<mode>2): New define_expand.
---
 gcc/config/gcn/gcn-valu.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'gcc')

diff --git a/gcc/config/gcn/gcn-valu.md b/gcc/config/gcn/gcn-valu.md
index f708e58..00c0e3b 100644
--- a/gcc/config/gcn/gcn-valu.md
+++ b/gcc/config/gcn/gcn-valu.md
@@ -2391,6 +2391,19 @@
    (set_attr "length" "8,8")])
 
 ;; }}}
+;; {{{ Int unops
+
+(define_expand "neg<mode>2"
+  [(match_operand:V_INT 0 "register_operand")
+   (match_operand:V_INT 1 "register_operand")]
+  ""
+  {
+    emit_insn (gen_sub<mode>3 (operands[0], gcn_vec_constant (<MODE>mode, 0),
+			       operands[1]));
+    DONE;
+  })
+
+;; }}}
 ;; {{{ FP binops - special cases
 
 ; GCN does not directly provide a DFmode subtract instruction, so we do it by
-- 
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