From f215287bd59c28443efe6118e7e958be733ce727 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 16 Mar 2016 07:44:35 -0600 Subject: [PATCH] dhry: Correct dhrystone calculation for fast machines At present samus reports about 5600 DMIPS. With the default iteration count this is OK, but if 10 million runs are performed it overflows. Fix it. Signed-off-by: Simon Glass --- lib/dhry/cmd_dhry.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/lib/dhry/cmd_dhry.c b/lib/dhry/cmd_dhry.c index 5dc191ea62..d7e1e6a99b 100644 --- a/lib/dhry/cmd_dhry.c +++ b/lib/dhry/cmd_dhry.c @@ -6,11 +6,13 @@ #include #include +#include #include "dhry.h" static int do_dhry(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { - ulong start, duration, dhry_per_sec, vax_mips; + ulong start, duration, vax_mips; + u64 dhry_per_sec; int iterations = 1000000; if (argc > 1) @@ -19,10 +21,10 @@ static int do_dhry(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) start = get_timer(0); dhry(iterations); duration = get_timer(start); - dhry_per_sec = iterations * 1000 / duration; + dhry_per_sec = lldiv(iterations * 1000ULL, duration); vax_mips = dhry_per_sec / 1757; printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations, - duration, dhry_per_sec, vax_mips); + duration, (ulong)dhry_per_sec, vax_mips); return 0; } -- 2.39.5