From aa173d5f30ea45f0c06799c858c4a91681cf0cf7 Mon Sep 17 00:00:00 2001
From: rich <rich>
Date: Thu, 11 Oct 2007 07:45:35 +0000
Subject: [PATCH] Wrote code to do performance comparisons.

---
 Makefile       |  9 +++++---
 perf_dupdrop.f | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 74 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index f5a7494..d47b4d2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.7 2007-10-10 13:01:05 rich Exp $
+# $Id: Makefile,v 1.8 2007-10-11 07:45:35 rich Exp $
 
 SHELL	:= /bin/bash
 
@@ -11,7 +11,7 @@ run:
 	cat jonesforth.f $(PROG) - | ./jonesforth
 
 clean:
-	rm -f jonesforth *~ core .test_*
+	rm -f jonesforth perf_dupdrop *~ core .test_*
 
 # Tests.
 
@@ -34,8 +34,11 @@ test_%.test: test_%.f jonesforth
 perf_dupdrop: perf_dupdrop.c
 	gcc -O3 -Wall -Werror -o $@ $<
 
+run_perf_dupdrop: jonesforth
+	cat <(echo ': TEST-MODE ;') jonesforth.f perf_dupdrop.f | ./jonesforth
+
 .SUFFIXES: .f .test
-.PHONY: test check
+.PHONY: test check run run_perf_dupdrop
 
 remote:
 	scp jonesforth.S jonesforth.f rjones@oirase:Desktop/
diff --git a/perf_dupdrop.f b/perf_dupdrop.f
index 8b0d911..9841538 100644
--- a/perf_dupdrop.f
+++ b/perf_dupdrop.f
@@ -1,5 +1,72 @@
 ( -*- text -*-
   FORTH repeated DUP DROP * 1000 using ordinary indirect threaded code
   and the assembler primitives.
-  $Id: perf_dupdrop.f,v 1.1 2007-10-10 13:01:05 rich Exp $ )
+  $Id: perf_dupdrop.f,v 1.2 2007-10-11 07:45:35 rich Exp $ )
 
+1024 32 * MORECORE
+
+( Print the time passed. )
+: PRINT-TIME	( lsb msb lsb msb -- lsb lsb )
+	( The test is very short so likely the MSBs will be the same.  This
+	  makes calculating the time easier (because we can only do 32 bit
+	    subtraction).  So check MSBs are equal. )
+	2 PICK <> IF
+		." MSBs not equal, please repeat the test" CR
+	ELSE
+		NIP
+		SWAP - U. CR
+	THEN
+;
+
+: PERFORM-TEST	( xt -- )
+	( Get everything in the cache. )
+	DUP EXECUTE DUP EXECUTE DUP EXECUTE DUP EXECUTE DUP EXECUTE DUP EXECUTE
+	0 0 0 0 PRINT-TIME
+	( Run the test 10 times. )
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DUP EXECUTE PRINT-TIME
+	DROP
+;
+
+( ---------------------------------------------------------------------- )
+( Make a word which builds the repeated DUP DROP sequence. )
+: MAKE-DUPDROP	( n -- )
+	BEGIN ?DUP WHILE ' DUP , ' DROP , 1- REPEAT
+;
+
+( Now the actual test routine. )
+: TEST		( -- startlsb startmsb endlsb endmsb )
+	RDTSC			( Start time )
+	[ 1000 MAKE-DUPDROP ]	( 1000 * DUP DROP )
+	RDTSC			( End time )
+;
+
+: RUN ['] TEST PERFORM-TEST ;
+RUN
+
+( ---------------------------------------------------------------------- )
+( Try the inlined alternative. )
+
+( Inline the assembler primitive (cfa) n times. )
+: *(INLINE) ( cfa n -- )
+	BEGIN ?DUP WHILE OVER (INLINE) 1- REPEAT DROP
+;
+
+: DUPDROP INLINE DUP INLINE DROP ;CODE
+
+: TEST
+	INLINE RDTSC
+	[ S" DUPDROP" FIND >CFA 1000 *(INLINE) ]
+	INLINE RDTSC
+;CODE
+
+: RUN ['] TEST PERFORM-TEST ;
+RUN
-- 
1.8.3.1