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From: "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/26674] missed optimization / 128-bit arithmetic.
Date: Wed, 20 Feb 2008 09:48:00 -0000 [thread overview]
Message-ID: <20080220094806.2025.qmail@sourceware.org> (raw)
In-Reply-To: <bug-26674-7667@http.gcc.gnu.org/bugzilla/>
------- Comment #4 from pluto at agmk dot net 2008-02-20 09:48 -------
4.2.3 produces:
sqr_1: xorl %edx, %edx # 45 *movdi_xor_rex64 [length = 2]
movq %rdi, %rax # 11 *movdi_1_rex64/2 [length = 6]
movq %rdx, %rcx # 40 *movdi_1_rex64/2 [length = 6]
imulq %rdi, %rcx # 15 *muldi3_1_rex64/3 [length = 4]
mulq %rdi # 18 *umulditi3_insn [length = 3]
addq %rcx, %rcx # 17 *ashldi3_1_rex64/1 [length = 4]
addq %rdx, %rcx # 19 *adddi_1_rex64/1 [length = 3]
movq %rcx, %rdx # 20 *movdi_1_rex64/2 [length = 6]
ret # 43 return_internal [length = 1]
4.3-svn:
sqr_1: movq %rdi, %rax # 35 *movdi_1_rex64/2 [length = 6]
mulq %rdi # 13 *umulditi3_insn [length = 3]
ret # 41 return_internal [length = 1]
--
pluto at agmk dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail|4.1.2 4.2.0 |4.1.2 4.2.3
Known to work| |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26674
next prev parent reply other threads:[~2008-02-20 9:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-14 12:07 [Bug other/26674] New: " pluto at agmk dot net
2006-03-14 13:25 ` [Bug target/26674] " pinskia at gcc dot gnu dot org
2006-03-14 13:58 ` rguenth at gcc dot gnu dot org
2006-03-14 14:00 ` rguenth at gcc dot gnu dot org
2006-10-22 17:44 ` pluto at agmk dot net
2008-02-20 9:48 ` pluto at agmk dot net [this message]
2008-04-21 7:26 ` ubizjak at gmail dot com
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