/* is-mul-test.S. l.mul, l.muli and l.mulu instruction test of Or1ksim
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/* is-mul-test.S. l.mul, l.muli and l.mulu instruction test of Or1ksim
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*
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*
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* Copyright (C) 1999-2006 OpenCores
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* Copyright (C) 1999-2006 OpenCores
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* Copyright (C) 2010 Embecosm Limited
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* Copyright (C) 2010 Embecosm Limited
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*
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*
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* Contributors various OpenCores participants
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* Contributors various OpenCores participants
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* Contributor Jeremy Bennett
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* Contributor Jeremy Bennett
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*
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*
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* This file is part of OpenRISC 1000 Architectural Simulator.
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* This file is part of OpenRISC 1000 Architectural Simulator.
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*
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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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* 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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* 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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* Software Foundation; either version 3 of the License, or (at your option)
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* any later version.
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* any later version.
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*
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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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* 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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* 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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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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* more details.
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*
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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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* 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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* with this program. If not, see .
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*/
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*/
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Coding conventions are described in inst-set-test.S
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* Coding conventions are described in inst-set-test.S
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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|
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Test coverage
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* Test coverage
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*
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*
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* The l.mul, l.muli and l.mulu instructions should all be present and set the
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* The l.mul, l.muli and l.mulu instructions should all be present and set the
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* carry and overflow flags.
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* carry and overflow flags.
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*
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*
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* Problems in this area were reported in Bugs 1774, 1782, 1783 and 1784.
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* Problems in this area were reported in Bugs 1774, 1782, 1783 and 1784.
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* Having fixed the problem, this is (in good software engineering style), a
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* Having fixed the problem, this is (in good software engineering style), a
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* regression test to go with the fix.
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* regression test to go with the fix.
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*
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*
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* This is not a comprehensive test of any instruction (yet).
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* This is not a comprehensive test of any instruction (yet).
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*
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*
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* Of course what is really needed is a comprehensive instruction test...
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* Of course what is really needed is a comprehensive instruction test...
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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#include "inst-set-test.h"
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#include "inst-set-test.h"
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* A macro to carry out a test of multiply signed or unsigned
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* A macro to carry out a test of multiply signed or unsigned
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*
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*
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* Arguments
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* Arguments
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* opc: The opcode
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* opc: The opcode
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* op1: First operand value
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* op1: First operand value
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* op2: Second operand value
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* op2: Second operand value
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* res: Expected result
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* res: Expected result
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* cy: Expected carry flag
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* cy: Expected carry flag
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* ov: Expected overflow flag
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* ov: Expected overflow flag
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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#define TEST_MUL(opc, op1, op2, res, cy, ov) \
