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UAssembly.a
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UAssembly.a
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;Photoshop version 1.0.1, file: UAssembly.a
; Computer History Museum, www.computerhistory.org
; This material is (C)Copyright 1990 Adobe Systems Inc.
; It may not be distributed to third parties.
; It is licensed for non-commercial use according to
; www.computerhistory.org/softwarelicense/photoshop/
INCLUDE 'Traps.a'
; **********************************************************************
SEG 'ARes'
DoSetBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoSetBytes (dataPtr: Ptr;
; count: LONGINT;
; value: INTEGER);
; Parameter Offsets
@dataPtr EQU 14
@count EQU 10
@value EQU 8
; Size of parameters
@params EQU 10
; Unload parameters
LINK A6,#0
MOVE.L @dataPtr(A6),A0
CLR.L D0
MOVE.W @value(A6),D0
AND.W #$FF,D0
MOVE.W D0,D1
LSL.W #8,D1
OR.W D1,D0
MOVE.L D0,D1
SWAP D1
OR.L D1,D0
MOVE.L @count(A6),D1
SUB.L #1,D1
; If count < 32 just do final loop
CMP.L #31,D1
BLT.S @2
; Set bytes until at long word boundary
@0 MOVE.L A0,D2
AND.L #3,D2
BEQ.S @1
MOVE.B D0,(A0)+
SUB.L #1,D1
BRA.S @0
; Set until fewer than 32 bytes left
@1 CMP.L #31,D1
BLT.S @2
SUB.L #32,D1
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
MOVE.L D0,(A0)+
BRA.S @1
; Set remaining bytes
@2 TST.W D1
BMI.S @4
@3 MOVE.B D0,(A0)+
DBF D1,@3
; Clean up and exit
@4 UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoMapBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoMapBytes (dataPtr: Ptr;
; count: LONGINT;
; map: TLookUpTable);
; Parameter Offsets
@dataPtr EQU 16
@count EQU 12
@map EQU 8
; Size of parameters
@params EQU 12
; Unload parameters
LINK A6,#0
MOVE.L @dataPtr(A6),A0
MOVE.L @map(A6),A1
MOVE.L @count(A6),D0
; Map bytes until fewer than 8 bytes left
CLR.W D1
@1 CMP.L #8,D0
BLT.S @2
SUB.L #8,D0
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
BRA.S @1
; Map remaining bytes
@2 TST.L D0
BEQ.S @3
SUB.L #1,D0
MOVE.B (A0),D1
MOVE.B (A1,D1.W),(A0)+
BRA.S @2
; Clean up and exit
@3 UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoHistBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoHistBytes (dataPtr: Ptr;
; maskPtr: Ptr;
; count: LONGINT;
; VAR hist: THistogram);
; Parameter Offsets
@dataPtr EQU 20
@maskPtr EQU 16
@count EQU 12
@hist EQU 8
; Size of parameters
@params EQU 16
; Save registers
LINK A6,#0
MOVEM.L A2,-(SP)
; Unload parameters
MOVE.L @count(A6),D0
BEQ.S @exit
MOVE.L @dataPtr(A6),A0
MOVE.L @hist(A6),A1
MOVE.L @maskPtr(A6),A2
MOVE.L A2,D1
BNE.S @2
; Compute histogram, without mask
@1 CLR.W D1
MOVE.B (A0)+,D1
LSL.W #2,D1
ADD.L #1,(A1,D1.W)
SUB.L #1,D0
BNE.S @1
BRA.S @exit
; Compute histogram, with mask
@2 CLR.W D1
MOVE.B (A0)+,D1
MOVE.B (A2)+,D2
BPL.S @3
LSL.W #2,D1
ADD.L #1,(A1,D1.W)
@3 SUB.L #1,D0
BNE.S @2
; Clean up and exit
@exit MOVEM.L (SP)+,A2
