[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171 Dzianis Kahanovich mahatma at eu dot by changed: What|Removed |Added Attachment #22444|0 |1 is obsolete|| --- Comment #8 from Dzianis Kahanovich mahatma at eu dot by 2011-04-15 16:30:58 UTC --- Created attachment 23999 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=23999 atune-4.6.patch Cleanup (+ unused macros), reduce code (ASM_SPEC_MTUNE moved to i386.h), adopt to 4.6.
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171 Dzianis Kahanovich mahatma at eu dot by changed: What|Removed |Added Attachment #22434|0 |1 is obsolete|| --- Comment #7 from Dzianis Kahanovich mahatma at eu dot by 2010-11-18 12:31:25 UTC --- Created attachment 22444 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22444 atune2.patch Bugfix targets.
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171 --- Comment #6 from Dzianis Kahanovich mahatma at eu dot by 2010-11-17 19:15:10 UTC --- Created attachment 22434 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22434 atune.patch Yes, I read maillist archives. But I don't know current state of process and may suggest own solution (best for me). Sorry if not actual. I pass only native march|mtune|Wa,-mtune - driver-i386.c -mtune results set are more compatible with GAS -mtune. And host_detect_local_cpu changed to process astune parameter and few (atom generic) incompatible keywords. There are only linux64.h changed. Others - likewise if somebody find this useful. patch produced on 5.0, but used on 4.5.
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171 Dzianis Kahanovich mahatma at eu dot by changed: What|Removed |Added CC||mahatma at eu dot by --- Comment #5 from Dzianis Kahanovich mahatma at eu dot by 2010-11-07 16:15:37 UTC --- (In reply to comment #0) Even Linux kernel use -march without -Wa,-march. If I pass -Wa,-march=prescott option to Linux kernel - they failed to build (used wide range of directives like AMD's prefetch). IMHO only -mtune need to be passed to not bound directives range.
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
--- Comment #4 from vvv at ru dot ru 2009-05-25 19:54 --- (In reply to comment #2) This is very odd? What is the assembler doing that the compiler isn't? There are exist some optimizations impossible without exact knowledge of address and opcodes, One example avoiding of branch mispredicts - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39942 Other example - Ensure instructions using 0xF7 opcode byte does not start at offset 14 of a fetch line... Unfortunately, current version GNU AS cat't do this optimizations. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
--- Comment #1 from rguenth at gcc dot gnu dot org 2009-05-24 21:17 --- Confirmed. But properly supporting this is a bit of a hassle because we need to support assemblers other than GNU as. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Severity|normal |enhancement Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|-00-00 00:00:00 |2009-05-24 21:17:12 date|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
--- Comment #2 from sabre at nondot dot org 2009-05-25 00:46 --- This is very odd? What is the assembler doing that the compiler isn't? -- sabre at nondot dot org changed: What|Removed |Added CC||sabre at nondot dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171
[Bug target/40171] GCC does not pass -mtune and -march options to assembler!
--- Comment #3 from pinskia at gcc dot gnu dot org 2009-05-25 00:55 --- (In reply to comment #2) This is very odd? What is the assembler doing that the compiler isn't? different processors have better nops for different sizes. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40171