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#define TEST_MUL(opc, op1, op2, res, cy, ov) \
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l.mfspr r3,r0,SPR_SR ;\
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l.mfspr r3,r0,SPR_SR ;\
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LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV)) ;\
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LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV)) ;\
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l.and r3,r3,r2 /* Clear flags */ ;\
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l.and r3,r3,r2 /* Clear flags */ ;\
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l.mtspr r0,r3,SPR_SR ;\
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l.mtspr r0,r3,SPR_SR ;\
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;\
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;\
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LOAD_CONST (r5,op1) /* Load numbers to add */ ;\
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LOAD_CONST (r5,op1) /* Load numbers to add */ ;\
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LOAD_CONST (r6,op2) ;\
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LOAD_CONST (r6,op2) ;\
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l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\
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l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\
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50: opc r4,r5,r6 ;\
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50: opc r4,r5,r6 ;\
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l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\
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l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\
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l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\
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l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\
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PUSH (r5) /* Save EPCR for later */ ;\
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PUSH (r5) /* Save EPCR for later */ ;\
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PUSH (r2) /* Save SR for later */ ;\
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PUSH (r2) /* Save SR for later */ ;\
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PUSH (r4) /* Save result for later */ ;\
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PUSH (r4) /* Save result for later */ ;\
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;\
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;\
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PUTS (" 0x") ;\
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PUTS (" 0x") ;\
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PUTH (op1) ;\
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PUTH (op1) ;\
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PUTS (" * 0x") ;\
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PUTS (" * 0x") ;\
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PUTH (op2) ;\
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PUTH (op2) ;\
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PUTS (" = 0x") ;\
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PUTS (" = 0x") ;\
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PUTH (res) ;\
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PUTH (res) ;\
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PUTS (": ") ;\
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PUTS (": ") ;\
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POP (r4) ;\
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POP (r4) ;\
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CHECK_RES1 (r4, res) ;\
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CHECK_RES1 (r4, res) ;\
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;\
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;\
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POP (r2) /* Retrieve SR */ ;\
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POP (r2) /* Retrieve SR */ ;\
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PUSH (r2) ;\
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PUSH (r2) ;\
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LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\
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LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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CHECK_FLAG ("- carry flag set: ", cy) ;\
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CHECK_FLAG ("- carry flag set: ", cy) ;\
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;\
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;\
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POP (r2) /* Retrieve SR */ ;\
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POP (r2) /* Retrieve SR */ ;\
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LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\
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LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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CHECK_FLAG ("- overflow flag set: ", ov) ;\
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CHECK_FLAG ("- overflow flag set: ", ov) ;\
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;\
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;\
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POP (r2) /* Retrieve EPCR */ ;\
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POP (r2) /* Retrieve EPCR */ ;\
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LOAD_CONST (r4, 50b) /* The opcode of interest */ ;\
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LOAD_CONST (r4, 50b) /* The opcode of interest */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.bnf 51f ;\
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l.bnf 51f ;\
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;\
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;\
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PUTS (" - exception triggered: TRUE\n") ;\
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PUTS (" - exception triggered: TRUE\n") ;\
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l.j 52f ;\
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l.j 52f ;\
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l.nop ;\
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l.nop ;\
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;\
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;\
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51: PUTS (" - exception triggered: FALSE\n") ;\
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51: PUTS (" - exception triggered: FALSE\n") ;\
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52:
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52:
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* A macro to carry out a test of multiply immediate
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* A macro to carry out a test of multiply immediate
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*
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*
