From 0b77290f582f7730543f7048d632c6e811fde304 Mon Sep 17 00:00:00 2001
From: Kevin Ryde <user42@zip.com.au>
Date: Sun, 13 May 2001 02:15:06 +0200
Subject: Add ppc630 mpn_lshift by 1 using adde.

---
 doc/tasks.html | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'doc')

diff --git a/doc/tasks.html b/doc/tasks.html
index 44913eb71..955cb51f0 100644
--- a/doc/tasks.html
+++ b/doc/tasks.html
@@ -265,6 +265,9 @@
      as <code>mpn_lshift</code>.  Some judicious use of m4 might let the two
      share source code, or with a register to control the loop direction
      perhaps even share object code.
+<li> PPC630: <code>mpn_lshift</code> could use an <code>adde</code> for a
+     shift-by-1.  A simple loop seems to be about 1.4 c/l, compared to 1.6 for
+     the unrolled general case.
 <li> Implement <code>mpn_mul_basecase</code> and <code>mpn_sqr_basecase</code>
      for important machines.  Helping the generic sqr_basecase.c with an
      <code>mpn_sqr_diagonal</code> might be enough for some of the RISCs.
-- 
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