AE_MAXABS32S — 2-way saturating maximum of absolute value

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_MAXABS32S 1000000000010101 0000
ae_fld_cmpp_v 3210
ae_fld_cmpp_v0 3210
ae_fld_cmpp_v1 3210

Slot
ae_slot2_1
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_MAXABS32S 0110101
ae_fld_cmpp_v 3210
ae_fld_cmpp_v0 3210
ae_fld_cmpp_v1 3210

Assembler Syntax

AE_MAXABS32S aed0..15(ae_cmpp_v), aed0..15(ae_cmpp_v0), aed0..15(ae_cmpp_v1)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_f32x2 AE_MAXABS32S(ae_f32x2 d0, ae_f32x2 d1);

Description

AE_MAXABS32S is an element-wise, 32-bit saturating absolute value of the maximum of two AE_DR registers d0 and d1. The result placed in d is { sat(MAX(abs(d0[63:32]) , abs(d1[63:32])) , sat(MAX(abs(d0[31:0]) , abs(d1[31:0])) }.

In case of saturation, state AE_OVERFLOW is set to 1.

Implementation Pipeline

In Out
AE_OVERFLOW Wstage, ae_cmpp_v0 Mstage, ae_cmpp_v1 Mstage AE_OVERFLOW Wstage, ae_cmpp_v Mstage

Protos that use AE_MAXABS32S

proto AE_MAXABS32S { out ae_f32x2 d, in ae_f32x2 d0, in ae_f32x2 d1 }{}{
AE_MAXABS32S d, d0, d1;
}
proto AE_MAXABSSP24S { out ae_p24x2s d, in ae_p24x2s d0, in ae_p24x2s d1 }{ae_p24x2s t}{
AE_MAXABS32S t, d0, d1;
AE_SAT24S d, t;
}