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* Arguments
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* Arguments
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* op1: First operand value
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* op1: First operand value
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* op2: Second operand value
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* op2: Second operand value
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* res: Expected result
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* res: Expected result
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* cy: Expected carry flag
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* cy: Expected carry flag
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* ov: Expected overflow flag
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* ov: Expected overflow flag
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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#define TEST_MULI(op1, op2, res, cy, ov) \
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#define TEST_MULI(op1, op2, res, cy, ov) \
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l.mfspr r3,r0,SPR_SR ;\
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l.mfspr r3,r0,SPR_SR ;\
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LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV)) ;\
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LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV)) ;\
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l.and r3,r3,r2 /* Clear flags */ ;\
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l.and r3,r3,r2 /* Clear flags */ ;\
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l.mtspr r0,r3,SPR_SR ;\
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l.mtspr r0,r3,SPR_SR ;\
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;\
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;\
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LOAD_CONST (r5,op1) /* Load numbers to add */ ;\
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LOAD_CONST (r5,op1) /* Load numbers to add */ ;\
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l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\
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l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\
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53: l.muli r4,r5,op2 ;\
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53: l.muli r4,r5,op2 ;\
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l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\
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l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\
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l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\
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l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\
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PUSH (r5) /* Save EPCR for later */ ;\
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PUSH (r5) /* Save EPCR for later */ ;\
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PUSH (r2) /* Save SR for later */ ;\
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PUSH (r2) /* Save SR for later */ ;\
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PUSH (r4) /* Save result for later */ ;\
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PUSH (r4) /* Save result for later */ ;\
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;\
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;\
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PUTS (" 0x") ;\
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PUTS (" 0x") ;\
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PUTH (op1) ;\
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PUTH (op1) ;\
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PUTS (" * 0x") ;\
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PUTS (" * 0x") ;\
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PUTHH (op2) ;\
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PUTHH (op2) ;\
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PUTS (" = 0x") ;\
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PUTS (" = 0x") ;\
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PUTH (res) ;\
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PUTH (res) ;\
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PUTS (": ") ;\
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PUTS (": ") ;\
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POP (r4) ;\
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POP (r4) ;\
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CHECK_RES1 (r4, res) ;\
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CHECK_RES1 (r4, res) ;\
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;\
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;\
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POP(r2) /* Retrieve SR */ ;\
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POP(r2) /* Retrieve SR */ ;\
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PUSH(r2) ;\
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PUSH(r2) ;\
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LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\
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LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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CHECK_FLAG ("- carry flag set: ", cy) ;\
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CHECK_FLAG ("- carry flag set: ", cy) ;\
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;\
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;\
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POP(r2) /* Retrieve SR */ ;\
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POP(r2) /* Retrieve SR */ ;\
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LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\
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LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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CHECK_FLAG ("- overflow flag set: ", ov) ;\
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CHECK_FLAG ("- overflow flag set: ", ov) ;\
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;\
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;\
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POP (r2) /* Retrieve EPCR */ ;\
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POP (r2) /* Retrieve EPCR */ ;\
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LOAD_CONST (r4, 53b) /* The opcode of interest */ ;\
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LOAD_CONST (r4, 53b) /* The opcode of interest */ ;\
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l.and r2,r2,r4 ;\
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l.and r2,r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.sfeq r2,r4 ;\
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l.bnf 54f ;\
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l.bnf 54f ;\
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;\
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;\
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PUTS (" - exception triggered: TRUE\n") ;\
