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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/113652] [14 regression] Failed bootstrap on ppc unrecognized opcode: `lfiwzx' with -mcpu=7450 Date: Tue, 30 Jan 2024 08:58:04 +0000 [thread overview] Message-ID: <bug-113652-4-WAr8wBqXjq@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-113652-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113652 Kewen Lin <linkw at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2024-01-30 --- Comment #13 from Kewen Lin <linkw at gcc dot gnu.org> --- One more finding: without an explicit cpu type but -mvsx, gcc passes -mpower7 to assembler already, but if there is an explicitly specified cpu type, it won't do that. I think the reason why it doesn't always make it is that only the last cpu type wins and the passing can override some higher cpu type unexpectedly. The fixing candidates seems to be: diff --git a/libgcc/config/rs6000/t-float128 b/libgcc/config/rs6000/t-float128 index b09b5664af0..47b06d3c30d 100644 --- a/libgcc/config/rs6000/t-float128 +++ b/libgcc/config/rs6000/t-float128 @@ -74,7 +74,7 @@ fp128_includes = $(srcdir)/soft-fp/double.h \ $(srcdir)/soft-fp/soft-fp.h # Build the emulator without ISA 3.0 hardware support. -FP128_CFLAGS_SW = -Wno-type-limits -mvsx -mfloat128 \ +FP128_CFLAGS_SW = -Wno-type-limits -mvsx -mfloat128 -mcpu=power7 \ -mno-float128-hardware -mno-gnu-attribute \ -I$(srcdir)/soft-fp \ -I$(srcdir)/config/rs6000 \ Or diff --git a/libgcc/config/rs6000/t-float128 b/libgcc/config/rs6000/t-float128 index b09b5664af0..bf4a5e6aaf0 100644 --- a/libgcc/config/rs6000/t-float128 +++ b/libgcc/config/rs6000/t-float128 @@ -74,7 +74,7 @@ fp128_includes = $(srcdir)/soft-fp/double.h \ $(srcdir)/soft-fp/soft-fp.h # Build the emulator without ISA 3.0 hardware support. -FP128_CFLAGS_SW = -Wno-type-limits -mvsx -mfloat128 \ +FP128_CFLAGS_SW = -Wno-type-limits -mvsx -mfloat128 -Wa,-many \ -mno-float128-hardware -mno-gnu-attribute \ -I$(srcdir)/soft-fp \ -I$(srcdir)/config/rs6000 \ As gcc considers -mvsx to imply -mcpu=power7 (appending onto the current specified cpu type if there is one) while assembler doesn't consider like that.
next prev parent reply other threads:[~2024-01-30 8:58 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-29 13:01 [Bug target/113652] New: ppc: unrecognized opcode: `lfiwzx' csfore at posteo dot net 2024-01-29 13:07 ` [Bug target/113652] [14 regression] Failed bootstrap on ppc unrecognized opcode: `lfiwzx' with -mcpu=7450 rguenth at gcc dot gnu.org 2024-01-29 13:12 ` csfore at posteo dot net 2024-01-29 16:50 ` erhard_f at mailbox dot org 2024-01-29 17:51 ` csfore at posteo dot net 2024-01-29 20:49 ` csfore at posteo dot net 2024-01-30 3:05 ` linkw at gcc dot gnu.org 2024-01-30 3:26 ` linkw at gcc dot gnu.org 2024-01-30 3:44 ` pinskia at gcc dot gnu.org 2024-01-30 6:16 ` [Bug target/113652] " linkw at gcc dot gnu.org 2024-01-30 6:18 ` sjames at gcc dot gnu.org 2024-01-30 6:37 ` linkw at gcc dot gnu.org 2024-01-30 6:59 ` [Bug target/113652] [14 regression] " linkw at gcc dot gnu.org 2024-01-30 8:58 ` linkw at gcc dot gnu.org [this message] 2024-02-07 23:15 ` amodra at gmail dot com 2024-02-09 4:21 ` bergner at gcc dot gnu.org 2024-02-12 12:38 ` csfore at posteo dot net 2024-02-15 10:29 ` erhard_f at mailbox dot org 2024-03-27 13:46 ` rguenth at gcc dot gnu.org 2024-03-28 20:37 ` meissner at gcc dot gnu.org 2024-03-29 12:58 ` segher at gcc dot gnu.org 2024-03-29 13:04 ` segher at gcc dot gnu.org 2024-03-29 21:17 ` bergner at gcc dot gnu.org 2024-04-13 4:39 ` meissner at gcc dot gnu.org 2024-05-07 7:44 ` [Bug target/113652] [14/15 " rguenth at gcc dot gnu.org 2024-05-09 3:18 ` bergner at gcc dot gnu.org 2024-05-09 9:41 ` segher at gcc dot gnu.org 2024-05-09 13:55 ` erhard_f at mailbox dot org
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