From: Helge Deller <deller@gmx.de>
Date: Sat, 19 Aug 2023 21:40:36 +0000 (+0200)
Subject: parisc: unaligned: Simplify 32-bit assembly in emulate_std()
X-Git-Tag: v6.6.17~4096^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=98a9d5f07edfe60a6e6f9ffac1779dca39f415d5;p=platform%2Fkernel%2Flinux-rpi.git

parisc: unaligned: Simplify 32-bit assembly in emulate_std()

No need to extract upper and lower 32bit values of the 64-bit value. Use
gcc's %R1 to access lower 32-bits and %1 to access upper 32-bits
instead.

Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index 170d0dd..ce25acf 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -338,25 +338,24 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
 	: "r19", "r20", "r21", "r22", "r1" );
 #else
     {
-	unsigned long valh = (val >> 32), vall = (val & 0xffffffffl);
 	__asm__ __volatile__ (
-"	mtsp	%4, %%sr1\n"
-"	zdep	%2, 29, 2, %%r19\n"
-"	dep	%%r0, 31, 2, %3\n"
+"	mtsp	%3, %%sr1\n"
+"	zdep	%R1, 29, 2, %%r19\n"
+"	dep	%%r0, 31, 2, %2\n"
 "	mtsar	%%r19\n"
 "	zvdepi	-2, 32, %%r19\n"
-"1:	ldw	0(%%sr1,%3),%%r20\n"
-"2:	ldw	8(%%sr1,%3),%%r21\n"
-"	vshd	%1, %2, %%r1\n"
+"1:	ldw	0(%%sr1,%2),%%r20\n"
+"2:	ldw	8(%%sr1,%2),%%r21\n"
+"	vshd	%1, %R1, %%r1\n"
 "	vshd	%%r0, %1, %1\n"
-"	vshd	%2, %%r0, %2\n"
+"	vshd	%R1, %%r0, %R1\n"
 "	and	%%r20, %%r19, %%r20\n"
 "	andcm	%%r21, %%r19, %%r21\n"
 "	or	%1, %%r20, %1\n"
-"	or	%2, %%r21, %2\n"
-"3:	stw	%1,0(%%sr1,%3)\n"
-"4:	stw	%%r1,4(%%sr1,%3)\n"
-"5:	stw	%2,8(%%sr1,%3)\n"
+"	or	%R1, %%r21, %R1\n"
+"3:	stw	%1,0(%%sr1,%2)\n"
+"4:	stw	%%r1,4(%%sr1,%2)\n"
+"5:	stw	%R1,8(%%sr1,%2)\n"
 "6:	\n"
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 6b)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 6b)
@@ -364,7 +363,7 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(4b, 6b)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(5b, 6b)
 	: "+r" (ret)
-	: "r" (valh), "r" (vall), "r" (regs->ior), "r" (regs->isr)
+	: "r" (val), "r" (regs->ior), "r" (regs->isr)
 	: "r19", "r20", "r21", "r1" );
     }
 #endif