AE_MULF48Q32SP16S.L_S2 — Legacy HiFi 2 32x16-bit signed fraction (1.31 x 1.15) multiply to 64-bit (9.47) result without saturation: slot 2 version.

Instruction Word

Slot
ae_slot2_0
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_MULF48Q32SP16S.L_S201110111
ae_fld_mul_x2_S2_q0 3210
ae_fld_mul_x2_S2_d0 3210
ae_fld_mul_x2_S2_d1 3210

Assembler Syntax

AE_MULF48Q32SP16S.L_S2 aed0..15(ae_mul_S2_q0), aed0..15(ae_mul_S2_d0), aed0..15(ae_mul_S2_d1)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_q56s AE_MULF48Q32SP16S_L_S2(ae_q56s d0, ae_p24x2s d1);

Description

AE_MULF48Q32SP16S.L_S2 is a 32x16-bit signed fraction (1.31 x 1.15) multiply without saturation. Fixed point values represent the range [-1.0 ... 1.0). The 32-bit input is from d0[47:16] and the 16-bit input is from d1[23:8]. The result is written to an AE_DR register, without saturation. This instruction is provided mainly for compatibility with HiFi 2.

This is equivalent to AE_MULF48Q32SP16S.L and will be automatically used by the compiler as needed.

Implementation Pipeline

In Out
ae_mul_S2_d0 Mstage, ae_mul_S2_d1 Mstage ae_mul_S2_q0 Wstage

Protos that use AE_MULF48Q32SP16S.L_S2

proto AE_MULF48Q32SP16S.L_S2 { out ae_q56s d, in ae_q56s d0, in ae_p24x2s d1 }{}{
AE_MULF48Q32SP16S.L_S2 d, d0, d1;
}
proto AE_MULFQ32SP16S.L_S2 { out ae_q56s d, in ae_q56s d0, in ae_p24x2s d1 }{}{
AE_MULF48Q32SP16S.L_S2 d, d0, d1;
}