From bb12e55989e360662d606c016db3471484d5a694 Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Thu, 14 Jun 2007 22:50:21 +0000 Subject: Mandelbrot: slight speedup on coldfire targets. Only noticeable at high iteration depths with full precision. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13631 a1c6a512-1295-4272-9138-f99709370657 --- apps/plugins/mandelbrot.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/apps/plugins/mandelbrot.c b/apps/plugins/mandelbrot.c index fe920cebd4..b1e8587764 100644 --- a/apps/plugins/mandelbrot.c +++ b/apps/plugins/mandelbrot.c @@ -298,19 +298,19 @@ static inline long muls32_asr26(long a, long b) { long r, t1; asm ( - "mac.l %[a],%[b],%%acc0\n" /* multiply */ - "mulu.l %[a],%[b] \n" /* get lower half */ - "movclr.l %%acc0,%[r] \n" /* get higher half */ - "asl.l #5,%[r] \n" /* hi <<= 5, plus one free */ - "moveq.l #26,%[t1] \n" - "lsr.l %[t1],%[b] \n" /* (unsigned)lo >>= 26 */ - "or.l %[b],%[r] \n" /* combine result */ + "mac.l %[a], %[b], %%acc0 \n" /* multiply */ + "move.l %%accext01, %[t1] \n" /* get low part */ + "movclr.l %%acc0, %[r] \n" /* get high part */ + "asl.l #5, %[r] \n" /* hi <<= 5, plus one free */ + "lsr.l #3, %[t1] \n" /* lo >>= 3 */ + "and.l #0x1f, %[t1] \n" /* mask out unrelated bits */ + "or.l %[t1], %[r] \n" /* combine result */ : /* outputs */ - [r]"=&d"(r), - [t1]"=&d"(t1), - [b] "+d" (b) + [r] "=d"(r), + [t1]"=d"(t1) : /* inputs */ - [a] "d" (a) + [a] "d" (a), + [b] "d" (b) ); return r; } -- cgit v1.2.3