📄 exaid.asm

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page	49,132
	TITLE	exAId	-	Array Id Executors
;***
;exaid.asm - executors for simple id references.
;
;	Copyright <C> 1986, Microsoft Corporation
;
;Purpose:
;	This module contains all exAId executors and all exAVtRf executors.
;
;	In general, these executors are very speed critical.
;
;
;****************************************************************************

	.xlist
	include 	version.inc
	IncludeOnce	architec
	IncludeOnce	array
	IncludeOnce	context
	IncludeOnce	executor
	IncludeOnce	exint
	IncludeOnce	extort
	IncludeOnce	opid
	IncludeOnce	pcode		
	IncludeOnce	qbimsgs
	IncludeOnce	rtinterp
	IncludeOnce	variable
	.list


assumes cs, CODE
assumes es, NOTHING
assumes ss, DATA


sBegin	CODE

	subttl	I2 Load Executors
	page
	;Indirect

MakeExe exAIdIILd2,opAIdLd,ET_Imp
	SkipExHeader
MakeExe exAIdEILdI2,opAIdLd,ET_I2
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	GetpFrame
	mov	bx,[pFrame]		;ds:bx = pointer to array descriptor
	cmp	cl,[bx].AD_cDims	;Correct number of indices?
	jz	ALdI2
	jmp	IndexCountErr
	
;Common
MakeExe exAIdECLdI2,opAIdLd,ET_I2
	SkipExHeader
MakeExe exAIdICLd2,opAIdLd,ET_Imp
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX				;Get oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	dx,[pVarBx].ACOM_oValue		;Offset into common block
	test	byte ptr [pVarBx-VAR_value].VAR_fStat,FV_STATIC 
						;Is the array $STATIC?
	mov	bx,[pVarBx].ACOM_oCommon	;oCommon
	jz	@F
	add	bx,COM_bdType - COM_bdValue	;Adjust to point to type table
@@:
	add	bx,[grs.GRS_bdtComBlk.BD_pb]	;pCommon
	mov	bx,[bx].COM_bdValue.BD_pb	;Common block
	add	bx,dx				;Offset in block
	jmp	short ALdI2

;Frame
MakeExe exAIdIFLd2,opAIdLd,ET_Imp
	SkipExHeader
MakeExe exAIdEFLdI2,opAIdLd,ET_I2
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]
	add	bx,bp			;ss:bx = pointer to array descriptor
	jmp	short ALdI2

	;Public


	;Static

MakeExe exAIdESLdI2,opAIdLd,ET_I2
	SkipExHeader
MakeExe exAIdISLd2,opAIdLd,ET_Imp
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX 			;Load operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
ALdI2S: 				
	lea	bx,[pVarBx].ASTAT_ad	;ds:bx = array descriptor address
ALdI2:
	call	ResolveArray		;resolve to segment and offset in dx:bx
	GETSEG	ds,dx,di,<SPEED,LOAD>	; Move to array element segment
	push	[bx]			;Push the I2
	    mov     ax,ss
	    mov     ds,ax		;Restore the data segment
	DispMac

	;Optimized I2 load/store executors for 1 index

	;Frame load

MakeExe exA1IdIFLdI2,opAIdLd,ET_Imp
	SkipExHeader
MakeExe exA1IdEFLdI2,opAIdLd,ET_I2
	inc	si
	inc	si			;Skip cDims
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]
	add	bx,bp			;bx = pointer to array descriptor
	    mov     dx,ds		;Save psVariableTable
	jmp	short A1LdI2

	;Static load

MakeExe exA1IdESLdI2,opAIdLd,ET_I2
	SkipExHeader
MakeExe exA1IdISLdI2,opAIdLd,ET_Imp
	inc	si
	inc	si			;Skip count ot indices
	LODSWTX 			;Load operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	lea	bx,[pVarBx].ASTAT_ad	;ds:bx = array descriptor address
	    mov     dx,ds		;Save psVariableTable
A1LdI2:
	mov	cx,[bx].AD_fhd.FHD_hData
	jcxz	RangeErr		; Brif array not allocated
	pop	ax			;Get index
	sub	ax,[bx].AD_tDM.DM_iLbound	;Subtract lower bound
	jl	RangeErr
	cmp	ax,[bx].AD_tDM.DM_cElements	;Test for range
	jge	RangeErr
	shl	ax,1
	add	ax,[bx].AD_fhd.FHD_oData ;Add base offset
	GETSEG	ds,cx,bx,<SPEED,LOAD>	; Move to array element segment
	xchg	bx,ax
	push	[bx]			;Push the I2
	    mov     ds,dx		;Restore module var table
	DispMac

