Merge tag 'drm-next-2018-06-15' of git://anongit.freedesktop.org/drm/drm

[linux.git] / arch / powerpc / lib / checksum_64.S

diff --git a/arch/powerpc/lib/checksum_64.S b/arch/powerpc/lib/checksum_64.S
index d7f1a966136ea7e128c7ba85dc6b203d7bac27eb..886ed94b9c13307f5fc739e899274704faa89a15 100644 (file)
--- a/arch/powerpc/lib/checksum_64.S
+++ b/arch/powerpc/lib/checksum_64.S
@@ -429,3 +429,31 @@ dstnr;     stb     r6,0(r4)
        stw     r6,0(r8)
        blr
 EXPORT_SYMBOL(csum_partial_copy_generic)
+
+/*
+ * __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+ *                        const struct in6_addr *daddr,
+ *                        __u32 len, __u8 proto, __wsum sum)
+ */
+
+_GLOBAL(csum_ipv6_magic)
+       ld      r8, 0(r3)
+       ld      r9, 8(r3)
+       add     r5, r5, r6
+       addc    r0, r8, r9
+       ld      r10, 0(r4)
+       ld      r11, 8(r4)
+       adde    r0, r0, r10
+       add     r5, r5, r7
+       adde    r0, r0, r11
+       adde    r0, r0, r5
+       addze   r0, r0
+       rotldi  r3, r0, 32              /* fold two 32 bit halves together */
+       add     r3, r0, r3
+       srdi    r0, r3, 32
+       rotlwi  r3, r0, 16              /* fold two 16 bit halves together */
+       add     r3, r0, r3
+       not     r3, r3
+       rlwinm  r3, r3, 16, 16, 31
+       blr
+EXPORT_SYMBOL(csum_ipv6_magic)