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* [Bug c/47751] New: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC
@ 2011-02-15 13:13 sebastian.huber@embedded-brains.de
2011-02-15 13:23 ` [Bug c/47751] " sebastian.huber@embedded-brains.de
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: sebastian.huber@embedded-brains.de @ 2011-02-15 13:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47751
Summary: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe
-Os on PowerPC
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: sebastian.huber@embedded-brains.de
Target: powerpc-rtems4.11una
Created attachment 23349
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23349
Assembler code.
In the attached assembler file:
Line 371: Save of non-volatile registers via stmw 25,28(1)
Line 454: Restore of non-volatile registers via b _rest64gpr_25_x
This procedure is completely wrong, e.g. _rest64gpr_25_x loads the link
register from a wrong stack position with an arbitrary value.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c/47751] Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC 2011-02-15 13:13 [Bug c/47751] New: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC sebastian.huber@embedded-brains.de @ 2011-02-15 13:23 ` sebastian.huber@embedded-brains.de 2011-02-15 17:57 ` [Bug target/47751] " joseph at codesourcery dot com 2011-02-22 11:54 ` sebastian.huber@embedded-brains.de 2 siblings, 0 replies; 4+ messages in thread From: sebastian.huber@embedded-brains.de @ 2011-02-15 13:23 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47751 --- Comment #1 from Sebastian Huber <sebastian.huber@embedded-brains.de> 2011-02-15 13:12:52 UTC --- Created attachment 23350 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23350 C source code corresponding to the assembler code. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/47751] Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC 2011-02-15 13:13 [Bug c/47751] New: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC sebastian.huber@embedded-brains.de 2011-02-15 13:23 ` [Bug c/47751] " sebastian.huber@embedded-brains.de @ 2011-02-15 17:57 ` joseph at codesourcery dot com 2011-02-22 11:54 ` sebastian.huber@embedded-brains.de 2 siblings, 0 replies; 4+ messages in thread From: joseph at codesourcery dot com @ 2011-02-15 17:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47751 --- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-02-15 17:51:18 UTC --- -mfloat-gprs=double or -mspe without -mabi=spe does not correspond to any standard ABI variant and is very likely to be broken. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/47751] Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC 2011-02-15 13:13 [Bug c/47751] New: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC sebastian.huber@embedded-brains.de 2011-02-15 13:23 ` [Bug c/47751] " sebastian.huber@embedded-brains.de 2011-02-15 17:57 ` [Bug target/47751] " joseph at codesourcery dot com @ 2011-02-22 11:54 ` sebastian.huber@embedded-brains.de 2 siblings, 0 replies; 4+ messages in thread From: sebastian.huber@embedded-brains.de @ 2011-02-22 11:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47751 --- Comment #3 from Sebastian Huber <sebastian.huber@embedded-brains.de> 2011-02-22 11:18:29 UTC --- (In reply to comment #2) > -mfloat-gprs=double or -mspe without -mabi=spe does not correspond to any > standard ABI variant and is very likely to be broken. Thanks for the hint. Adding the -mabi=spe option fixed the problem. A notice in the -mfloat-gprs description of the documentation would be nice. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-02-22 11:18 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-02-15 13:13 [Bug c/47751] New: Wrong code with -mcpu=8540 -mfloat-gprs=double -mspe -Os on PowerPC sebastian.huber@embedded-brains.de 2011-02-15 13:23 ` [Bug c/47751] " sebastian.huber@embedded-brains.de 2011-02-15 17:57 ` [Bug target/47751] " joseph at codesourcery dot com 2011-02-22 11:54 ` sebastian.huber@embedded-brains.de
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