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NAME

IEEEDPCmp
compare two double precision floating point numbers

SYNOPSIS



c = IEEEDPCmp( y , z );
d0 d0/d1 d2/d3

double y,z;
long c;

FUNCTION

Compare y with z. Set the condition codes for less, greater, or equal. Set return value c to -1 if y<z, or +1 if y>z, or 0 if y == z.

INPUTS

y
IEEE double precision floating point value

z
IEEE double precision floating point value

RESULT

c = 1 cc = gt for (y > z)

c = 0 cc = eq for (y == z)

c = -1 cc = lt for (y < z)

BUGS

did not compare correctly if negative and the MSB of the mantissae were equal. fixed.