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From: dwg@bpdsun1.UUCP (David W. Glessner)
Newsgroups: comp.compilers
Subject: Re: intermetrics z80 inefficiencies
Summary: HI-TECH Z80 compiler
Keywords: code, z80
Message-ID: <1990Jul18.224655.6435@esegue.segue.boston.ma.us>
Date: 18 Jul 90 22:46:55 GMT
References: <1990Jul17.231931.513@esegue.segue.boston.ma.us>
Sender: compilers-sender@esegue.segue.boston.ma.us
Reply-To: dwg@bpdsun1.UUCP (David W. Glessner)
Organization: Harris Broadcast Div., Quincy, IL
Lines: 80
Approved: compilers@esegue.segue.boston.ma.us

In article <1990Jul17.231931.513@esegue.segue.boston.ma.us> "EATON, ROBERT" <rdeaton@ab.com> writes:
>	I have been running shy on code space for a z80-based embedded system.
>This has forced me to begin converting some of the 'C' code, compiled with
>the Intermetrics z80 compiler, to assembly code to save space.

Have you looked at a different compiler?

Last summer, I asked about Z80 cross compilers for a Sun 3 on
comp.lang.c.  One person was "VERY! unhappy" with an older version of
Intermetrics C for the z80 because:
	1) Limited implementation of C
	2) High rate of compiler errors
	3) Relatively poor ROM support
	4) Relatively high price
Another claimed that support from Intermetrics was poor.

Others suggested Microtec, SDSI, and possibly trying to port gcc.

We purchased a source license to HI-TECH Z80 C and ported it to the Sun
3/60.  We haven't tested the HI-TECH package extensively, but we're
quite pleased so far.

Following are the results after coverting some of our Z80 C code from
Eco-Soft C (CP/M based) to HI-TECH (Sun based).

			HI-TECH		Eco-Soft
	ROM space         36718           44831
	RAM space          8272            8428

Note that ROM space includes about 8000 lines of assembly files.

Here is the assembler output for a test program similar to your example.

	global	_func
	global	_ptr
	global	_noptr
	psect	text
;test.c: 1: struct { char a[25]; char friend; } noptr, *ptr;
;test.c: 2: void func(void)
;test.c: 3: {
_func:
	push	iy
;test.c: 4: 	if (ptr->friend == 1) ;
	ld	iy,(_ptr)
	ld	a,(iy+25)
	cp	1
	jp	nz,l3
;test.c: 5: 	if (noptr.friend == 1) ;
l3:
	ld	a,(_noptr+25)
	cp	1
	jp	nz,l2
;test.c: 6: }
l2:
	pop	iy
	ret	
	psect	bss
_noptr:
	defs	26
_ptr:
	defs	2
	psect	text
	end


HI-TECH's address is:
	HI-TECH Software
	P.O. Box 103, Alderley, QLD, 4051,
	AUSTRALIA

	Tel:	+61 7 300 5011
	Fax:	+61 7 300 5246
	E-mail: hitech@hitech.ht.oz.au

--
David	WB9VGB	quintro!bpdsun1!dwg@lll-winken.llnl.gov
		uunet!tiamat!quintro!bpdsun1!dwg
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