[SPARC64]: Don't use in/local regs for ldx/stx data in N1 memcpy.

It doesn't matter for use in 64-bit objects, but when used in
32-bit environments the top 32-bits of the local and in
registers will get chopped off on the next register window
spill/restore which leads to difficult to track down and
subtle bugs.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/lib/NGmemcpy.S b/arch/sparc64/lib/NGmemcpy.S
index 605cb3f..96a14ca 100644 (file)
--- a/arch/sparc64/lib/NGmemcpy.S
+++ b/arch/sparc64/lib/NGmemcpy.S
@@ -321,11 +321,11 @@ FUNC_NAME:        /* %i0=dst, %i1=src, %i2=len */
        andn            %i2, 0xf, %i4
        and             %i2, 0xf, %i2
 1:     subcc           %i4, 0x10, %i4
-       EX_LD(LOAD(ldx, %i1, %i5))
+       EX_LD(LOAD(ldx, %i1, %o4))
        add             %i1, 0x08, %i1
        EX_LD(LOAD(ldx, %i1, %g1))
        sub             %i1, 0x08, %i1
-       EX_ST(STORE(stx, %i5, %i1 + %i3))
+       EX_ST(STORE(stx, %o4, %i1 + %i3))
        add             %i1, 0x8, %i1
        EX_ST(STORE(stx, %g1, %i1 + %i3))
        bgu,pt          %XCC, 1b
@@ -334,8 +334,8 @@ FUNC_NAME:  /* %i0=dst, %i1=src, %i2=len */
        be,pt           %XCC, 1f
         nop
        sub             %i2, 0x8, %i2
-       EX_LD(LOAD(ldx, %i1, %i5))
-       EX_ST(STORE(stx, %i5, %i1 + %i3))
+       EX_LD(LOAD(ldx, %i1, %o4))
+       EX_ST(STORE(stx, %o4, %i1 + %i3))
        add             %i1, 0x8, %i1
 1:     andcc           %i2, 0x4, %g0
        be,pt           %XCC, 1f