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The open coded access to co-processor #10 to set FPEXC is not supported by the CLANG assembler, but the architecturally correct VMSR instruction is not supported by older binutils. So keep the former unless __clang__ is defined. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19282 6f19259b-4bc3-4df7-8a09-765794883524