Re: [avr-gcc-list] Success running the testsuite with avrtest

[Dmitry K.]

Hi Paulo, hi all.

Very good work!

Possible, you are work with 4.2.2 ?
And is it possible to apply yours 'avrtest' to
avr-gcc 4.1.2 version?

I have try quickly, results are strange: unexpected
abort in both small programs (avr-gcc 4.1.2, -Os,
-mmcu=atmega128).
Below are both programs with compiler listing.

Regards,
Dmitry.

----------------------------------------------------------
#define ABORT_PORT      0x49
#define abort()         do { *(volatile char *)ABORT_PORT = 0; } while (0)

int main ()
{
    volatile unsigned char a = 1, b = 255;
    unsigned char c;

    if ((c = a + b) != 0) abort ();
    return 0;
}
----------------------------------------------------------
        .file   "add.c"
__SREG__ = 0x3f
__SP_H__ = 0x3e
__SP_L__ = 0x3d
__tmp_reg__ = 0
__zero_reg__ = 1
        .global __do_copy_data
        .global __do_clear_bss
        .text
.global main
        .type   main, @function
main:
/* prologue: frame size=2 */
        ldi r28,lo8(__stack - 2)
        ldi r29,hi8(__stack - 2)
        out __SP_H__,r29
        out __SP_L__,r28
/* prologue end (size=4) */
        ldi r24,lo8(1)
        std Y+1,r24
        ldi r24,lo8(-1)
        std Y+2,r24
        ldd r25,Y+1
        ldd r24,Y+2
        add r24,r25
        breq .L2
        out 73-0x20,__zero_reg__
.L2:
        ldi r24,lo8(0)
        ldi r25,hi8(0)
/* epilogue: frame size=2 */
        jmp exit
/* epilogue end (size=2) */
/* function main size 18 (12) */
        .size   main, .-main
/* File "add.c": code   18 = 0x0012 (  12), prologues   4, epilogues   2 */


---------------------------------------------------------------
#define ABORT_PORT      0x49
#define abort()         do { *(volatile char *)ABORT_PORT = 0; } while (0)

int main ()
{
    volatile int a = 2, b = 1;

    if (a == b) abort ();
    return 0;
}
---------------------------------------------------------------
        .file   "cmp.c"
        .arch atmega128
__SREG__ = 0x3f
__SP_H__ = 0x3e
__SP_L__ = 0x3d
__tmp_reg__ = 0
__zero_reg__ = 1
        .global __do_copy_data
        .global __do_clear_bss
        .text
.global main
        .type   main, @function
main:
/* prologue: frame size=4 */
        ldi r28,lo8(__stack - 4)
        ldi r29,hi8(__stack - 4)
        out __SP_H__,r29
        out __SP_L__,r28
/* prologue end (size=4) */
        ldi r24,lo8(1)
        ldi r25,hi8(1)
        std Y+2,r25
        std Y+1,r24
        ldi r24,lo8(2)
        ldi r25,hi8(2)
        std Y+4,r25
        std Y+3,r24
        ldd r18,Y+1
        ldd r19,Y+2
        ldd r24,Y+3
        ldd r25,Y+4
        cp r18,r24
        cpc r19,r25
        brne .L2
        out 73-0x20,__zero_reg__
.L2:
        ldi r24,lo8(0)
        ldi r25,hi8(0)
/* epilogue: frame size=4 */
        jmp exit
/* epilogue end (size=2) */
/* function main size 24 (18) */
        .size   main, .-main
/* File "cmp.c": code   24 = 0x0018 (  18), prologues   4, epilogues   2 */