Load-store unit and method of loading and storing single-precisi

Details Load-store unit and method of loading and storing single-precisi Load-store unit and method of loading and storing single-precisi

1997-03-11

1998-09-08

Ngo, Chuong Dinh

Boots, shoes, and leggings

36474801, G06F 700, G06F 738

Patent

active

058054758

ABSTRACT:
A floating point numbers load-store unit includes a translator for converting between the single-precision and double-precision representations, and Special-Case logic for providing Special-Case signals when a store is being performed on zero, infinity, or NaN. A store-float-double instruction is executed by concatenating a suffix to the mantissa in the single-precision floating-point register and replacing the high-order bit of the exponent with a prefix selected as a function of the high-order bit, wherein the resulting mantissa and exponent form a double-precision floating-point number that is then stored to memory. A load-float-double instruction is executed by dropping the suffix from the mantissa of the double-precision floating-point number in memory, and replacing the prefix with the high-order bit, wherein the resulting mantissa and exponent form a single-precision floating-point number that is then loaded into the single-precision floating-point register.

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