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-rw-r--r--arch/sparc/lib/multi3.S36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/sparc/lib/multi3.S b/arch/sparc/lib/multi3.S
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+++ b/arch/sparc/lib/multi3.S
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+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/export.h>
+#include <linux/linkage.h>
+
+ .text
+ .align 4
+ENTRY(__multi3) /* %o0 = u, %o1 = v */
+ mov %o1, %g1
+ srl %o3, 0, %o4
+ mulx %o4, %g1, %o1
+ srlx %g1, 0x20, %g3
+ mulx %g3, %o4, %g7
+ sllx %g7, 0x20, %o5
+ srl %g1, 0, %o4
+ sub %o1, %o5, %o5
+ srlx %o5, 0x20, %o5
+ addcc %g7, %o5, %g7
+ srlx %o3, 0x20, %o5
+ mulx %o4, %o5, %o4
+ mulx %g3, %o5, %o5
+ sethi %hi(0x80000000), %g3
+ addcc %g7, %o4, %g7
+ srlx %g7, 0x20, %g7
+ add %g3, %g3, %g3
+ movcc %xcc, %g0, %g3
+ addcc %o5, %g7, %o5
+ sllx %o4, 0x20, %o4
+ add %o1, %o4, %o1
+ add %o5, %g3, %g2
+ mulx %g1, %o2, %g1
+ add %g1, %g2, %g1
+ mulx %o0, %o3, %o0
+ retl
+ add %g1, %o0, %o0
+ENDPROC(__multi3)
+EXPORT_SYMBOL(__multi3)