From: Richard Zidlicky <rz@linux-m68k.org>
To: Fabrice Bellard <fabrice@bellard.org>, Qemu ML <qemu-devel@nongnu.org>
Subject: [Qemu-devel] [patch] m68k updates #3
Date: Wed, 17 Mar 2004 19:12:17 +0100 [thread overview]
Message-ID: <20040317181217.GC2562@linux-m68k.org> (raw)
Hi,
this is another patch where I could use some advice.
m68k has hw support for "long double" so I thought
I could easilly improve performance a little bit and
get better precision by using them.
Appended patch shows how I was trying to do this, but
there must be something else I have missed because
regression tests dont work..
Anyway, the change might be usefull if someone else
attempts to do the same for some other arch.
Richard
diff -urN qemu-cvs/target-i386/cpu.h qemu-cvs-new/target-i386/cpu.h
--- qemu-cvs/target-i386/cpu.h Thu Feb 26 00:14:19 2004
+++ qemu-cvs-new/target-i386/cpu.h Wed Mar 17 18:39:40 2004
@@ -252,7 +252,8 @@
CC_OP_NB,
};
-#ifdef __i386__
+/* should work for m68k as well but needs more work somewhere */
+#if defined(__i386__) //|| defined (__mc68000)
#define USE_X86LDOUBLE
#endif
diff -urN qemu-cvs/target-i386/exec.h qemu-cvs-new/target-i386/exec.h
--- qemu-cvs/target-i386/exec.h Thu Feb 26 00:26:33 2004
+++ qemu-cvs-new/target-i386/exec.h Wed Mar 17 18:39:39 2004
@@ -440,7 +440,7 @@
/* XXX: same endianness assumed */
-#ifdef CONFIG_USER_ONLY
+#if defined(CONFIG_USER_ONLY) && defined (__i386__)
static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
{
reply other threads:[~2004-03-17 20:40 UTC|newest]
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