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From: Janosch Frank <frankja@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org, thuth@redhat.com, david@redhat.com,
	pmorel@linux.ibm.com
Subject: [kvm-unit-tests PATCH] s390x: Use loop to save and restore fprs
Date: Mon,  4 Nov 2019 03:55:33 -0500	[thread overview]
Message-ID: <20191104085533.2892-1-frankja@linux.ibm.com> (raw)

Let's save some lines in the assembly by using a loop to save and
restore the fprs.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 s390x/cstart64.S | 38 ++++++--------------------------------
 1 file changed, 6 insertions(+), 32 deletions(-)

diff --git a/s390x/cstart64.S b/s390x/cstart64.S
index 5dc1577..8e2b21e 100644
--- a/s390x/cstart64.S
+++ b/s390x/cstart64.S
@@ -99,44 +99,18 @@ memsetxc:
 	lctlg	%c0, %c0, 0(%r1)
 	/* save fprs 0-15 + fpc */
 	la	%r1, GEN_LC_SW_INT_FPRS
-	std	%f0, 0(%r1)
-	std	%f1, 8(%r1)
-	std	%f2, 16(%r1)
-	std	%f3, 24(%r1)
-	std	%f4, 32(%r1)
-	std	%f5, 40(%r1)
-	std	%f6, 48(%r1)
-	std	%f7, 56(%r1)
-	std	%f8, 64(%r1)
-	std	%f9, 72(%r1)
-	std	%f10, 80(%r1)
-	std	%f11, 88(%r1)
-	std	%f12, 96(%r1)
-	std	%f13, 104(%r1)
-	std	%f14, 112(%r1)
-	std	%f15, 120(%r1)
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	std	\i, \i * 8(%r1)
+	.endr
 	stfpc	GEN_LC_SW_INT_FPC
 	.endm
 
 	.macro RESTORE_REGS
 	/* restore fprs 0-15 + fpc */
 	la	%r1, GEN_LC_SW_INT_FPRS
-	ld	%f0, 0(%r1)
-	ld	%f1, 8(%r1)
-	ld	%f2, 16(%r1)
-	ld	%f3, 24(%r1)
-	ld	%f4, 32(%r1)
-	ld	%f5, 40(%r1)
-	ld	%f6, 48(%r1)
-	ld	%f7, 56(%r1)
-	ld	%f8, 64(%r1)
-	ld	%f9, 72(%r1)
-	ld	%f10, 80(%r1)
-	ld	%f11, 88(%r1)
-	ld	%f12, 96(%r1)
-	ld	%f13, 104(%r1)
-	ld	%f14, 112(%r1)
-	ld	%f15, 120(%r1)
+	.irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+	ld	\i, \i * 8(%r1)
+	.endr
 	lfpc	GEN_LC_SW_INT_FPC
 	/* restore cr0 */
 	lctlg	%c0, %c0, GEN_LC_SW_INT_CR0
-- 
2.20.1


             reply	other threads:[~2019-11-04  8:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-04  8:55 Janosch Frank [this message]
2019-11-04 10:00 ` [kvm-unit-tests PATCH] s390x: Use loop to save and restore fprs David Hildenbrand
2019-11-08  9:15 ` Thomas Huth
2019-11-11 13:34   ` Pierre Morel

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