Merge "Add a 32-bit x86_64 arch variant"

# This file is used as the second (32-bit) architecture when building a generic

# x86_64 64-bit platform image. (full_x86_64-eng / sdk_x86_64-eng)

#

# The generic 'x86' variant cannot be used, since it resets some flags used

# by the 'x86_64' variant.

ARCH_X86_HAVE_SSSE3 := true

ARCH_X86_HAVE_MOVBE := false # Only supported on Atom.

ARCH_X86_HAVE_POPCNT := true

ARCH_X86_HAVE_SSE4 := true

ARCH_X86_HAVE_SSE4_1 := true

ARCH_X86_HAVE_SSE4_2 := true

# Some intrinsic functions used by libcxx only exist for prescott or newer CPUs.

arch_variant_cflags := \

    -march=prescott \

TARGET_2ND_CPU_ABI := x86

TARGET_2ND_ARCH := x86

TARGET_2ND_ARCH_VARIANT := x86

TARGET_2ND_ARCH_VARIANT := x86_64

TARGET_USES_64_BIT_BINDER := true