AE_TRUNCI32X2F64S — Shift left by immediate 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_TRUNCI32X2F64S 1000000000001000
ae_fld_shift_d 3210
ae_fld_shift_d0 3210
ae_fld_shift_sd 3210
ae_fld_osa16 3210

Assembler Syntax

AE_TRUNCI32X2F64S aed0..15(ae_shift_d), aed0..15(ae_shift_d0), aed0..15(ae_shift_sd), 0..15

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_int32x2 AE_TRUNCI32X2F64S(ae_int64 d0, ae_int64 d1, immediate sa);

Description

AE_TRUNCI32X2F64S shift-left two signed 64-bit values from AE_DR registers dh and dl by immediate shift amount i, saturate each shifted value to 64 bits and store the 32 MSBs of each result in the two 32-bit elements of AE_DR register d. 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 AE_OVERFLOW Wstage, ae_shift_d Mstage

Protos that use AE_TRUNCI32X2F64S

proto AE_TRUNCI32F64S { out ae_int32x2 d, in ae_int64 d0, in immediate sa }{}{
AE_TRUNCI32X2F64S d, d0, d0, sa + 0;
}
proto AE_TRUNCI32X2F64S { out ae_int32x2 d, in ae_int64 d0, in ae_int64 d1, in immediate sa }{}{
AE_TRUNCI32X2F64S d, d0, d1, sa + 0;
}