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PUTS (" - exception triggered: TRUE\n") ;\
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l.j 55f ;\
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l.j 55f ;\
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l.nop ;\
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l.nop ;\
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;\
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;\
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54: PUTS (" - exception triggered: FALSE\n") ;\
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54: PUTS (" - exception triggered: FALSE\n") ;\
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55:
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55:
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Start of code
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* Start of code
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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.section .text
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.section .text
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.global _start
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.global _start
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_start:
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_start:
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l.mfspr r3,r0,SPR_SR
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l.mfspr r3,r0,SPR_SR
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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l.and r3,r3,r2
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l.and r3,r3,r2
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l.mtspr r0,r3,SPR_SR
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l.mtspr r0,r3,SPR_SR
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|
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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|
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
|
* Test of multiply signed, l.mul
|
* Test of multiply signed, l.mul
|
* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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_mul:
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_mul:
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LOAD_STR (r3, "l.mul\n")
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LOAD_STR (r3, "l.mul\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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|
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/* Multiply two small positive numbers. Should set no flags. */
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/* Multiply two small positive numbers. Should set no flags. */
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TEST_MUL (l.mul, 0x00000002, 0x00000003,
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TEST_MUL (l.mul, 0x00000002, 0x00000003,
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0x00000006, FALSE, FALSE)
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0x00000006, FALSE, FALSE)
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|
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/* Multiply two quite large positive numbers. Should set no flags */
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/* Multiply two quite large positive numbers. Should set no flags */
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TEST_MUL (l.mul, 0x00008001, 0x0000fffe,
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TEST_MUL (l.mul, 0x00008001, 0x0000fffe,
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0x7ffffffe, FALSE, FALSE)
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0x7ffffffe, FALSE, FALSE)
|
|
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/* Multiply two slightly too large positive numbers. Should set the
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/* Multiply two slightly too large positive numbers. Should set the
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overflow, but not the carry flag */
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overflow, but not the carry flag */
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TEST_MUL (l.mul, 0x00008000, 0x00010000,
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TEST_MUL (l.mul, 0x00008000, 0x00010000,
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0x80000000, FALSE, TRUE)
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0x80000000, FALSE, TRUE)
|
|
|
/* Multiply two large positive numbers. Should set both the carry and
|
/* Multiply two large positive numbers. Should set both the carry and
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overflow flags (even though the result is not a negative number. */
|
overflow flags (even though the result is not a negative number. */
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TEST_MUL (l.mul, 0x00010000, 0x00010000, 0x00000000, TRUE, TRUE)
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TEST_MUL (l.mul, 0x00010000, 0x00010000, 0x00000000, TRUE, TRUE)
|
|
|
/* Multiply two small negative numbers. Should set the overflow, but not
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/* Multiply two small negative numbers. Should set the overflow, but not
|
the carry flag. */
|
the carry flag. */
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TEST_MUL (l.mul, 0xfffffffe, 0xfffffffd,
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TEST_MUL (l.mul, 0xfffffffe, 0xfffffffd,
|
0x00000006, TRUE, FALSE)
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0x00000006, TRUE, FALSE)
|
|
|
/* Multiply two quite large negative numbers. Should set the overflow,
|
/* Multiply two quite large negative numbers. Should set the overflow,
|
but not the carry flag. */
|
but not the carry flag. */
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TEST_MUL (l.mul, 0xffff7fff, 0xffff0002,
|
TEST_MUL (l.mul, 0xffff7fff, 0xffff0002,
|
0x7ffffffe, TRUE, FALSE)
|
0x7ffffffe, TRUE, FALSE)
|
|
|
/* Multiply two slightly too large negative numbers. Should set both the
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/* Multiply two slightly too large negative numbers. Should set both the
|
overflow, and the carry flags */
|
overflow, and the carry flags */
|
TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,
|
TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,
|
0x80010000, TRUE, TRUE)
|
0x80010000, TRUE, TRUE)
|
|
|
/* Multiply two large negative numbers. Should set the
|
/* Multiply two large negative numbers. Should set the
|
both the carry and overflow flags (even though the result is a
|
both the carry and overflow flags (even though the result is a
|
positive number. */
|
positive number. */
|
TEST_MUL (l.mul, 0xffff0000, 0xfffeffff,
|
TEST_MUL (l.mul, 0xffff0000, 0xfffeffff,
|
0x00010000, TRUE, TRUE)
|
0x00010000, TRUE, TRUE)
|
|
|
/* Multiply one small negative number and one small positive number.
|
/* Multiply one small negative number and one small positive number.
|
Should set the overflow, but not the carry flag. */
|
Should set the overflow, but not the carry flag. */
|
TEST_MUL (l.mul, 0x00000002, 0xfffffffd,
|
TEST_MUL (l.mul, 0x00000002, 0xfffffffd,
|
0xfffffffa, TRUE, FALSE)
|
0xfffffffa, TRUE, FALSE)
|
|
|
/* Multiply one quite large negative number and one quite large
|
