waitcntΒΆ

Counts of outstanding instructions to wait for.

The bits of this operand have the following meaning:

Bits

Description

Value Range

2:0

EXP_CNT: export and LDSDIR count.

0..7

3:3

Unused

-

9:4

LGKM_CNT: LDS, GDS, Constant and Message count.

0..63

15:10

VM_CNT: vector memory operations count.

0..63

This operand may be specified as one of the following:

  • An integer_number or an absolute_expression. The value must be in the range 0..0xFFFF.

  • A combination of vmcnt, expcnt, lgkmcnt and other values described below.

    Syntax

    Description

    vmcnt(<N>)

    A VM_CNT value. N must not exceed the largest VM_CNT value.

    expcnt(<N>)

    An EXP_CNT value. N must not exceed the largest EXP_CNT value.

    lgkmcnt(<N>)

    An LGKM_CNT value. N must not exceed the largest LGKM_CNT value.

    vmcnt_sat(<N>)

    A VM_CNT value computed as min(N, the largest VM_CNT value).

    expcnt_sat(<N>)

    An EXP_CNT value computed as min(N, the largest EXP_CNT value).

    lgkmcnt_sat(<N>)

    An LGKM_CNT value computed as min(N, the largest LGKM_CNT value).

These values may be specified in any order. Spaces, ampersands and commas may be used as optional separators.

N is either an integer number or an absolute expression.

Examples:

s_waitcnt vmcnt(1)
s_waitcnt expcnt(2) lgkmcnt(3)
s_waitcnt vmcnt(1), expcnt(2), lgkmcnt(3)
s_waitcnt vmcnt(1) & lgkmcnt_sat(100) & expcnt(2)