public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "x8zmac at hotmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/64871] New: inline assembly neon Date: Fri, 30 Jan 2015 06:39:00 -0000 [thread overview] Message-ID: <bug-64871-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64871 Bug ID: 64871 Summary: inline assembly neon Product: gcc Version: 4.8.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: x8zmac at hotmail dot com Hi I add a piece of code in multimedia. It makes data in array reverse. It works, but when I add -O2 or -O3 the result is error and vmov with -O2 ,-O3 create illegal instruction. asm volatile ( "pld [%0, #0xFFF];\n\t\ vldm %0!,{d0-d3};\n\t\ vswp.32 d0,d3;\n\t\ vswp.32 d1,d2;\n\t\ VREV64.32 q0, q0;\n\t\ VREV64.32 q1, q1;\n\t\ vstm %1!,{d0-d3};" : :"r"(data),"r"(coeff),"r"(tmp),"r"(sum),"r"(ptr) :"d0", "d1","d2","d3","d4","d5","d6","d7" ); asm volatile ( "pld [%0, #0xFFF];\n\t\ vldm %0!,{d0-d3};\n\t\ vldm %1!,{d4-d7};\n\t\ VMUL.I32 d0,d0,d4;\n\t\ VMUL.I32 d1,d1,d5;\n\t\ VMUL.I32 d2,d2,d6;\n\t\ VMUL.I32 d3,d3,d7;\n\t\ VADD.I32 d0,d0,d1;\n\t\ VADD.I32 d2,d2,d3;\n\t\ VADD.I32 d0,d0,d2;\n\t\ VMOV %2,%3,d0;\n\t\ add %3,%3,%2;\n\t\ str %3,[%4]" : :"r"(data),"r"(coeff),"r"(tmp),"r"(sum),"r"(ptr) :"d0", "d1","d2","d3","d4","d5","d6","d7" );
next reply other threads:[~2015-01-30 6:39 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-01-30 6:39 x8zmac at hotmail dot com [this message] 2015-01-30 7:40 ` [Bug target/64871] " pinskia at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-64871-4@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).