as: s390 Floating Point

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1 9.40.5 Floating Point
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1 The assembler recognizes both the IEEE floating-point instruction and
1 the hexadecimal floating-point instructions.  The floating-point
1 constructors '.float', '.single', and '.double' always emit the IEEE
1 format.  To assemble hexadecimal floating-point constants the '.long'
1 and '.quad' directives must be used.
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