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

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[/] [openrisc/] [trunk/] [or1ksim/] [testsuite/] [test-code-or1k/] [inst-set-test/] [is-mul-test.S] - Blame information for rev 778

Line No.	Rev	Author	Line
1	118	jeremybenn	`/* is-mul-test.S. l.mul, l.muli and l.mulu instruction test of Or1ksim`
2			`*`
3			`* Copyright (C) 1999-2006 OpenCores`
4			`* Copyright (C) 2010 Embecosm Limited`
5			`*`
6			`* Contributors various OpenCores participants`
7			`* Contributor Jeremy Bennett`
8			`*`
9			`* This file is part of OpenRISC 1000 Architectural Simulator.`
10			`*`
11			`* This program is free software; you can redistribute it and/or modify it`
12			`* under the terms of the GNU General Public License as published by the Free`
13			`* Software Foundation; either version 3 of the License, or (at your option)`
14			`* any later version.`
15			`*`
16			`* This program is distributed in the hope that it will be useful, but WITHOUT`
17			`* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or`
18			`* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for`
19			`* more details.`
20			`*`
21			`* You should have received a copy of the GNU General Public License along`
22			`* with this program. If not, see .`
23			`*/`
24
25			`/* ----------------------------------------------------------------------------`
26			`* Coding conventions are described in inst-set-test.S`
27			`* ------------------------------------------------------------------------- */`
28
29			`/* ----------------------------------------------------------------------------`
30			`* Test coverage`
31			`*`
32			`* The l.mul, l.muli and l.mulu instructions should all be present and set the`
33			`* carry and overflow flags.`
34			`*`
35			`* Problems in this area were reported in Bugs 1774, 1782, 1783 and 1784.`
36			`* Having fixed the problem, this is (in good software engineering style), a`
37			`* regression test to go with the fix.`
38			`*`
39			`* This is not a comprehensive test of any instruction (yet).`
40			`*`
41			`* Of course what is really needed is a comprehensive instruction test...`
42			`* ------------------------------------------------------------------------- */`
43
44
45			`#include "inst-set-test.h"`
46
47			`/* ----------------------------------------------------------------------------`
48			`* A macro to carry out a test of multiply signed or unsigned`
49			`*`
50			`* Arguments`
51			`* opc: The opcode`
52			`* op1: First operand value`
53			`* op2: Second operand value`
54			`* res: Expected result`
55			`* cy: Expected carry flag`
56			`* ov: Expected overflow flag`
57			`* ------------------------------------------------------------------------- */`
58			`#define TEST_MUL(opc, op1, op2, res, cy, ov) \`
59			`l.mfspr r3,r0,SPR_SR ;\`
60			`LOAD_CONST (r2, ~(SPR_SR_CY \| SPR_SR_OV)) ;\`
61			`l.and r3,r3,r2 /* Clear flags */ ;\`
62			`l.mtspr r0,r3,SPR_SR ;\`
63			`;\`
64			`LOAD_CONST (r5,op1) /* Load numbers to add */ ;\`
65			`LOAD_CONST (r6,op2) ;\`
66			`l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\`
67			`50: opc r4,r5,r6 ;\`
68			`l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\`
69			`l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\`
70			`PUSH (r5) /* Save EPCR for later */ ;\`
71			`PUSH (r2) /* Save SR for later */ ;\`
72			`PUSH (r4) /* Save result for later */ ;\`
73			`;\`
74			`PUTS (" 0x") ;\`
75			`PUTH (op1) ;\`
76			`PUTS (" * 0x") ;\`
77			`PUTH (op2) ;\`
78			`PUTS (" = 0x") ;\`
79			`PUTH (res) ;\`
80			`PUTS (": ") ;\`
81			`POP (r4) ;\`
82			`CHECK_RES1 (r4, res) ;\`
83			`;\`
84			`POP (r2) /* Retrieve SR */ ;\`
85			`PUSH (r2) ;\`
