Am 19.11.21 um 10:39 schrieb Christian Borntraeger:
Am 19.11.21 um 02:10 schrieb Nick Desaulniers:
On Wed, Nov 17, 2021 at 9:48 AM Ilie Halip <ilie.halip@xxxxxxxxx> wrote:
Building with clang & LLVM_IAS=1 leads to an error:
arch/s390/lib/test_unwind.c:179:4: error: invalid register pair
" mvcl %%r1,%%r1\n"
^
The test creates an invalid instruction that would trap at runtime, but the
LLVM inline assembler tries to validate it at compile time too.
Use the raw instruction opcode instead.
Link: https://github.com/ClangBuiltLinux/linux/issues/1421
Reported-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Signed-off-by: Ilie Halip <ilie.halip@xxxxxxxxx>
Ilie, thanks for the patch!
So if I understand
https://sourceware.org/binutils/docs/as/s390-Directives.html#s390-Directives
https://sourceware.org/binutils/docs/as/s390-Formats.html
that `e,` prefix is for 16B opcodes?
e is an instruction format as specified by the architecture.
See http://publibfp.dhe.ibm.com/epubs/pdf/a227832c.pdf
(page 5-3 for the instruction formats and page 7-289 for MVCL)
