From 5fabb88a7816f19090384e45bb8f2a22c7f290fb Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Sun, 17 Apr 2011 12:46:00 +0000
Subject: Multiple assembler packs: add experimental memory bus
 instrumentation.

---
 crypto/alphacpuid.pl | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

(limited to 'crypto/alphacpuid.pl')

diff --git a/crypto/alphacpuid.pl b/crypto/alphacpuid.pl
index c9474ff497..11f2e30ce0 100644
--- a/crypto/alphacpuid.pl
+++ b/crypto/alphacpuid.pl
@@ -126,3 +126,93 @@ OPENSSL_cleanse:
 .Ldone: ret	($26)
 .end	OPENSSL_cleanse
 ___
+{
+my ($out,$cnt,$max)=("\$16","\$17","\$18");
+my ($tick,$lasttick)=("\$19","\$20");
+my ($diff,$lastdiff)=("\$21","\$22");
+my ($v0,$ra,$sp,$zero)=("\$0","\$26","\$30","\$31");
+
+print <<___;
+.globl	OPENSSL_instrument_bus
+.ent	OPENSSL_instrument_bus
+OPENSSL_instrument_bus:
+	.frame	$sp,0,$ra
+	.prologue 0
+	mov	$cnt,$v0
+
+	rpcc	$lasttick
+	mov	0,$diff
+
+	ecb	($out)
+	ldl_l	$tick,0($out)
+	addl	$diff,$tick,$tick
+	mov	$tick,$diff
+	stl_c	$tick,0($out)
+	stl	$diff,0($out)
+
+.Loop:	rpcc	$tick
+	subq	$tick,$lasttick,$diff
+	mov	$tick,$lasttick
+
+	ecb	($out)
+	ldl_l	$tick,0($out)
+	addl	$diff,$tick,$tick
+	mov	$tick,$diff
+	stl_c	$tick,0($out)
+	stl	$diff,0($out)
+
+	subl	$cnt,1,$cnt
+	lda	$out,4($out)
+	bne	$cnt,.Loop
+
+	ret	($ra)
+.end	OPENSSL_instrument_bus
+
+.globl	OPENSSL_instrument_bus2
+.ent	OPENSSL_instrument_bus2
+OPENSSL_instrument_bus2:
+	.frame	$sp,0,$ra
+	.prologue 0
+	mov	$cnt,$v0
+
+	rpcc	$lasttick
+	mov	0,$diff
+
+	ecb	($out)
+	ldl_l	$tick,0($out)
+	addl	$diff,$tick,$tick
+	mov	$tick,$diff
+	stl_c	$tick,0($out)
+	stl	$diff,0($out)
+
+	rpcc	$tick
+	subq	$tick,$lasttick,$diff
+	mov	$tick,$lasttick
+	mov	$diff,$lastdiff
+.Loop2:
+	ecb	($out)
+	ldl_l	$tick,0($out)
+	addl	$diff,$tick,$tick
+	mov	$tick,$diff
+	stl_c	$tick,0($out)
+	stl	$diff,0($out)
+
+	subl	$max,1,$max
+	beq	$max,.Ldone2
+
+	rpcc	$tick
+	subq	$tick,$lasttick,$diff
+	mov	$tick,$lasttick
+	subq	$lastdiff,$diff,$tick
+	mov	$diff,$lastdiff
+	cmovne	$tick,1,$tick
+	subl	$cnt,$tick,$cnt
+	s4addq	$tick,$out,$out
+	bne	$cnt,.Loop2
+
+.Ldone2:
+	subl	$v0,$cnt,$v0
+	ret	($ra)
+.end	OPENSSL_instrument_bus2
+___
+}
-- 
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