86			`LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\`
87			`l.and r2,r2,r4 ;\`
88			`l.sfeq r2,r4 ;\`
89			`CHECK_FLAG ("- carry flag set: ", cy) ;\`
90			`;\`
91			`POP (r2) /* Retrieve SR */ ;\`
92			`LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\`
93			`l.and r2,r2,r4 ;\`
94			`l.sfeq r2,r4 ;\`
95			`CHECK_FLAG ("- overflow flag set: ", ov) ;\`
96			`;\`
97			`POP (r2) /* Retrieve EPCR */ ;\`
98			`LOAD_CONST (r4, 50b) /* The opcode of interest */ ;\`
99			`l.and r2,r2,r4 ;\`
100			`l.sfeq r2,r4 ;\`
101			`l.bnf 51f ;\`
102			`;\`
103			`PUTS (" - exception triggered: TRUE\n") ;\`
104			`l.j 52f ;\`
105			`l.nop ;\`
106			`;\`
107			`51: PUTS (" - exception triggered: FALSE\n") ;\`
108			`52:`
109
110
111			`/* ----------------------------------------------------------------------------`
112			`* A macro to carry out a test of multiply immediate`
113			`*`
114			`* Arguments`
115			`* op1: First operand value`
116			`* op2: Second operand value`
117			`* res: Expected result`
118			`* cy: Expected carry flag`
119			`* ov: Expected overflow flag`
120			`* ------------------------------------------------------------------------- */`
121			`#define TEST_MULI(op1, op2, res, cy, ov) \`
122			`l.mfspr r3,r0,SPR_SR ;\`
123			`LOAD_CONST (r2, ~(SPR_SR_CY \| SPR_SR_OV)) ;\`
124			`l.and r3,r3,r2 /* Clear flags */ ;\`
125			`l.mtspr r0,r3,SPR_SR ;\`
126			`;\`
127			`LOAD_CONST (r5,op1) /* Load numbers to add */ ;\`
128			`l.mtspr r0,r0,SPR_EPCR_BASE /* Clear record */ ;\`
129			`53: l.muli r4,r5,op2 ;\`
130			`l.mfspr r2,r0,SPR_SR /* So we can examine flags */ ;\`
131			`l.mfspr r5,r0,SPR_EPCR_BASE /* What triggered exception */ ;\`
132			`PUSH (r5) /* Save EPCR for later */ ;\`
133			`PUSH (r2) /* Save SR for later */ ;\`
134			`PUSH (r4) /* Save result for later */ ;\`
135			`;\`
136			`PUTS (" 0x") ;\`
137			`PUTH (op1) ;\`
138			`PUTS (" * 0x") ;\`
139			`PUTHH (op2) ;\`
140			`PUTS (" = 0x") ;\`
141			`PUTH (res) ;\`
142			`PUTS (": ") ;\`
143			`POP (r4) ;\`
144			`CHECK_RES1 (r4, res) ;\`
145			`;\`
146			`POP(r2) /* Retrieve SR */ ;\`
147			`PUSH(r2) ;\`
148			`LOAD_CONST (r4, SPR_SR_CY) /* The carry bit */ ;\`
149			`l.and r2,r2,r4 ;\`
150			`l.sfeq r2,r4 ;\`
151			`CHECK_FLAG ("- carry flag set: ", cy) ;\`
152			`;\`
153			`POP(r2) /* Retrieve SR */ ;\`
154			`LOAD_CONST (r4, SPR_SR_OV) /* The overflow bit */ ;\`
155			`l.and r2,r2,r4 ;\`
156			`l.sfeq r2,r4 ;\`
157			`CHECK_FLAG ("- overflow flag set: ", ov) ;\`
158			`;\`
159			`POP (r2) /* Retrieve EPCR */ ;\`
160			`LOAD_CONST (r4, 53b) /* The opcode of interest */ ;\`
161			`l.and r2,r2,r4 ;\`
162			`l.sfeq r2,r4 ;\`
163			`l.bnf 54f ;\`
164			`;\`
165			`PUTS (" - exception triggered: TRUE\n") ;\`
166			`l.j 55f ;\`
167			`l.nop ;\`
168			`;\`
169			`54: PUTS (" - exception triggered: FALSE\n") ;\`
170			`55:`
171
172
173			`/* ----------------------------------------------------------------------------`
174			`* Start of code`
175			`* ------------------------------------------------------------------------- */`
176			`.section .text`
177			`.global _start`
178			`_start:`
179			`l.mfspr r3,r0,SPR_SR`
180			`LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */`
181			`l.and r3,r3,r2`
182			`l.mtspr r0,r3,SPR_SR`
183
184			`LOAD_STR (r3, " OVE flag cleared \n")`
185			`l.jal _puts`
186			`l.nop`
187
188			`/* ----------------------------------------------------------------------------`
189			`* Test of multiply signed, l.mul`
190			`* ------------------------------------------------------------------------- */`
191			`_mul:`
192			`LOAD_STR (r3, "l.mul\n")`
193			`l.jal _puts`
194			`l.nop`
195
196			`/* Multiply two small positive numbers. Should set no flags. */`
197			`TEST_MUL (l.mul, 0x00000002, 0x00000003,`
