Document what the "rep; nop" x86 assembler sequence is actually equivalent to, and what it is intended to do.
Document what the "rep; nop" x86 assembler sequence is actually equivalent
to, and what it is intended to do.

xinzweb/gpdb,Postgres-XL/Postgres-XL,xinzweb/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,50wu/gpdb,postmind-net/postgres-xl,kaknikhil/gpdb,Chibin/gpdb,royc1/gpdb,oberstet/postgres-xl,zaksoup/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,postmind-net/postgres-xl,kaknikhil/gpdb,janebeckman/gpdb,yazun/postgres-xl,kaknikhil/gpdb,jmcatamney/gpdb,rvs/gpdb,cjcjameson/gpdb,janebeckman/gpdb,zaksoup/gpdb,ahachete/gpdb,pavanvd/postgres-xl,rvs/gpdb,edespino/gpdb,lisakowen/gpdb,0x0FFF/gpdb,yazun/postgres-xl,rubikloud/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,kmjungersen/PostgresXL,Quikling/gpdb,snaga/postgres-xl,yazun/postgres-xl,zaksoup/gpdb,50wu/gpdb,atris/gpdb,lintzc/gpdb,CraigHarris/gpdb,foyzur/gpdb,randomtask1155/gpdb,lintzc/gpdb,jmcatamney/gpdb,rubikloud/gpdb,cjcjameson/gpdb,Postgres-XL/Postgres-XL,rvs/gpdb,atris/gpdb,janebeckman/gpdb,adam8157/gpdb,tangp3/gpdb,chrishajas/gpdb,rvs/gpdb,cjcjameson/gpdb,postmind-net/postgres-xl,yazun/postgres-xl,50wu/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,janebeckman/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,ashwinstar/gpdb,ovr/postgres-xl,techdragon/Postgres-XL,ovr/postgres-xl,ahachete/gpdb,yuanzhao/gpdb,foyzur/gpdb,xuegang/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,jmcatamney/gpdb,kmjungersen/PostgresXL,foyzur/gpdb,tangp3/gpdb,lintzc/gpdb,xuegang/gpdb,0x0FFF/gpdb,tangp3/gpdb,50wu/gpdb,chrishajas/gpdb,randomtask1155/gpdb,kmjungersen/PostgresXL,yuanzhao/gpdb,royc1/gpdb,50wu/gpdb,greenplum-db/gpdb,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,chrishajas/gpdb,xuegang/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,snaga/postgres-xl,edespino/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,tpostgres-projects/tPostgres,adam8157/gpdb,randomtask1155/gpdb,Quikling/gpdb,ovr/postgres-xl,Quikling/gpdb,zeroae/postgres-xl,rvs/gpdb,kmjungersen/PostgresXL,royc1/gpdb,xinzweb/gpdb,tangp3/gpdb,ahachete/gpdb,kmjungersen/PostgresXL,greenplum-db/gpdb,50wu/gpdb,rvs/gpdb,Chibin/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,xinzweb/gpdb,Chibin/gpdb,arcivanov/postgres-xl,ahachete/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,xuegang/gpdb,zaksoup/gpdb,arcivanov/postgres-xl,lintzc/gpdb,edespino/gpdb,kaknikhil/gpdb,rvs/gpdb,chrishajas/gpdb,chrishajas/gpdb,xinzweb/gpdb,postmind-net/postgres-xl,foyzur/gpdb,xinzweb/gpdb,royc1/gpdb,arcivanov/postgres-xl,lpetrov-pivotal/gpdb,foyzur/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,foyzur/gpdb,yuanzhao/gpdb,lintzc/gpdb,jmcatamney/gpdb,janebeckman/gpdb,greenplum-db/gpdb,royc1/gpdb,ashwinstar/gpdb,rubikloud/gpdb,ashwinstar/gpdb,adam8157/gpdb,ovr/postgres-xl,randomtask1155/gpdb,rubikloud/gpdb,cjcjameson/gpdb,Chibin/gpdb,lisakowen/gpdb,royc1/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,xuegang/gpdb,foyzur/gpdb,arcivanov/postgres-xl,zeroae/postgres-xl,edespino/gpdb,cjcjameson/gpdb,atris/gpdb,lisakowen/gpdb,foyzur/gpdb,ahachete/gpdb,rvs/gpdb,zaksoup/gpdb,CraigHarris/gpdb,rubikloud/gpdb,lintzc/gpdb,zeroae/postgres-xl,edespino/gpdb,cjcjameson/gpdb,ovr/postgres-xl,arcivanov/postgres-xl,yuanzhao/gpdb,snaga/postgres-xl,zaksoup/gpdb,zaksoup/gpdb,edespino/gpdb,lpetrov-pivotal/gpdb,cjcjameson/gpdb,lisakowen/gpdb,Quikling/gpdb,50wu/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,adam8157/gpdb,Quikling/gpdb,janebeckman/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,royc1/gpdb,atris/gpdb,Chibin/gpdb,chrishajas/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,Quikling/gpdb,0x0FFF/gpdb,ahachete/gpdb,0x0FFF/gpdb,adam8157/gpdb,Chibin/gpdb,rubikloud/gpdb,ashwinstar/gpdb,edespino/gpdb,edespino/gpdb,lintzc/gpdb,Chibin/gpdb,rvs/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,atris/gpdb,ahachete/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,oberstet/postgres-xl,oberstet/postgres-xl,CraigHarris/gpdb,tangp3/gpdb,50wu/gpdb,xuegang/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,0x0FFF/gpdb,janebeckman/gpdb,tangp3/gpdb,jmcatamney/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,tangp3/gpdb,Quikling/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,tpostgres-projects/tPostgres,xuegang/gpdb,rubikloud/gpdb,techdragon/Postgres-XL,chrishajas/gpdb,Postgres-XL/Postgres-XL,yuanzhao/gpdb,lintzc/gpdb,pavanvd/postgres-xl,Quikling/gpdb,atris/gpdb,atris/gpdb,lisakowen/gpdb,adam8157/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,snaga/postgres-xl,Postgres-XL/Postgres-XL,lintzc/gpdb,zaksoup/gpdb,greenplum-db/gpdb,royc1/gpdb,ahachete/gpdb,yazun/postgres-xl,snaga/postgres-xl,pavanvd/postgres-xl,Quikling/gpdb,edespino/gpdb,xinzweb/gpdb,yuanzhao/gpdb,xuegang/gpdb,postmind-net/postgres-xl,xuegang/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,janebeckman/gpdb,greenplum-db/gpdb,edespino/gpdb,cjcjameson/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,chrishajas/gpdb,atris/gpdb,adam8157/gpdb,arcivanov/postgres-xl,Chibin/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,rvs/gpdb,Quikling/gpdb,greenplum-db/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,randomtask1155/gpdb,randomtask1155/gpdb