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Hi, >this may be a bug in the m68k machine description for gcc. > >In order to confirm it, can you please re-run your compile and link >commands, but add the option '-v' to the each of the command lines, to >generate a verbose listing of the compiler's activity; and then please >post the output to the list. I have compiled and linked with the -v option now: D:\GCC-TEST>gcc -g -v -b 68k -mcpu32 -mshort -mrtd -c -O1 -o test.o test.c Reading specs from d:/xgcc/68k/2_8_1/specs gcc driver version 2.8.1 executing gcc version egcs-2.90.29 d:/xgcc/68k/2_8_1/cpp.exe -lang-c -v -iprefix d:/xgcc/68k/2_8_1/ -undef -D__GNUC__=2 -D__GNUC_MINOR__=90 -Dmc68000 -D__embedded__ -D__mc68000__ -D__embedded__ -D__mc68000 -Asystem(embedded) -Amachine(mc68000) -D__OPTIMIZE__ -g -D__INT_MAX__=32767 -Dmcpu32 -D__mcpu32__ -D__mcpu32 test.c d:/xgcc/tmp/ccaaaaaa.i GNU CPP version egcs-2.90.29 980515 (egcs-1.0.3 release) (68k, Motorola syntax) #include "..." search starts here: #include <...> search starts here: d:/xgcc/68k/2_8_1/include End of search list. d:/xgcc/68k/2_8_1/cc1.exe d:/xgcc/tmp/ccaaaaaa.i -quiet -dumpbase test.c -mcpu32 -mshort -mrtd -g -O1 -version -o d:/xgcc/tmp/ccaaaaaa.s GNU C version egcs-2.90.29 980515 (egcs-1.0.3 release) (68k) compiled by GNU C version 2.8.1. test.c: In function `main': test.c:4: warning: return type of `main' is not `int' d:/xgcc/68k/2_8_1/as.exe -mcpu32 -o test.o d:/xgcc/tmp/ccaaaaaa.s D:\GCC-TEST>gcc -g -v -b 68k -mcpu32 -mshort -mrtd -o test.cof test.o -Ttest.ld Reading specs from d:/xgcc/68k/2_8_1/specs gcc driver version 2.8.1 executing gcc version egcs-2.90.29 d:/xgcc/68k/2_8_1/ld.exe -o test.cof d:/xgcc/68k/2_8_1/mshort/mrtd/mcpu32/crt0.o -Ld:/xgcc/68k/2_8_1/mshort/mrtd/mcpu32 -Ld:/xgcc/68k/2_8_1 -Ld:/xgcc test.o -lgcc -lgcc -Ttest.ld Here's the relevant part of the generated code: 00030026 <main>: double main(int i){ 30026: 4e56 ffe0 linkw %fp,#-32 3002a: 48e7 3020 moveml %d2-%d3/%a2,%sp@- 3002e: 346e 0008 moveaw %fp@(8),%a2 30032: 4eb9 0003 0006 jsr 30006 <__main> double d; char ch[30]; d = (double)i; 30038: 344a moveaw %a2,%a2 3003a: 2f0a movel %a2,%sp@- 3003c: 4eb9 0003 006c jsr 3006c <__floatsidf> 30042: 588f addql #4,%sp 30044: 2400 movel %d0,%d2 30046: 2601 movel %d1,%d3 strcpy(&ch[0], "Just some string for testing"); 30048: 3f3c 001d movew #29,%sp@- 3004c: 486e ffe2 pea %fp@(-30) 30050: 487a ffb6 pea %pc@(30008 <.text>) 30054: 4eb9 0003 0280 jsr 30280 <bcopy> return d; 3005a: 2002 movel %d2,%d0 3005c: 2203 movel %d3,%d1 } 3005e: 4cee 040c ffd4 moveml %fp@(-44),%d2-%d3/%a2 30064: 4e5e unlk %fp 30066: 4e74 0002 rtd #2 0003006c <__floatsidf>: 3006c: 4e56 0000 linkw %fp,#0 .... 300e6: 4e5e unlk %fp 300e8: 4e74 0004 rtd #4 00030280 <bcopy>: 30280: 4e56 0000 linkw %fp,#0 30284: 2f2e 0010 movel %fp@(16),%sp@- 30288: 2f2e 0008 movel %fp@(8),%sp@- 3028c: 2f2e 000c movel %fp@(12),%sp@- 30290: 4eb9 0003 029c jsr 3029c <memmove> 30296: 4e5e unlk %fp 30298: 4e74 000c rtd #12 The problems: Argument for __floatsidf is popped twice (-mtrd problem): 30042: 588f addql #4,%sp 300e8: 4e74 0004 rtd #4 This problem occurrs for all fp conversion functions. The size of the 'number of characters' argument for bcopy differs (-mshort problem): 30048: 3f3c 001d movew #29,%sp@- 30284: 2f2e 0010 movel %fp@(16),%sp@- 30298: 4e74 000c rtd #12 Arjan Koers. _______________________________________________ New CrossGCC FAQ: http://www.objsw.com/CrossGCC _______________________________________________ To remove yourself from the crossgcc list, send mail to crossgcc-request@cygnus.com with the text 'unsubscribe' (without the quotes) in the body of the message.