IndexCountErr:
RangeErr:
	mov	al,ER_SOR		;Subscript out of range
	call	RtErrorCODE		;generate error, don't return

	;Frame store

MakeExe exA1IdIFStI2,opAIdSt,ET_Imp
	SkipExHeader
MakeExe exA1IdEFStI2,opAIdSt,ET_I2
	inc	si
	inc	si			;Skip count ot indices
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]
	add	bx,bp			;bx = pointer to array descriptor
	    mov     dx,ds		;Save psVariableTable
	jmp	short A1StI2

	;Static store

MakeExe exA1IdESStI2,opAIdSt,ET_I2
	SkipExHeader
MakeExe exA1IdISStI2,opAIdSt,ET_Imp
	inc	si
	inc	si			;Skip count ot indices
	LODSWTX 			;Load operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	lea	bx,[pVarBx].ASTAT_ad	;ds:bx = array descriptor address
	    mov     dx,ds		;Save psVariableTable
A1StI2:
	mov	cx,[bx].AD_fhd.FHD_hData
	jcxz	RangeErr		; Brif array not allocated
	pop	ax			;Get index
	sub	ax,[bx].AD_tDM.DM_iLbound	;Subtract lower bound
	jl	RangeErr
	cmp	ax,[bx].AD_tDM.DM_cElements	;Test for range
	jge	RangeErr
	shl	ax,1
	add	ax,[bx].AD_fhd.FHD_oData ;Add base offset
	GETSEG	ds,cx,bx,<SPEED,LOAD>	; Move to array element segment
	xchg	bx,ax
	pop	[bx]			;Store the I2
	    mov     ds,dx		;Restore module var table
	DispMac 			; and dispatch next executor


	subttl	I2 Store Executors
	page
	;Common

MakeExe exAIdICSt2,opAIdSt,ET_Imp
	SkipExHeader
MakeExe exAIdECStI2,opAIdSt,ET_I2
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX				;Get oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	dx,[pVarBx].ACOM_oValue		;Offset into common block
	test	byte ptr [pVarBx-VAR_value].VAR_fStat,FV_STATIC 
						;Is the array $STATIC?
	mov	bx,[pVarBx].ACOM_oCommon	;oCommon
	jz	@F
	add	bx,COM_bdType - COM_bdValue	;Adjust to point to type table
@@:

	add	bx,[grs.GRS_bdtComBlk.BD_pb]	;pCommon
	mov	bx,[bx].COM_bdValue.BD_pb	;Common block
	add	bx,dx				;Offset in block
	jmp	short AStI2

;Indirect
MakeExe exAIdIISt2,opAIdSt,ET_Imp
	SkipExHeader
MakeExe exAIdEIStI2,opAIdSt,ET_I2
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	GetpFrame
	mov	bx,[pFrame]		;bx = pointer to array descriptor
	cmp	cl,[bx].AD_cDims	;Correct number of indices?
	jz	AStI2
	jmp	IndexCountErr

;Frame
MakeExe exAIdEFStI2,opAIdSt,ET_I2
	SkipExHeader
MakeExe exAIdIFSt2,opAIdSt,ET_Imp
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]
	add	bx,bp			;bx = pointer to array descriptor
	jmp	short AStI2

	;Public


	;Static

MakeExe exAIdESStI2,opAIdSt,ET_I2
	SkipExHeader
MakeExe exAIdISSt2,opAIdSt,ET_Imp
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX 			;Load operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
AStI2S: 				
	lea	bx,[pVarBx].ASTAT_ad	; ds:bx = array descriptor address
AStI2:
	call	ResolveArray		;resolve to segment and offset in dx:bx
	GETSEG	ds,dx,di,<SPEED,LOAD>	; Move to array element segment
	pop	[bx]			;Pop the I2 to the variable value
	    mov     ax,ss
	    mov     ds,ax		;Restore the data segment
	DispMac

	subttl	I4 Load Executors
	page
	;Indirect

MakeExe exAIdEILdI4,opAIdLd,ET_I4
	SkipExHeader
MakeExe exAIdIILd4,opAIdLd,ET_Imp
	LODSWTX 			    ;Index argument count
	xchg	ax,cx
	LODSWTX 			    ;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	GetpFrame
	mov	bx,[pFrame]		    ;bx = pointer to array descriptor
	cmp	cl,[bx].AD_cDims	    ;Correct number of indices?
	jz	ALd4
	jmp	IndexCountErr

