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Re: Fast way to get the sign of a floating point number?

The SETcc family of instructions will set the AL register to 0 or 1 depending on the current condition flags. Combined with a suitable comparison instruction, this will return a boolean. A good compiler will do this for you, though, with this function:

inline bool isSigned(float f) { return f < 0.0f; }

Best regards,
Frederik Slijkerman

----- Original Message ----- From: <email@hidden>
To: <email@hidden>
Sent: Tuesday, November 29, 2005 22:48
Subject: Re: Fast way to get the sign of a floating point number?


Is there an equivalent instruction to fsel on Intel machines?

thanks
Jeff

>Err... wouldn't it need to be sign = __fsel( v, -1.0, 1.0 )?

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