Hi Carl, on 2023/6/20 02:54, Carl Love wrote: > > Kewen, GCC maintainers: > > Version 6, Fixed missing change log entry. Changed builtin id names as > requested. Missed making the change on the last version. Fixed > comment in the three test cases. Reran regression suite on Power 10, > no regressions. > > Version 5, Tested the patch on P9 BE per request. Fixed up test case > to get the correct expected values for BE and LE. Fixed typos. > Updated the doc/extend.texi to clarify the vector arguments. Changed > test file names per request. Moved builtin defs next to related > definitions. Renamed new mode_attr. Removed new mode_iterator, used > existing iterator instead. Renamed mode_iterator VSEEQP_DI to V2DI_DI. > Fixed up overloaded definitions per request. > > Version 4, added missing cases for new xxexpqp, xsxexpdp and xsxsigqp > cases to rs6000_expand_builtin. Merged the new define_insn definitions > with the existing definitions. Renamed the builtins by removing the > __builtin_ prefix from the names. Fixed the documentation for the > builtins. Updated the test files to check the desired instructions > were generated. Retested patch on Power 10 with no regressions. > > Version 3, was able to get the overloaded version of scalar_insert_exp > to work and the change to xsxexpqp_f128_<mode> define instruction to > work with the suggestions from Kewen. > > Version 2, I have addressed the various comments from Kewen. I had > issues with adding an additional overloaded version of > scalar_insert_exp with vector arguments. The overload infrastructure > didn't work with a mix of scalar and vector arguments. I did rename > the __builtin_insertf128_exp to __builtin_vsx_scalar_insert_exp_qp make > it similar to the existing builtin. I also wasn't able to get the > suggested merge of xsxexpqp_f128_<mode> with xsxexpqp_<mode> to work so > I left the two simpler definitiions. > > The patch add three new builtins to extract the significand and > exponent of an IEEE float 128-bit value where the builtin argument is a > vector. Additionally, a builtin to insert the exponent into an IEEE > float 128-bit vector argument is added. These builtins were requested > since there is no clean and optimal way to transfer between a vector > and a scalar IEEE 128 bit value. > > The patch has been tested on Power 9 BE and Power 10 LE with no > regressions. Please let me know if the patch is acceptable or not. > Thanks.
OK for trunk with some nits fixed in changelog (sorry that I didn't catch all of them in previous review, but I don't think you need to post a new version). Thanks! > > Carl > > -------------------------------------------- > rs6000: Add builtins for IEEE 128-bit floating point values > > Add support for the following builtins: > > __vector unsigned long long int scalar_extract_exp_to_vec (__ieee128); > __vector unsigned __int128 scalar_extract_sig_to_vec (__ieee128); > __ieee128 scalar_insert_exp (__vector unsigned __int128, > __vector unsigned long long); > > The instructions used in the builtins operate on vector registers. Thus > the result must be moved to a scalar type. There is no clean, performant > way to do this. The user code typically needs the result as a vector > anyway. > > gcc/ > * config/rs6000/rs6000-builtin.cc (rs6000_expand_builtin): > Rename CCDE_FOR_xsxexpqp_tf to CODE_FOR_xsxexpqp_tf_di. > Rename CODE_FOR_xsxexpqp_kf to CODE_FOR_xsxexpqp_kf_di. Miss "Rename CODE_FOR_xsxsigqp_tf to CODE_FOR_xsxsigqp_tf_ti." "Rename CODE_FOR_xsxsigqp_kf to CODE_FOR_xsxsigqp_kf_ti." "Rename CODE_FOR_xsiexpqp_tf to CODE_FOR_xsiexpqp_tf_di." "Rename CODE_FOR_xsiexpqp_kf to CODE_FOR_xsiexpqp_kf_di." > (CODE_FOR_xsxexpqp_kf_v2di, CODE_FOR_xsxsigqp_kf_v1ti, > CODE_FOR_xsiexpqp_kf_v2di): Add case statements. > * config/rs6000/rs6000-buildin.def (__builtin_extractf128_exp, > __builtin_extractf128_sig, __builtin_insertf128_exp): Add new > builtin definitions. Should be with correct names: (__builtin_vsx_scalar_extract_exp_to_vec, __builtin_vsx_scalar_extract_sig_to_vec, __builtin_vsx_scalar_insert_exp_vqp): > Rename xsxexpqp_kf, xsxsigqp_kf, xsiexpqp_kf to xsexpqp_kf_di, > xsxsigqp_kf_ti, xsiexpqp_kf_di respectively. > * config/rs6000/rs6000-c.cc (altivec_resolve_overloaded_builtin): > Update case RS6000_OVLD_VEC_VSIE to handle MODE_VECTOR_INT for new > overloaded instance. Update comments. > * config/rs6000/rs6000-overload.def > (__builtin_vec_scalar_insert_exp): Add new overload definition with > vector arguments. > (scalar_extract_exp_to_vec, scalar_extract_sig_to_vec): New > overloaded definitions. > * config/vsx.md (V2DI_DI): New mode iterator. > (DI_to_TI): New mode attribute. > Rename xsxexpqp_<mode> to sxexpqp_<IEEE128:mode>_<V2DI_DI:mode>. > Rename xsxsigqp_<mode> to xsxsigqp_<IEEE128:mode>_<VEC_TI:mode>. > Rename xsiexpqp_<mode> to xsiexpqp_<IEEE128:mode>_<V2DI_DI:mode>. > * doc/extend.texi (__builtin_extractf128_exp, > __builtin_extractf128_sig): Add documentation for new builtins. Should be with correct names: (scalar_extract_exp_to_vec, scalar_extract_sig_to_vec): BR, Kewen