AE_NSAZ16.0 — compute left shift amount to normalize the lowest 16-bits of an AE_DR register

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_NSAZ16.0 1000000000011010 1100 0001
r 3210
ae_fld_dr_to_ar_v0 3210

Slot
ae_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_format - 64 bit(s) 1111
AE_NSAZ16.0 11001000 1110
r 3210
ae_fld_dr_to_ar_v0 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_NSAZ16.0 00100101 11100100
r 3210
ae_fld_dr_to_ar_v0 3210

Slot
ae_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_format1 - 64 bit(s)1 1110
AE_NSAZ16.0 11001000 1110
r 3210
ae_fld_dr_to_ar_v0 3210

Assembler Syntax

AE_NSAZ16.0 a0..15(arr), aed0..15(ae_dr_to_ar_v0)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern int AE_NSAZ16_0(ae_int16x4 d0);

Description

AE_NSAZ16.0 calculates the left shift amount that will normalize the two's complement contents of the lowest 16-bits of an AE_DR register and writes the amount (in the range of 0 to 31) to AR register a. If d0 contains 0, return 0.

Implementation Pipeline

In Out
ae_dr_to_ar_v0 Mstage arr Mstage

Protos that use AE_NSAZ16.0

proto AE_NSAZ16.0 { out int32 a, in ae_int16x4 d0 }{}{
AE_NSAZ16.0 a, d0;
}
proto AE_NSAZ16.0_scalar { out int32 a, in ae_int16 d0 }{}{
AE_NSAZ16.0 a, d0;
}