https://sourceware.org/bugzilla/show_bug.cgi?id=25438
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=be4c5e58bdc839898739e0332aee84abf6e5299a commit be4c5e58bdc839898739e0332aee84abf6e5299a Author: H.J. Lu <hjl.to...@gmail.com> Date: Wed Jan 22 09:24:14 2020 -0800 x86: Always disallow double word suffix with word general register In 64-bit mode, double word suffix in mnemonic with word general register is disallowed. Otherwise, assembler gives a warning: $ cat /tmp/x.s movl %ax, %bx movl %ds, %ax movl %ax, %cs $ gcc -c /tmp/x.s /tmp/x.s: Assembler messages: /tmp/x.s:1: Error: incorrect register `%bx' used with `l' suffix /tmp/x.s:2: Error: incorrect register `%ax' used with `l' suffix /tmp/x.s:3: Error: incorrect register `%ax' used with `l' suffix $ gcc -c /tmp/x.s -m32 /tmp/x.s: Assembler messages: /tmp/x.s: Assembler messages: /tmp/x.s:1: Warning: using `%ebx' instead of `%bx' due to `l' suffix /tmp/x.s:1: Warning: using `%eax' instead of `%ax' due to `l' suffix /tmp/x.s:2: Warning: using `%eax' instead of `%ax' due to `l' suffix /tmp/x.s:3: Warning: using `%eax' instead of `%ax' due to `l' suffix This patch makes it a hard error in all modes. Now we get: $ gcc -c /tmp/x.s -m32 /tmp/x.s: Assembler messages: /tmp/x.s:1: Error: incorrect register `%bx' used with `l' suffix /tmp/x.s:2: Error: incorrect register `%ax' used with `l' suffix /tmp/x.s:3: Error: incorrect register `%ax' used with `l' suffix PR gas/25438 * config/tc-i386.c (check_long_reg): Always disallow double word suffix in mnemonic with word general register. * testsuite/gas/i386/general.s: Replace word general register with double word general register for movl. * testsuite/gas/i386/inval.s: Add tests for movl with word general register. * testsuite/gas/i386/general.l: Updated. * testsuite/gas/i386/inval.l: Likewise. -- You are receiving this mail because: You are on the CC list for the bug.
