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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/101022] New: rs6000: __builtin_altivec_vcmpequt expands to wrong pattern Date: Thu, 10 Jun 2021 19:50:52 +0000 [thread overview] Message-ID: <bug-101022-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101022 Bug ID: 101022 Summary: rs6000: __builtin_altivec_vcmpequt expands to wrong pattern Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: wschmidt at gcc dot gnu.org Target Milestone: --- This line appears in a recent patch committed this week: +BU_P10V_AV_2 (VCMPEQUT, "vcmpequt", CONST, eqvv1ti3) This builtin should expand to the ISA 3.1 vcmpequq instruction, but this definition causes it to expand to bitwise equivalence (not-XOR). That violates the definition of vec_cmpeq, which must return all 0s or all 1s for each lane element. For this type, that means all 0s or all 1s in the entire register.
next reply other threads:[~2021-06-10 19:50 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-10 19:50 wschmidt at gcc dot gnu.org [this message] 2021-06-10 19:52 ` [Bug target/101022] " wschmidt at gcc dot gnu.org 2021-06-10 19:56 ` wschmidt at gcc dot gnu.org 2021-06-10 22:20 ` cel at us dot ibm.com 2021-06-11 14:08 ` wschmidt at gcc dot gnu.org 2021-06-15 15:44 ` cvs-commit at gcc dot gnu.org 2022-01-14 18:39 ` wschmidt at gcc dot gnu.org
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