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immediate value. (md_assemble): If the size is 'B', set fx_signed. (md_apply_fix_2): Use fx_signed when checking for overflow. * write.h (struct fix): Add fx_signed field. * write.c (fix_new_internal): Initialize fx_no_overflow and fx_signed fields. (fixup_segment): Use fx_signed when checking for overflow. * config/obj-coff.c (fixup_segment): Check fx_no_overflow and fx_signed when checking for overflow.