AE_SUB16 — 4-way 16-bit subtraction

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_SUB16 1000000000010100 0001
ae_fld_arth_v 3210
ae_fld_arth_v0 3210
ae_fld_arth_v1 3210

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_SUB16 1101 0100 0101
ae_fld_arth_v 3210
ae_fld_arth_v0 3210
ae_fld_arth_v1 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_SUB16 11101111
ae_fld_arth_v 3210
ae_fld_arth_v0 3210
ae_fld_arth_v1 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_SUB16 11101111
ae_fld_arth_v 3210
ae_fld_arth_v0 3210
ae_fld_arth_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_SUB16 0100110
ae_fld_arth_v 3210
ae_fld_arth_v0 3210
ae_fld_arth_v1 3210

Assembler Syntax

AE_SUB16 aed0..15(ae_arth_v), aed0..15(ae_arth_v0), aed0..15(ae_arth_v1)

C Syntax

#include <xtensa/tie/xt_hifi2.h>

extern ae_int16x4 AE_SUB16(ae_int16x4 d0, ae_int16x4 d1);

Description

AE_SUB16 is an element-wise 16-bit subtraction of two AE_DR registers d0 and d1. The result placed in d is {d0[63:48] - d1[63:48] , d0[47:32] - d1[47:32] , d0[31:16] - d1[31:16] , d0[15:0] - d1[15:0] }.

Implementation Pipeline

In Out
ae_arth_v0 Mstage, ae_arth_v1 Mstage ae_arth_v Mstage

Protos that use AE_SUB16

proto AE_INT16X4_NEG { out ae_int16x4 d, in ae_int16x4 d0 }{ae_int16x4 zero}{
AE_MOVI zero, 0;
AE_SUB16 d, zero, d0;
}
proto AE_INT16X4_SUB_INT16 { out ae_int16x4 d, in ae_int16x4 d0, in ae_int16 d1 }{}{
AE_SUB16 d, d0, d1;
}
proto AE_INT16X4_SUB_INT16X4 { out ae_int16x4 d, in ae_int16x4 d0, in ae_int16x4 d1 }{}{
AE_SUB16 d, d0, d1;
}
proto AE_INT16_NEG { out ae_int16 d, in ae_int16 d0 }{ae_int16 zero}{
AE_MOVI zero, 0;
AE_SUB16 d, zero, d0;
}
proto AE_INT16_SUB_INT16 { out ae_int16 d, in ae_int16 d0, in ae_int16 d1 }{}{
AE_SUB16 d, d0, d1;
}
proto AE_INT16_SUB_INT16X4 { out ae_int16x4 d, in ae_int16 d0, in ae_int16x4 d1 }{}{
AE_SUB16 d, d0, d1;
}
proto AE_SUB16 { out ae_int16x4 d, in ae_int16x4 d0, in ae_int16x4 d1 }{}{
AE_SUB16 d, d0, d1;
}