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[Bug target/59784] New: Nios2: Wrong code generation for fextsd custom instruction
- From: "savin.zlobec at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 13 Jan 2014 10:39:42 +0000
- Subject: [Bug target/59784] New: Nios2: Wrong code generation for fextsd custom instruction
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59784
Bug ID: 59784
Summary: Nios2: Wrong code generation for fextsd custom
instruction
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: savin.zlobec at gmail dot com
Created attachment 31819
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31819&action=edit
Fix
The following code:
double f2d(float x) { return (double)x; }
Compiled with -O2 ... -mcustom-frdy=2 ... -mcustom-fextsd=37
Compiles to:
0: 2009c972 custom 37,r4,r4,zero
4: 0009c0b2 custom 2,r4,zero,zero
8: 2005883a mov r2,r4
c: 2807883a mov r3,r5
10: f800283a ret
Note the 'custom 37,r4,r4,zero', should be 'custom 37,r5,r4,zero'.
Patch attached.