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jeremybenn |
/* is-lws-test.S. l.lws instruction test of Or1ksim
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*
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* Copyright (C) 1999-2006 OpenCores
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* Copyright (C) 2010 Embecosm Limited
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*
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* Contributors various OpenCores participants
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* Contributor Jeremy Bennett
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*
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* This file is part of OpenRISC 1000 Architectural Simulator.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see .
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*/
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/* ----------------------------------------------------------------------------
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* Coding conventions
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*
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* A simple rising stack is provided starting at _stack and pointed to by
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* r1. r1 points to the next free word. Only 32-bit registers may be pushed
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* onto the stack.
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*
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* Local labels up to 49 are reserved for macros. Each is used only once in
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* all macros. You can get in a serious mess if you get local label clashing
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* in macros.
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*
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* Arguments to functions are passed in r3 through r8.
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* r9 is the link (return address)
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* r11 is for returning results
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*
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* Only r1 and r2 are preserved across function calls. It is up to the callee
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* to save any other registers required.
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* ------------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------------
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* Test coverage
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*
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* The l.lws instruction was omitted from Or1ksim originally. It is specified
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* for ORBIS32, even though it is functionally equivalent to l.lwz.
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*
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* Having fixed the problem, this is (in good software engineering style), a
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* regresison test to go with the fix.
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*
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* Of course what is really needed is a comprehensive instruction test...
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* ------------------------------------------------------------------------- */
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#include "inst-set-test.h"
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/* ----------------------------------------------------------------------------
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* Test of load single word and extend with sign: l.lws
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* ------------------------------------------------------------------------- */
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.section .rodata
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.balign 4
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50: .word 0xdeadbeef
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51: .word 0x00000000
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52: .word 0x7fffffff
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53: .word 0x80000000
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54: .word 0xffffffff
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.section .text
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.global _start
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_start:
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LOAD_STR (r3, "l.lws\n")
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l.jal _puts
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l.nop
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/* Load with zero offset */
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LOAD_CONST (r5,50b)
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l.lws r4,0(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0xdeadbeef: ", r4, 0xdeadbeef)
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LOAD_CONST (r5,51b)
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l.lws r4,0(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
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LOAD_CONST (r5,52b)
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l.lws r4,0(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
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LOAD_CONST (r5,53b)
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l.lws r4,0(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
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LOAD_CONST (r5,54b)
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l.lws r4,0(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0xffffffff: ", r4, 0xffffffff)
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/* Load with positive offset */
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LOAD_CONST (r5,50b)
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l.lws r4,4(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
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LOAD_CONST (r5,50b)
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l.lws r4,8(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
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LOAD_CONST (r5,50b)
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l.lws r4,12(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
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LOAD_CONST (r5,50b)
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l.lws r4,16(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0xffffffff: ", r4, 0xffffffff)
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/* Load with negative offset */
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LOAD_CONST (r5,54b)
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l.lws r4,-16(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0xdeadbeef: ", r4, 0xdeadbeef)
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LOAD_CONST (r5,54b)
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l.lws r4,-12(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x00000000: ", r4, 0x00000000)
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LOAD_CONST (r5,54b)
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l.lws r4,-8(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x7fffffff: ", r4, 0x7fffffff)
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LOAD_CONST (r5,54b)
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l.lws r4,-4(r5)
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CHECK_RES (" l.lws r4,0(r5): r4=0x80000000: ", r4, 0x80000000)
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/* ----------------------------------------------------------------------------
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* All done
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* ------------------------------------------------------------------------- */
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_exit:
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LOAD_STR (r3, "Test completed\n")
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l.jal _puts
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l.nop
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TEST_EXIT
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