[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 Bill Schmidt changed: What|Removed |Added Status|WAITING |RESOLVED Resolution|--- |FIXED CC||wschmidt at gcc dot gnu.org --- Comment #8 from Bill Schmidt --- Work is complete.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 Carl Love changed: What|Removed |Added CC||cel at us dot ibm.com --- Comment #7 from Carl Love --- Patch approved by Segher with a few minor fixes to the patch. Patch committed to mainline commit 9439378f7a08cf9c8f524c9f3758a37d804ac106 Author: Carl Love Date: Thu Mar 5 12:52:35 2020 -0600 rs6000: Fix -mlong-double documentation gcc/ChangeLog 2020-03-09 Carl Love * config/rs6000/rs6000.opt: Update the description of the command line option.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 --- Comment #6 from Carl Love --- Yea, I like that a bit better. It is a bit shorter, mine was a bit verbose. I updated the patch to print: -mlong-double- Use -mlong-double-64 for 64-bit IEEE floating point format. Use -mlong-double-128 for 128-bit floating point format (either IEEE or IBM). I will post the patch to the mailing list for review/acceptance on mainline.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 --- Comment #5 from Segher Boessenkool --- Yeah, not sure. A user can just do `-mlong-double-128`, and will get whichever 128-bit format is the default. That is the "old" way, when we only had the ibm128 format, and it will be the new way too, when ibm128 has become a bad dream and everything uses ieee128. Maybe just something like Use -mlong-double-128 for an 128-bit floating point format (either IEEE or IBM)?
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 --- Comment #4 from Carl Love --- Created attachment 47982 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47982&action=edit patch to update -mlong-double-NN description Attached the proposed patch so I will not lose it.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 Carl Love changed: What|Removed |Added CC||cel at us dot ibm.com --- Comment #3 from Carl Love --- I have looked at what -mlong-double-64 and -mlong-double-128 do. The -mlong-double-64 tells GCC to use the 64-bit IEEE floating point format. The -mlong-double-128 tells GCC to use 128-bit floating point format. On ppc64, there are actually two 128-bit floating point formats that are supported. So it looks to me like the user should also specify either -mabi=ieeelongdouble to get the 128-bit IEEE floating point format or -mabi=ibmlongdouble to get the IBM 128-bit floating point format. I created a patch that updates the output of the gcc --target-help command to print the following: -mlong-double- Use -mlong-double-64 for 64-bit IEEE floating point format. Use -mlong-double-128 and -mabi=ieeelongdouble for 128-bit IEEE floating point format. Use -mlong-double-128 and -mabi=ibmlongdouble for 128-bit IBM floating point format. Please let me know if this description is accurate and better. Suggestions on improvements are always welcome.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 --- Comment #2 from Segher Boessenkool --- That isn't documentation.
[Bug target/91638] powerpc -mlong-double-NN (documentation) issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91638 Martin Liška changed: What|Removed |Added Status|UNCONFIRMED |WAITING Last reconfirmed||2020-01-29 CC||marxin at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Martin Liška --- I see a documentation: $ powerpc64le-suse-linux-gcc --help=target | grep long-do -mlong-double-[64,128] Specify size of long double.
