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When I try to compile one of the example applications (e.g., 'Filtering') with IPP v4.0 for Xscale, I receive errors of the following sort (during linking):
/usr/local/ipp/ippwmmx40b/lib/ippSP_WMMX40BLNX_r.a(ssrand.o) uses VFP instructions, whereas .//Filtering does not
Presumably, the Makefile provided has taken care of the correct C-flag options.
I did a Google search (i.e. "uses VFP instructions" or gcc vfp flag), and there was some discussion of this issue. However, I cannot still decipher what the underlying problem is, nor how to solve it.
It appears to be a difference between object files I compile, and the way the IPP libraries were compiled. One was VFP (vector floating point) and the other way was FPA (floating point accelerate?).
I've tried a bunch of compilation flags that may be related (e.g., -mhard-float vs. -msoft-float, etc.), but nothing seems to change.
Perhaps the IPP v4.0 libraries need to be recompiled with different flags, or the tool-chain I have is not compatible (but it was provided by Intel). I need to know either way what I can do to resolve this. Thanks,
Dean
/usr/local/ipp/ippwmmx40b/lib/ippSP_WMMX40BLNX_r.a(ssrand.o) uses VFP instructions, whereas .//Filtering does not
Presumably, the Makefile provided has taken care of the correct C-flag options.
I did a Google search (i.e. "uses VFP instructions" or gcc vfp flag), and there was some discussion of this issue. However, I cannot still decipher what the underlying problem is, nor how to solve it.
It appears to be a difference between object files I compile, and the way the IPP libraries were compiled. One was VFP (vector floating point) and the other way was FPA (floating point accelerate?).
I've tried a bunch of compilation flags that may be related (e.g., -mhard-float vs. -msoft-float, etc.), but nothing seems to change.
Perhaps the IPP v4.0 libraries need to be recompiled with different flags, or the tool-chain I have is not compatible (but it was provided by Intel). I need to know either way what I can do to resolve this. Thanks,
Dean
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Hi Dean,
Yes, you need to use the right version of toolchain. For example, for IPP v3.0 you need arm-linux-gcc v2.95, but for IPP v4.0beta you need arm-linux-gcc v3.21.
Hope it helps.
What IPP samples you are interested? What do you think about IPP functionality? Does it meet your expectations?
Regards,
Vladimir
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> Yes, you need to use the right version of toolchain. For example, for IPP v3.0 you need arm-linux-gcc v2.95, but for IPP v4.0beta you need arm-linux-gcc v3.21.
Thanks for replying. However I "do" have arm-linux-gcc v3.21 running, so it's not that.
Dean
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I have run into the same problem where IPP 4.1 uses VFP instructions, and contrary to several responses, this CAN NOT be resolved by using an early version of the compiler !
The question seems to be asked frequently with no (valid) answers being returned ...
Thanks, Scott.
The question seems to be asked frequently with no (valid) answers being returned ...
Thanks, Scott.
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You may check with the toolchain support in IPP 4.1. You can refer to this URL at:
http://www.intel.com/software/products/ipp/sysreq.htm
http://www.intel.com/software/products/ipp/sysreq.htm
If you think this is an issue in Intel IPP, please submit an issue via Intel Premier Support.
Thanks,
Ying S
Intel IPP
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For the benefit of other "Linux GCC IPP 4.1 for PCA" users:
- GCC 4.0 (as yet unreleased) is reported to have VFP support
- For additional intellectual stimulation :) you can attempt to build a GCC 3.3.x toolchain with VFP support by including additional patches (search http://sources.redhat.com/ml/crossgcc for details)
- Since the Intel IPP libraries for PCA do not use floating point, you may find it easier to modify the e-flags field in ELF header on each of the object files in the Intel library to report something other than VFP ;) (Intel Premier Support may be able to provide a utility program ...)
Best regards, Scott.
- GCC 4.0 (as yet unreleased) is reported to have VFP support
- For additional intellectual stimulation :) you can attempt to build a GCC 3.3.x toolchain with VFP support by including additional patches (search http://sources.redhat.com/ml/crossgcc for details)
- Since the Intel IPP libraries for PCA do not use floating point, you may find it easier to modify the e-flags field in ELF header on each of the object files in the Intel library to report something other than VFP ;) (Intel Premier Support may be able to provide a utility program ...)
Best regards, Scott.

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