QUOU — Quotient Unsigned

Instruction Word

Slot
Inst
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 x24 - 24 bit(s) 0
QUOU 11000010 0000
r 3210
s 3210
t 3210

Assembler Syntax

QUOU ar, as, at

C Syntax

#include <xtensa/tie/xt_integerdivide.h>

extern unsigned XT_QUOU(unsigned ars, unsigned art);

Description

(please consult the Xtensa ® Instruction Set Architecture Reference Manual for any cross references and additional information)

QUOU performs a 32-bit unsigned division of the contents of address register as by the contents of address register at and writes the quotient to address register ar. If the contents of address register at are zero, QUOU raises an Integer Divide by Zero exception instead of writing a result.

Operation

if AR[t] = 032 then
	Exception (IntegerDivideByZero)
else
	tq ← (0||AR[s]) quo (0||AR[t])
	AR[r] ← tq31..0
endif

Exceptions

EveryInstR Group (see EveryInstR Group:)GenExcep(IntegerDivideByZeroCause) if 32-bit Integer Divide Option

Implementation Pipeline

In Out
ars Estage, art Estage arr Estage

Protos that use QUOU

proto QUOU { out uint32 arr, in uint32 ars, in uint32 art }{}{
QUOU arr, ars, art;
}