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoSwapBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoSwapBytes (data1: Ptr;
; data2: Ptr;
; count: LONGINT);
; Parameter Offsets
@data1 EQU 16
@data2 EQU 12
@count EQU 8
; Size of parameters
@params EQU 12
; Unload parameters
LINK A6,#0
MOVE.L @data1(A6),A0
MOVE.L @data2(A6),A1
MOVE.L @count(A6),D0
; Swap the bytes
@1 MOVE.B (A0),D1
MOVE.B (A1),(A0)+
MOVE.B D1,(A1)+
SUB.L #1,D0
BNE.S @1
; Clean up and exit
@4 UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoMaxBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoMaxBytes (data1: Ptr;
; data2: Ptr;
; data3: Ptr;
; count: LONGINT);
; Parameter Offsets
@data1 EQU 20
@data2 EQU 16
@data3 EQU 12
@count EQU 8
; Size of parameters
@params EQU 16
; Unload parameters
LINK A6,#0
MOVE.L A2,-(SP)
MOVE.L @data1(A6),A0
MOVE.L @data2(A6),A1
MOVE.L @data3(A6),A2
MOVE.L @count(A6),D0
BLE.S @3
; Compute the maximums
@1 MOVE.B (A0)+,D1
MOVE.B (A1)+,D2
CMP.B D1,D2
BHI.S @2
MOVE.B D1,(A2)+
SUB.L #1,D0
BNE.S @1
BRA.S @3
@2 MOVE.B D2,(A2)+
SUB.L #1,D0
BNE.S @1
; Clean up and exit
@3 MOVE.L (SP)+,A2
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoMinBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoMinBytes (data1: Ptr;
; data2: Ptr;
; data3: Ptr;
; count: LONGINT);
; Parameter Offsets
@data1 EQU 20
@data2 EQU 16
@data3 EQU 12
@count EQU 8
; Size of parameters
@params EQU 16
; Unload parameters
LINK A6,#0
MOVE.L A2,-(SP)
MOVE.L @data1(A6),A0
MOVE.L @data2(A6),A1
MOVE.L @data3(A6),A2
MOVE.L @count(A6),D0
BLE.S @3
; Compute the minimums
@1 MOVE.B (A0)+,D1
MOVE.B (A1)+,D2
CMP.B D1,D2
BLO.S @2
MOVE.B D1,(A2)+
SUB.L #1,D0
BNE.S @1
BRA.S @3
@2 MOVE.B D2,(A2)+
SUB.L #1,D0
BNE.S @1
; Clean up and exit
@3 MOVE.L (SP)+,A2
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
EqualBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; FUNCTION EqualBytes (data1: Ptr;
; data2: Ptr;
; count: INTEGER): BOOLEAN;
;
; Parameter Offsets
@result EQU 18
@data1 EQU 14
@data2 EQU 10
@count EQU 8
; Size of parameters
@params EQU 10
; Build frame
LINK A6,#0
; Compare bytes
CLR.B @result(A6)
MOVE.L @data1(A6),A0
MOVE.L @data2(A6),A1
MOVE.W @count(A6),D0
SUB.W #1,D0
@1 MOVE.B (A0)+,D1
CMP.B (A1)+,D1
BNE.S @2
DBF D0,@1
MOVE.B #1,@result(A6)
; Clean up and exit
@2 UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
ConvertToGray PROC EXPORT
; Calling sequence (Pascal conventions):
;
; FUNCTION ConvertToGray (r, g, b: INTEGER): CHAR;
; Parameter Offsets
@result EQU 14
@r EQU 12
@g EQU 10
@b EQU 8
; Gray level weights
@rw EQU 30
@gw EQU 59
@bw EQU 11
; Size of parameters
@params EQU 6
; Compute gray level
LINK A6,#0
MOVE.W @r(A6),D0
AND.W #$FF,D0
MULU.W #@rw,D0
MOVE.W @g(A6),D1
AND.W #$FF,D1
MULU.W #@gw,D1
ADD.W D1,D0
MOVE.W @b(A6),D1
AND.W #$FF,D1
MULU.W #@bw,D1
ADD.W D1,D0
ADD.W #50,D0
EXT.L D0
DIVU.W #100,D0
MOVE.W D0,@result(A6)