/* Multiply one quite large negative number and one quite large
|
positive number. Should set the overflow, but not the carry flag. */
|
positive number. Should set the overflow, but not the carry flag. */
|
TEST_MUL (l.mul, 0xffff8000, 0x00010000,
|
TEST_MUL (l.mul, 0xffff8000, 0x00010000,
|
0x80000000, TRUE, FALSE)
|
0x80000000, TRUE, FALSE)
|
|
|
/* Multiply one slightly too large negative number and one slightly
|
/* Multiply one slightly too large negative number and one slightly
|
too large positive number. Should set both the carry and overflow
|
too large positive number. Should set both the carry and overflow
|
flags. */
|
flags. */
|
TEST_MUL (l.mul, 0xffff7fff, 0x00010000,
|
TEST_MUL (l.mul, 0xffff7fff, 0x00010000,
|
0x7fff0000, TRUE, TRUE)
|
0x7fff0000, TRUE, TRUE)
|
|
|
/* Multiply the largest negative number by positive unity. Should set
|
/* Multiply the largest negative number by positive unity. Should set
|
neither carry, nor overflow flag. */
|
neither carry, nor overflow flag. */
|
TEST_MUL (l.mul, 0x80000000, 0x00000001,
|
TEST_MUL (l.mul, 0x80000000, 0x00000001,
|
0x80000000, FALSE, FALSE)
|
0x80000000, FALSE, FALSE)
|
|
|
/* Check that range exceptions are triggered */
|
/* Check that range exceptions are triggered */
|
l.mfspr r3,r0,SPR_SR
|
l.mfspr r3,r0,SPR_SR
|
LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
|
LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
|
l.or r3,r3,r2
|
l.or r3,r3,r2
|
l.mtspr r0,r3,SPR_SR
|
l.mtspr r0,r3,SPR_SR
|
|
|
LOAD_STR (r3, " ** OVE flag set **\n")
|
LOAD_STR (r3, " ** OVE flag set **\n")
|
l.jal _puts
|
l.jal _puts
|
l.nop
|
l.nop
|
|
|
/* Check that an overflow alone causes a RANGE Exception. */
|
/* Check that an overflow alone causes a RANGE Exception. */
|
TEST_MUL (l.mul, 0x00008000, 0x00010000,
|
TEST_MUL (l.mul, 0x00008000, 0x00010000,
|
0x80000000, FALSE, TRUE)
|
0x80000000, FALSE, TRUE)
|
|
|
/* Check that a carry alone does not cause a RANGE Exception. */
|
/* Check that a carry alone does not cause a RANGE Exception. */
|
TEST_MUL (l.mul, 0x00000002, 0xfffffffd,
|
TEST_MUL (l.mul, 0x00000002, 0xfffffffd,
|
0xfffffffa, TRUE, FALSE)
|
0xfffffffa, TRUE, FALSE)
|
|
|
/* Check that carry and overflow together cause an exception. */
|
/* Check that carry and overflow together cause an exception. */
|
TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,
|
TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,
|
0x80010000, TRUE, TRUE)
|
0x80010000, TRUE, TRUE)
|
|
|
/* Finished checking range exceptions */
|
/* Finished checking range exceptions */
|
l.mfspr r3,r0,SPR_SR
|
l.mfspr r3,r0,SPR_SR
|
LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
|
LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
|
l.and r3,r3,r2
|
l.and r3,r3,r2
|
l.mtspr r0,r3,SPR_SR
|
l.mtspr r0,r3,SPR_SR
|
|
|
LOAD_STR (r3, " ** OVE flag cleared **\n")
|
LOAD_STR (r3, " ** OVE flag cleared **\n")
|
l.jal _puts
|
l.jal _puts
|
l.nop
|
l.nop
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Test of multiply signed, l.muli
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* Test of multiply signed, l.muli
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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_muli:
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_muli:
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LOAD_STR (r3, "l.muli\n")
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LOAD_STR (r3, "l.muli\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* Multiply two small positive numbers. Should set no flags. */
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/* Multiply two small positive numbers. Should set no flags. */
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TEST_MULI (0x00000002, 0x0003,
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TEST_MULI (0x00000002, 0x0003,
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0x00000006, FALSE, FALSE)
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0x00000006, FALSE, FALSE)
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/* Multiply two quite large positive numbers. Should set no flags */
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/* Multiply two quite large positive numbers. Should set no flags */
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TEST_MULI (0x00010002, 0x7fff,
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TEST_MULI (0x00010002, 0x7fff,
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0x7ffffffe, FALSE, FALSE)
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0x7ffffffe, FALSE, FALSE)
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/* Multiply two slightly too large positive numbers. Should set the
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/* Multiply two slightly too large positive numbers. Should set the
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overflow, but not the carry flag */
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overflow, but not the carry flag */
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TEST_MULI (0x00020000, 0x4000,
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TEST_MULI (0x00020000, 0x4000,
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0x80000000, FALSE, TRUE)
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0x80000000, FALSE, TRUE)
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/* Multiply two large positive numbers. Should set both the carry and
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/* Multiply two large positive numbers. Should set both the carry and
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overflow flags (even though the result is not a negative number. */
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overflow flags (even though the result is not a negative number. */
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TEST_MULI (0x00040000, 0x4000,
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TEST_MULI (0x00040000, 0x4000,
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0x00000000, TRUE, TRUE)
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0x00000000, TRUE, TRUE)
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/* Multiply two small negative numbers. Should set the overflow, but not
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/* Multiply two small negative numbers. Should set the overflow, but not
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the carry flag. */
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the carry flag. */
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TEST_MULI (0xfffffffe, 0xfffd,
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TEST_MULI (0xfffffffe, 0xfffd,
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0x00000006, TRUE, FALSE)
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0x00000006, TRUE, FALSE)
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/* Multiply two quite large negative numbers. Should set the overflow,
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/* Multiply two quite large negative numbers. Should set the overflow,
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but not the carry flag. */
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but not the carry flag. */
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TEST_MULI (0xfffefffe, 0x8001,
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TEST_MULI (0xfffefffe, 0x8001,
