[PATCH] powerpc: provide __bswapdi2

[David Woodhouse]

From: David Woodhouse <David.Woodhouse at intel.com>

Some versions of GCC apparently expect this to be provided by libgcc.

Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
Untested.

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 19e096b..f077dc2 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -657,6 +657,17 @@ _GLOBAL(__ucmpdi2)
 	li	r3,2
 	blr
 
+_GLOBAL(__bswapdi2)
+	rlwinm	10,4,8,0xffffffff
+	rlwinm	11,3,8,0xffffffff
+	rlwimi	10,4,24,0,7
+	rlwimi	11,3,24,0,7
+	rlwimi	10,4,24,16,23
+	rlwimi	11,3,24,16,23
+	mr	4,11
+	mr	3,10
+	blr
+
 _GLOBAL(abs)
 	srawi	r4,r3,31
 	xor	r3,r3,r4
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 5cfa800..3b2e6e8 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -234,6 +234,18 @@ _GLOBAL(__flush_dcache_icache)
 	isync
 	blr
 
+_GLOBAL(__bswapdi2)
+	srdi	8,3,32
+	rlwinm	7,3,8,0xffffffff
+	rlwimi	7,3,24,0,7
+	rlwinm	9,8,8,0xffffffff
+	rlwimi	7,3,24,16,23
+	rlwimi	9,8,24,0,7
+	rlwimi	9,8,24,16,23
+	sldi	7,7,32
+	or	7,7,9
+	mr	3,7
+	blr
 
 #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
 /*
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 78b8766..c296665 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -143,7 +143,8 @@ EXPORT_SYMBOL(__lshrdi3);
 int __ucmpdi2(unsigned long long, unsigned long long);
 EXPORT_SYMBOL(__ucmpdi2);
 #endif
-
+long long __bswapdi2(long long);
+EXPORT_SYMBOL(__bswapdi2);
 EXPORT_SYMBOL(memcpy);
 EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memmove);

-- 
dwmw2

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