; Clean up and exit
@3 UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoFindBounds PROC EXPORT
; Calling sequence (Pascal conventions):
;
; FUNCTION DoFindBounds (dataPtr: Ptr;
; count: INTEGER;
; VAR first: INTEGER;
; VAR last: INTEGER): BOOLEAN;
;
; Parameter Offsets
@result EQU 22
@dataPtr EQU 18
@count EQU 16
@first EQU 12
@last EQU 8
; Size of parameters
@params EQU 14
; Save registers
LINK A6,#0
MOVEM.L D3-D4,-(SP)
; Find bounds
MOVE.L @dataPtr(A6),A0
MOVE.W @count(A6),D0
CLR.W D1
CLR.B D2
@1 TST.B (A0)+
BEQ.S @3
TST.B D2
BNE.S @2
MOVE.B #1,D2
MOVE.W D1,D3
@2 MOVE.W D1,D4
@3 ADD.W #1,D1
CMP.W D1,D0
BNE.S @1
MOVE.B D2,@result(A6)
MOVE.L @first(A6),A0
MOVE.W D3,(A0)
MOVE.L @last(A6),A0
MOVE.W D4,(A0)
; Clean up and exit
MOVEM.L (SP)+,D3-D4
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
DoStepCopyBytes PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoStepCopyBytes (srcPtr: Ptr;
; dstPtr: Ptr;
; count: INTEGER;
; step1: INTEGER;
; step2: INTEGER);
;
; Parameter Offsets
@srcPtr EQU 18
@dstPtr EQU 14
@count EQU 12
@step1 EQU 10
@step2 EQU 8
; Size of parameters
@params EQU 14
; Save registers
LINK A6,#0
; Unload parameters
MOVE.L @srcPtr(A6),A0
MOVE.L @dstPtr(A6),A1
MOVE.W @count(A6),D0
MOVE.W @step1(A6),D1
MOVE.W @step2(A6),D2
; Copy the bytes
SUB.W #1,D0
@1 MOVE.B (A0),(A1)
ADDA.W D1,A0
ADDA.W D2,A1
DBF D0,@1
; Clean up and exit
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ARes'
CompareWords PROC EXPORT
; Calling sequence (C conventions):
;
; int CompareWords (elem1, elem2)
; char *elem1;
; char *elem2;
;
; Unload parameters
MOVE.L 4(SP),A0
MOVE.L 8(SP),A1
; Compare short words
MOVE.W (A0),D0
CMP.W (A1),D0
BGT.S @1
BLT.S @2
; Entries are equal
CLR.L D0
RTS
; First entry is greater
@1 MOVE.L #1,D0
RTS
; First entry is lesser
@2 MOVE.L #-1,D0
RTS
; **********************************************************************
SEG 'ARes'
CompareUnsignedLongs PROC EXPORT
; Calling sequence (C conventions):
;
; int CompareUnsignedLongs (elem1, elem2)
; char *elem1;
; char *elem2;
;
; Unload parameters
MOVE.L 4(SP),A0
MOVE.L 8(SP),A1
; Compare short words
MOVE.L (A0),D0
CMP.L (A1),D0
BHI.S @1
BLO.S @2
; Entries are equal
CLR.L D0
RTS
; First entry is greater
@1 MOVE.L #1,D0
RTS
; First entry is lesser
@2 MOVE.L #-1,D0
RTS
; **********************************************************************
SEG 'ARes'
MakeRamp PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE MakeRamp (VAR map: TLookUpTable;
; limit: INTEGER);
;
; Parameter Offsets
@map EQU 10
@limit EQU 8
; Size of parameters
@params EQU 6
; Save registers
LINK A6,#0
; Unload parameters
MOVE.L @map(A6),A0
ADDA.W #256,A0
MOVE.W @limit(A6),D1
; Compute ramp backwards
MOVE.W #255,D0
@1 MOVE.W D1,D2
MULU.W D0,D2
ADD.L #127,D2
DIVU.W #255,D2
MOVE.B D2,-(A0)
DBF D0,@1
; Clean up and exit
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
END