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0x7ffffffe, TRUE, FALSE)
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0x7ffffffe, TRUE, FALSE)
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/* Multiply two slightly too large negative numbers. Should set both the
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/* Multiply two slightly too large negative numbers. Should set both the
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overflow, and the carry flags */
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overflow, and the carry flags */
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TEST_MULI (0xfffe0000, 0xbfff,
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TEST_MULI (0xfffe0000, 0xbfff,
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0x80020000, TRUE, TRUE)
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0x80020000, TRUE, TRUE)
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/* Multiply two large negative numbers. Should set the
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/* Multiply two large negative numbers. Should set the
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both the carry and overflow flags (even though the result is a
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both the carry and overflow flags (even though the result is a
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positive number. */
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positive number. */
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TEST_MULI (0xfffdfffe, 0x8000,
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TEST_MULI (0xfffdfffe, 0x8000,
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0x00010000, TRUE, TRUE)
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0x00010000, TRUE, TRUE)
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/* Multiply one small negative number and one small positive number.
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/* Multiply one small negative number and one small positive number.
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Should set the overflow, but not the carry flag. */
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Should set the overflow, but not the carry flag. */
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TEST_MULI (0x00000002, 0xfffd,
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TEST_MULI (0x00000002, 0xfffd,
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0xfffffffa, TRUE, FALSE)
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0xfffffffa, TRUE, FALSE)
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/* Multiply one quite large negative number and one quite large
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/* Multiply one quite large negative number and one quite large
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positive number. Should set the overflow, but not the carry flag. */
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positive number. Should set the overflow, but not the carry flag. */
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TEST_MULI (0x00010000, 0x8000,
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TEST_MULI (0x00010000, 0x8000,
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0x80000000, TRUE, FALSE)
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0x80000000, TRUE, FALSE)
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/* Multiply one slightly too large negative number and one slightly
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/* Multiply one slightly too large negative number and one slightly
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too large positive number. Should set both the carry and overflow
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too large positive number. Should set both the carry and overflow
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flags. */
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flags. */
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TEST_MULI (0xfffdfffc, 0x4000,
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TEST_MULI (0xfffdfffc, 0x4000,
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0x7fff0000, TRUE, TRUE)
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0x7fff0000, TRUE, TRUE)
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/* Multiply the largest negative number by positive unity. Should set
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/* Multiply the largest negative number by positive unity. Should set
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neither carry, nor overflow flag. */
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neither carry, nor overflow flag. */
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TEST_MULI (0x80000000, 0x0001,
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TEST_MULI (0x80000000, 0x0001,
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0x80000000, FALSE, FALSE)
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0x80000000, FALSE, FALSE)
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/* Check that range exceptions are triggered */
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/* Check that range exceptions are triggered */
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l.mfspr r3,r0,SPR_SR
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l.mfspr r3,r0,SPR_SR
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LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
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LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
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l.or r3,r3,r2
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l.or r3,r3,r2
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l.mtspr r0,r3,SPR_SR
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l.mtspr r0,r3,SPR_SR
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LOAD_STR (r3, " ** OVE flag set **\n")
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LOAD_STR (r3, " ** OVE flag set **\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* Check that an overflow alone causes a RANGE Exception. */
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/* Check that an overflow alone causes a RANGE Exception. */
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TEST_MULI (0x00020000, 0x4000,
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TEST_MULI (0x00020000, 0x4000,
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0x80000000, FALSE, TRUE)
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0x80000000, FALSE, TRUE)
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/* Check that a carry alone does not cause a RANGE Exception. */
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/* Check that a carry alone does not cause a RANGE Exception. */
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TEST_MULI (0xfffffffe, 0xfffd,
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TEST_MULI (0xfffffffe, 0xfffd,
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0x00000006, TRUE, FALSE)
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0x00000006, TRUE, FALSE)
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/* Check that carry and overflow together cause an exception. */
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/* Check that carry and overflow together cause an exception. */
