Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > alt.os.development > #8311
| From | "Rod Pemberton" <boo@fasdfrewar.cdm> |
|---|---|
| Newsgroups | alt.os.development |
| Subject | Re: What form of executable or load module for your OS? |
| Date | 2015-07-07 05:40 -0400 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <op.x1ec5fnryfako5@localhost> (permalink) |
| References | (14 earlier) <853c70d5-5652-42e9-ac0f-e4b832b56ca3@googlegroups.com> <mnc6th$qa4$1@dont-email.me> <cec50788-642e-40f0-bf0f-29c74057392f@googlegroups.com> <op.x1ckdiopyfako5@localhost> <64c08e9f-141c-4340-adee-a8affd4cb070@googlegroups.com> |
On Tue, 07 Jul 2015 04:44:33 -0400, Alexei A. Frounze <alexfrunews@gmail.com> wrote: > I have to remind you again that the compiler is not an optimizing > one and even some trivial stuff is not optimized so as not to > (over)complicate or enlarge its code. The issue at this point was getting working 8086 for James. Emitting 8086 is going to complicate things slightly. Of course, I had assumed James already did some testing with NASM for x86, which was why he was taking issue with SmallerC, but apparently that wasn't the situation. > I think you still don't realize the simple idea of a simple > compiler as also evidenced by the earlier statement that the > generation of jcc's is somehow wrong It is. > (and NASM being wrong as well, It is. As you noted, 0.98.39 is not perfect either, but at one point in time it was much better than other assemblers. Now? You might as well use MASM ... NASM is doing the same things as MASM does. I'll blame H.P.A. for that, since he introduced a bunch of that crud for 64-bit mode. > It's all by design, by a simple design. It's interesting that when I mention "simpler" designs and method of implementations both here and elsewhere, e.g., comp.lang.asm.x86, comp.lang.misc, alt.lang.asm, etc that everyone rejects my "simpler" design, which is provably so. So, why should you be any different? ... ;-) Also, are you using SETcc for any condition other than CF=1 as SETC? E.g., do you use SETZ, SETS, SETP, SETO, etc? I'm assuming you're using SETG, SETGE, SETL, SETLE, SETA, SETAE, SETB, SETBE, for signed and unsigned integer comparisons. However, use of the CF from comparison may be generating SETC in general code. For 8086, SETcc could be eliminated for the SETC case without using Jcc: SALC ; 0x00 for CF=0 or 0xFF for CF=1 CBW ; optionally, extend to 0 or -1 as 16-bit It does use SALC, which is officially "undocumented" but well known and widely used. If 16-bit extension isn't needed, then SALC will do, optionally AND 01h to match 0 or 1 from SETC. Although, you may prefer SALC CBW for 16-bit logical operations from bitwise instructions for 8086. Rod Pemberton -- Tolerance and socialism attracts intolerance and terrorism. See: France, United Kingdom, Germany, Denmark, Belgium, Netherlands, ... UK: Strong encryption, non-issue. GR: Eurozone currency, priority.
Back to alt.os.development | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-06-25 21:20 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-01 10:36 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-01 21:07 -0700
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-02 23:35 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-03 08:35 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-03 02:49 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-03 11:27 +0100
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-03 16:54 -0400
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-03 22:45 +0100
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-03 17:56 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-03 15:28 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-03 23:48 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-03 21:52 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-04 04:00 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-04 04:42 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-05 02:12 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-05 00:47 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-05 05:28 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-05 02:58 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-06 06:21 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-07 01:44 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-07 05:40 -0400
Re: What form of executable or load module for your OS? "Kerr Mudd-John" <admin@127.0.0.1> - 2015-07-07 14:02 +0100
Re: What form of executable or load module for your OS? "wolfgang kern" <nowhere@never.at> - 2015-07-07 18:13 +0200
Re: What form of executable or load module for your OS? "Kerr Mudd-John" <notsaying@invalid.org> - 2015-07-08 12:54 -0100
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-09 13:19 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-07 22:10 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-08 08:48 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-08 23:53 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-09 17:29 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-10 01:01 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-10 13:46 +0100
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-10 00:59 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-08 03:52 -0400
Re: What form of executable or load module for your OS? "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-08 06:46 -0700
Re: What form of executable or load module for your OS? "James Harris" <james.harris.1@gmail.com> - 2015-07-09 13:16 +0100
Re: What form of executable or load module for your OS? "s_dubrovich@yahoo.com" <s_dubrovich@yahoo.com> - 2015-07-11 09:57 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-13 02:47 -0400
Re: What form of executable or load module for your OS? "s_dubrovich@yahoo.com" <s_dubrovich@yahoo.com> - 2015-07-14 07:39 -0700
Re: What form of executable or load module for your OS? "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-15 02:37 -0400
Code insanity "Mike Gonta" <mikegonta@gmail.com> - 2015-07-03 03:47 -0400
Re: Code insanity "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-03 02:57 -0700
Re: Code insanity (was: What form of executable or load module for your OS?) "James Harris" <james.harris.1@gmail.com> - 2015-07-03 11:35 +0100
csiph-web