mirror of
https://github.com/SEPPDROID/Digital-Research-Source-Code.git
synced 2025-10-26 09:54:20 +00:00
Upload
Digital Research
This commit is contained in:
424
ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmvax/somewhere.for
Normal file
424
ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmvax/somewhere.for
Normal file
@@ -0,0 +1,424 @@
|
||||
C***********************************************************************
|
||||
C
|
||||
C SOMEWHERE.FOR
|
||||
C
|
||||
C D I S C L A I M E R N O T I C E
|
||||
C ------------------- -----------
|
||||
C
|
||||
C This document and/or portions of the material and data furnished
|
||||
C herewith, was developed under sponsorship of the U. S. Government.
|
||||
C Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior
|
||||
C University, nor their employees, nor their respective contractors,
|
||||
C subcontractors, or their employees, makes any warranty, express or
|
||||
C implied, or assumes any liability or responsibility for accuracy,
|
||||
C completeness or usefulness of any information, apparatus, product
|
||||
C or process disclosed, or represents that its use will not infringe
|
||||
C privately-owned rights. Mention of any product, its manufacturer,
|
||||
C or suppliers shall not, nor is it intended to, imply approval, dis-
|
||||
C approval, or fitness for any particular use. The U. S. and the
|
||||
C University at all times retain the right to use and disseminate same
|
||||
C for any purpose whatsoever. Such distribution shall be made by the
|
||||
C National Energy Software Center at the Argonne National Laboratory
|
||||
C and only subject to the distributee furnishing satisfactory proof
|
||||
C that he has a valid license from the Intel Corporation in effect.
|
||||
C
|
||||
C
|
||||
C-----------------------------------------------------------------------
|
||||
C
|
||||
C This module of the PL/M-VAX compiler is the main workhorse for
|
||||
C code generation. It is invoked (recursively) to actually generate
|
||||
C code from a specified code tree, with the resulting value of the
|
||||
C code tree (if any) to be manifested in some desired place ('where').
|
||||
C
|
||||
C-----------------------------------------------------------------------
|
||||
C
|
||||
C R E V I S I O N H I S T O R Y
|
||||
C
|
||||
C 08SEP81 Alex Hunter 1. Temporarily disabled ref_count checking
|
||||
C for atoms. (V5.1)
|
||||
C 2. Fixed bug for procedure call when refct>1.
|
||||
C 15OCT81 Alex Hunter 1. Experimental version. (V5.4)
|
||||
C 23OCT81 Alex Hunter 1. Correct manifestation for OP_LOC. (V5.6)
|
||||
C 2. Improve choice of preferred register.
|
||||
C
|
||||
C***********************************************************************
|
||||
INTEGER*2 FUNCTION GET_SOMEWHERE(NODX,WHEREX)
|
||||
INCLUDE 'PLMCOM.FOR/NOLIST'
|
||||
CHARACTER*80 OPERAND,OPERAND1,OPERAND2
|
||||
C
|
||||
NOD=NODX
|
||||
WHERE=WHEREX
|
||||
|
||||
IF (NOD.EQ.NULL) THEN
|
||||
GET_SOMEWHERE=NULL
|
||||
RETURN
|
||||
ENDIF
|
||||
|
||||
IF (NODE_REG(NOD).NE.0) THEN
|
||||
REG=NODE_REG(NOD)
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
GO TO 100
|
||||
ENDIF
|
||||
|
||||
IF (LITERAL(NOD)) GO TO 50
|
||||
|
||||
IF (CONSTANT(NOD)) GO TO 50
|
||||
|
||||
IF (ATOM(NOD)) THEN
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL MAKE_ADDRESSABLE(NOD)
|
||||
CALL POP(WHERE,1)
|
||||
CALL POP(NOD,1)
|
||||
CCCC IF (NODE_REFCT(NOD).GT.1) THEN ! (Temporarily disabled)
|
||||
CCCC REG=ALLOCATE_REG(NODE_TYPE(NOD))
|
||||
CCCC CALL EMIT_CODE(OP_ASSN,NOD,NULL,REG)
|
||||
CCCC NODE_REG(NOD)=REG
|
||||
CCCC NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
CCCC GO TO 100
|
||||
CCCC ENDIF
|
||||
GO TO 50
|
||||
ENDIF
|
||||
|
||||
C -- NODE MUST BE AN OPNODE.
