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[/] [openrisc/] [trunk/] [or1ksim/] [testsuite/] [test-code-or1k/] [inst-set-test/] [inst-set-test.S] - Rev 165
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/* inst-set-test.S. Instruction set test library for Or1ksim
*
* Copyright (C) 1999-2006 OpenCores
* Copyright (C) 2010 Embecosm Limited
*
* Contributors various OpenCores participants
* Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
*
* This file is part of OpenRISC 1000 Architectural Simulator.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http: www.gnu.org/licenses/>.
*/
/* ----------------------------------------------------------------------------
* Coding conventions
*
* A simple rising stack is provided starting at _stack and pointed to by
* r1. r1 points to the next free word. Only 32-bit registers may be pushed
* onto the stack.
*
* Local labels up to 49 are reserved for macros. Each is used only once in
* all macros. You can get in a serious mess if you get local label clashing
* in macros.
*
* Arguments to functions are passed in r3 through r8.
* r9 is the link (return address)
* r11 is for returning results
*
* All registers apart from r2, r9 and r11 are preserved across function calls.
* ------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------
* This library contains the stack implementation and reset sequence and a set
* of library functions.
*
* The functions provided here provide simple utilities that are useful when
* writing tests in assembler.
* ------------------------------------------------------------------------- */
#include "inst-set-test.h"
/* ----------------------------------------------------------------------------
* Simple stack, will be pointed to by r1, which is the next empty slot
* ------------------------------------------------------------------------- */
.section .stack
.balign 4
.global _stack
_stack:
.space 0x1000,0x0
/* ----------------------------------------------------------------------------
* Exception handling
* ------------------------------------------------------------------------- */
.section .boot-text
/* ----------------------------------------------------------------------------
* Reset exception
*
* Set up the stack and jump to _start
* ------------------------------------------------------------------------- */
.org 0x100
.global _reset
_reset:
l.movhi r1,hi(_stack) /* Set up the stack */
l.ori r1,r1,lo(_stack)
l.j _start /* Jump to the start of code */
l.nop
/* ----------------------------------------------------------------------------
* Alignment exception
*
* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
* text section.
*
* The handling is a bit dubious at present. We just patch the instruction and
* restart. This will go wrong in branch delay slots. Really we need to single
* step past and then continue.
*
* Print a message identifying the exception type.
* ------------------------------------------------------------------------- */
.section .rodata
50: .string " ALIGNMENT exception\n"
.section .boot-text
.org 0x600
.global _align
_align:
/* Report exception */
LOAD_CONST (r3, 50b)
l.jal _puts
l.nop
/* Patch with l.nop */
l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
LOAD_CONST (r3, 0x15000000) /* l.nop */
l.sw 0(r2),r3
/* All done */
l.rfe
_align_end:
/* ----------------------------------------------------------------------------
* Illegal instruction exception
*
* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
* text section.
*
* The handling is a bit dubious at present. We just patch the instruction and
* restart. This will go wrong in branch delay slots. Really we need to single
* step past and then continue.
*
* Print a message identifying the exception type.
* ------------------------------------------------------------------------- */
.section .rodata
51: .string " ILLEGAL INSTRUCTION exception\n"
.section .boot-text
.org 0x700
.global _illegal
_illegal:
/* Report exception */
LOAD_CONST (r3, 51b)
l.jal _puts
l.nop
/* Patch with l.nop */
l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
LOAD_CONST (r3, 0x15000000) /* l.nop */
l.sw 0(r2),r3
/* All done */
l.rfe
_illegal_end:
/* ----------------------------------------------------------------------------
* Range exception
*
* Don't be tempted to use the LOAD_STR macro here, it will dump us back into
* text section.
*
* The handling is a bit dubious at present. We just patch the instruction and
* restart. This will go wrong in branch delay slots. Really we need to single
* step past and then continue.
*
* Print a message identifying the exception type.
* ------------------------------------------------------------------------- */
.section .rodata
52: .string " RANGE exception\n"
.section .boot-text
.org 0xb00
.global _range
_range:
/* Report exception */
LOAD_CONST (r3, 52b)
l.jal _puts
l.nop
/* Patch with l.nop */
l.mfspr r2,r0,SPR_EPCR_BASE /* Addr of problem instr */
LOAD_CONST (r3, 0x15000000) /* l.nop */
l.sw 0(r2),r3
/* All done */
l.rfe
_range_end:
/* ----------------------------------------------------------------------------
* End of exception vectors
*
* Guarantee the exception vector space does not have general purpose code
* ------------------------------------------------------------------------- */
.org 0xffc
l.nop
/* ----------------------------------------------------------------------------
* All subroutines are in the text section.
