Author: Hakan Ardo <[email protected]>
Branch: extradoc
Changeset: r4580:168b011deac8
Date: 2012-08-15 09:43 +0200
http://bitbucket.org/pypy/extradoc/changeset/168b011deac8/
Log: merge
diff --git a/talk/dls2012/paper.tex b/talk/dls2012/paper.tex
--- a/talk/dls2012/paper.tex
+++ b/talk/dls2012/paper.tex
@@ -1070,6 +1070,10 @@
We run GCC with -O3 -march=native, disabling the
automatic loop vectorization. In all cases, SSE2 instructions were used for
floating point operations, except Psyco which uses x87 FPU instructions.
+% Psyco does not use the x87 FPU: all floating-point arithmetic is done with
+% residual calls to C helpers. These can probably be compiled with SSE2.
+% But compiling CPython (and maybe Psyco) for x87 or SSE2 has probably
+% no measurable effect.
We also run PyPy with loop peeling optimization and without (but otherwise
identical).
@@ -1113,7 +1117,7 @@
involves solving data flow problems usually involding bidirection data flow
equations. After improvements~\cite{chow_portable_1984,
dhamdhere_practical_1991} this approach was followed by the work of Knoop
-et.al.~\cite{knoop_lazy_1992} who cleany separated the problem into a backward
+et.al.~\cite{knoop_lazy_1992} who cleanly separated the problem into a backward
and forward data flow analysis. Implementing partial redundancy elimination in
compilers that use SSA form \cite{chow_new_1997} simplified the algorithms
because no iterative data flow analysis is needed any more.
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