198			`0x00000006, FALSE, FALSE)`
199
200			`/* Multiply two quite large positive numbers. Should set no flags */`
201			`TEST_MUL (l.mul, 0x00008001, 0x0000fffe,`
202			`0x7ffffffe, FALSE, FALSE)`
203
204			`/* Multiply two slightly too large positive numbers. Should set the`
205			`overflow, but not the carry flag */`
206			`TEST_MUL (l.mul, 0x00008000, 0x00010000,`
207			`0x80000000, FALSE, TRUE)`
208
209			`/* Multiply two large positive numbers. Should set both the carry and`
210			`overflow flags (even though the result is not a negative number. */`
211			`TEST_MUL (l.mul, 0x00010000, 0x00010000, 0x00000000, TRUE, TRUE)`
212
213			`/* Multiply two small negative numbers. Should set the overflow, but not`
214			`the carry flag. */`
215			`TEST_MUL (l.mul, 0xfffffffe, 0xfffffffd,`
216			`0x00000006, TRUE, FALSE)`
217
218			`/* Multiply two quite large negative numbers. Should set the overflow,`
219			`but not the carry flag. */`
220			`TEST_MUL (l.mul, 0xffff7fff, 0xffff0002,`
221			`0x7ffffffe, TRUE, FALSE)`
222
223			`/* Multiply two slightly too large negative numbers. Should set both the`
224			`overflow, and the carry flags */`
225			`TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,`
226			`0x80010000, TRUE, TRUE)`
227
228			`/* Multiply two large negative numbers. Should set the`
229			`both the carry and overflow flags (even though the result is a`
230			`positive number. */`
231			`TEST_MUL (l.mul, 0xffff0000, 0xfffeffff,`
232			`0x00010000, TRUE, TRUE)`
233
234			`/* Multiply one small negative number and one small positive number.`
235			`Should set the overflow, but not the carry flag. */`
236			`TEST_MUL (l.mul, 0x00000002, 0xfffffffd,`
237			`0xfffffffa, TRUE, FALSE)`
238
239			`/* Multiply one quite large negative number and one quite large`
240			`positive number. Should set the overflow, but not the carry flag. */`
241			`TEST_MUL (l.mul, 0xffff8000, 0x00010000,`
242			`0x80000000, TRUE, FALSE)`
243
244			`/* Multiply one slightly too large negative number and one slightly`
245			`too large positive number. Should set both the carry and overflow`
246			`flags. */`
247			`TEST_MUL (l.mul, 0xffff7fff, 0x00010000,`
248			`0x7fff0000, TRUE, TRUE)`
249
250			`/* Multiply the largest negative number by positive unity. Should set`
251			`neither carry, nor overflow flag. */`
252			`TEST_MUL (l.mul, 0x80000000, 0x00000001,`
253			`0x80000000, FALSE, FALSE)`
254
255			`/* Check that range exceptions are triggered */`
256			`l.mfspr r3,r0,SPR_SR`
257			`LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */`
258			`l.or r3,r3,r2`
259			`l.mtspr r0,r3,SPR_SR`
260
261			`LOAD_STR (r3, " OVE flag set \n")`
262			`l.jal _puts`
263			`l.nop`
264
265			`/* Check that an overflow alone causes a RANGE Exception. */`
266			`TEST_MUL (l.mul, 0x00008000, 0x00010000,`
267			`0x80000000, FALSE, TRUE)`
268
269			`/* Check that a carry alone does not cause a RANGE Exception. */`
270			`TEST_MUL (l.mul, 0x00000002, 0xfffffffd,`
271			`0xfffffffa, TRUE, FALSE)`
272
273			`/* Check that carry and overflow together cause an exception. */`
274			`TEST_MUL (l.mul, 0xffff7fff, 0xffff0000,`
275			`0x80010000, TRUE, TRUE)`
276
277			`/* Finished checking range exceptions */`
278			`l.mfspr r3,r0,SPR_SR`
279			`LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */`
280			`l.and r3,r3,r2`
281			`l.mtspr r0,r3,SPR_SR`
282
283			`LOAD_STR (r3, " OVE flag cleared \n")`
284			`l.jal _puts`
285			`l.nop`
286
287			`/* ----------------------------------------------------------------------------`
288			`* Test of multiply signed, l.muli`
289			`* ------------------------------------------------------------------------- */`
290			`_muli:`
291			`LOAD_STR (r3, "l.muli\n")`
