Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / powerpc / lib / hweight_64.S

diff --git a/arch/powerpc/lib/hweight_64.S b/arch/powerpc/lib/hweight_64.S
new file mode 100644 (file)
index 0000000..fda2786
--- /dev/null
+++ b/arch/powerpc/lib/hweight_64.S
@@ -0,0 +1,110 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2010
+ *
+ * Author: Anton Blanchard <anton@au.ibm.com>
+ */
+#include <asm/processor.h>
+#include <asm/ppc_asm.h>
+
+/* Note: This code relies on -mminimal-toc */
+
+_GLOBAL(__arch_hweight8)
+BEGIN_FTR_SECTION
+       b .__sw_hweight8
+       nop
+       nop
+FTR_SECTION_ELSE
+       PPC_POPCNTB(r3,r3)
+       clrldi  r3,r3,64-8
+       blr
+ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
+
+_GLOBAL(__arch_hweight16)
+BEGIN_FTR_SECTION
+       b .__sw_hweight16
+       nop
+       nop
+       nop
+       nop
+FTR_SECTION_ELSE
+  BEGIN_FTR_SECTION_NESTED(50)
+       PPC_POPCNTB(r3,r3)
+       srdi    r4,r3,8
+       add     r3,r4,r3
+       clrldi  r3,r3,64-8
+       blr
+  FTR_SECTION_ELSE_NESTED(50)
+       clrlwi  r3,r3,16
+       PPC_POPCNTW(r3,r3)
+       clrldi  r3,r3,64-8
+       blr
+  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 50)
+ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
+
+_GLOBAL(__arch_hweight32)
+BEGIN_FTR_SECTION
+       b .__sw_hweight32
+       nop
+       nop
+       nop
+       nop
+       nop
+       nop
+FTR_SECTION_ELSE
+  BEGIN_FTR_SECTION_NESTED(51)
+       PPC_POPCNTB(r3,r3)
+       srdi    r4,r3,16
+       add     r3,r4,r3
+       srdi    r4,r3,8
+       add     r3,r4,r3
+       clrldi  r3,r3,64-8
+       blr
+  FTR_SECTION_ELSE_NESTED(51)
+       PPC_POPCNTW(r3,r3)
+       clrldi  r3,r3,64-8
+       blr
+  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 51)
+ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
+
+_GLOBAL(__arch_hweight64)
+BEGIN_FTR_SECTION
+       b .__sw_hweight64
+       nop
+       nop
+       nop
+       nop
+       nop
+       nop
+       nop
+       nop
+FTR_SECTION_ELSE
+  BEGIN_FTR_SECTION_NESTED(52)
+       PPC_POPCNTB(r3,r3)
+       srdi    r4,r3,32
+       add     r3,r4,r3
+       srdi    r4,r3,16
+       add     r3,r4,r3
+       srdi    r4,r3,8
+       add     r3,r4,r3
+       clrldi  r3,r3,64-8
+       blr
+  FTR_SECTION_ELSE_NESTED(52)
+       PPC_POPCNTD(r3,r3)
+       clrldi  r3,r3,64-8
+       blr
+  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 52)
+ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)