|
||||
|
||||
IF (OPNODE_OP(NOD).EQ.OP_MOV) THEN
|
||||
XX=GET_SOMEWHERE2(OPNODE_OPND1(NOD),OPNODE_OPND2(NOD))
|
||||
GET_SOMEWHERE=NULL
|
||||
RETURN
|
||||
|
||||
ELSEIF (OPNODE_OP(NOD).EQ.OP_ASSN) THEN
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
IF (WHERE.GE.REG_MIN.AND.WHERE.LE.REG_MAX) THEN
|
||||
REG=GET_SOMEWHERE2(OPNODE_OPND1(NOD),WHERE)
|
||||
ELSE
|
||||
REG=GET_SOMEWHERE2(OPNODE_OPND1(NOD),ANY_REG)
|
||||
ENDIF
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
CALL POP(NOD,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(REG,1)
|
||||
CALL MAKE_ADDRESSABLE(OPNODE_OPND2(NOD))
|
||||
CALL POP(REG,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
CALL EMIT_CODE(OP_ASSN,REG,NULL,OPNODE_OPND2(NOD))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(OPNODE_OPND2(NOD)))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(OPNODE_OPND2(NOD)))
|
||||
GO TO 100
|
||||
|
||||
ELSEIF (OPNODE_OP(NOD).EQ.OP_CALL) THEN
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
NARGS=GET_SOMEWHERE2(OPNODE_OPND2(NOD),ON_STACK)
|
||||
CALL POP(NOD,1)
|
||||
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(NARGS,1)
|
||||
LOC1=GET_SOMEWHERE2(OPNODE_OPND1(NOD),ANY_WHERE)
|
||||
CALL POP(NARGS,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
|
||||
OPERAND2=OPERAND(LOC1,N2)
|
||||
|
||||
IF (OPERAND2(1:1).EQ.'(') THEN ! Indirect Call.
|
||||
OPERAND2='L^V.'//OPERAND2
|
||||
N2=N2+4
|
||||
ENDIF
|
||||
|
||||
IF (MODEL.EQ.2 .OR. MODEL.EQ.4) THEN
|
||||
OPND1=MAKE_FIXED2(NARGS,S_LONG)
|
||||
OPERAND1=OPERAND(OPND1,N1)
|
||||
CALL EMIT('CALLS '//OPERAND1(:N1)//','//
|
||||
# OPERAND2(:N2))
|
||||
ELSEIF (NARGS.EQ.0) THEN
|
||||
CALL EMIT('CALLS #0,'//OPERAND2(:N2))
|
||||
ELSE
|
||||
CALL EMIT_CODE(OP_B2L,MAKE_FIXED2(NARGS,S_BYTE),NULL,
|
||||
# ON_STACK)
|
||||
CALL EMIT('CALLG (R10),'//OPERAND2(:N2))
|
||||
CALL EMIT_CODE(OP_ADD,MAKE_FIXED2((NARGS+1)*4,S_LONG),NULL,
|
||||
# 10)
|
||||
ENDIF
|
||||
|
||||
NODE_TYPE(R0)=NODE_TYPE(NOD)
|
||||
|
||||
IF (WHERE.EQ.ANY_WHERE .OR. WHERE.EQ.ANY_REG .OR.
|
||||
# NODE_REFCT(NOD).GT.1) THEN
|
||||
|
||||
REG=ALLOCATE_REG(NODE_TYPE(NOD))
|
||||
CALL EMIT_CODE(OP_ASSN,R0,NULL,REG)
|
||||
NODE_REG(NOD)=REG
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
GO TO 100
|
||||
|
||||
ELSEIF (WHERE.EQ.ON_STACK) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,R0,NULL,ON_STACK)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
GET_SOMEWHERE=ON_STACK
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.GE.REG_MIN .AND. WHERE.LE.REG_MAX) THEN
|
||||
IF (WHERE.NE.R0) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,R0,NULL,WHERE)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
ENDIF
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
|
||||
ELSE ! (WHERE IS ATOM)
|
||||
IF (ATOM_SUB(WHERE).EQ.NULL.AND.ATOM_BASE(WHERE).EQ.NULL)
|
||||
# THEN
|
||||
CALL EMIT_CODE(OP_ASSN,R0,NULL,WHERE)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
ENDIF
|
||||
REG=ALLOCATE_REG(NODE_TYPE(NOD))
|
||||
CALL EMIT_CODE(OP_ASSN,R0,NULL,REG)
|
||||
NODE_REG(NOD)=REG
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
GO TO 150
|
||||
ENDIF
|
||||
|
||||
ELSEIF (OPNODE_OP(NOD).EQ.OP_ARG) THEN
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
XX=GET_SOMEWHERE2(OPNODE_OPND2(NOD),ON_STACK)
|
||||
CALL POP(NOD,1)
|
||||
CALL PUSH(NOD,1)
|
||||
NARGS=GET_SOMEWHERE2(OPNODE_OPND1(NOD),ON_STACK)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
GET_SOMEWHERE=NARGS+1
|
||||
RETURN
|
||||
|
||||
ELSEIF ((OPNODE_OP(NOD).EQ.OP_ADWC.OR.OPNODE_OP(NOD).EQ.OP_SBWC)
|
||||
# .AND.OPNODE_OPND1(NOD).NE.WHERE) THEN
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
REG=GET_SOMEWHERE2(OPNODE_OPND1(NOD),ANY_REG)
|
||||
CALL POP(NOD,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(REG,1)
|
||||
LOC2=GET_SOMEWHERE2(OPNODE_OPND2(NOD),ANY_WHERE)
|
||||
CALL POP(REG,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
