From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/metag/lib/cmpdi2.S | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 arch/metag/lib/cmpdi2.S

(limited to 'arch/metag/lib/cmpdi2.S')

diff --git a/arch/metag/lib/cmpdi2.S b/arch/metag/lib/cmpdi2.S
new file mode 100644
index 00000000..9c5c663c
--- /dev/null
+++ b/arch/metag/lib/cmpdi2.S
@@ -0,0 +1,32 @@
+! Copyright (C) 2012 by Imagination Technologies Ltd.
+!
+! 64-bit signed compare routine.
+!
+
+	.text
+	.global ___cmpdi2
+	.type   ___cmpdi2,function
+
+!         low    high
+! s64 a  (D0Ar2, D1Ar1)
+! s64 b  (D0Ar4, D1Ar3)
+___cmpdi2:
+	! start at 1 (equal) and conditionally increment or decrement
+	MOV	D0Re0,#1
+
+	! high words differ?
+	CMP	D1Ar1,D1Ar3
+	BNE	$Lhigh_differ
+
+	! unsigned compare low words
+	CMP	D0Ar2,D0Ar4
+	SUBLO	D0Re0,D0Re0,#1
+	ADDHI	D0Re0,D0Re0,#1
+	MOV	PC,D1RtP
+
+$Lhigh_differ:
+	! signed compare high words
+	SUBLT	D0Re0,D0Re0,#1
+	ADDGT	D0Re0,D0Re0,#1
+	MOV	PC,D1RtP
+	.size ___cmpdi2,.-___cmpdi2
-- 
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