292			`l.jal _puts`
293			`l.nop`
294
295			`/* Multiply two small positive numbers. Should set no flags. */`
296			`TEST_MULI (0x00000002, 0x0003,`
297			`0x00000006, FALSE, FALSE)`
298
299			`/* Multiply two quite large positive numbers. Should set no flags */`
300			`TEST_MULI (0x00010002, 0x7fff,`
301			`0x7ffffffe, FALSE, FALSE)`
302
303			`/* Multiply two slightly too large positive numbers. Should set the`
304			`overflow, but not the carry flag */`
305			`TEST_MULI (0x00020000, 0x4000,`
306			`0x80000000, FALSE, TRUE)`
307
308			`/* Multiply two large positive numbers. Should set both the carry and`
309			`overflow flags (even though the result is not a negative number. */`
310			`TEST_MULI (0x00040000, 0x4000,`
311			`0x00000000, TRUE, TRUE)`
312
313			`/* Multiply two small negative numbers. Should set the overflow, but not`
314			`the carry flag. */`
315			`TEST_MULI (0xfffffffe, 0xfffd,`
316			`0x00000006, TRUE, FALSE)`
317
318			`/* Multiply two quite large negative numbers. Should set the overflow,`
319			`but not the carry flag. */`
320			`TEST_MULI (0xfffefffe, 0x8001,`
321			`0x7ffffffe, TRUE, FALSE)`
322
323			`/* Multiply two slightly too large negative numbers. Should set both the`
324			`overflow, and the carry flags */`
325			`TEST_MULI (0xfffe0000, 0xbfff,`
326			`0x80020000, TRUE, TRUE)`
327
328			`/* Multiply two large negative numbers. Should set the`
329			`both the carry and overflow flags (even though the result is a`
330			`positive number. */`
331			`TEST_MULI (0xfffdfffe, 0x8000,`
332			`0x00010000, TRUE, TRUE)`
333
334			`/* Multiply one small negative number and one small positive number.`
335			`Should set the overflow, but not the carry flag. */`
336			`TEST_MULI (0x00000002, 0xfffd,`
337			`0xfffffffa, TRUE, FALSE)`
338
339			`/* Multiply one quite large negative number and one quite large`
340			`positive number. Should set the overflow, but not the carry flag. */`
341			`TEST_MULI (0x00010000, 0x8000,`
342			`0x80000000, TRUE, FALSE)`
343
344			`/* Multiply one slightly too large negative number and one slightly`
345			`too large positive number. Should set both the carry and overflow`
346			`flags. */`
347			`TEST_MULI (0xfffdfffc, 0x4000,`
348			`0x7fff0000, TRUE, TRUE)`
349
350			`/* Multiply the largest negative number by positive unity. Should set`
351			`neither carry, nor overflow flag. */`
352			`TEST_MULI (0x80000000, 0x0001,`
353			`0x80000000, FALSE, FALSE)`
354
355			`/* Check that range exceptions are triggered */`
356			`l.mfspr r3,r0,SPR_SR`
357			`LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */`
358			`l.or r3,r3,r2`
359			`l.mtspr r0,r3,SPR_SR`
360
361			`LOAD_STR (r3, " OVE flag set \n")`
362			`l.jal _puts`
363			`l.nop`
364
365			`/* Check that an overflow alone causes a RANGE Exception. */`
366			`TEST_MULI (0x00020000, 0x4000,`
367			`0x80000000, FALSE, TRUE)`
368
369			`/* Check that a carry alone does not cause a RANGE Exception. */`
370			`TEST_MULI (0xfffffffe, 0xfffd,`
371			`0x00000006, TRUE, FALSE)`
372
373			`/* Check that carry and overflow together cause an exception. */`
374			`TEST_MULI (0xfffdfffe, 0x8000,`
375			`0x00010000, TRUE, TRUE)`
376
377			`/* Finished checking range exceptions */`
378			`l.mfspr r3,r0,SPR_SR`
379			`LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */`
380			`l.and r3,r3,r2`
381			`l.mtspr r0,r3,SPR_SR`
382
383			`LOAD_STR (r3, " OVE flag cleared \n")`
384			`l.jal _puts`
385			`l.nop`
386
387			`/* ----------------------------------------------------------------------------`
388			`* Test of multiply unsigned, l.mulu`
389			`* ------------------------------------------------------------------------- */`
390			`_mulu:`