* ------------------------------------------------------------------------- */
.section .text
/* ----------------------------------------------------------------------------
* Subroutine to print out a string
*
* The string is followed by a newline
*
* Parameters:
* r3 Pointer to the string to print
* ------------------------------------------------------------------------- */
.global _puts
_puts:
PUSH (r3)
l.add r2,r0,r3 /* Copy the string pointer */
/* Loop getting and printing each char until end of string */
60: l.lbz r3,0(r2)
l.sfeq r3,r0 /* NULL termination? */
l.bf 61f
l.addi r2,r2,1 /* Delay slot, move to next char */
l.j 60b /* Repeat */
l.nop NOP_PUTC /* Delay slot */
61: POP (r3)
l.jr r9 /* Return */
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out a register in hex
*
* Parameters:
* r3 The value to print
* ------------------------------------------------------------------------- */
.section .rodata
62: .string "0123456789abcdef"
.section .text
.global _puth
_puth:
PUSH (r3)
PUSH (r4)
l.add r2,r0,r3 /* Copy the value pointer */
LOAD_CONST (r4,62b) /* Ptr to digit chars */
l.srli r3,r2,28 /* Print each digit in turn. */
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,24
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,20
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,16
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,12
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,8
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,4
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.andi r3,r2,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
POP (r4) /* Return */
POP (r3)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out the lower half of a register in hex
*
* Parameters:
* r3 The value to print
* ------------------------------------------------------------------------- */
.section .rodata
63: .string "0123456789abcdef"
.section .text
.global _puthh
_puthh:
PUSH (r3)
PUSH (r4)
l.add r2,r0,r3 /* Copy the value pointer */
LOAD_CONST (r4,63b) /* Ptr to digit chars */
l.srli r3,r2,12 /* Print each digit in turn. */
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,8
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.srli r3,r2,4
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.andi r3,r2,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
POP (r4) /* Return */
POP (r3)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out the lowest byte of a register in hex
*
* Parameters:
* r3 The value to print
* ------------------------------------------------------------------------- */
.section .rodata
63: .string "0123456789abcdef"
.section .text
.global _puthq
_puthq:
PUSH (r3)
PUSH (r4)
l.add r2,r0,r3 /* Copy the value pointer */
LOAD_CONST (r4,63b) /* Ptr to digit chars */
l.srli r3,r2,4 /* Print each digit in turn. */
l.andi r3,r3,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
l.andi r3,r2,0xf
l.add r3,r4,r3
l.lbz r3,0(r3)
l.nop NOP_PUTC
POP (r4) /* Return */
POP (r3)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out a test name prompt
*
* The string is preceded by two spaces
*
* Parameters:
* r3 Pointer to the test name to print
* ------------------------------------------------------------------------- */
.global _ptest
_ptest:
PUSH (r9) /* Save the return address */
PUSH (r3) /* Save the test name for later */
LOAD_STR (r3, " ") /* Prefix */
l.jal _puts
l.nop
POP(r3) /* Test name */
l.jal _puts
l.nop
POP (r9)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out "OK"
*
* The string is followed by a newline
* ------------------------------------------------------------------------- */
.global _pok
_pok:
PUSH (r9) /* Save the return address */
PUSH (r3)
LOAD_STR (r3, "OK\n")
l.jal _puts
l.nop
POP (r3)
POP (r9)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out "Failed"
*
* The string is followed by a ": ", which will then allow a report
* ------------------------------------------------------------------------- */
.global _pfail
_pfail:
PUSH (r9) /* Save the return address */
PUSH (r3)
LOAD_STR (r3, "Failed: ")
l.jal _puts
l.nop
POP (r3)
POP (r9)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out "TRUE"
* ------------------------------------------------------------------------- */
.global _ptrue
_ptrue:
PUSH (r9) /* Save the return address */
PUSH (r3)
LOAD_STR (r3, "TRUE")
l.jal _puts
l.nop
POP (r3)
POP (r9)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out "FALSE"
* ------------------------------------------------------------------------- */
.global _pfalse
_pfalse:
PUSH (r9) /* Save the return address */
PUSH (r3)
LOAD_STR (r3, "FALSE")
l.jal _puts
l.nop
POP (r3)
POP (r9)
l.jr r9
l.nop
/* ----------------------------------------------------------------------------
* Subroutine to print out "unexpected"
*
* Preceded by a space and followed by a newline
* ------------------------------------------------------------------------- */
.global _punexpected
_punexpected:
PUSH (r9) /* Save the return address */
PUSH (r3)
LOAD_STR (r3, " unexpected\n")
l.jal _puts
l.nop
POP (r3)
POP (r9)
l.jr r9
l.nop
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