Hi,
I just observed that TARGET_FPU is not getting populated, when you do a
build for fpu-hard targets. For fpu-soft targets, it displays TARGET_FPU =
"soft", but for fpu-hard targets, it display TARGET_FPU = "".
For example, for my tune-ppc440e.inc file
DEFAULTTUNE ?= "ppc440e"
require conf/machine/include/powerpc/arch-powerpc.inc
TUNEVALID[ppc440e] = "Enable ppc440e specific processor optimizations"
TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "ppc440e", "-mcpu=440fp",
"", d)}"
AVAILTUNES += "ppc440e"
TUNE_FEATURES_tune-ppc440e = "m32 ppc440e fpu-hard"
TUNE_PKGARCH_tune-ppc440e = "ppc440e"
PACKAGE_EXTRA_ARCHS_tune-ppc440e = "${PACKAGE_EXTRA_ARCHS_tune-powerpc} ppc440e"
# glibc configure options to get ppc440e specific library (for sqrt)
GLIBC_EXTRA_OECONF += "${@bb.utils.contains("TUNE_FEATURES", "ppc440e",
"-with-cpu=440fp", "", d)}"
it is empty:
uild Configuration:
BB_VERSION = "1.15.3"
TARGET_ARCH = "powerpc"
TARGET_OS = "linux"
MACHINE = "virtex5"
DISTRO = "poky"
DISTRO_VERSION = "1.2+snapshot-20120824"
TUNE_FEATURES = "m32 ppc440e fpu-hard"
TARGET_FPU = ""
meta
meta-yocto = "(nobranch):77192ec8ed3563920b969306aaa7609d05184255"
toolchain-layer = "(nobranch):3fd2bf4c5e6c3a353aff9795294b7c25f5f50c49"
meta-xilinx =
"master-xilinx-ml507-gcc-4.5:18ab4890b00d12c58f750008688d2e97687e33da"
Similarily, for my tune-ppc405e.inc file:
DEFAULTTUNE ?= "ppc405e"
require conf/machine/include/powerpc/arch-powerpc.inc
TUNEVALID[ppc405e] = "Enable ppc405e specific processor optimizations"
TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "ppc405e", "-mcpu=405fp",
"", d)}"
AVAILTUNES += "ppc405e"
TUNE_FEATURES_tune-ppc405e = "m32 ppc405e fpu-hard"
TUNE_PKGARCH_tune-ppc405e = "ppc405e"
PACKAGE_EXTRA_ARCHS_tune-ppc405e = "${PACKAGE_EXTRA_ARCHS_tune-powerpc} ppc405e"
# glibc configure options to get ppc405e specific library (for sqrt)
GLIBC_EXTRA_OECONF += "${@bb.utils.contains("TUNE_FEATURES", "ppc405e",
"-with-cpu=405fp", "", d)}"
it is empty:
Build Configuration:
BB_VERSION = "1.15.3"
TARGET_ARCH = "powerpc"
TARGET_OS = "linux"
MACHINE = "virtex5"
DISTRO = "poky"
DISTRO_VERSION = "1.2+snapshot-20120824"
TUNE_FEATURES = "m32 ppc405e fpu-hard"
TARGET_FPU = ""
meta
meta-yocto = "(nobranch):77192ec8ed3563920b969306aaa7609d05184255"
toolchain-layer = "(nobranch):3fd2bf4c5e6c3a353aff9795294b7c25f5f50c49"
meta-xilinx =
"master-xilinx-ml507-gcc-4.5:18ab4890b00d12c58f750008688d2e97687e33da"
The PowerPC405 and 440 processors are on a Xilinx Virtex-4 and Virtex-5 FGPA,
and as such can be attached to a hardware floating point unit.
There is a special gcc compiler option for this situation, which is
-mxilinx-fpu
Perform optimizations for the floating-point unit on Xilinx PPC 405/440. See
RS/6000 and PowerPC Options - Using the GNU Compiler Collection (GCC) for more
information.
What should I do to get TARGET_FPU to fill correctly for hardware floating
point units ?
Best regards,
Elvis Dowson
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