From af211b60bd25fda9d0377936397137d64d51b24e Mon Sep 17 00:00:00 2001 From: lkcl Date: Thu, 24 Dec 2020 06:50:19 +0000 Subject: [PATCH] --- openpower/sv/overview.mdwn | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/openpower/sv/overview.mdwn b/openpower/sv/overview.mdwn index cf735aff4..a26601a0d 100644 --- a/openpower/sv/overview.mdwn +++ b/openpower/sv/overview.mdwn @@ -3,7 +3,7 @@ This document provides a crash-course overview as to why SV exists, and how it works. [SIMD is known to be harmful](https://www.sigarch.org/simd-instructions-considered-harmful/): -a seductive simplicity that is easy to implement in hardware. Without predication, which is common only in 3D GPUs, SIMD only become more and more problematic as the SIMD width increases. +a seductive simplicity that is easy to implement in hardware. Without predication, which is common only in 3D GPUs, SIMD only become more and more problematic with each power of two SIMD width increase. Cray-style variable-length Vectors on the other hand result in stunningly elegant and small loops, with no alarmingly high setup and cleanup code, where at the hardware level the microarchitecture may execute from one element right the way through to tens of thousands at a time, yet the executable remains exactly the same. Unlike in SIMD, powers of two limitations are not involved in either the hardware nor in the assembly code. -- 2.30.2