From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 3 Apr 2023 13:16:30 +0000 (+0100)
Subject: add sigarch SIMD considered harmful link to ls010
X-Git-Tag: opf_rfc_ls012_v1~156
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bc2ddbf769e05f4a54b0310aebd1d58a4d3f7f17;p=libreriscv.git

add sigarch SIMD considered harmful link to ls010
---

diff --git a/openpower/sv/rfc/ls010.mdwn b/openpower/sv/rfc/ls010.mdwn
index 21d81e71b..ff3b72abe 100644
--- a/openpower/sv/rfc/ls010.mdwn
+++ b/openpower/sv/rfc/ls010.mdwn
@@ -1,6 +1,7 @@
 # RFC ls010 SVP64 Zero-Overhead Loop Prefix Subsystem
 **URLs**:
 
+* <https://www.sigarch.org/simd-instructions-considered-harmful/>
 * <https://libre-soc.org/openpower/sv/>
 * <https://libre-soc.org/openpower/sv/rfc/ls010/>
 * <https://bugs.libre-soc.org/show_bug.cgi?id=1045>
@@ -62,16 +63,18 @@
 
 **Motivation**
 
-SIMD is getting out of control and damaging the reputation of mainstream
-general-purpose ISAs that offer it.  A solution from 50 years ago exists
-in the form of Cray-Style True-Scalable Vectors.  However the usual way that
-True-Scalable Vector ISAs are done *also* adds more instructions and
-complexifies the ISA.  Simple-V takes a step back to a simpler era in
-computing from half a century ago: the Zilog Z80 CPIR and LDIR instructions,
-and the 8086 REP instruction, and brings them forward to Modern-day Computing.
-The result is a huge reduction in programming complexity, and a strong
-base to project the Power ISA back to the most powerful Supercomputing ISA
-for at least the next two decades.
+Just at the time when customers are asking for higher performance,
+the seductive lure of SIMD, as outlined in the sigarch "SIMD Considered
+Harmful" article is getting out of control and damaging the reputation
+of mainstream general-purpose ISAs that offer it.  A solution from
+50 years ago exists in the form of Cray-Style True-Scalable Vectors.
+However the usual way that True-Scalable Vector ISAs are done *also*
+adds more instructions and complexifies the ISA.  Simple-V takes a step
+back to a simpler era in computing from half a century ago: the Zilog
+Z80 CPIR and LDIR instructions, and the 8086 REP instruction, and brings
+them forward to Modern-day Computing.  The result is a huge reduction in
+programming complexity, and a strong base to project the Power ISA back
+to the most powerful Supercomputing ISA for at least the next two decades.
 
 **Notes and Observations**: