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51746fc082
There is no reason to have __ashlti3(), __ashrti3(), and __lshrti3() implemented in assembler. Convert them all to C, which allows the compiler to optimize the code if newer instructions allow that. Reviewed-by: Juergen Christ <jchrist@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/export.h>
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#include <linux/types.h>
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#include "tishift.h"
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union ti {
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__int128_t val;
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struct {
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u64 high;
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u64 low;
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};
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};
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noinstr __int128_t __ashlti3(__int128_t a, int shift)
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{
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union ti ti = { .val = a };
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if (!shift)
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return ti.val;
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if (shift < 64) {
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ti.high = (ti.high << shift) | (ti.low >> (64 - shift));
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ti.low = ti.low << shift;
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} else {
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ti.high = ti.low << (shift - 64);
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ti.low = 0;
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}
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return ti.val;
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}
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EXPORT_SYMBOL(__ashlti3);
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noinstr __int128_t __ashrti3(__int128_t a, int shift)
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{
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union ti ti = { .val = a };
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if (!shift)
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return ti.val;
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if (shift < 64) {
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ti.low = (ti.low >> shift) | (ti.high << (64 - shift));
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ti.high = (int64_t)ti.high >> shift;
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} else {
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ti.low = (int64_t)ti.high >> (shift - 64);
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ti.high = (int64_t)ti.high >> 63;
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}
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return ti.val;
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}
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EXPORT_SYMBOL(__ashrti3);
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noinstr __int128_t __lshrti3(__int128_t a, int shift)
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{
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union ti ti = { .val = a };
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if (!shift)
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return ti.val;
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if (shift < 64) {
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ti.low = (ti.low >> shift) | (ti.high << (64 - shift));
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ti.high = ti.high >> shift;
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} else {
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ti.low = ti.high >> (shift - 64);
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ti.high = 0;
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}
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return ti.val;
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}
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EXPORT_SYMBOL(__lshrti3);
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