Helium and arm-none-eabi-gcc version 13.2.1 and 13.3.1

[ilyesgouta]

Hi,

I'm using arm-none-eabi-gcc version 13.2.1 20231009 (Arm GNU Toolchain 13.2.rel1 (Build arm-13.7)) to build Arm2D library through CMake and I'm getting the warning below during the build:

81 | # pragma GCC warning "GCC only has basic support for Helium and its
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
82 | performance might highly like disappoint you,You can define a macro
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
83 | ARM_2D_SUPPRESS_GCC_HELIUM_PERFORMANCE_WARNING to suppress this warning."
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Is this warning still actual with the GCC 13.2.1 release from Arm?

If yes, then what would be the better compiler (and version) to build Arm2D?

Regards,
Ilyes

[ilyesgouta]

Hi,

I tried with the latest 13.3.rel1 release from Arm and I'm still getting the error below when building the library:

D:\arm-gnu-toolchain-13.3.rel1\bin\arm-none-eabi-gcc.exe --sysroot=D:/arm-gnu-toolchain-13.3.rel1/bin/../arm-none-eabi -ID:\Projects\Arm-2D\Library\Include -Wno-nonnull-compare -Wno-unused-value -fms-extensions -march=armv8.1-m.main+mve.fp+fp.dp -mfloat-abi=hard -mtune=cortex-m85 -mcmse -mthumb -fshort-enums -fno-strict-aliasing -ffunction-sections -fdata-sections -fno-exceptions -flax-vector-conversions -fomit-frame-pointer -DRTE_Acceleration_Arm_2D -DRTE_Acceleration_Arm_2D_Alpha_Blending -DRTE_Acceleration_Arm_2D_Transform -DRTE_Acceleration_Arm_2D_Filter -Wno-format -Wno-unused-function -Wno-maybe-uninitialized -MD -MT CMakeFiles/ARM2D.dir/Library/Source/arm_2d_helium.c.obj -MF CMakeFiles\ARM2D.dir\Library\Source\arm_2d_helium.c.obj.d -o CMakeFiles\ARM2D.dir\Library\Source\arm_2d_helium.c.obj -c D:\Projects\Arm-2D\Library\Source\arm_2d_helium.c
In file included from D:\Projects\Arm-2D\Library\Include/arm_2d.h:35,
                 from D:\Projects\Arm-2D\Library\Source\arm_2d_helium.c:34:
D:\Projects\Arm-2D\Library\Include/arm_2d_types.h:81:32: warning: GCC only has basic support for Helium and its performance might highly like disappoint you,You can define a macro __ARM_2D_SUPPRESS_GCC_HELIUM_PERFORMANCE_WARNING__ to suppress this warning.
   81 | #           pragma GCC warning "GCC only has basic support for Helium and its\
      |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   82 |  performance might highly like disappoint you,You can define a macro\
      |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   83 |  __ARM_2D_SUPPRESS_GCC_HELIUM_PERFORMANCE_WARNING__ to suppress this warning."
      |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\goutai\AppData\Local\Temp\ccKRlDr3.s: Assembler messages:
C:\Users\goutai\AppData\Local\Temp\ccKRlDr3.s:141856: Error: bad element type for instruction -- `vstrb.u16 q7,[r1],#8'
CMakeFiles\ARM2D.dir\build.make:133: recipe for target 'CMakeFiles/ARM2D.dir/Library/Source/arm_2d_helium.c.obj' failed

Error: bad element type for instruction -- `vstrb.u16 q7,[r1],#8

Any thoughts on how to fix this?

Regards,
Ilyes

[adam9500370]

Hi,

I tried with the latest 13.3.rel1 release from Arm and I'm still getting the error below when building the library:

D:\arm-gnu-toolchain-13.3.rel1\bin\arm-none-eabi-gcc.exe --sysroot=D:/arm-gnu-toolchain-13.3.rel1/bin/../arm-none-eabi -ID:\Projects\Arm-2D\Library\Include -Wno-nonnull-compare -Wno-unused-value -fms-extensions -march=armv8.1-m.main+mve.fp+fp.dp -mfloat-abi=hard -mtune=cortex-m85 -mcmse -mthumb -fshort-enums -fno-strict-aliasing -ffunction-sections -fdata-sections -fno-exceptions -flax-vector-conversions -fomit-frame-pointer -DRTE_Acceleration_Arm_2D -DRTE_Acceleration_Arm_2D_Alpha_Blending -DRTE_Acceleration_Arm_2D_Transform -DRTE_Acceleration_Arm_2D_Filter -Wno-format -Wno-unused-function -Wno-maybe-uninitialized -MD -MT CMakeFiles/ARM2D.dir/Library/Source/arm_2d_helium.c.obj -MF CMakeFiles\ARM2D.dir\Library\Source\arm_2d_helium.c.obj.d -o CMakeFiles\ARM2D.dir\Library\Source\arm_2d_helium.c.obj -c D:\Projects\Arm-2D\Library\Source\arm_2d_helium.c
In file included from D:\Projects\Arm-2D\Library\Include/arm_2d.h:35,
                 from D:\Projects\Arm-2D\Library\Source\arm_2d_helium.c:34:
D:\Projects\Arm-2D\Library\Include/arm_2d_types.h:81:32: warning: GCC only has basic support for Helium and its performance might highly like disappoint you,You can define a macro __ARM_2D_SUPPRESS_GCC_HELIUM_PERFORMANCE_WARNING__ to suppress this warning.
   81 | #           pragma GCC warning "GCC only has basic support for Helium and its\
      |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   82 |  performance might highly like disappoint you,You can define a macro\
      |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   83 |  __ARM_2D_SUPPRESS_GCC_HELIUM_PERFORMANCE_WARNING__ to suppress this warning."
      |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Users\goutai\AppData\Local\Temp\ccKRlDr3.s: Assembler messages:
C:\Users\goutai\AppData\Local\Temp\ccKRlDr3.s:141856: Error: bad element type for instruction -- `vstrb.u16 q7,[r1],#8'
CMakeFiles\ARM2D.dir\build.make:133: recipe for target 'CMakeFiles/ARM2D.dir/Library/Source/arm_2d_helium.c.obj' failed

Error: bad element type for instruction -- `vstrb.u16 q7,[r1],#8

Any thoughts on how to fix this?

Regards, Ilyes

I also encountered this error when building with arm gcc. It is caused by this typo.
I created the pull request to fix.

[GorgonMeducer]

I didn't expect a typo could be the reason behind it. Thank you very much.

[ilyesgouta]

Hi,

Good finding @adam9500370. Has this been merged?

Has Arm-2D been (extensively) tested using GCC intrinsics w.r.t performance? any testing report in the repository?

Thank you,

Ilyes

[GorgonMeducer]

@ilyesgouta Merged.
There is a PC project template in the example folder, and this PC project is using GCC.

[GorgonMeducer]

We still highly recommend people use LLVM-ET rather than GCC.