[LLVMdev] Help!!!!Help!!!! " LLVM ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16] " problem!!!!!!!!!!!!!!!!!!

[Kevin Qin]

Hi,

Can you show us the command line you are using? At least can you tell us
the backend you tried on? If you can upload the test case as well, it will
be very useful to find out the problem.


Regards,
Kevin


2014-07-10 1:53 GMT+08:00 yalong at multicorewareinc.com <
yalong at multicorewareinc.com>:

> Hi all,
>     I am new to llvm. I need help. Thank you every!
>
>     I want to realize vcvtt.f16.f32  NEON instruction by llvm. This
> instruction covert top-16bits of a single type to f16. I use the intrinsics
> function llvm.convert.to.fp16, but cannot llc , *I meet is following
> problem* :
>
> LLVM ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16]
> 0x9fc0750: f32,ch = load 0x3aafd68, 0x9fc2a20,
> 0x9feaab0<LD4[%sunkaddr85033]> [ORD=125117] [ID=15]
> 0x9fc2a20: i32 = add 0x9fed880, 0x9fd9ea0 [ORD=125115] [ID=13]
> 0x9fed880: i32,ch = CopyFromReg 0x3aafd68, 0x9fbea90 [ORD=125114] [ID=9]
> 0x9fbea90: i32 = Register %vreg13999 [ORD=125114] [ID=1]
> 0x9fd9ea0: i32 = Constant<80> [ORD=125115] [ID=2]
> 0x9feaab0: i32 = undef [ORD=125117] [ID=4]
> In function: internal_function_69
> Command exited with non-zero status 1
>
>     If I change the method, I use " %1 = fptrunc float %0  to half ",
> then " %2 = bitcast half %1 to i16", I meet samiliar problem, *the log is
> following*:
>
> LLVM ERROR: Cannot select: 0x9f554b0: ch = store 0x9d0f28c, 0x9f5d900,
> 0x9f54ba8, 0x9f54b20<ST2[FixedStack0](align=4), trunc to f16> [ID=52]
> 0x9f5d900: f32,ch = load 0x9f5e290, 0x9f5dd40, 0x9f54b20<LD4[%sunkaddr69]>
> [ORD=1810] [ID=51]
> 0x9f5dd40: i32 = add 0x9f55318, 0x9f5e0f8 [ORD=1808] [ID=31]
> 0x9f55318: i32,ch = CopyFromReg 0x9d0f28c, 0x9f6a3a0 [ORD=1796] [ID=26]
> 0x9f6a3a0: i32 = Register %vreg32 [ORD=1796] [ID=1]
> 0x9f5e0f8: i32 = Constant<64> [ORD=1808] [ID=17]
> 0x9f54b20: i32 = undef [ORD=1797] [ID=6]
> 0x9f54ba8: i32 = FrameIndex<0> [ID=24]
> 0x9f54b20: i32 = undef [ORD=1797] [ID=6]
> In function: testVCVTT32TO16Function
>
>
>     Anyone can help me?? Thank you again.
>
> ------------------------------
> yalong at multicorewareinc.com
>
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>
>


-- 
Best Regards,

Kevin Qin
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