===================================================================
RCS file: /home/cvs/OpenXM_contrib/gmp/mpn/x86/Attic/copyi.asm,v
retrieving revision 1.1.1.1
retrieving revision 1.1.1.2
diff -u -p -r1.1.1.1 -r1.1.1.2
--- OpenXM_contrib/gmp/mpn/x86/Attic/copyi.asm	2000/09/09 14:12:42	1.1.1.1
+++ OpenXM_contrib/gmp/mpn/x86/Attic/copyi.asm	2003/08/25 16:06:27	1.1.1.2
@@ -1,7 +1,6 @@
 dnl  x86 mpn_copyi -- copy limb vector, incrementing.
 
-
-dnl  Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+dnl  Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
 dnl 
 dnl  This file is part of the GNU MP Library.
 dnl 
@@ -20,10 +19,19 @@ dnl  License along with the GNU MP Library; see the fi
 dnl  not, write to the Free Software Foundation, Inc., 59 Temple Place -
 dnl  Suite 330, Boston, MA 02111-1307, USA.
 
-
 include(`../config.m4')
 
 
+C     cycles/limb  startup (approx)
+C P5:     1.0         35
+C P6      0.75        45
+C K6      1.0         30
+C K7:     1.3         65
+C P4:     1.0        120
+C
+C (Startup time includes some function call overheads.)
+
+
 C void mpn_copyi (mp_ptr dst, mp_srcptr src, mp_size_t size);
 C
 C Copy src,size to dst,size, working from low to high addresses.
@@ -31,21 +39,24 @@ C
 C The code here is very generic and can be expected to be reasonable on all
 C the x86 family.
 C
-C P5 - 1.0 cycles/limb.
+C P6 -  An MMX based copy was tried, but was found to be slower than a rep
+C       movs in all cases.  The fastest MMX found was 0.8 cycles/limb (when
+C       fully aligned).  A rep movs seems to have a startup time of about 15
+C       cycles, but doing something special for small sizes could lead to a
+C       branch misprediction that would destroy any saving.  For now a plain
+C       rep movs seems ok.
 C
-C P6 - 0.75 cycles/limb.  An MMX based copy was tried, but was found to be
-C      slower than a rep movs in all cases.  The fastest MMX found was 0.8
-C      cycles/limb (when fully aligned).  A rep movs seems to have a startup
-C      time of about 15 cycles, but doing something special for small sizes
-C      could lead to a branch misprediction that would destroy any saving.
-C      For now a plain rep movs seems ok for P6.
+C K62 - We used to have a big chunk of code doing an MMX copy at 0.56 c/l if
+C       aligned or a 1.0 rep movs if not.  But that seemed excessive since
+C       it only got an advantage half the time, and even then only showed it
+C       above 50 limbs or so.
 
 defframe(PARAM_SIZE,12)
 defframe(PARAM_SRC, 8)
 defframe(PARAM_DST, 4)
 deflit(`FRAME',0)
 
-	.text
+	TEXT
 	ALIGN(32)
 
 	C eax	saved esi
@@ -66,7 +77,7 @@ PROLOGUE(mpn_copyi)
 
 	movl	PARAM_DST, %edi
 
-	cld	C better safe than sorry, see mpn/x86/README.family
+	cld	C better safe than sorry, see mpn/x86/README
 
 	rep
 	movsl