;Common
MakeExe exAIdECLdI4,opAIdLd,ET_I4
	SkipExHeader
MakeExe exAIdICLd4,opAIdLd,ET_Imp
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX				;Get oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	dx,[pVarBx].ACOM_oValue		;Offset into common block
	test	byte ptr [pVarBx-VAR_value].VAR_fStat,FV_STATIC 
						;Is the array $STATIC?
	mov	bx,[pVarBx].ACOM_oCommon	;oCommon
	jz	@F
	add	bx,COM_bdType - COM_bdValue	;Adjust to point to type table
@@:
	add	bx,[grs.GRS_bdtComBlk.BD_pb]	;pCommon
	mov	bx,[bx].COM_bdValue.BD_pb	;Common block
	add	bx,dx				;Offset in block
	jmp	short ALd4

;Frame
MakeExe exAIdEFLdI4,opAIdLd,ET_I4
	SkipExHeader
MakeExe exAIdIFLd4,opAIdLd,ET_Imp
	LODSWTX 			    ;Index argument count
	xchg	ax,cx
	LODSWTX 			    ;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]   
	add	bx,bp			    ;bx = pointer to array descriptor
	jmp	short ALd4

	;Public


;Static
MakeExe exAIdESLdI4,opAIdLd,ET_I4
	SkipExHeader
MakeExe exAIdISLd4,opAIdLd,ET_Imp
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;Operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
ALd4S:
	lea	bx,[pVarBx].ASTAT_ad	; ds:bx = array descriptor address
ALd4:
	call	ResolveArray		;resolve to segment and offset in dx:bx
	GETSEG	ds,dx,di,<SPEED,LOAD>	; Move to array element segment
SLoad4X:
	push	[bx+2]			;Push second word
	push	[bx]			;Push first word
	    mov     ax,ss
	    mov     ds,ax		;Restore the data segment
	DispMac

;Added with [15]
subttl	R4 Load Executors
page

;Indirect
MakeExe exAIdEILdR4,opAIdLd,ET_R4
	SkipExHeader
MakeExe exAIdIILdR4,opAIdLd,ET_Imp
	LODSWTX 			    ;Index argument count
	xchg	ax,cx
	LODSWTX 			    ;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	GetpFrame
	mov	bx,[pFrame]		    ;bx = pointer to array descriptor
	cmp	cl,[bx].AD_cDims	    ;Correct number of indices?
	jz	ALdR4
	jmp	IndexCountErr

;Common
MakeExe exAIdECLdR4,opAIdLd,ET_R4
	SkipExHeader
MakeExe exAIdICLdR4,opAIdLd,ET_Imp
	LODSWTX 			;Load argument count
	xchg	ax,cx
	LODSWTX				;Get oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	dx,[pVarBx].ACOM_oValue		;Offset into common block
	test	byte ptr [pVarBx-VAR_value].VAR_fStat,FV_STATIC 
						;Is the array $STATIC?
	mov	bx,[pVarBx].ACOM_oCommon	;oCommon
	jz	@F
	add	bx,COM_bdType - COM_bdValue	;Adjust to point to type table
@@:
	add	bx,[grs.GRS_bdtComBlk.BD_pb]	;pCommon
	mov	bx,[bx].COM_bdValue.BD_pb	;Common block
	add	bx,dx				;Offset in block
	jmp	short ALdR4

;Frame
MakeExe exAIdEFLdR4,opAIdLd,ET_R4
	SkipExHeader
MakeExe exAIdIFLdR4,opAIdLd,ET_Imp
	LODSWTX 			    ;Index argument count
	xchg	ax,cx
	LODSWTX 			    ;oVar
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
	mov	bx,[pVarBx+AFRAME_oFrame]   
	add	bx,bp			    ;bx = pointer to array descriptor
	jmp	short ALdR4

	;Public


;Static
MakeExe exAIdESLdR4,opAIdLd,ET_R4
	SkipExHeader
MakeExe exAIdISLdR4,opAIdLd,ET_Imp
	LODSWTX 			;Index argument count
	xchg	ax,cx
	LODSWTX 			;Operand
	xchg	ax,bx			; BX = oVar
	DbChk	oVar,bx 		; Check for valid oVar
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