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[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [tests/] [or1200/] [sim/] [or1200-ffl1.S] - Rev 733
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/*
OR1200 Find First/Last '1' Test
Checks l.ff1 and l.fl1 outputs for every bit position
Julius Baxter, julius.baxter@orsoc.se
*/
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2010 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
#include "spr-defs.h"
#include "board.h"
#include "or1200-defines.h"
/* =================================================== [ exceptions ] === */
.section .vectors, "ax"
/* ---[ 0x100: RESET exception ]----------------------------------------- */
.org 0x100
l.movhi r0, 0
/* Clear status register */
l.ori r1, r0, SPR_SR_SM
l.mtspr r0, r1, SPR_SR
/* Clear timer */
l.mtspr r0, r0, SPR_TTMR
/* Jump to program initialisation code */
.global _start
l.movhi r4, hi(_start)
l.ori r4, r4, lo(_start)
l.jr r4
l.nop
/* ---[ 0x700: Illegal instruction exception ]-------------------------- */
.org 0x700
#ifndef OR1200_IMPL_ALU_FFL1
// No problem - instruction not supported
l.movhi r3, hi(0x8000000d)
l.ori r3, r3, lo(0x8000000d)
l.nop 0x2
l.ori r3, r0, 0
#else
l.ori r3, r0, 1
#endif
l.nop 0x1
/* =================================================== [ text ] === */
.section .text
/* =================================================== [ start ] === */
.global _start
_start:
/* Instruction cache enable */
/* Check if IC present and skip enabling otherwise */
l.mfspr r24,r0,SPR_UPR
l.andi r26,r24,SPR_UPR_ICP
l.sfeq r26,r0
l.bf .L8
l.nop
/* Disable IC */
l.mfspr r6,r0,SPR_SR
l.addi r5,r0,-1
l.xori r5,r5,SPR_SR_ICE
l.and r5,r6,r5
l.mtspr r0,r5,SPR_SR
/* Establish cache block size
If BS=0, 16;
If BS=1, 32;
r14 contain block size
*/
l.mfspr r24,r0,SPR_ICCFGR
l.andi r26,r24,SPR_ICCFGR_CBS
l.srli r28,r26,7
l.ori r30,r0,16
l.sll r14,r30,r28
/* Establish number of cache sets
r16 contains number of cache sets
r28 contains log(# of cache sets)
*/
l.andi r26,r24,SPR_ICCFGR_NCS
l.srli r28,r26,3
l.ori r30,r0,1
l.sll r16,r30,r28
/* Invalidate IC */
l.addi r6,r0,0
l.sll r5,r14,r28
.L7:
l.mtspr r0,r6,SPR_ICBIR
l.sfne r6,r5
l.bf .L7
l.add r6,r6,r14
/* Enable IC */
l.mfspr r6,r0,SPR_SR
l.ori r6,r6,SPR_SR_ICE
l.mtspr r0,r6,SPR_SR
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
l.nop
.L8:
/* Data cache enable */
/* Check if DC present and skip enabling otherwise */
l.mfspr r24,r0,SPR_UPR
l.andi r26,r24,SPR_UPR_DCP
l.sfeq r26,r0
l.bf .L10
l.nop
/* Disable DC */
l.mfspr r6,r0,SPR_SR
l.addi r5,r0,-1
l.xori r5,r5,SPR_SR_DCE
l.and r5,r6,r5
l.mtspr r0,r5,SPR_SR
/* Establish cache block size
If BS=0, 16;
If BS=1, 32;
r14 contain block size
*/
l.mfspr r24,r0,SPR_DCCFGR
l.andi r26,r24,SPR_DCCFGR_CBS
l.srli r28,r26,7
l.ori r30,r0,16
l.sll r14,r30,r28
/* Establish number of cache sets
r16 contains number of cache sets
r28 contains log(# of cache sets)
*/
l.andi r26,r24,SPR_DCCFGR_NCS
l.srli r28,r26,3
l.ori r30,r0,1
l.sll r16,r30,r28
/* Invalidate DC */
l.addi r6,r0,0
l.sll r5,r14,r28
.L9:
l.mtspr r0,r6,SPR_DCBIR
l.sfne r6,r5
l.bf .L9
l.add r6,r6,r14
/* Enable DC */
l.mfspr r6,r0,SPR_SR
l.ori r6,r6,SPR_SR_DCE
l.mtspr r0,r6,SPR_SR
.L10:
// Kick off test
l.jal _main
l.nop
/* =================================================== [ main ] === */
.global _main
_main:
l.movhi r3, 0
l.movhi r4, 0 // Bit we're checking works
l.movhi r5, 0
l.ori r6, r0, 32
l.movhi r7, 0 // Register we'll put a value in to check with l.ff1
#define REPORT(reg) l.or r3, reg, r0 ; \
l.nop 0x2
ff1_loop:
// Set a loop going, creating a register with a '1' in a known position
// and checking the output of the l.ff1
l.ori r7, r0, 1 // Put 1 in bit 0
l.sll r7, r7, r4 // Shift '1' by r4
REPORT(r7) // Report value
l.ff1 r5, r7 // Do Find First '1' op
l.fl1 r8, r7 // Do Find Last '1' op
REPORT(r5) // Report value
REPORT(r8) // Report value
l.addi r4, r4, 1 // Increment bit we're checking (will also be
// result from l.ff1)
REPORT(r4) // Report value
l.sfne r5, r4 // r5 should = r4
l.bf ff1_error
l.sfne r8, r4 // r8 should = r4
l.bf fl1_error
l.sfne r6, r4 // Check if loop is finished
l.bf ff1_loop // Keep checking
l.nop
l.j ffl1_test2 // All OK, next test
l.nop
ffl1_test2:
// Try 3 values - all '0', all '1' and a block of values in between
l.movhi r4, 0
l.movhi r5, 0xffff
l.ori r5, r5, 0xffff
l.movhi r6, 0x00ff
l.ori r6, r6, 0xff00
// Test '0'
REPORT(r4)
l.ff1 r7, r4
l.fl1 r8, r4
REPORT(r7)
REPORT(r8)
l.sfnei r7, 0
l.bf ff1_error
l.sfnei r8, 0
l.bf fl1_error
// Test '0xffffffff'
REPORT(r5)
l.ff1 r7, r5
l.fl1 r8, r5
REPORT(r7)
REPORT(r8)
l.sfnei r7, 1
l.bf ff1_error
l.sfnei r8, 32
l.bf fl1_error
// Test '0x00ffff00'
REPORT(r6)
l.ff1 r7, r6
l.fl1 r8, r6
REPORT(r7)
REPORT(r8)
l.sfnei r7, 9
l.bf ff1_error
l.sfnei r8, 24
l.bf fl1_error
l.nop
l.j ffl1_ok // Tests OK
ff1_error:
l.movhi r3, hi(0xbaaadff1)
l.ori r3, r3, lo(0xbaaadff1)
l.nop 0x1
fl1_error:
l.movhi r3, hi(0xbaaadf11)
l.ori r3, r3, lo(0xbaaadf11)
l.nop 0x1
ffl1_ok:
l.movhi r3, hi(0x8000000d)
l.ori r3, r3, lo(0x8000000d)
l.nop 0x2 /* Report */
l.ori r3, r0, 0 /* Return 0 */
l.nop 0x1
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