bob@cis.ohio-state.edu (Bob Sutterfield) (06/28/89)
Date: Tue, 27 Jun 89 10:47:23 -0700
From: wilson@ucbarpa.Berkeley.EDU (James E. Wilson)
From: bob@tinman.cis.ohio-state.edu (Bob Sutterfield)
Date: 27 Jun 89 15:26:57 GMT
Newsgroups: gnu.gcc.bug
GNU CC 1.35 Sun3/OS3.5.1 no
-g no
-O const & double OK, float bad
-O -g const & double OK, float bad
I tried the same test on my Sun 3/50, running somewhere about
OS3.4, and had no problems. All of the above cases worked for me.
Perhaps there is something different in your environment that is
causing the problem?
Some additional info that would help solve the problem:
1) Do you still get errors after fixing the bugs in the program?
Note that the first two printf statements should be "le" and
"lf" respectively, instead of "e" and "f". This error could be
messing up the stack, or confusing your printf routine.
2) What is the assembly produced by the compiler? Looking at the
assembly output is the only way to prove that the compiler is a
fault.
3) What is the output produced by -v? Namely, what assembler/ld
are you using? Was gcc compiled by itself? If you are using
GAS, maybe it is a bug in GAS?
Here's the info you wanted, in the form of a dreaded monster
typescript. I haven't read much assembly code since the Z80/6800 era,
so I won't be much use in figuring stuff out at this level.
Our GAS is "Gnu assembler version 1.33 (I guess.)". Karl got 1.34
while I was out of town, and I didn't notice it had arrived. Our GLD
is even older, dated 14 Sep 1988 - similarly, I've been remiss in not
installing the 5 April version. I'll get around to installing them
both Real Soon Now, and see if that makes a difference.
Script started on Tue Jun 27 14:06:20 1989
2:06pm> cat test2.c
/*
This is a test for floating point arithmetic
by Douglas Yarrington (yarringt@cis.ohio-state.edu)
(with a couple of printf nits changed)
*/
#include <stdio.h>
main()
{
double test;
float test1;
test = 3.1415;
printf("%4.3le\n",3.1415 );
printf("%lf\n", test );
test1 = 3.1415;
printf("%f\n", test1 );
}
2:06pm> gcc -v -S -g test2.c
gcc version 1.35
/usr/local/lib/gcc-cpp -v -undef -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 test2.c /tmp/cca12828.cpp
GNU CPP version 1.35
/usr/local/lib/gcc-cc1 /tmp/cca12828.cpp -quiet -dumpbase test2.c -g -version -o test2.s
GNU C version 1.35 (68k, MIT syntax) compiled by GNU C version 1.35.
2:06pm> cat test2.s
#NO_APP
gcc_compiled.:
.stabs "test2.c",100,0,0,Ltext
Ltext:
.stabs "int:t1=r1;-2147483648;2147483647;",128,0,0,0
.stabs "char:t2=r2;0;127;",128,0,0,0
.stabs "long int:t3=r1;-2147483648;2147483647;",128,0,0,0
.stabs "unsigned int:t4=r1;0;-1;",128,0,0,0
.stabs "long unsigned int:t5=r1;0;-1;",128,0,0,0
.stabs "short int:t6=r1;-32768;32767;",128,0,0,0
.stabs "long long int:t7=r1;0;-1;",128,0,0,0
.stabs "short unsigned int:t8=r1;0;65535;",128,0,0,0
.stabs "long long unsigned int:t9=r1;0;-1;",128,0,0,0
.stabs "signed char:t10=r1;-128;127;",128,0,0,0
.stabs "unsigned char:t11=r1;0;255;",128,0,0,0
.stabs "float:t12=r1;4;0;",128,0,0,0
.stabs "double:t13=r1;8;0;",128,0,0,0
.stabs "long double:t14=r1;8;0;",128,0,0,0
.stabs "void:t15=15",128,0,0,0
.text
.even
LC0:
.double 0r3.14150000000000020000e+00
LC1:
.ascii "%4.3le\12\0"
LC2:
.ascii "%lf\12\0"
.even
LC3:
.single 0r3.14150000000000020000e+00
LC4:
.ascii "%f\12\0"
.even
.globl _main
_main:
.stabd 68,0,9
link a6,#-12
LBB2:
.stabd 68,0,13
movel LC0,a6@(-8)
movel LC0+4,a6@(-4)
.stabd 68,0,14
movel LC0+4,sp@-
movel LC0,sp@-
pea LC1
jbsr _printf
.stabd 68,0,15
movel a6@(-4),sp@-
movel a6@(-8),sp@-
pea LC2
jbsr _printf
.stabd 68,0,16
movel LC3,a6@(-12)
.stabd 68,0,17
fmoves a6@(-12),fp0
fmoved fp0,sp@-
movel sp@+,d0
movel sp@+,d1
movel d1,sp@-
movel d0,sp@-
pea LC4
jbsr _printf
LBE2:
.stabd 68,0,18
L1:
unlk a6
rts
.stabs "_iobuf:T16=s20_cnt:1,0,32;_ptr:17=*11,32,32;\\",128,0,0,0
.stabs "_base:17,64,32;_bufsiz:1,96,32;_flag:6,128,16;\\",128,0,0,0
.stabs "_file:2,144,8;;",128,0,0,0
.stabs "main:F1",36,0,0,_main
.stabs "test:13",128,0,0,-8
.stabs "test1:12",128,0,0,-12
.stabn 192,0,0,LBB2
.stabn 224,0,0,LBE2
2:06pm> gcc -O -v -S -g test2.c
gcc version 1.35
/usr/local/lib/gcc-cpp -v -undef -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__OPTIMIZE__ -D__HAVE_68881__ -Dmc68020 test2.c /tmp/cca12832.cpp
GNU CPP version 1.35
/usr/local/lib/gcc-cc1 /tmp/cca12832.cpp -quiet -dumpbase test2.c -g -O -version -o test2.s
GNU C version 1.35 (68k, MIT syntax) compiled by GNU C version 1.35.
