By: Eric Bron (eric.bron.delete@this.zvisuel.privatefortest.com), November 16, 2012 9:47 am
Room: Moderated Discussions
> I think it was only 128-bit in the first place (I mean the internal datapath here).
My understanding is that VEX.256 packed divides and square roots are processed as 2 x 128-bit operations on Sandy Bridge (there is a single division unit in a single 128-bit stack, unlike FP ADD/FP MUL) but as a single operation on Ivy Bridge (there is 2 division units in two 128-bit stacks, like FP ADD/FP MUL)
My understanding is that VEX.256 packed divides and square roots are processed as 2 x 128-bit operations on Sandy Bridge (there is a single division unit in a single 128-bit stack, unlike FP ADD/FP MUL) but as a single operation on Ivy Bridge (there is 2 division units in two 128-bit stacks, like FP ADD/FP MUL)
