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* target/7238: __builtin_alpha_pkwb generates invalid assembly
@ 2002-07-08 17:06 Falk Hueffner
0 siblings, 0 replies; 2+ messages in thread
From: Falk Hueffner @ 2002-07-08 17:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 7238
>Category: target
>Synopsis: __builtin_alpha_pkwb generates invalid assembly
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Jul 08 17:06:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Falk Hueffner
>Release: 3.2 20020707 (experimental)
>Organization:
>Environment:
System: Linux borkum 2.4.18 #1 Tue Jul 2 23:35:32 CEST 2002 alpha unknown
Architecture: alpha
host: alphapca56-unknown-linux-gnu
build: alphapca56-unknown-linux-gnu
target: alphapca56-unknown-linux-gnu
configured with: ../configure --enable-languages=c
>Description:
With the input below, gcc generates a pkwb statement that uses a
floating point register, which is not valid. Also, it loses pkwb(23),
so the result would be wrong even if it had chosen an integer
register.
>How-To-Repeat:
% cat bug.c
unsigned long simple_idct_put(unsigned long l)
{
l = __builtin_alpha_pkwb(l) | (__builtin_alpha_pkwb(23) << 32);
return __builtin_alpha_pkwb(l);
}
% gcc -O3 -mcpu=pca56 -c bug.c
/tmp/ccbGMrgd.s: Assembler messages:
/tmp/ccbGMrgd.s:13: Error: inappropriate arguments for opcode `pkwb'
/tmp/ccbGMrgd.s:14: Error: inappropriate arguments for opcode `pkwb'
% gcc -O3 -mcpu=pca56 -S bug.c && cat bug.s
.set noat
.set noreorder
.arch pca56
.text
.align 2
.align 4
.globl simple_idct_put
.ent simple_idct_put
$simple_idct_put..ng:
simple_idct_put:
.frame $30,0,$26,0
.prologue 0
pkwb $16,$f10
pkwb $f10,$0
ret $31,($26),1
.end simple_idct_put
.ident "GCC: (GNU) 3.2 20020707 (experimental)"
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: target/7238: __builtin_alpha_pkwb generates invalid assembly
@ 2003-01-03 19:37 bangerth
0 siblings, 0 replies; 2+ messages in thread
From: bangerth @ 2003-01-03 19:37 UTC (permalink / raw)
To: falk.hueffner, gcc-bugs, gcc-prs, nobody
Synopsis: __builtin_alpha_pkwb generates invalid assembly
State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Fri Jan 3 11:37:30 2003
State-Changed-Why:
Fixed according to submitter.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7238
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-07-08 17:06 target/7238: __builtin_alpha_pkwb generates invalid assembly Falk Hueffner
2003-01-03 19:37 bangerth
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