NODE_REG(OPNODE_OPND1(NOD))=0
|
||||
CALL EMIT_CODE(OPNODE_OP(NOD),LOC2,REG,REG)
|
||||
NODE_REG(NOD)=REG
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
GO TO 100
|
||||
ENDIF
|
||||
|
||||
IF (OPNODE_OP(NOD).EQ.OP_LOC) THEN
|
||||
LOC1=OPNODE_OPND1(NOD)
|
||||
LOC2=OPNODE_OPND2(NOD)
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(LOC1,1)
|
||||
CALL PUSH(LOC2,1)
|
||||
CALL MAKE_ADDRESSABLE(LOC1)
|
||||
CALL POP(LOC2,1)
|
||||
CALL PUSH(LOC2,1)
|
||||
CALL MAKE_ADDRESSABLE(LOC2)
|
||||
CALL POP(LOC2,1)
|
||||
CALL POP(LOC1,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
ELSE
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
LOC1=GET_SOMEWHERE2(OPNODE_OPND1(NOD),ANY_WHERE)
|
||||
CALL POP(NOD,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(LOC1,1)
|
||||
LOC2=GET_SOMEWHERE2(OPNODE_OPND2(NOD),ANY_WHERE)
|
||||
CALL POP(LOC1,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
ENDIF
|
||||
|
||||
IF (OPNODE_OP(NOD).EQ.OP_THEN.OR.OPNODE_OP(NOD).EQ.OP_ALSO) THEN
|
||||
GET_SOMEWHERE=NULL
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.EQ.ANY_WHERE .OR. WHERE.EQ.ANY_REG .OR.
|
||||
# NODE_REFCT(NOD).GT.1) THEN
|
||||
|
||||
IF (OPNODE_OP(NOD).EQ.OP_LOC) THEN
|
||||
IF (ATOM(LOC1)) THEN
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(LOC1))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(LOC1))
|
||||
ENDIF
|
||||
ELSE
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND1(NOD))
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND2(NOD))
|
||||
ENDIF
|
||||
IF (REGISTER(LOC1)) THEN
|
||||
PREFERRED_REG=LOC1
|
||||
ELSE
|
||||
PREFERRED_REG=LOC2
|
||||
ENDIF
|
||||
REG=ALLOCATE_REG_WITH_PREFERENCE(NODE_TYPE(NOD),PREFERRED_REG)
|
||||
CALL EMIT_CODE(OPNODE_OP(NOD),LOC2,LOC1,REG)
|
||||
NODE_REG(NOD)=REG
|
||||
NODE_TYPE(REG)=NODE_TYPE(NOD)
|
||||
GO TO 100
|
||||
|
||||
ELSEIF (WHERE.EQ.ON_STACK) THEN
|
||||
CALL EMIT_CODE(OPNODE_OP(NOD),LOC2,LOC1,ON_STACK)
|
||||
IF (OPNODE_OP(NOD).EQ.OP_LOC) THEN
|
||||
IF (ATOM(LOC1)) THEN
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(LOC1))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(LOC1))
|
||||
ENDIF
|
||||
ELSE
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND1(NOD))
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND2(NOD))
|
||||
ENDIF
|
||||
CALL DECREMENT_REFERENCE_COUNTS(NOD)
|
||||
GET_SOMEWHERE=ON_STACK
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.GE.REG_MIN.AND.WHERE.LE.REG_MAX) THEN
|
||||
CALL EMIT_CODE(OPNODE_OP(NOD),LOC2,LOC1,WHERE)
|
||||
IF (OPNODE_OP(NOD).EQ.OP_LOC) THEN
|
||||
IF (ATOM(LOC1)) THEN
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(LOC1))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(LOC1))
|
||||
ENDIF
|
||||
ELSE
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND1(NOD))
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND2(NOD))
|
||||
ENDIF
|
||||
NODE_REG(NOD)=WHERE
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
|
||||
ELSE ! (WHERE IS ATOM)
|
||||
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(LOC1,1)
|
||||
CALL PUSH(LOC2,1)
|
||||
CALL MAKE_ADDRESSABLE(WHERE)
|
||||
CALL POP(LOC2,1)
|
||||
CALL POP(LOC1,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
CALL EMIT_CODE(OPNODE_OP(NOD),LOC2,LOC1,WHERE)
|
||||
IF (OPNODE_OP(NOD).EQ.OP_LOC) THEN
|
||||
IF (ATOM(LOC1)) THEN
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(LOC1))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(LOC1))
|
||||
ENDIF
|
||||
ELSE
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND1(NOD))
|
||||
CALL DECREMENT_VALUE_COUNTS(OPNODE_OPND2(NOD))
|
||||
ENDIF
|
||||
CALL DECREMENT_REFERENCE_COUNTS(NOD)
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(WHERE))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(WHERE))
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
ENDIF
|
||||
|
||||
C --- NODE IS ATOM OR LITERAL.
