[Bug target/115058] New: on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[Bug target/115058] New: on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

            Bug ID: 115058
           Summary: on target arm -mcpu=cortex-a78ae does not allow use
                    pauth and dot product
           Product: gcc
           Version: 12.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yanxiaoyong5 at gmail dot com
  Target Milestone: ---

my gcc version is:
COLLECT_GCC=aarch64-none-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/root/samba/ssdk/prebuilts/arm-gnu-toolchain-12.2.rel1-x86_64-aarch64-none-linux-gnu/bin/../libexec/gcc/aarch64-none-linux-gnu/12.2.1/lto-wrapper
目标：aarch64-none-linux-gnu
配置为：/data/jenkins/workspace/GNU-toolchain/arm-12/src/gcc/configure
--target=aarch64-none-linux-gnu --prefix=
--with-sysroot=/aarch64-none-linux-gnu/libc
--with-build-sysroot=/data/jenkins/workspace/GNU-toolchain/arm-12/build-aarch64-none-linux-gnu/install//aarch64-none-linux-gnu/libc
--with-bugurl=https://bugs.linaro.org/ --enable-gnu-indirect-function
--enable-shared --disable-libssp --disable-libmudflap --enable-checking=release
--enable-languages=c,c++,fortran
--with-gmp=/data/jenkins/workspace/GNU-toolchain/arm-12/build-aarch64-none-linux-gnu/host-tools
--with-mpfr=/data/jenkins/workspace/GNU-toolchain/arm-12/build-aarch64-none-linux-gnu/host-tools
--with-mpc=/data/jenkins/workspace/GNU-toolchain/arm-12/build-aarch64-none-linux-gnu/host-tools
--with-isl=/data/jenkins/workspace/GNU-toolchain/arm-12/build-aarch64-none-linux-gnu/host-tools
--enable-fix-cortex-a53-843419 --with-pkgversion='Arm GNU Toolchain 12.2.Rel1
(Build arm-12.24)'
线程模型：posix
Supported LTO compression algorithms: zlib
gcc 版本 12.2.1 20221205 (Arm GNU Toolchain 12.2.Rel1 (Build arm-12.24))

The TRM (Technical Reference Manual) for Cortex-A78AE states that Cortex-A78AE
supports PAuth and Dot-Product.
Armv8.4-A Dot Product instruction support
Armv8.3-A Pointer Authentication support

but when I use -mcpu=cortex-a78ae, Dot Product and Pointer authentication is
not supported.
Dot Product:
105: Error: selected processor does not support `sdot v19.4s,v2.16b,v3.16b'

Pointer authentication:
Error: selected processor does not support system register name 'apiakeyhi_el1'

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2024-05-13

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
It looks like those messages are coming from the assembler, not the compiler,
but without a testcase it's difficult to be exactly sure what your problem is.

Please attach a small program that demonstrates your problem and state the 
/exact/ command line you used.

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #2 from xiaoyong yan <yanxiaoyong5 at gmail dot com> ---
(In reply to Richard Earnshaw from comment #1)
> It looks like those messages are coming from the assembler, not the
> compiler, but without a testcase it's difficult to be exactly sure what your
> problem is.
> 
> Please attach a small program that demonstrates your problem and state the 
> /exact/ command line you used.

Hi Richard:
   thanks for reply.
   here is the test file for pauth, named as test.S:
   align 8
   .global test
   .type test,%function
   test:
        mrs             x9, apiakeyhi_el1      
        mrs             x10, apiakeylo_el1
        mov             x11, lr
        mov             x12, sp

   when I use "aarch64-none-linux-gnu-gcc -mcpu=cortex-a78ae test.S -o test.o",
gcc generates errors as follows:
   test.S: Assembler messages:
test.S:5: Error: selected processor does not support system register name
'apiakeyhi_el1'
test.S:6: Error: selected processor does not support system register name
'apiakeylo_el1'

   when I use "aarch64-none-linux-gnu-gcc -march=armv8.2-a+pauth -c test.S -o
test.o", gcc generates errors as follows:
   test.S: Assembler messages:
test.S:5: Error: selected processor does not support system register name
'apiakeyhi_el1'
test.S:6: Error: selected processor does not support system register name
'apiakeylo_el1'

   when I use "aarch64-none-linux-gnu-gcc -march=armv8.3-a -c test.S -o
test.o", there is no error generated.

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This looks like a binutils issue rather a gcc one. It might be already fixed in
binutils too.

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #4 from xiaoyong yan <yanxiaoyong5 at gmail dot com> ---
(In reply to Andrew Pinski from comment #3)
> This looks like a binutils issue rather a gcc one. It might be already fixed
> in binutils too.

I am using binutils 2.39.0, GNU assembler version 2.39.0

arm-none-eabi-as -v
GNU assembler version 2.39.0 (arm-none-eabi) using BFD version (Arm GNU
Toolchain 12.2.Rel1 (Build arm-12.24)) 2.39.0.20221210

Could you tell which version fixed it?

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #5 from xiaoyong yan <yanxiaoyong5 at gmail dot com> ---
(In reply to Andrew Pinski from comment #3)
> This looks like a binutils issue rather a gcc one. It might be already fixed
> in binutils too.

I encountered issues even with the latest version 2.42 of binutils, as shown
below.

~/x-tools/aarch64-unknown-linux-gnu/bin/aarch64-unknown-linux-gnu-as -v
GNU assembler version 2.42 (aarch64-unknown-linux-gnu) using BFD version
(crosstool-NG 1.26.0.72_810021d) 2.42

~/x-tools/aarch64-unknown-linux-gnu/bin/aarch64-unknown-linux-gnu-as
-mcpu=cortex-a78ae test.S

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #6 from xiaoyong yan <yanxiaoyong5 at gmail dot com> ---
 ~/x-tools/aarch64-unknown-linux-gnu/bin/aarch64-unknown-linux-gnu-as
-mcpu=cortex-a78ae test.S
test.S: Assembler messages:
test.S: Warning: end of file not at end of a line; newline inserted
test.S:5: Error: selected processor does not support system register name
'apiakeyhi_el1'
test.S:6: Error: selected processor does not support system register name
'apiakeylo_el1'

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|WAITING                     |RESOLVED

--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is a bug in GNU Binutils.  These system registers are incorrectly
described as being part of armv8.3-a, rather than part of the Pauth extension. 
Please can you raise a bug there: https://sourceware.org/bugzilla (select
product binutils).

[Bug target/115058] on target arm -mcpu=cortex-a78ae does not allow use pauth and dot product

[yanxiaoyong5 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115058

--- Comment #8 from xiaoyong yan <yanxiaoyong5 at gmail dot com> ---
ok, thanks