ee-gcc (PSX2 GCC) compiler bug (fwd)

[Denis Fabrice]

Hello,

I would like to report a bug concerning the playstation2 development kit
port of DJGPP.

I am a new programmer so I haven't much details about the products but
basically I was said you have developed the compiler for Sony's
playstation2 devkit.

The compiler we use is named 'ee-gcc'.

I came upon a situation where a pointer is not increased as it should be.

Here is a piece of code that works:

    int pts[4*3];
    int *ppts = pts;

    *ppts++ = RGBA2COL(100,0,0,127);    //just some macro..
    *ppts++ = windowLeft()+50;         // some other macros..
    *ppts++ = windowTop()+20;

    // here the ppts pointer is correctly increased by 12 bytes

I changed the code then to use some math functions,
 the following code does _not_ work:


    int pts[4*3];
    int *ppts = pts;
    int rgba;

   < .... >

	printf("Argh %x %x\n", pts, ppts);
    *ppts++ = rgba;
    *ppts++ = cosf( DEG2RAD(ang2) ) * xradi1;
    *ppts++ = sinf( DEG2RAD(ang2) ) * yradi1;
	printf("Argh %x %x\n", pts, ppts);

The output revealed that ppts is increased by _4_, not by 12.
(so it increases correctly for the line with 'rgba', but not on the
lines with the math functions)

However, if I change the code so that ppts is increased on a separate
line, it works:

    *ppts++ = rgba;
    *ppts = cosf( DEG2RAD(ang2) ) * xradi1;
    ppts++;
    *ppts = sinf( DEG2RAD(ang2) ) * yradi1;
    ppts++;

So, it looks like the pointer arithmetic gets faulty when cosf / sinf is
used.

This is the code I am currently using to fix the problem.

This is the declaration of the macro:

    #define DEG2RAD(a) ((a)*PI/180.0f)

This is the declaration of the math functions in math.h:
( /usr/local/sce/ee/gcc/ee/include/math.h )

    extern float cosf _PARAMS((float));
    extern float sinf _PARAMS((float));


The following code does work:

    *ppts++ = rgba;
    *ppts++ = 4.0f;  //cosf(DEG2RAD(ang1))*xradi1;
    *ppts++ = 4.0f;  //sinf(DEG2RAD(ang1))*yradi1;

... as I was testing another variation, the compiler got an internal
error with this code:

    *ppts++ = rgba;
    *ppts++ = cosf(1.1f);
    *ppts++ = sinf(1.2f);

Here is the output:
-------------------------------------------------------------------------------

red> make
-- tool1/tool1.c --
tool1/tool1.c: In function `move_prop':
tool1/tool1.c:197: warning: unused variable `vel'
tool1/tool1.c: In function `drawsection':
tool1/tool1.c:630: warning: unsigned int format, pointer arg (arg 2)
tool1/tool1.c:630: warning: unsigned int format, pointer arg (arg 3)
../../src/gcc/emit-rtl.c:2486: Internal compiler error in function
add_insn_before
Please submit a Problem Report to Cygnus Solutions with send-pr.
make: *** [tool1/tool1.o] Error 1
red> 

-------------------------------------------------------------------------------

I have no idea is this might be useful to you:

red> ee-gcc -print-libgcc-file-name

/usr/local/sce/ee/gcc/lib/gcc-lib/ee/2.9-ee-990721/libgcc.a


To be honest the send-pr program looks like a lot of trouble, I
hope you have enough information here. However, if you need any
additional detail I will be pleased to help you.



Regards,
Denis Fabrice

dfabrice@frd.co.uk