Make use of UDIV where possible

Detail:
  s/Draw - Make DivRem2 macro just be a wrapper around DivRem rather than a clone of it, allowing UDIV to be used
Admin:
  Tested on Cortex-A15


Version 1.22. Tagged as 'Draw-1_22'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "1.21"
-Module_Version          SETA    121
+Module_MajorVersion     SETS    "1.22"
+Module_Version          SETA    122
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "05 Aug 2011"
-Module_ApplicationDate  SETS    "05-Aug-11"
+Module_Date             SETS    "08 May 2016"
+Module_ApplicationDate  SETS    "08-May-16"
 Module_ComponentName    SETS    "Draw"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Video/Render/Draw"
-Module_FullVersion      SETS    "1.21"
-Module_HelpVersion      SETS    "1.21 (05 Aug 2011)"
+Module_FullVersion      SETS    "1.22"
+Module_HelpVersion      SETS    "1.22 (08 May 2016)"
                         END

VersionNum

-/* (1.21)
+/* (1.22)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        1.21
+#define Module_MajorVersion_CMHG        1.22
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                05 Aug 2011
+#define Module_Date_CMHG                08 May 2016
 
-#define Module_MajorVersion             "1.21"
-#define Module_Version                  121
+#define Module_MajorVersion             "1.22"
+#define Module_Version                  122
 #define Module_MinorVersion             ""
-#define Module_Date                     "05 Aug 2011"
+#define Module_Date                     "08 May 2016"
 
-#define Module_ApplicationDate          "05-Aug-11"
+#define Module_ApplicationDate          "08-May-16"
 
 #define Module_ComponentName            "Draw"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Video/Render/Draw"
 
-#define Module_FullVersion              "1.21"
-#define Module_HelpVersion              "1.21 (05 Aug 2011)"
-#define Module_LibraryVersionInfo       "1:21"
+#define Module_FullVersion              "1.22"
+#define Module_HelpVersion              "1.22 (08 May 2016)"
+#define Module_LibraryVersionInfo       "1:22"

s/Draw

@@ -150,26 +150,13 @@ Module_BaseAddr
 checkdivides    SETL    {FALSE} :LAND: BeingDeveloped
 
         MACRO
-$label  DivRem2 $rc, $ra, $rb, $rtemp
+$label  DivRem2 $rc, $ra, $rb, $rtemp, $norem
 $label
         [       checkdivides
         TEQ     $rb,#0
         SWIEQ   OS_BreakPt
         ]
-        MOV     $rtemp, $rb
-        CMP     $rtemp, $ra, LSR #1
-01
-        MOVLS   $rtemp, $rtemp, LSL #1
-        CMPLS   $rtemp, $ra, LSR #1
-        BLS     %BT01
-        MOV     $rc, #0
-02
-        CMP     $ra, $rtemp
-        SUBCS   $ra, $ra, $rtemp
-        ADC     $rc, $rc, $rc
-        MOV     $rtemp, $rtemp, LSR #1
-        CMP     $rtemp, $rb
-        BCS     %BT02
+        DivRem  $rc, $ra, $rb, $rtemp, $norem
         MEND
 
 ;----------------------------------------------------------------------------