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Add -mno-movbe to disable "movbe" instruction from code-gen 

Intruction "movbe" (move data after swapping bytes) is only available in
Intel atom.  Disable it for more general x86 devices and x86 hosts which
run emulator-x86.  Although emulator-x86 can support "movbe", most of
the time we want to run emulator-x86 with VT support for speed (with KVM
in Linux, or HAXM in Windows/MacOSX).  The presence of "movbe" can crash
emulator-x86 in VT because non-atom host doesn't have it natively.

Change-Id: I86e037900ddcb8d544f92b8d8464c8627347e560
This commit is contained in:
Andrew Hsieh 2012-05-18 15:53:35 +08:00
parent feec98b139
commit 112a674798
1 changed files with 5 additions and 0 deletions
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5
core/combo/TARGET_linux-x86.mk
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@ -132,6 +132,11 @@ TARGET_GLOBAL_CFLAGS += -mbionic
#
TARGET_GLOBAL_CFLAGS += -D__ANDROID__
# instructions "movbe" is only available in Intel atom. Disable it
# for general x86 device and x86 host which runs emulator-x86
#
TARGET_GLOBAL_CFLAGS += -mno-movbe
# XXX: This flag is probably redundant since our toolchain binaries already
# generate 32-bit machine code. It probably dates back to the old days
# where we were using the host toolchain on Linux to build the platform