104 lines
4.6 KiB
Plaintext
104 lines
4.6 KiB
Plaintext
this modset adds special facilities to the pascal compiler for
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compiling the a68s compiler and run-time system. the facilities
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added are sufficient for their purpose, but no checks for mis-use are
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made, and anyone using them for other purposes does so at his own risk.
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*******************************************
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********************************************
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these mods introduce the following built-in procedures and functions:
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procedure setstktop(size, a, v: integer);
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sets the word in (b5-1-a) (?) to the value v. size must be >0.
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procedure enew(p: nilptr; size: integer);
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as new, but exactly size words are obtained.
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procedure edispose(p: nilptr; size: integer);
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as dispose, but exactly size words are returned.
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procedure moveleft(from, to: nilptr; size: integer);
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moves a block of 'size' words starting at 'from' to 'to'.
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copying starts at the leftmost word.
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size must be a multiple of word size.
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function getstktop(size, a: integer): integer;
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returns the value held in (b5-1-a)(?). size must be >0.
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function asptr(v: integer): nilptr;
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returns the value of v as if it were a pointer. the function
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asptr may be used in any context in a pascal program where nil
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would be acceptable (in algol 68 terminology - in any strong
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context). note that the language already provides the function
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'ord' to perform the converse operation of 'asptr'.
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function incptr(p: nilptr; v: integer): nilptr;
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increments the pointer p by v, and returns the result.
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*********************************************
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The following additional compiler options are provided
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e: all procedure names external (even inner ones) (-)
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g: global declarations compiled (+)
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when compiling segments of procedures:
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g- implies that global declarations are merely repetitions
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(which had better be correct!) of declarations in some
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master segment.
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when compiling main program:
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g- implies that such a master segment is being compiled.
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w: generate warnings as well as error messages (+)
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all the above options are translated to lower case, thus are case
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independent. This applies to options in the source file and to those
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passed via C_EM_PC.
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*********************************************
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----------------------------
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revision 2.10
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date: 86/08/19 15:22:09; author: dw; state: Exp; lines added/del: 2/1
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This lets 'getstktop' know about reals so it does not try to convert what
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is already a real to a real and get it wrong.
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----------------------------
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revision 2.9
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date: 86/08/13 12:03:49; author: dw; state: Exp; lines added/del: 3/2
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more of 2.8, label now after goto descriptor
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----------------------------
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revision 2.8
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date: 86/08/11 19:57:32; author: dw; state: Exp; lines added/del: 49/0
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This makes labels that are jumped to non-locally have a global label
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associated with them. The labels are of the form _xxxnnn where xxx is the
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number of the label & nnn is the name of the routine.
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----------------------------
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revision 2.7
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date: 86/07/17 19:42:29; author: dw; state: Exp; lines added/del: 2/1
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This fixes getstktop. It now uses 'ads' rather than 'adu'. The changes have
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been made in 'call'.
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----------------------------
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revision 2.6
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date: 86/07/17 19:30:30; author: dw; state: Exp; lines added/del: 15/0
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This causes all USER procedural identifiers ( <PRO> ) to be in upper case
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Modifacation to 'argident'. (m_a_i_n) is left in lower case for 'ld'.
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----------------------------
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revision 2.5
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date: 86/07/17 19:25:10; author: dw; state: Exp; lines added/del: 7/1
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This forces the compiler to take note of where an EXTERN procedure is
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declared and make it STATICALLY be there.
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----------------------------
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revision 2.4
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date: 86/07/17 19:22:39; author: dw; state: Exp; lines added/del: 13/1
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'r' option sets the effective upperbound as high as is possible
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----------------------------
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revision 2.3
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date: 86/07/17 19:20:20; author: dw; state: Exp; lines added/del: 19/1
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This implements incptr.
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----------------------------
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revision 2.2
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date: 86/03/14 20:35:27; author: dw; state: Exp; lines added/del: 39/3
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This should cure the problem of the compiler not allowing output to the
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file OUTPUT from a seperatly compiled segment. It does this by always
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setting up INPUT and OUTPUT.
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----------------------------
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revision 2.1
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date: 86/03/03 21:53:06; author: dw; state: Exp; lines added/del: 278/26
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This is the alternate form of the compiler as modified by CHL
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It offers several extentions to the existing compiler needed to compile
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the ALGOL68S compiler.
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=============================================================================
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