Abdulaziz Ghuloum <[EMAIL PROTECTED]> writes: > On Sep 18, 2007, at 11:15 AM, Michael Sperber wrote: > >>> Also, is there a good reason for restricting the range of the second >>> argument to be less than (fixnum-width)? >> >> Well, if that weren't there, you'd get an exception anyway, except for >> 0, no? > > No actually. > > First, the restriction on the range of the second argument is not > sufficient to avoid exceptions. (fxarithmetic-shift -72736 17) should > raise an exception even through |17| < (fixnum-width).
You're right. Still, the restriction is intentional. As Kent pointed out to me in private email (I hope it's OK I quote this): >> The ia32 and Sparc architectures ignore all but the low-order 5 bits >> when shifting 32-bit words. [...] The same would be true on the PowerPC, >> which ignores all but the low-order 6 bits. -- Cheers =8-} Mike Friede, Völkerverständigung und überhaupt blabla _______________________________________________ r6rs-discuss mailing list [email protected] http://lists.r6rs.org/cgi-bin/mailman/listinfo/r6rs-discuss
