AE_MULZSAFD24.HH.LL — 24x24-bit signed fraction (1.23) dual MAC with Subtraction/Addition and 64-bit (17.47) result, without saturation, zeroed accumulator.

Instruction Word

Slot
ae2_slot1
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_MULZSAFD24.HH.LL 1101 1011 1000
ae_fld_mul_q0 3210
ae_fld_mul_d0 3210
ae_fld_mul_d1 3210

Slot
ae_slot1
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_MULZSAFD24.HH.LL 11010110
ae_fld_mul_q0 3210
ae_fld_mul_d0 3210
ae_fld_mul_d1 3210

Slot
ae_slot1
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_MULZSAFD24.HH.LL 11010110
ae_fld_mul_q0 3210
ae_fld_mul_d0 3210
ae_fld_mul_d1 3210

Assembler Syntax

AE_MULZSAFD24.HH.LL aed0..15(ae_mul_q0), aed0..15(ae_mul_d0), aed0..15(ae_mul_d1)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_f64 AE_MULZSAFD24_HH_LL(ae_f24x2 d0, ae_f24x2 d1);

Description

AE_MULZSAFD24.HH.LL is a 24x24-bit signed fraction (1.23) dual MAC with 64-bit (17.47) result, without saturation. The extension HH.LL indicates that the two multiplication results are (1) the product of the two AE_DR operands' H elements, and (2) the product of the two AE_DR operands' L elements. and the initial accumultator contents are zeroed before writing into the accumulator. SA indicates that the first multiply result is subtracted from the accumulator, and the second multiply result is added to the accumulator.

Implementation Pipeline

In Out
ae_mul_d0 Mstage, ae_mul_d1 Mstage ae_mul_q0 Wstage

Protos that use AE_MULZSAFD24.HH.LL

proto AE_MULZSAFD24.HH.LL { out ae_f64 d, in ae_f24x2 d0, in ae_f24x2 d1 }{}{
AE_MULZSAFD24.HH.LL d, d0, d1;
}
proto AE_MULZSAFP24S.HH.LL { out ae_q56s d, in ae_p24x2s d0, in ae_p24x2s d1 }{}{
AE_MULZSAFD24.HH.LL d, d0, d1;
}