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TEST_MULI (0xfffdfffe, 0x8000,
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TEST_MULI (0xfffdfffe, 0x8000,
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0x00010000, TRUE, TRUE)
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0x00010000, TRUE, TRUE)
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/* Finished checking range exceptions */
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/* Finished checking range exceptions */
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l.mfspr r3,r0,SPR_SR
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l.mfspr r3,r0,SPR_SR
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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l.and r3,r3,r2
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l.and r3,r3,r2
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l.mtspr r0,r3,SPR_SR
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l.mtspr r0,r3,SPR_SR
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* Test of multiply unsigned, l.mulu
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* Test of multiply unsigned, l.mulu
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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_mulu:
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_mulu:
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LOAD_STR (r3, "l.mulu\n")
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LOAD_STR (r3, "l.mulu\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* Multiply two small positive numbers. Should set no flags. */
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/* Multiply two small positive numbers. Should set no flags. */
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TEST_MUL (l.mulu, 0x00000002, 0x00000003,
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TEST_MUL (l.mulu, 0x00000002, 0x00000003,
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0x00000006, FALSE, FALSE)
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0x00000006, FALSE, FALSE)
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/* Multiply two quite large positive numbers. Should set no flags */
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/* Multiply two quite large positive numbers. Should set no flags */
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TEST_MUL (l.mulu, 0x00008001, 0x0000fffe,
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TEST_MUL (l.mulu, 0x00008001, 0x0000fffe,
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0x7ffffffe, FALSE, FALSE)
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0x7ffffffe, FALSE, FALSE)
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/* Multiply two slightly too large positive numbers. Should set the
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/* Multiply two slightly too large positive numbers. Should set the
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overflow, but not the carry flag */
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overflow, but not the carry flag */
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TEST_MUL (l.mulu, 0x00008000, 0x00010000,
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TEST_MUL (l.mulu, 0x00008000, 0x00010000,
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0x80000000, FALSE, FALSE)
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0x80000000, FALSE, FALSE)
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/* Multiply two large positive numbers. Should set both the carry and
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/* Multiply two large positive numbers. Should set both the carry and
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overflow flags (even though the result is not a negative number. */
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overflow flags (even though the result is not a negative number. */
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TEST_MUL (l.mulu, 0x00010000, 0x00010000,
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TEST_MUL (l.mulu, 0x00010000, 0x00010000,
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0x00000000, TRUE, FALSE)
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0x00000000, TRUE, FALSE)
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/* Multiply two small negative numbers. Should set the overflow, but not
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/* Multiply two small negative numbers. Should set the overflow, but not
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the carry flag. */
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the carry flag. */
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TEST_MUL (l.mulu, 0xfffffffe, 0xfffffffd,
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TEST_MUL (l.mulu, 0xfffffffe, 0xfffffffd,
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0x00000006, TRUE, FALSE)
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0x00000006, TRUE, FALSE)
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/* Multiply two quite large negative numbers. Should set the overflow,
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/* Multiply two quite large negative numbers. Should set the overflow,
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but not the carry flag. */
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but not the carry flag. */
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0002,
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0002,
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0x7ffffffe, TRUE, FALSE)
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0x7ffffffe, TRUE, FALSE)
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/* Multiply two slightly too large negative numbers. Should set both the
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/* Multiply two slightly too large negative numbers. Should set both the
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overflow, and the carry flags */
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overflow, and the carry flags */
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,
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0x80010000, TRUE, FALSE)
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0x80010000, TRUE, FALSE)
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/* Multiply two large negative numbers. Should set the
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/* Multiply two large negative numbers. Should set the
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both the carry and overflow flags (even though the result is a
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both the carry and overflow flags (even though the result is a
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positive number. */
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positive number. */
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TEST_MUL (l.mulu, 0xffff0000, 0xfffeffff,
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TEST_MUL (l.mulu, 0xffff0000, 0xfffeffff,
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0x00010000, TRUE, FALSE)
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0x00010000, TRUE, FALSE)
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/* Multiply one small negative number and one small positive number.
