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jeremybenn |
/* inst-set-test.h. Macros for instruction set testing
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Copyright (C) 1999-2006 OpenCores
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Copyright (C) 2010 Embecosm Limited
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Contributors various OpenCores participants
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of OpenRISC 1000 Architectural Simulator.
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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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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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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http: www.gnu.org/licenses/>. */
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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 "spr-defs.h"
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#include "board.h"
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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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* Useful constants
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* ------------------------------------------------------------------------- */
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/* Indicator of completion */
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#define ALL_DONE (0xdeaddead)
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/* Logical values */
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#define TRUE 1
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#define FALSE 0
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/* ----------------------------------------------------------------------------
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* Macro to push a register onto the stack
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*
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* r1 points to the next free slot. Push the supplied register on, then
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* advance the stack pointer.
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*
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* Arguments:
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* reg The register to push
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*
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* Registers modified
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* r1
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* ------------------------------------------------------------------------- */
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#define PUSH(reg) \
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l.sw 0(r1),reg /* Push */ ;\
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l.addi r1,r1,4 /* Advance the stack */
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/* ----------------------------------------------------------------------------
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* Macro to pop a register off the stack
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*
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* r1 points to the next free slot. Decrement the stack pointer, then pop the
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* requested register.
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*
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* Arguments:
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* reg The register to pop
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*
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* Registers modified
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* r1
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* ------------------------------------------------------------------------- */
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#define POP(reg) \
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l.addi r1,r1,-4 /* Decrement the stack */ ;\
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l.lws reg,0(r1) /* Pop */
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/* ----------------------------------------------------------------------------
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* Macro to load a 32-bit constant into a register
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*
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* Arguments:
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* reg The register to load
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* val The value to load
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*
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* ------------------------------------------------------------------------- */
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#define LOAD_CONST(reg,val) \
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l.movhi reg,hi(val) ;\
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l.ori reg,reg,lo(val)
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/* ----------------------------------------------------------------------------
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* Macro to define and load a pointer to a string
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*
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* Arguments:
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* reg The register to load
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* str The string
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*
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* ------------------------------------------------------------------------- */
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#define LOAD_STR(reg,str) \
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.section .rodata ;\
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1: ;\
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.string str ;\
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;\
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.section .text ;\
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l.movhi reg,hi(1b) ;\
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l.ori reg,reg,lo(1b)
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/* ----------------------------------------------------------------------------
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* Macro to print a character
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*
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* Arguments:
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* c The character to print
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* ------------------------------------------------------------------------- */
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#define PUTC(c) \
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l.addi r3,r0,c ;\
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l.nop NOP_PUTC
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/* ----------------------------------------------------------------------------
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* Macro for recording the result of a test
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*
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* The test result is in r4. Print out the name of test indented two spaces,
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* followed by ": ", either "OK" or "Failed" and a newline.
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*
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* Arguments:
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* str Textual name of the test
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* reg The result to test (not r2)
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* val Desired result of the test
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* ------------------------------------------------------------------------- */
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#define CHECK_RES(str,reg,val) \
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.section .rodata ;\
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2: ;\
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.string str ;\
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;\
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.section .text ;\
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PUSH (reg) /* Save the register to test */ ;\
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;\
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LOAD_CONST (r3,2b) /* Print out the string */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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LOAD_CONST(r2,val) /* The desired result */ ;\
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POP (reg) /* The register to test */ ;\
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PUSH (reg) /* May need again later */ ;\
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l.sfeq r2,reg /* Does the result match? */ ;\
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l.bf 3f ;\
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l.nop ;\
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;\
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l.jal _pfail /* Test failed */ ;\
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l.nop ;\
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POP (reg) /* Report the register */ ;\
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l.add r3,r0,reg ;\
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l.j 4f ;\
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l.nop NOP_REPORT ;\
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3: ;\
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POP (reg) /* Discard the register */ ;\
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l.jal _pok /* Test succeeded */ ;\
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l.nop ;\
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4:
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/* ----------------------------------------------------------------------------
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* Macro for recording the result of a comparison
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*
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* If the flag is set print the string argument indented by 2 spaces, followed
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* by "TRUE" and a newline, otherwise print the string argument indented by
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* two spaces, followed by "FALSE" and a newline.
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*
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* Arguments:
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* str Textual name of the test
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* res Expected result (TRUE or FALSE)
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* ------------------------------------------------------------------------- */
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#define CHECK_FLAG(str,res) \
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.section .rodata ;\
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5: ;\
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.string str ;\
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;\
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.section .text ;\
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l.bnf 7f /* Branch if result FALSE */ ;\
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;\
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/* Branch for TRUE result */ ;\
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LOAD_CONST (r3,5b) /* The string to print */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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l.addi r2,r0,TRUE /* Was it expected? */ ;\
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l.addi r3,r0,res ;\
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l.sfeq r2,r3 ;\
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l.bnf 6f /* Branch if not expected */ ;\
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;\
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/* Sub-branch for TRUE found and expected */ ;\
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l.jal _ptrue ;\
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l.nop ;\
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PUTC ('\n') ;\
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l.j 9f ;\
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l.nop ;\
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6: ;\
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/* Sub-branch for TRUE found and not expected */ ;\
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l.jal _ptrue ;\
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l.nop ;\
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l.jal _punexpected ;\
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l.nop ;\
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l.j 9f ;\
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l.nop ;\
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;\
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7: ;\
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/* Branch for FALSE result */ ;\
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LOAD_CONST (r3,5b) /* The string to print */ ;\
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l.jal _ptest ;\
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l.nop ;\
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;\
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l.addi r2,r0,FALSE /* Was it expected? */ ;\
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l.addi r3,r0,res ;\
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l.sfeq r2,r3 ;\
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l.bnf 8f /* Branch if not expected */ ;\
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;\
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/* Sub-branch for FALSE found and expected */ ;\
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l.jal _pfalse ;\
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l.nop ;\
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PUTC ('\n') ;\
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l.j 9f ;\
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l.nop ;\
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8: ;\
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/* Sub-branch for FALSE found and not expected */ ;\
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l.jal _pfalse ;\
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l.nop ;\
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l.jal _punexpected ;\
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l.nop ;\
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9:
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/* ----------------------------------------------------------------------------
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* Macro to report 0xdeaddead and then terminate
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* ------------------------------------------------------------------------- */
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#define TEST_EXIT \
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l.movhi r3,hi(ALL_DONE) ;\
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l.ori r3,r3,lo(ALL_DONE) ;\
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l.nop NOP_REPORT ;\
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;\
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l.addi r3,r0,0 ;\
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l.nop NOP_EXIT
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