Recent posts

#61

Beginner questions / Re: same code pelles c and gcc...

Last post by John Z - March 28, 2026, 10:56:36 AM

Downloaded n3220 working draft.

Problem is not your English - it is the inconsistency in the proposed spec.

Sections 7.18.3 through 7.18.6 clearly indicate the direction to 'count' from. 'Leading' is from MSB to LSB,
'Trailing' is from LSB to MSB these are specifically spelled out in each of these sections under item #2.

However

Sections 7.18.7 through 7.18.12 drop the clarity. They seem to assume that everyone will guess "Leading" always means counting from MSB to LSB, and "Trailing" always means counting from LSB to MSB but do not ever specifically say so as in the previous sections.

Also have to be careful where some times use index as in Bit[0] - Bit[15] verses position Bit[1] - Bit[16]. or they say index +1 which is position or using w-1 which would be index  different authors I'm guessing.

IMO -

John Z

#62

Feature requests / Re: Enhanced editor suggestion

Last post by Pelle - March 27, 2026, 08:05:20 PM

It would be helpful to me if the editor would show which #ifdef/#else/#endif paths were active.  This might be done by highlighting, or not, the appropriate code sections.  Sometime I run into multiple, nested #ifdef's and sorting it all out is a big pain.  Thanks.

I actually would want this too, and have invested some time investigating this in the past. The problem is that it's not trivial to do accurate and fast enough. Inaccurate is unhelpful, and waiting on the editor is useless.

#63

Beginner questions / Re: same code pelles c and gcc...

Last post by Pelle - March 27, 2026, 07:58:36 PM

gcc is multitarget compiler and see things in that way.
memory layout can be different in little-endian / big-endian things ?

Yes, but these functions should operate on the loaded value, disregarding the memory byte-order.
I would like a second opinion to GCC, but few compilers seems to care about C23 in general, and <stdbit.h> especially...

#64

Beginner questions / Re: same code pelles c and gcc...

Last post by TimoVJL - March 27, 2026, 07:44:02 PM

gcc is multitarget compiler and see things in that way.
memory layout can be different in little-endian / big-endian things ?

[n3220.pdf]

#65

Beginner questions / Re: same code pelles c and gcc...

Last post by Pelle - March 27, 2026, 07:16:45 PM

This is from the C23 draft n3220.pdf (since I will never waste money on the real C23 standard; I don't know if the draft differs from the final version):

The most significant index is the 0-based index counting from the most significant bit, 0, to the least significant bit, w − 1, where w is the width of the type that is having its most significant index computed.

The least significant index is the 0-based index counting from the least significant bit, 0, to the most significant bit, w − 1, where w is the width of the type that is having its least significant index computed.

First Leading Zero
Returns the most significant index of the first 0 bit in value, plus 1. If it is not found, this function returns 0.

First Leading One
Returns the most significant index of the first 1 bit in value, plus 1. If it is not found, this function returns 0.

What the <beep> <beep> <beep> are they actually saying here?! Can someone with better English skills than mine explain: from which direction is what counted...?

#66

Bug reports / Re: TEXTEQU statement freezing...

Last post by Pelle - March 27, 2026, 05:13:39 PM

MessageBoxA TEXTEQU <MessageBoxA> is not meaningful but this should not lock the assembler.

I agree, but not trivial to detect the way this is implemented.
I will have to think about it...

[MOVBE]

#67

Announcements / Re: Release Candidate #1 for v...

Last post by Pelle - March 27, 2026, 05:02:16 PM

Thank you all!

( I got side-tracked hunting down an elusive ARM64 bug )

The MOVBE support isn't essential. I can' live without it. Seems like less hassle to simple comment out the eight code generator rules producing this instruction.

I will rebuild everything (as usual) for Release Candidate #2. I need a few days for this.

#68

Announcements / Re: Release Candidate #1 for v...

Last post by Vortex - March 27, 2026, 12:33:03 PM

Attached is a simple GUI built with Pelles C V14 RC1. Can be Useful to test the movbe issue.

#69

Announcements / Re: Release Candidate #1 for v...

Last post by John Z - March 27, 2026, 11:37:20 AM

Thanks Timo,

If project build as stdcall, it didn't crash.

So the problem/issue or bug is with _fastcall in V14 acting differently from V13.

Appreciation,

John Z

#70

Announcements / Re: Release Candidate #1 for v...

Last post by John Z - March 27, 2026, 11:34:39 AM

Thanks Michele

I had a similar problem, the cause was an addin that increments the build number at each compilation.

You nailed it in one!  Seems the V14_RC1 did not include Timo's update for that Add-In.
Disabling it fix that issue.

Thanks,
John Z