From 12a04219880cbe1e6a3fe45d6c8e4581e2420602 Mon Sep 17 00:00:00 2001
From: David Given <dg@cowlark.com>
Date: Sun, 17 Feb 2019 10:09:22 +0100
Subject: [PATCH] Minor improvements to the way types are expanded (should
 avoid embarassing ands with 0xff).

---
 mach/i80/ncg/table | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/mach/i80/ncg/table b/mach/i80/ncg/table
index bfc21334d..9eea4b76a 100644
--- a/mach/i80/ncg/table
+++ b/mach/i80/ncg/table
@@ -1186,24 +1186,23 @@ pat ciu						leaving cuu $1
 pat loc loc cuu $1==$2
 
 pat loc loc cuu $1==2 && $2==4
-with src1or2				yields {const2,0} %1
+   with src1or2
+      yields {const2,0} %1
 
 pat loc loc cuu $1==4 && $1==2
-with src1or2 src1or2			yields %1
+   with src1or2 src1or2
+		yields %1
 
 pat loc loc cuu $1==1 && $2==2
-with reg
-   uses reusing %1, hl_or_de
-   gen move %1,%a			yields %a
-with hl_or_de
-   gen move {const1,0},%1.1		yields %1
+   with reg
+      yields %1
 
 pat loc loc cuu $1==1 && $2==4
-with reg
-   uses reusing %1, hl_or_de
-   gen move %1,%a			yields {const2,0} %a
-with hl_or_de
-   gen move {const1,0},%1.1		yields {const2,0} %1
+   with reg
+      uses reusing %1
+      yields {const2,0} %1
+   with hl_or_de
+      yields {const2,0} %1
 
 pat cuu
 kills ALL
@@ -1260,6 +1259,12 @@ leaving loc $1 loc $2 cal ".cfu" asp 4+$1 lfr 4
 /* Group 9: Logical instructions         */
 /*****************************************/
 
+pat loc and ($1==0xff) && ($2==2)
+   with hl_or_de
+      yields %1.2
+
+pat loc and ($1==0xffff) && ($2==2)
+
 pat and $1==2
    with hl_or_de smallpconst2
       uses areg
@@ -1329,6 +1334,8 @@ pat and !defined($1)
       gen
          Call {label,".and"}
 
+pat loc ior ($1==0)
+
 pat ior $1==2
    with hl_or_de smallpconst2
       uses areg
@@ -1398,6 +1405,8 @@ with dereg
 kills ALL
 gen Call {label,".ior"}
 
+pat loc xor ($1==0)
+
 pat xor $1==2
    with hl_or_de smallpconst2
       uses areg
-- 
2.34.1