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[Bug target/20540] "-march=i386" doesn't mean "limit instruction set to what 80386 understands"
- From: "zeev dot tarantov at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 18 Mar 2005 20:36:26 -0000
- Subject: [Bug target/20540] "-march=i386" doesn't mean "limit instruction set to what 80386 understands"
- References: <20050318202510.20540.zeev.tarantov@gmail.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From zeev dot tarantov at gmail dot com 2005-03-18 20:36 -------
Created an attachment (id=8420)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8420&action=view)
testcase unexpected output
this is what I get from "gcc -march=i386 -O3 -S -g opcode.c -o opcode.i386.s".
Notice the "movzbl" on line 28. I don't have a 80386 to test it, but I doubt it
supports this.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20540