5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
26 lines
530 B
C
26 lines
530 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "libgcc.h"
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DWtype __ashrdi3(DWtype u, word_type b)
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{
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const DWunion uu = {.ll = u};
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const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
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DWunion w;
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if (b == 0)
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return u;
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if (bm <= 0) {
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/* w.s.high = 1..1 or 0..0 */
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w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
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w.s.low = uu.s.high >> -bm;
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} else {
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const UWtype carries = (UWtype) uu.s.high << bm;
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w.s.high = uu.s.high >> b;
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w.s.low = ((UWtype) uu.s.low >> b) | carries;
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}
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return w.ll;
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}
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