marc@spix7.depr.bull.fr ( Marc PARIGOT ) (12/18/89)
Hello,
I'm looking, for RPC purpose, a simple and fast way to convert IBM floatting point format number into IEEE format number and vice-versa:
------------------------- ----------------------------
|s| exp | mantissa | <==> | mantissa | exp |s|
------------------------- ----------------------------
fibm fieee
fibm = (-1)**s * (16)**(exp1-64) * mantissa1
fieee = (-1)**s * 2**(exp2-127) * mantissa2
ibm_to_ieee(exp1, mantissa1, &exp2, &mantissa2);
ieee_to_ibm(exp2, mantissa2, &exp1, &mantissa1);
Thanks for your time.
Marc (E.mail: Marc.Parigot@depr.bull.fr)marc@bpe2.spix7.depr.bull.FR (Marc PARIGOT) (12/18/89)
Hello,
I'm looking, for RPC purpose, a simple and fast way to convert IBM floatting
point format number into IEEE format number and vice-versa:
------------------------- ----------------------------
|s| exp | mantissa | <==> | mantissa | exp |s|
------------------------- ----------------------------
fibm fieee
fibm = (-1)**s * (16)**(exp1-64) * mantissa1
fieee = (-1)**s * 2**(exp2-127) * mantissa2
ibm_to_ieee(exp1, mantissa1, &exp2, &mantissa2);
ieee_to_ibm(exp2, mantissa2, &exp1, &mantissa1);
Thanks for your time.
Marc (E.mail: Marc.Parigot@depr.bull.fr)ehrlich@cs.psu.edu (Daniel Ehrlich) (12/20/89)
In article <229@bull.bull.fr> marc@spix7.depr.bull.fr ( Marc PARIGOT ) writes:
Marc> I'm looking, for RPC purpose, a simple and fast way to convert IBM
Marc> floatting point format number into IEEE format number and vice-versa:
Marc> ------------------------- ----------------------------
Marc> |s| exp | mantissa | <==> | mantissa | exp |s|
Marc> ------------------------- ----------------------------
Marc> fibm fieee
Marc> fibm = (-1)**s * (16)**(exp1-64) * mantissa1
Marc> fieee = (-1)**s * 2**(exp2-127) * mantissa2
Marc> ibm_to_ieee(exp1, mantissa1, &exp2, &mantissa2);
Marc> ieee_to_ibm(exp2, mantissa2, &exp1, &mantissa1);
You should be able to use the XDR routines that come with the SUN RPC
library. The convert from `native' numbers to IEEE floating point and back.
Not sure where they are documented in IBM land, but they are in the Network
Programming manual for a Sun.
--
Dan Ehrlich <ehrlich@cs.psu.edu>
Quote of the month:
"And I have quite a bit of experience on mainframes. I learned C, Pascal,
and Assembler on various mainframes, including PDPs, VAXen, an IBM AS/9000."
-- Charles M Hannum II <c9h@hcx.psu.edu>news@PSUVAX1.CS.PSU.EDU (Daniel Ehrlich) (12/20/89)
In article <229@bull.bull.fr> marc@spix7.depr.bull.fr ( Marc PARIGOT ) writes:
Marc> I'm looking, for RPC purpose, a simple and fast way to convert IBM
Marc> floatting point format number into IEEE format number and vice-versa:
Marc> ------------------------- ----------------------------
Marc> |s| exp | mantissa | <==> | mantissa | exp |s|
Marc> ------------------------- ----------------------------
Marc> fibm fieee
Marc> fibm = (-1)**s * (16)**(exp1-64) * mantissa1
Marc> fieee = (-1)**s * 2**(exp2-127) * mantissa2
Marc> ibm_to_ieee(exp1, mantissa1, &exp2, &mantissa2);
Marc> ieee_to_ibm(exp2, mantissa2, &exp1, &mantissa1);
You should be able to use the XDR routines that come with the SUN RPC
library. The convert from `native' numbers to IEEE floating point and back.
Not sure where they are documented in IBM land, but they are in the Network
Programming manual for a Sun.
--
Dan Ehrlich <ehrlich@cs.psu.edu>
Quote of the month:
"And I have quite a bit of experience on mainframes. I learned C, Pascal,
and Assembler on various mainframes, including PDPs, VAXen, an IBM AS/9000."
-- Charles M Hannum II <c9h@hcx.psu.edu>