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...ke, I put up a set of rough patches that introduce a @llvm.complex.multiply intrinsic (https://reviews.llvm.org/D91347), replace a set of fadd/fsub/fmul instructions with @llvm.complex.multiply (https://reviews.llvm.org/D91353) and lower the intrinsic for FCMLA on AArch64 (https://reviews.llvm.org/D91354). Note that those are just rough proof-of-concept patches. > > Cheers, > Florian Hi Florian, The proposed experimental intrinsics are a difficult detour to accept for performance reasons. With a complex type, the usual algebraic simplifications fall out for free (or close to it). Teachin...

...ke, I put up a set of rough patches that introduce a @llvm.complex.multiply intrinsic (https://reviews.llvm.org/D91347), replace a set of fadd/fsub/fmul instructions with @llvm.complex.multiply (https://reviews.llvm.org/D91353) and lower the intrinsic for FCMLA on AArch64 (https://reviews.llvm.org/D91354). Note that those are just rough proof-of-concept patches. > > Cheers, > Florian Hi Florian, The proposed experimental intrinsics are a difficult detour to accept for performance reasons. With a complex type, the usual algebraic simplifications fall out for free (or close to it). Teachin...

...ke, I put up a set of rough patches that introduce a @llvm.complex.multiply intrinsic (https://reviews.llvm.org/D91347), replace a set of fadd/fsub/fmul instructions with @llvm.complex.multiply (https://reviews.llvm.org/D91353) and lower the intrinsic for FCMLA on AArch64 (https://reviews.llvm.org/D91354). Note that those are just rough proof-of-concept patches. >> >> Cheers, >> Florian > > > The proposed experimental intrinsics are a difficult detour to accept > for performance reasons. With a complex type, the usual algebraic > simplifications fall out for free...

...insic (https://reviews.llvm.org/D91347 <https://reviews.llvm.org/D91347>), replace a set of fadd/fsub/fmul instructions with @llvm.complex.multiply (https://reviews.llvm.org/D91353 <https://reviews.llvm.org/D91353>) and lower the intrinsic for FCMLA on AArch64 (https://reviews.llvm.org/D91354 <https://reviews.llvm.org/D91354>). Note that those are just rough proof-of-concept patches. Cheers, Florian [1] https://developer.arm.com/docs/ddi0596/h/simd-and-floating-point-instructions-alphabetic-order/fcmla-floating-point-complex-multiply-accumulate <https://developer.arm.com/docs...

Ahead of the Wednesday’s roundtable at the developers’ conference, here is version three of the proposal for first-class complex types in LLVM. I was not able to add Krzysztof Parzyszek’s suggestion of a “cunzip” intrinsic returning two vectors as I could not find examples of intrinsics that return two values at the IR level. The Hexagon intrinsics declared to return two values do not actually

...ke, I put up a set of rough patches that introduce a @llvm.complex.multiply intrinsic (https://reviews.llvm.org/D91347), replace a set of fadd/fsub/fmul instructions with @llvm.complex.multiply (https://reviews.llvm.org/D91353) and lower the intrinsic for FCMLA on AArch64 (https://reviews.llvm.org/D91354). Note that those are just rough proof-of-concept patches. > > Cheers, > Florian > > > > The proposed experimental intrinsics are a difficult detour to accept > for performance reasons. With a complex type, the usual algebraic > simplifications fall out for free (or close...