mirror of
https://github.com/openhwgroup/cvw
synced 2025-02-11 06:05:49 +00:00
146 lines
3.3 KiB
ArmAsm
146 lines
3.3 KiB
ArmAsm
///////////////////////////////////////////
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// btbtrash.S
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//
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// Written: Rose Thompson rose@rosethompson.net 23 October 2024
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//
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// Purpose: Test the branch target buffer alias with divide and cache pipeline stalls
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//
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// A component of the CORE-V-WALLY configurable RISC-V project.
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// https://github.com/openhwgroup/cvw
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//
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// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University
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//
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// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
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//
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// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
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// except in compliance with the License, or, at your option, the Apache License version 2.0. You
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// may obtain a copy of the License at
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//
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// https://solderpad.org/licenses/SHL-2.1/
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//
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// Unless required by applicable law or agreed to in writing, any work distributed under the
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// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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////////////////////////////////////////////////////////////////////////////////////////////////
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// load code to initalize stack, handle interrupts, terminate
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#include "WALLY-init-lib.h"
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main:
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# Division test (having trouble with buildroot)
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li x1, 1938759018
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li x2, 3745029
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li x3, 458
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li x4, 29587209347
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li x5, 28957
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li x6, 298
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li x7, 238562
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li x8, 198674
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li x9, 134
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li x10, 906732
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li x11, 29
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li x12, 50912
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li x13, 59
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li x14, 6902385
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li x15, 1923857
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li x16, 3985
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li x17, 3947
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li x18, 15984
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li x19, 5
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li x20, 9684658489
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li x21, 6548
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li x22, 3564
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li x23, 94
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li x24, 689464
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li x25, 42567
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li x26, 98453
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li x27, 648
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li x28, 984
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li x29, 6984
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li x30, 864
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# x31 will be our loop counter
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li x31, 4
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.align 12
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jump1:
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divuw x0, x1, x2
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j jump3
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jump4:
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divuw x0, x5, x6
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j jump5
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jump6:
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divuw x0, x10, x9
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j jump7
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jump8:
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divuw x0, x14, x3
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j jump9
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jump10:
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divuw x0, x18, x17
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j jump11
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jump12:
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divuw x0, x21, x22
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j jump13
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jump14:
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divuw x0, x24, x25
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j jump15
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jump16:
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divuw x0, x29, x28
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j jump17
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jump18:
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divuw x0, x1, x30
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j jump19
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jump20:
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divuw x0, x3, x19
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j jump21
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jump22:
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divuw x0, x12, x13
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j jump23
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.align 12 # size of the 1024 btb apart
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jump2:
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j jump1
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jump3:
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divuw x0, x4, x3
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j jump4
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jump5:
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divuw x0, x7, x8
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j jump6
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jump7:
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divuw x0, x12, x11
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j jump8
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jump9:
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divuw x0, x15, x16
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j jump10
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jump11:
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divuw x0, x20, x19
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j jump12
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jump13:
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divuw x0, x24, x23
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j jump14
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jump15:
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divuw x0, x26, x27
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j jump16
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jump17:
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divuw x0, x29, x30
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j jump18
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jump19:
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divuw x0, x2, x3
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j jump20
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jump21:
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divuw x0, x4, x5
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j jump22
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jump23:
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divuw x0, x20, x21
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#j jump22
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fence.i
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addi x31, x31, -1
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bne x31, x0, jump1
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finsihed:
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j done
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