Hello Matt, Thursday, November 24, 2005, 7:52:23 AM, you wrote:
int64ToWord64# = unsafeCoerce# word64ToInt64# = unsafeCoerce#
M> (W32# x#) + (W32# y#) = W32# (narrow32Word# (x# `plusWord#` y#)) M> (W64# x#) + (W64# y#) = W64# (int64ToWord64# (word64ToInt64# x# M> `plusInt64#` word64ToInt64# y#)) M> The definitions are those used on a 32-bit architecture. So, when it is M> cheap the plusWord# function is used, but when it is "relatively expensive" M> then extra conversions are added. Wouldn't it make sense to avoid the M> conversions in all cases, regardless of whether they are free or not? i'm agree that code simplification you already done is anyway Right Thing. so it's better to apply your patch AND add abovementioned definitions to help any other operations. about int32ToWord32# and so on - they are defined through stg primitives, so anyway defining them as unsafeCoerce# must make things a little faster -- Best regards, Bulat mailto:bulatz@HotPOP.com