AE_MULSSFD24.HL.LH — 24x24-bit signed fraction (1.23) dual MAC with Subtraction/Subtraction and 64-bit (17.47) result, without saturation

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_MULSSFD24.HL.LH 1101 0010 1010
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_MULSSFD24.HL.LH 10111011
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_MULSSFD24.HL.LH 10111011
ae_fld_mul_q0 3210
ae_fld_mul_d0 3210
ae_fld_mul_d1 3210

Assembler Syntax

AE_MULSSFD24.HL.LH aed0..15(ae_mul_q0), aed0..15(ae_mul_d0), aed0..15(ae_mul_d1)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern void AE_MULSSFD24_HL_LH(ae_f64 d /*inout*/, ae_f24x2 d0, ae_f24x2 d1);

Description

AE_MULSSFD24.HL.LH is a 24x24-bit signed fraction (1.23) dual MAC with 64-bit (17.47) result, without saturation. The extension HL.LH indicates that the two multiplication results are (1) the H element of the first AE_DR operand times the L element of the second AE_DR operand; and (2) the L element of the first AE_DR operand times the H element of the second AE_DR operand. SS indicates that both multiply results are subtracted from the accumulator.

Implementation Pipeline

In Out
ae_mul_q0 Wstage, ae_mul_d0 Mstage, ae_mul_d1 Mstage ae_mul_q0 Wstage

Protos that use AE_MULSSFD24.HL.LH

proto AE_MULSSFD24.HL.LH { inout ae_f64 d, in ae_f24x2 d0, in ae_f24x2 d1 }{}{
AE_MULSSFD24.HL.LH d, d0, d1;
}
proto AE_MULSSFP24S.HL.LH { inout ae_q56s d, in ae_p24x2s d0, in ae_p24x2s d1 }{}{
AE_MULSSFD24.HL.LH d, d0, d1;
}