AE_SRAI16R — 4-way shift right (arithmetic sign-extending) by immediate with rounding

Instruction Word

Slot
ae2_slot0
6
3
6
2
6
1
6
0
5
9
5
8
5
7
5
6
5
5
5
4
5
3
5
2
5
1
5
0
4
9
4
8
4
7
4
6
4
5
4
4
4
3
4
2
4
1
4
0
3
9
3
8
3
7
3
6
3
5
3
4
3
3
3
2
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9876543210
Format ae_format2 - 64 bit(s)0000 1110
AE_SRAI16R 1000000000011001 0011
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_osa16 3210

Slot
ae_slot2_0
6
3
6
2
6
1
6
0
5
9
5
8
5
7
5
6
5
5
5
4
5
3
5
2
5
1
5
0
4
9
4
8
4
7
4
6
4
5
4
4
4
3
4
2
4
1
4
0
3
9
3
8
3
7
3
6
3
5
3
4
3
3
3
2
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9876543210
Format ae_format - 64 bit(s) 1111
AE_SRAI16R11101000
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_osa16 3210

Assembler Syntax

AE_SRAI16R aed0..15(ae_shift_d), aed0..15(ae_shift_d0), 0..15

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_int16x4 AE_SRAI16R(ae_int16x4 d0, immediate sa);

Description

AE_SRAI16R is a four-way arithmetic (sign-extending) right shift of AE_DR register d0 by immediate, with result placed in d. The result is rounded to match the semantics of the ITU intrinsic shr_r.

d.0 = round(d0.0 >>s i)

d.1 = round(d0.1 >>s i)

d.2 = round(d0.2 >>s i)

d.3 = round(d0.3 >>s i)

Implementation Pipeline

In Out
ae_shift_d0 Mstage ae_shift_d Mstage

Protos that use AE_SRAI16R

proto AE_SRAI16R { out ae_int16x4 d, in ae_int16x4 d0, in immediate sa }{}{
AE_SRAI16R d, d0, sa + 0;
}