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comparison llvm/docs/AMDGPU/gfx10_waitcnt.rst @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 2e18cbf3894f
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147:c2174574ed3a 150:1d019706d866
1 ..
2 **************************************************
3 * *
4 * Automatically generated file, do not edit! *
5 * *
6 **************************************************
7
8 .. _amdgpu_synid10_waitcnt:
9
10 waitcnt
11 ===========================
12
13 Counts of outstanding instructions to wait for.
14
15 The bits of this operand have the following meaning:
16
17 ========== ========= ================================================ ============
18 High Bits Low Bits Description Value Range
19 ========== ========= ================================================ ============
20 15:14 3:0 VM_CNT: vector memory operations count. 0..63
21 \- 6:4 EXP_CNT: export count. 0..7
22 \- 11:8 LGKM_CNT: LDS, GDS, Constant and Message count. 0..15
23 ========== ========= ================================================ ============
24
25 This operand may be specified as one of the following:
26
27 * An :ref:`integer_number<amdgpu_synid_integer_number>` or an :ref:`absolute_expression<amdgpu_synid_absolute_expression>`. The value must be in the range 0..0xFFFF.
28 * A combination of *vmcnt*, *expcnt*, *lgkmcnt* and other values described below.
29
30 ====================== ======================================================================
31 Syntax Description
32 ====================== ======================================================================
33 vmcnt(<*N*>) A VM_CNT value. *N* must not exceed the largest VM_CNT value.
34 expcnt(<*N*>) An EXP_CNT value. *N* must not exceed the largest EXP_CNT value.
35 lgkmcnt(<*N*>) An LGKM_CNT value. *N* must not exceed the largest LGKM_CNT value.
36 vmcnt_sat(<*N*>) A VM_CNT value computed as min(*N*, the largest VM_CNT value).
37 expcnt_sat(<*N*>) An EXP_CNT value computed as min(*N*, the largest EXP_CNT value).
38 lgkmcnt_sat(<*N*>) An LGKM_CNT value computed as min(*N*, the largest LGKM_CNT value).
39 ====================== ======================================================================
40
41 These values may be specified in any order. Spaces, ampersands and commas may be used as optional separators.
42
43 *N* is either an
44 :ref:`integer number<amdgpu_synid_integer_number>` or an
45 :ref:`absolute expression<amdgpu_synid_absolute_expression>`.
46
47 Examples:
48
49 .. parsed-literal::
50
51 vm_cnt = 1
52 exp_cnt = 2
53 lgkm_cnt = 3
54 cnt = vm_cnt | (exp_cnt << 4) | (lgkm_cnt << 8)
55
56 s_waitcnt cnt
57 s_waitcnt 1 | (2 << 4) | (3 << 8) // the same as above
58 s_waitcnt vmcnt(1) expcnt(2) lgkmcnt(3) // the same as above
59 s_waitcnt vmcnt(vm_cnt) expcnt(exp_cnt) lgkmcnt(lgkm_cnt) // the same as above
60
61 s_waitcnt vmcnt(1)
62 s_waitcnt expcnt(2) lgkmcnt(3)
63 s_waitcnt vmcnt(1), expcnt(2), lgkmcnt(3)
64 s_waitcnt vmcnt(1) & lgkmcnt_sat(100) & expcnt(2)
65