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...tt ( I can sure, >> "fptrunc double %tmp to float" is right, but "fptrunc float %tmp to >> half" is wrong). My target platform is MIPS. The command as following: >> >> NEON: >> vcvtt.f16.f32 s2, s0 >> >> llvm Code: >> >> %Vt_2 = load float* %VFP_s0, align 4 >> %Vt3_1 = fptrunc float %Vt_2 to half >> %Vt4_1 = bitcast half %Vt3_1 to i16 >> %Vt2_2 = bitcast float* %VFP_s2 to <2 x i16>* >> %Vrti_1 = load <2 x i16>* %Vt2_2, align 4 >> %Vrti_2 = insertelement <2 x i16> %Vrti_1, i...

...  Thank you Kevin!!!    If I use fptrunc and bitcast realise NEON vcvtt ( I can sure, "fptrunc  double %tmp to float" is right, but "fptrunc float %tmp to half" is wrong). My target platform is MIPS.  The command as following: NEON:            vcvtt.f16.f32 s2, s0 llvm Code: %Vt_2 = load float* %VFP_s0, align 4 %Vt3_1 = fptrunc float %Vt_2 to half %Vt4_1 = bitcast half %Vt3_1 to i16 %Vt2_2 = bitcast float* %VFP_s2 to <2 x i16>* %Vrti_1 = load <2 x i16>* %Vt2_2, align 4 %Vrti_2 = insertelement <2 x i16> %Vrti_1, i16 %Vt4_1, i32 1 %Vt2_3 = bitcas...

...ed to i32).   If you then convert every occurrence of 'fptrunc' from float to half with calls to @llvm.convert.to.fp16, then you should be able to compile (hopefully) with no errors. That means, in your original example you would convert the following IR statement:   %Vt3_1 = fptrunc float %Vt_2 to half into   %Vt3_1 = call i16 @llvm.convert.to.fp16(float %Vt_2)   The downside is that you will have to add definitions for '__gnu_f2h_ieee' and '__gnu_h2f_ieee' in the compiler runtime. That is because the backend will expand all the float-half conversions into library calls......

...    If I use fptrunc and bitcast realise NEON vcvtt ( I can sure, "fptrunc  double %tmp to float" is right, but "fptrunc float %tmp to half" is wrong). My target platform is MIPS.  The command as following:   NEON:             vcvtt.f16.f32 s2, s0 llvm Code: %Vt_2 = load float* %VFP_s0, align 4 %Vt3_1 = fptrunc float %Vt_2 to half %Vt4_1 = bitcast half %Vt3_1 to i16 %Vt2_2 = bitcast float* %VFP_s2 to <2 x i16>* %Vrti_1 = load <2 x i16>* %Vt2_2, align 4 %Vrti_2 = insertelement <2 x i16> %Vrti_1, i16 %Vt4_1, i32 1 %Vt2_3 = bitcast...

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,