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-rw-r--r--arch/s390/lib/tishift.S63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/s390/lib/tishift.S b/arch/s390/lib/tishift.S
new file mode 100644
index 0000000000..96214f51f4
--- /dev/null
+++ b/arch/s390/lib/tishift.S
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include <asm/nospec-insn.h>
+
+ .section .noinstr.text, "ax"
+
+ GEN_BR_THUNK %r14
+
+SYM_FUNC_START(__ashlti3)
+ lmg %r0,%r1,0(%r3)
+ cije %r4,0,1f
+ lhi %r3,64
+ sr %r3,%r4
+ jnh 0f
+ srlg %r3,%r1,0(%r3)
+ sllg %r0,%r0,0(%r4)
+ sllg %r1,%r1,0(%r4)
+ ogr %r0,%r3
+ j 1f
+0: sllg %r0,%r1,-64(%r4)
+ lghi %r1,0
+1: stmg %r0,%r1,0(%r2)
+ BR_EX %r14
+SYM_FUNC_END(__ashlti3)
+EXPORT_SYMBOL(__ashlti3)
+
+SYM_FUNC_START(__ashrti3)
+ lmg %r0,%r1,0(%r3)
+ cije %r4,0,1f
+ lhi %r3,64
+ sr %r3,%r4
+ jnh 0f
+ sllg %r3,%r0,0(%r3)
+ srlg %r1,%r1,0(%r4)
+ srag %r0,%r0,0(%r4)
+ ogr %r1,%r3
+ j 1f
+0: srag %r1,%r0,-64(%r4)
+ srag %r0,%r0,63
+1: stmg %r0,%r1,0(%r2)
+ BR_EX %r14
+SYM_FUNC_END(__ashrti3)
+EXPORT_SYMBOL(__ashrti3)
+
+SYM_FUNC_START(__lshrti3)
+ lmg %r0,%r1,0(%r3)
+ cije %r4,0,1f
+ lhi %r3,64
+ sr %r3,%r4
+ jnh 0f
+ sllg %r3,%r0,0(%r3)
+ srlg %r1,%r1,0(%r4)
+ srlg %r0,%r0,0(%r4)
+ ogr %r1,%r3
+ j 1f
+0: srlg %r1,%r0,-64(%r4)
+ lghi %r0,0
+1: stmg %r0,%r1,0(%r2)
+ BR_EX %r14
+SYM_FUNC_END(__lshrti3)
+EXPORT_SYMBOL(__lshrti3)