AE_TRUNCA32X2F64S — Bidirectional arithmetic shift left by AR register and truncate

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_TRUNCA32X2F64S 1000000000000011
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_shift_sd 3210
s 3210

Slot
Inst
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 x24 - 24 bit(s) 0
AE_TRUNCA32X2F64S 1111 0100
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_shift_sd 3210
s 3210

Slot
ae_minislot2
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_mini0 - 64 bit(s)01000000000000000000000 1110
AE_TRUNCA32X2F64S 0 11
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_shift_sd 3210
s 3210

Assembler Syntax

AE_TRUNCA32X2F64S aed0..15(ae_shift_d), aed0..15(ae_shift_d0), aed0..15(ae_shift_sd), a0..15(ars)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_int32x2 AE_TRUNCA32X2F64S(ae_int64 d0, ae_int64 d1, int sa);

Description

AE_TRUNCA32X2F64S Shift left or right arithmetic (sign-extending), two signed 64-bit values from AE_DR registers dh and dl by AR register shift amount a; each shifted value is saturated 64 bits and the 32 MSBs of the two results are stored in the two 32-bit elements of AE_DR register d. For a positive shift amount, the value is shifted to the left. For a negative shift amount, the value is sign-extended and shifted to the right. In case of saturation, state AE_OVERFLOW is set to 1.

Implementation Pipeline

In Out
AE_OVERFLOW Wstage, ae_shift_d0 Mstage, ae_shift_sd Mstage, ars Estage AE_OVERFLOW Wstage, ae_shift_d Mstage

Protos that use AE_TRUNCA32X2F64S

proto AE_TRUNCA32F64S { out ae_int32x2 d, in ae_int64 d0, in int32 sa }{}{
AE_TRUNCA32X2F64S d, d0, d0, sa;
}
proto AE_TRUNCA32X2F64S { out ae_int32x2 d, in ae_int64 d0, in ae_int64 d1, in int32 sa }{}{
AE_TRUNCA32X2F64S d, d0, d1, sa;
}