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72dfddeffc
This patch lays out the top-level organisation of the RISC-V 32-bit port. It provides all the Implies files as well as various other fragments of the build infrastructure. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
68 lines
1.4 KiB
Plaintext
68 lines
1.4 KiB
Plaintext
case "$machine" in
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riscv*)
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xlen=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_xlen \(.*\)/\1/p'`
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flen=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_flen \(.*\)/\1/p'`
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float_abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_float_abi_\([^ ]*\) .*/\1/p'`
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atomic=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | grep '#define __riscv_atomic' | cut -d' ' -f2`
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case "$xlen" in
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64 | 32)
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;;
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*)
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echo "Unable to determine XLEN" >&2
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exit 1
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;;
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esac
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case "$flen" in
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64)
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float_machine=rvd
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with_fp_cond=1
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;;
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32)
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echo "glibc does not yet support systems with the F but not D extensions" >&2
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exit 1
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;;
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"")
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with_fp_cond=0
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;;
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*)
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echo "Unable to determine FLEN" >&2
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exit 1
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;;
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esac
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case "$float_abi" in
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soft)
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abi_flen=0
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;;
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single)
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echo "glibc does not yet support the single floating-point ABI" >&2
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exit 1
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;;
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double)
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abi_flen=64
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;;
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*)
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echo "Unable to determine floating-point ABI" >&2
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exit 1
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;;
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esac
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case "$atomic" in
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__riscv_atomic)
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;;
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*)
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echo "glibc requires the A extension" >&2
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exit 1
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;;
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esac
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base_machine=riscv
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machine=riscv/rv$xlen/$float_machine
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$as_echo "#define RISCV_ABI_XLEN $xlen" >>confdefs.h
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$as_echo "#define RISCV_ABI_FLEN $abi_flen" >>confdefs.h
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;;
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esac
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