|
||||
|
||||
50 IF (WHERE.EQ.ANY_WHERE) THEN
|
||||
GET_SOMEWHERE=NOD
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.EQ.ANY_REG) THEN
|
||||
REG=ALLOCATE_REG(NODE_TYPE(NOD))
|
||||
CALL EMIT_CODE(OP_ASSN,NOD,NULL,REG)
|
||||
NODE_REG(NOD)=REG
|
||||
GET_SOMEWHERE=REG
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.EQ.ON_STACK) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,NOD,NULL,ON_STACK)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
GET_SOMEWHERE=ON_STACK
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.GE.REG_MIN.AND.WHERE.LE.REG_MAX) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,NOD,NULL,WHERE)
|
||||
NODE_REG(NOD)=WHERE
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
|
||||
ELSE ! (WHERE IS ATOM)
|
||||
|
||||
CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL MAKE_ADDRESSABLE(WHERE)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
CALL EMIT_CODE(OP_ASSN,NOD,NULL,WHERE)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(WHERE))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(WHERE))
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
ENDIF
|
||||
|
||||
C --- VALUE OF NODE IS ALREADY IN REGISTER.
|
||||
|
||||
100 IF (WHERE.EQ.ANY_WHERE .OR. WHERE.EQ.ANY_REG .OR.
|
||||
# WHERE.EQ.REG) THEN
|
||||
GET_SOMEWHERE=REG
|
||||
RETURN
|
||||
|
||||
ELSEIF(WHERE.EQ.ON_STACK) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,REG,NULL,ON_STACK)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
GET_SOMEWHERE=ON_STACK
|
||||
RETURN
|
||||
|
||||
ELSEIF (WHERE.GE.REG_MIN.AND.WHERE.LE.REG_MAX) THEN
|
||||
CALL EMIT_CODE(OP_ASSN,REG,NULL,WHERE)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD) ! ???
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
|
||||
ELSE ! (WHERE IS ATOM)
|
||||
|
||||
150 CALL PUSH(WHERE,1)
|
||||
CALL PUSH(NOD,1)
|
||||
CALL PUSH(REG,1)
|
||||
CALL MAKE_ADDRESSABLE(WHERE)
|
||||
CALL POP(REG,1)
|
||||
CALL POP(NOD,1)
|
||||
CALL POP(WHERE,1)
|
||||
CALL EMIT_CODE(OP_ASSN,REG,NULL,WHERE)
|
||||
CALL DECREMENT_VALUE_COUNTS(NOD)
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_BASE(WHERE))
|
||||
CALL DECREMENT_REFERENCE_COUNTS(ATOM_SUB(WHERE))
|
||||
GET_SOMEWHERE=WHERE
|
||||
RETURN
|
||||
ENDIF
|
||||
END
|
||||
C--------------------------------------------------------------
|
||||
INTEGER*2 FUNCTION GET_SOMEWHERE2(NODX,WHEREX)
|
||||
IMPLICIT INTEGER*2 (A-Z)
|
||||
GET_SOMEWHERE2=GET_SOMEWHERE(NODX,WHEREX)
|
||||
RETURN
|
||||
END
|
||||
C--------------------------------------------------------------
|
||||
SUBROUTINE MAKE_ADDRESSABLE(ATMX)
|
||||
INCLUDE 'PLMCOM.FOR/NOLIST'
|
||||
|
||||
ATM=ATMX
|
||||
IF (ATOM(ATM)) THEN
|
||||
CALL PUSH(ATM,1)
|
||||
BASEREG=GET_SOMEWHERE(ATOM_BASE(ATM),ANY_REG)
|
||||
CALL POP(ATM,1)
|
||||
XREG=GET_SOMEWHERE(ATOM_SUB(ATM),ANY_REG)
|
||||
ENDIF
|
||||
RETURN
|
||||
END
|
||||
Reference in New Issue
Block a user