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From: hp@bitrange.com To: gcc-gnats@gcc.gnu.org Subject: target/5985: fix_truncMN2 (e.g. fix_truncdfdi) and fixuns_truncMN2 incorrect on a29k, alpha, arm, c4x, dsp16xx, i370, i386, ia64, m88k, mips, ns32k, pj, romp, rs6000, s390, sh, xtensa Date: Sun, 17 Mar 2002 05:46:00 -0000 [thread overview] Message-ID: <20020317134214.4223.qmail@sources.redhat.com> (raw) >Number: 5985 >Category: target >Synopsis: fix_truncMN2 (e.g. fix_truncdfdi) and fixuns_truncMN2 incorrect on a29k, alpha, arm, c4x, dsp16xx, i370, i386, ia64, m88k, mips, ns32k, pj, romp, rs6000, s390, sh, xtensa >Confidential: no >Severity: non-critical >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Sun Mar 17 05:46:01 PST 2002 >Closed-Date: >Last-Modified: >Originator: Hans-Peter Nilsson >Release: trunk and 3.1 branch and everywhere else >Organization: >Environment: >Description: >From <URL:http://gcc.gnu.org/ml/gcc-patches/2002-03/msg01023.html>, edited: While checking on the floating point operations and comparing with the manual and other targets, it seems several targets (briefly: a29k, alpha, arm, c4x, dsp16xx, i370, i386, ia64, m88k, mips, ns32k, pj, romp, rs6000, s390, sh, xtensa) have fix_truncMN2 patterns that are incorrectly expressed. For example for M=df N=di, the input operand should be (fix:DI (fix:DF (DF-operand)) not just (fix:DI (DF-operand)), since the latter expression requires/promises that the operand is already truncated to an integer in a float-mode, which is the input operand for the fixdfdi2 pattern. Similarly for fixuns_truncMN2. >How-To-Repeat: Read .md for target, specifically fix_truncMN2 and fixuns_truncMN2 patterns. Compare with docs and other targets, like sparc.md, m68k.md. Marvel at how it doesn't seem to affect anything. >Fix: See sparc.md, m68k.md, mmix.md. >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-03-17 13:46 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-03-17 5:46 hp [this message] 2002-03-30 16:01 rth 2003-01-02 18:33 neroden 2003-01-02 20:26 Hans-Peter Nilsson
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