FlexGui P2ASM Local Labels

Comments

• ersmith Posts: 5,910

  2020-01-14 17:51

  Yes, FlexC allows local labels, using whatever form (colon or dot) is appropriate for the processor being compiled for (colon for P1, dot for P2). For example:

  #include <propeller2.h>
  
  __pasm {
  entry
      nop
  .somelocal
      dirnot #56
      waitx ##20_000_000
      jmp #.somelocal
  bar
  }
  
  int main () {
  
     _cognew(&entry, 0);
     for(;;)
         ;
     return(0);
  } 
  
• MSwann Posts: 20

  2020-01-14 18:33

  Thanks @ersmith.
• MSwann Posts: 20

  2020-01-14 22:24

  @ersmith,
  
  Now local labels don't work. I get the following messages.

  "C:/tools/PropellerTools/flexgui/bin/fastspin" -2 -l -O1 -I "C:/Projects/Prop2Test/flexgui/include"  "C:/Projects/Prop2Posit/PositTest.c"
  Propeller Spin/PASM Compiler 'FastSpin' (c) 2011-2019 Total Spectrum Software Inc.
  Version 4.0.5 Compiled on: Dec 19 2019
  PositTest.c
  Posit32es2.p2asm:664: error: syntax error, unexpected constant
  Posit32es2.p2asm:672: error: syntax error, unexpected '.'
  Posit32es2.p2asm:676: error: syntax error, unexpected '.'
  child process exited abnormally
  Finished at Tue Jan 14 14:13:19 2020
  

  
  Code follows:

  659                     mov     temp1,#quire_msw
  660                     sets    .0,temp1
  661                     mov     cntr1,#16
  662                     mov     k_expA,#271
  663
  664     .0              mov     frac64Ah,#0 wz
  665             if_z    sub     temp1,#1
  666             if_z    sets    .0,temp1
  667             if_z    sub     k_expA,#32
  668             if_z    djnz    cntr1,#.0
  669
  670                     ' Copy next 2 words to frac64A l and x
  671
  672                     sets    .A1,temp1
  673                     sub     temp1,#1
  674                     sets    .2,temp1
  675
  676     .A1             mov     frac64Al,frac64Al
  677     .2              mov     frac64Ax,frac64Ax
  
• ersmith Posts: 5,910

  2020-01-14 22:42

  Ah, I see: it doesn't like ".0" and ".2" (it wants the local labels to start with a letter or underscore). Does PNut allow local labels to start with a digit? I'd kind of be surprised if it does, those look like floating point numbers, but I'll go along with whatever Chip does.
  
• MSwann Posts: 20

  2020-01-14 22:51 edited 2020-01-14 22:55

  ersmith wrote: »

  Ah, I see: it doesn't like ".0" and ".2" (it wants the local labels to start with a letter or underscore). Does PNut allow local labels to start with a digit? I'd kind of be surprised if it does, those look like floating point numbers, but I'll go along with whatever Chip does.

  I changed all labels to DOT-ALPHA. Here are the results

  "C:/tools/PropellerTools/flexgui/bin/fastspin" -2 -l -O1 -I "C:/Projects/Prop2Test/flexgui/include"  "C:/Projects/Prop2Posit/PositTest.c"
  Propeller Spin/PASM Compiler 'FastSpin' (c) 2011-2019 Total Spectrum Software Inc.
  Version 4.0.5 Compiled on: Dec 19 2019
  PositTest.c
  Posit32es2.p2asm:660: error: syntax error, unexpected '.'
  Posit32es2.p2asm:664: error: syntax error, unexpected '.'
  Posit32es2.p2asm:666: error: syntax error, unexpected '.'
  Posit32es2.p2asm:668: error: syntax error, unexpected '.'
  Posit32es2.p2asm:672: error: syntax error, unexpected '.'
  Posit32es2.p2asm:674: error: syntax error, unexpected '.'
  child process exited abnormally
  Finished at Tue Jan 14 14:47:03 2020
  

  
  Code follows:

  659                     mov     temp1,#quire_msw
  660                     sets    .A,temp1
  661                     mov     cntr1,#16
  662                     mov     k_expA,#271
  663
  664     .A              mov     frac64Ah,#0 wz
  665             if_z    sub     temp1,#1
  666             if_z    sets    .A,temp1
  667             if_z    sub     k_expA,#32
  668             if_z    djnz    cntr1,#.A
  669
  670                     ' Copy next 2 words to frac64A l and x
  671
  672                     sets    .B,temp1
  673                     sub     temp1,#1
  674                     sets    .C,temp1
  675
  676     .B              mov     frac64Al,frac64Al
  677     .C              mov     frac64Ax,frac64Ax
  
• ersmith Posts: 5,910

  2020-01-14 22:54

  Something weird is definitely going on, I was sure that I compiled and ran the program I posted earlier, but now I can't. I must have mixed up compiler versions or something. Sorry about that, I'll look into it. There must be a conflict between the C parser and the Spin parser in __pasm blocks.
  
• ersmith Posts: 5,910

  2020-01-14 23:04

  OK, the bug seems to be in handling any single character local label in C code in P2 mode; a little specific and I missed it. Basically local labels have to start with two letters or underscores to be properly recognized in fastspin 4.0.x. It'll be fixed in 4.1.0.