AE_TRUNCA16P24S.H — Truncate a 9.23-bit fraction to 1.15-bits

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_TRUNCA16P24S.H 1000000000011010 1100 0101
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_TRUNCA16P24S.H 11001000 1111
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_TRUNCA16P24S.H 00100101 00010100
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_TRUNCA16P24S.H 11001000 1111
r 3210
ae_fld_dr_to_ar_v0 3210

Assembler Syntax

AE_TRUNCA16P24S.H a0..15(arr), aed0..15(ae_dr_to_ar_v0)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern int AE_TRUNCA16P24S_H(ae_int24x2 d0);

Description

AE_TRUNCA16P24S.H Truncate a 9.23-bit AE_DR fraction in d0.H to 1.15 bits, sign-extend it to 17.15 bits and store it into AR register a. The 8 MSBs and the 8 LSBs of the input value are discarded.

Implementation Pipeline

In Out
ae_dr_to_ar_v0 Mstage arr Mstage

Protos that use AE_TRUNCA16P24S.H

proto AE_TRUNCA16P24S.H { out int32 a, in ae_int24x2 d0 }{}{
AE_TRUNCA16P24S.H a, d0;
}