From 993e3107af67edefcfc79a62ae55f7b98aa5151e Mon Sep 17 00:00:00 2001
From: Uros Bizjak <ubizjak@gmail.com>
Date: Mon, 1 Apr 2019 15:58:37 +0700
Subject: alpha: Improve sysdeps/alpha/divqu.S and sysdeps/alpha/remqu.S
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	* sysdeps/alpha/divqu.S (__divqu): Move save of $f0 and excb after
	conditional branch to DIVBYZERO.  Fix unwind info.
	* sysdeps/alpha/remqu.S (__remqu): Move saves of $f0, $f1, $f2 and
	excb after conditional branch to $powerof2.  Add missing unop
	instructions and .align directives and reorder instructions to
	match __divqu.

Signed-off-by: Uroš Bizjak <ubizjak@gmail.com>
---
 sysdeps/alpha/divqu.S |  7 ++++---
 sysdeps/alpha/remqu.S | 12 +++++++-----
 2 files changed, 11 insertions(+), 8 deletions(-)

(limited to 'sysdeps/alpha')

diff --git a/sysdeps/alpha/divqu.S b/sysdeps/alpha/divqu.S
index f5cedd0..3165374 100644
--- a/sysdeps/alpha/divqu.S
+++ b/sysdeps/alpha/divqu.S
@@ -56,10 +56,10 @@ __divqu:
 	   that's done, we have at least 22 cycles until its results are
 	   ready -- all the time in the world to figure out how we're
 	   going to use the results.  */
-	stt	$f0, 0(sp)
-	excb
 	beq	Y, DIVBYZERO
 
+	stt	$f0, 0(sp)
+	excb
 	stt	$f1, 8(sp)
 	stt	$f3, 48(sp)
 	cfi_rel_offset ($f0, 0)
@@ -70,6 +70,7 @@ __divqu:
 	_ITOFT2	X, $f0, 16, Y, $f1, 24
 	cvtqt	$f0, $f0
 	cvtqt	$f1, $f1
+
 	blt	X, $x_is_neg
 	divt/c	$f0, $f1, $f0
 
@@ -90,12 +91,12 @@ __divqu:
 
 	ldt	$f0, 0(sp)
 	ldt	$f3, 48(sp)
+	lda	sp, FRAME(sp)
 	cfi_remember_state
 	cfi_restore ($f0)
 	cfi_restore ($f1)
 	cfi_restore ($f3)
 	cfi_def_cfa_offset (0)
-	lda	sp, FRAME(sp)
 	ret	$31, (RA), 1
 
 	.align	4
diff --git a/sysdeps/alpha/remqu.S b/sysdeps/alpha/remqu.S
index a240ee9..3b6a62d 100644
--- a/sysdeps/alpha/remqu.S
+++ b/sysdeps/alpha/remqu.S
@@ -57,19 +57,19 @@ __remqu:
 	   ready -- all the time in the world to figure out how we're
 	   going to use the results.  */
 	subq	Y, 1, AT
-	stt	$f0, 0(sp)
 	and	Y, AT, AT
+	beq	AT, $powerof2
 
-	stt	$f1, 8(sp)
+	stt	$f0, 0(sp)
 	excb
+	stt	$f1, 8(sp)
 	stt	$f3, 48(sp)
-	beq	AT, $powerof2
 	cfi_rel_offset ($f0, 0)
 	cfi_rel_offset ($f1, 8)
 	cfi_rel_offset ($f3, 48)
+	mf_fpcr	$f3
 
 	_ITOFT2	X, $f0, 16, Y, $f1, 24
-	mf_fpcr	$f3
 	cvtqt	$f0, $f0
 	cvtqt	$f1, $f1
 
@@ -116,11 +116,13 @@ $x_is_neg:
 	cfi_rel_offset ($f2, 24)
 	_ITOFS	AT, $f2, 16
 
+	.align	4
 	addt	$f0, $f2, $f0
+	unop
 	divt/c	$f0, $f1, $f0
+	unop
 
 	/* Ok, we've now the divide issued.  Continue with other checks.  */
-	.align	4
 	ldt	$f1, 8(sp)
 	unop
 	ldt	$f2, 24(sp)
-- 
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