parisc/unaligned: Rewrite inline assembly of emulate_ldw()

Convert to use real temp variables instead of clobbering processor
registers.

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

diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index b923bc1..e8bc0cd 100644 (file)
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -141,27 +141,26 @@ static int emulate_ldh(struct pt_regs *regs, int toreg)
 static int emulate_ldw(struct pt_regs *regs, int toreg, int flop)
 {
        unsigned long saddr = regs->ior;
-       unsigned long val = 0;
+       unsigned long val = 0, temp1, temp2;
        ASM_EXCEPTIONTABLE_VAR(ret);
 
        DPRINTF("load " RFMT ":" RFMT " to r%d for 4 bytes\n", 
                regs->isr, regs->ior, toreg);
 
        __asm__ __volatile__  (
-"      zdep    %3,28,2,%%r19\n"                /* r19=(ofs&3)*8 */
-"      mtsp    %4, %%sr1\n"
-"      depw    %%r0,31,2,%3\n"
-"1:    ldw     0(%%sr1,%3),%0\n"
-"2:    ldw     4(%%sr1,%3),%%r20\n"
-"      subi    32,%%r19,%%r19\n"
-"      mtctl   %%r19,11\n"
-"      vshd    %0,%%r20,%0\n"
+"      zdep    %4,28,2,%2\n"           /* r19=(ofs&3)*8 */
+"      mtsp    %5, %%sr1\n"
+"      depw    %%r0,31,2,%4\n"
+"1:    ldw     0(%%sr1,%4),%0\n"
+"2:    ldw     4(%%sr1,%4),%3\n"
+"      subi    32,%4,%2\n"
+"      mtctl   %2,11\n"
+"      vshd    %0,%3,%0\n"
 "3:    \n"
        ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
        ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
-       : "=r" (val), "+r" (ret)
-       : "0" (val), "r" (saddr), "r" (regs->isr)
-       : "r19", "r20" );
+       : "+r" (val), "+r" (ret), "=&r" (temp1), "=&r" (temp2)
+       : "r" (saddr), "r" (regs->isr) );
 
        DPRINTF("val = 0x" RFMT "\n", val);