On Sun, 27 Sep 2020, Rong Chen wrote: > Hi Nicolas, > > Thanks for the feedback, the error still remains with gcc 10.2.0:
I've created the simplest test case that can be. You won't believe it. Test case: $ cat test.c unsigned int test(unsigned int x, unsigned long long y) { y /= 0x20000000; if (x > 1) y *= x; return y; } $ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:~/0day/gcc-9.3.0-nolibc/arc-elf/libexec/gcc/arc-elf/9.3.0 $ ~/0day/gcc-9.3.0-nolibc/arc-elf/bin/arc-elf-gcc -mcpu=hs38 -mbig-endian -O2 -c test.c /tmp/cc0GAomh.s: Assembler messages: /tmp/cc0GAomh.s:21: Error: inappropriate arguments for opcode 'mpydu' I know nothing about ARC. Please anyone take it over from here. Nicolas