2:06pm> cat test2.s
#NO_APP
gcc_compiled.:
.stabs "test2.c",100,0,0,Ltext
Ltext:
.stabs "int:t1=r1;-2147483648;2147483647;",128,0,0,0
.stabs "char:t2=r2;0;127;",128,0,0,0
.stabs "long int:t3=r1;-2147483648;2147483647;",128,0,0,0
.stabs "unsigned int:t4=r1;0;-1;",128,0,0,0
.stabs "long unsigned int:t5=r1;0;-1;",128,0,0,0
.stabs "short int:t6=r1;-32768;32767;",128,0,0,0
.stabs "long long int:t7=r1;0;-1;",128,0,0,0
.stabs "short unsigned int:t8=r1;0;65535;",128,0,0,0
.stabs "long long unsigned int:t9=r1;0;-1;",128,0,0,0
.stabs "signed char:t10=r1;-128;127;",128,0,0,0
.stabs "unsigned char:t11=r1;0;255;",128,0,0,0
.stabs "float:t12=r1;4;0;",128,0,0,0
.stabs "double:t13=r1;8;0;",128,0,0,0
.stabs "long double:t14=r1;8;0;",128,0,0,0
.stabs "void:t15=15",128,0,0,0
.text
LC0:
.ascii "%4.3le\12\0"
LC1:
.ascii "%lf\12\0"
LC2:
.ascii "%f\12\0"
.even
.globl _main
_main:
.stabd 68,0,9
link a6,#0
moveml #0x3020,sp@-
LBB2:
.stabd 68,0,13
movel #1074340298,d2
movel #-1065151889,d3
.stabd 68,0,14
movel d3,sp@-
movel d2,sp@-
pea LC0
lea _printf,a2
jbsr a2@
.stabd 68,0,15
movel d3,sp@-
movel d2,sp@-
pea LC1
jbsr a2@
.stabd 68,0,16
.stabd 68,0,17
fmoves #0r3.1415,fp0
fmoved fp0,sp@-
pea LC2
jbsr a2@
LBE2:
.stabd 68,0,18
moveml a6@(-12),#0x40c
unlk a6
rts
.stabs "_iobuf:T16=s20_cnt:1,0,32;_ptr:17=*11,32,32;\\",128,0,0,0
.stabs "_base:17,64,32;_bufsiz:1,96,32;_flag:6,128,16;\\",128,0,0,0
.stabs "_file:2,144,8;;",128,0,0,0
.stabs "main:F1",36,0,0,_main
.stabs "test:r13",64,0,0,2
.stabn 192,0,0,LBB2
.stabn 224,0,0,LBE2
2:13pm> gcc -O -v -g -o test2-gccOg test2.c
gcc version 1.35
/usr/local/lib/gcc-cpp -v -undef -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__OPTIMIZE__ -D__HAVE_68881__ -Dmc68020 test2.c /tmp/cca12844.cpp
GNU CPP version 1.35
/usr/local/lib/gcc-cc1 /tmp/cca12844.cpp -quiet -dumpbase test2.c -g -O -version -o /tmp/cca12844.s
GNU C version 1.35 (68k, MIT syntax) compiled by GNU C version 1.35.
/usr/local/lib/gcc-as -mc68020 -o test2.o /tmp/cca12844.s
/usr/local/lib/gcc-ld -o test2-gccOg /lib/crt0.o /lib/Mcrt1.o test2.o /usr/local/lib/gcc-gnulib -lg -lc
2:14pm> ./test2-gccOg
3.142e+00
3.141500
0.000000
2:14pm> gcc -v -g -o test2-gccg test2.c
gcc version 1.35
/usr/local/lib/gcc-cpp -v -undef -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 test2.c /tmp/cca12850.cpp
GNU CPP version 1.35
/usr/local/lib/gcc-cc1 /tmp/cca12850.cpp -quiet -dumpbase test2.c -g -version -o /tmp/cca12850.s
GNU C version 1.35 (68k, MIT syntax) compiled by GNU C version 1.35.
/usr/local/lib/gcc-as -mc68020 -o test2.o /tmp/cca12850.s
/usr/local/lib/gcc-ld -o test2-gccg /lib/crt0.o /lib/Mcrt1.o test2.o /usr/local/lib/gcc-gnulib -lg -lc
2:14pm> ./test2-gccg
0.000e+00
0.000000
0.000000
2:14pm> exit
script done on Tue Jun 27 14:14:47 1989bob@cis.ohio-state.edu (Bob Sutterfield) (06/28/89)
Date: Tue, 27 Jun 89 15:10:28 EDT From: hack@gnu.ai.mit.edu (Jay Fenlason) Get gas version 1.34, and compile it WITHOUT USING GAS1.33. Gas1.33 has a floating point bug in it. Sure enough, that was the problem on the Sun. Thanks!