sparc: Use popc if possible for hweight routines.

[sfrench/cifs-2.6.git] / arch / sparc / lib / hweight.S

diff --git a/arch/sparc/lib/hweight.S b/arch/sparc/lib/hweight.S
new file mode 100644 (file)
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