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/* Multiply one small negative number and one small positive number.
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Should set the overflow, but not the carry flag. */
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Should set the overflow, but not the carry flag. */
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TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,
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TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,
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0xfffffffa, TRUE, FALSE)
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0xfffffffa, TRUE, FALSE)
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/* Multiply one quite large negative number and one quite large
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/* Multiply one quite large negative number and one quite large
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positive number. Should set the overflow, but not the carry flag. */
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positive number. Should set the overflow, but not the carry flag. */
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TEST_MUL (l.mulu, 0xffff8000, 0x00010000,
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TEST_MUL (l.mulu, 0xffff8000, 0x00010000,
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0x80000000, TRUE, FALSE)
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0x80000000, TRUE, FALSE)
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/* Multiply one slightly too large negative number and one slightly
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/* Multiply one slightly too large negative number and one slightly
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too large positive number. Should set both the carry and overflow
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too large positive number. Should set both the carry and overflow
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flags. */
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flags. */
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TEST_MUL (l.mulu, 0xffff7fff, 0x00010000,
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TEST_MUL (l.mulu, 0xffff7fff, 0x00010000,
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0x7fff0000, TRUE, FALSE)
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0x7fff0000, TRUE, FALSE)
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/* Multiply the largest negative number by positive unity. Should set
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/* Multiply the largest negative number by positive unity. Should set
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neither carry, nor overflow flag. */
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neither carry, nor overflow flag. */
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TEST_MUL (l.mulu, 0x80000000, 0x00000001,
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TEST_MUL (l.mulu, 0x80000000, 0x00000001,
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0x80000000, FALSE, FALSE)
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0x80000000, FALSE, FALSE)
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/* Check that range exceptions are never triggered */
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/* Check that range exceptions are never triggered */
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l.mfspr r3,r0,SPR_SR
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l.mfspr r3,r0,SPR_SR
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LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
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LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */
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l.or r3,r3,r2
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l.or r3,r3,r2
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l.mtspr r0,r3,SPR_SR
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l.mtspr r0,r3,SPR_SR
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LOAD_STR (r3, " ** OVE flag set **\n")
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LOAD_STR (r3, " ** OVE flag set **\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* Check that what would cause an overflow alone in 2's complement does
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/* Check that what would cause an overflow alone in 2's complement does
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not cause a RANGE Exception. */
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not cause a RANGE Exception. */
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TEST_MUL (l.mulu, 0x00008000, 0x00010000,
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TEST_MUL (l.mulu, 0x00008000, 0x00010000,
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0x80000000, FALSE, FALSE)
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0x80000000, FALSE, FALSE)
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/* Check that a carry alone does not cause a RANGE Exception. */
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/* Check that a carry alone does not cause a RANGE Exception. */
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TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,
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TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,
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0xfffffffa, TRUE, FALSE)
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0xfffffffa, TRUE, FALSE)
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/* Check that what would cause an overflow and carry in 2's complement
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/* Check that what would cause an overflow and carry in 2's complement
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does not cause a RANGE Exception. */
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does not cause a RANGE Exception. */
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,
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TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,
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0x80010000, TRUE, FALSE)
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0x80010000, TRUE, FALSE)
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/* Finished checking range exceptions */
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/* Finished checking range exceptions */
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l.mfspr r3,r0,SPR_SR
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l.mfspr r3,r0,SPR_SR
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */
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l.and r3,r3,r2
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l.and r3,r3,r2
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l.mtspr r0,r3,SPR_SR
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l.mtspr r0,r3,SPR_SR
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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LOAD_STR (r3, " ** OVE flag cleared **\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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* All done
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* All done
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* ------------------------------------------------------------------------- */
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* ------------------------------------------------------------------------- */
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_exit:
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_exit:
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LOAD_STR (r3, "Test completed\n")
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LOAD_STR (r3, "Test completed\n")
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l.jal _puts
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l.jal _puts
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l.nop
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l.nop
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TEST_EXIT
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TEST_EXIT
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