sparc: Use popc if possible for hweight routines.
Just like powerpc, we code patch at boot time.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/lib/hweight.S b/arch/sparc/lib/hweight.S
new file mode 100644
index 0000000..95414e0
--- /dev/null
+++ b/arch/sparc/lib/hweight.S
@@ -0,0 +1,51 @@
+#include <linux/linkage.h>
+
+ .text
+ .align 32
+ENTRY(__arch_hweight8)
+ ba,pt %xcc, __sw_hweight8
+ nop
+ nop
+ENDPROC(__arch_hweight8)
+ .section .popc_3insn_patch, "ax"
+ .word __arch_hweight8
+ sllx %o0, 64-8, %g1
+ retl
+ popc %g1, %o0
+ .previous
+
+ENTRY(__arch_hweight16)
+ ba,pt %xcc, __sw_hweight16
+ nop
+ nop
+ENDPROC(__arch_hweight16)
+ .section .popc_3insn_patch, "ax"
+ .word __arch_hweight16
+ sllx %o0, 64-16, %g1
+ retl
+ popc %g1, %o0
+ .previous
+
+ENTRY(__arch_hweight32)
+ ba,pt %xcc, __sw_hweight32
+ nop
+ nop
+ENDPROC(__arch_hweight32)
+ .section .popc_3insn_patch, "ax"
+ .word __arch_hweight32
+ sllx %o0, 64-32, %g1
+ retl
+ popc %g1, %o0
+ .previous
+
+ENTRY(__arch_hweight64)
+ ba,pt %xcc, __sw_hweight64
+ nop
+ nop
+ENDPROC(__arch_hweight64)
+ .section .popc_3insn_patch, "ax"
+ .word __arch_hweight64
+ retl
+ popc %o0, %o0
+ nop
+ .previous