From 5c104cf9813516b18d421e8a420dad767384e4bf Mon Sep 17 00:00:00 2001
From: Spydr <58859306+Spydr06@users.noreply.github.com>
Date: Sun, 12 Jun 2022 08:42:39 +0200
Subject: [PATCH] native: implement  `neg()` for arm64 (#14745)

---
 vlib/v/gen/native/arm64.v | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/vlib/v/gen/native/arm64.v b/vlib/v/gen/native/arm64.v
index 0a1e11bb5f..d90814db48 100644
--- a/vlib/v/gen/native/arm64.v
+++ b/vlib/v/gen/native/arm64.v
@@ -77,6 +77,19 @@ fn (mut g Gen) mov_arm(reg Arm64Register, val u64) {
 	*/
 }
 
+fn (mut g Gen) neg_arm(r Arm64Register) {
+	g.neg_regs_arm(r, r)
+}
+
+fn (mut g Gen) neg_regs_arm(a Arm64Register, b Arm64Register) {
+	if int(a) < 0x0f && int(b) < 0x0f {
+		g.write32(0xe2600000 | int(a) << 16 | int(b) << 12)
+		g.println('neg $a, $b')
+	} else {
+		g.n_error('unhandled neg $a, $b')
+	}
+}
+
 pub fn (mut g Gen) fn_decl_arm64(node ast.FnDecl) {
 	g.gen_arm64_helloworld()
 	// TODO