391			`LOAD_STR (r3, "l.mulu\n")`
392			`l.jal _puts`
393			`l.nop`
394
395			`/* Multiply two small positive numbers. Should set no flags. */`
396			`TEST_MUL (l.mulu, 0x00000002, 0x00000003,`
397			`0x00000006, FALSE, FALSE)`
398
399			`/* Multiply two quite large positive numbers. Should set no flags */`
400			`TEST_MUL (l.mulu, 0x00008001, 0x0000fffe,`
401			`0x7ffffffe, FALSE, FALSE)`
402
403			`/* Multiply two slightly too large positive numbers. Should set the`
404			`overflow, but not the carry flag */`
405			`TEST_MUL (l.mulu, 0x00008000, 0x00010000,`
406			`0x80000000, FALSE, FALSE)`
407
408			`/* Multiply two large positive numbers. Should set both the carry and`
409			`overflow flags (even though the result is not a negative number. */`
410			`TEST_MUL (l.mulu, 0x00010000, 0x00010000,`
411			`0x00000000, TRUE, FALSE)`
412
413			`/* Multiply two small negative numbers. Should set the overflow, but not`
414			`the carry flag. */`
415			`TEST_MUL (l.mulu, 0xfffffffe, 0xfffffffd,`
416			`0x00000006, TRUE, FALSE)`
417
418			`/* Multiply two quite large negative numbers. Should set the overflow,`
419			`but not the carry flag. */`
420			`TEST_MUL (l.mulu, 0xffff7fff, 0xffff0002,`
421			`0x7ffffffe, TRUE, FALSE)`
422
423			`/* Multiply two slightly too large negative numbers. Should set both the`
424			`overflow, and the carry flags */`
425			`TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,`
426			`0x80010000, TRUE, FALSE)`
427
428			`/* Multiply two large negative numbers. Should set the`
429			`both the carry and overflow flags (even though the result is a`
430			`positive number. */`
431			`TEST_MUL (l.mulu, 0xffff0000, 0xfffeffff,`
432			`0x00010000, TRUE, FALSE)`
433
434			`/* Multiply one small negative number and one small positive number.`
435			`Should set the overflow, but not the carry flag. */`
436			`TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,`
437			`0xfffffffa, TRUE, FALSE)`
438
439			`/* Multiply one quite large negative number and one quite large`
440			`positive number. Should set the overflow, but not the carry flag. */`
441			`TEST_MUL (l.mulu, 0xffff8000, 0x00010000,`
442			`0x80000000, TRUE, FALSE)`
443
444			`/* Multiply one slightly too large negative number and one slightly`
445			`too large positive number. Should set both the carry and overflow`
446			`flags. */`
447			`TEST_MUL (l.mulu, 0xffff7fff, 0x00010000,`
448			`0x7fff0000, TRUE, FALSE)`
449
450			`/* Multiply the largest negative number by positive unity. Should set`
451			`neither carry, nor overflow flag. */`
452			`TEST_MUL (l.mulu, 0x80000000, 0x00000001,`
453			`0x80000000, FALSE, FALSE)`
454
455			`/* Check that range exceptions are never triggered */`
456			`l.mfspr r3,r0,SPR_SR`
457			`LOAD_CONST (r2, SPR_SR_OVE) /* Set OVE */`
458			`l.or r3,r3,r2`
459			`l.mtspr r0,r3,SPR_SR`
460
461			`LOAD_STR (r3, " OVE flag set \n")`
462			`l.jal _puts`
463			`l.nop`
464
465			`/* Check that what would cause an overflow alone in 2's complement does`
466			`not cause a RANGE Exception. */`
467			`TEST_MUL (l.mulu, 0x00008000, 0x00010000,`
468			`0x80000000, FALSE, FALSE)`
469
470			`/* Check that a carry alone does not cause a RANGE Exception. */`
471			`TEST_MUL (l.mulu, 0x00000002, 0xfffffffd,`
472			`0xfffffffa, TRUE, FALSE)`
473
474			`/* Check that what would cause an overflow and carry in 2's complement`
475			`does not cause a RANGE Exception. */`
476			`TEST_MUL (l.mulu, 0xffff7fff, 0xffff0000,`
477			`0x80010000, TRUE, FALSE)`
478
479			`/* Finished checking range exceptions */`
480			`l.mfspr r3,r0,SPR_SR`
481			`LOAD_CONST (r2, ~SPR_SR_OVE) /* Clear OVE */`
482			`l.and r3,r3,r2`
483			`l.mtspr r0,r3,SPR_SR`
484
485			`LOAD_STR (r3, " OVE flag cleared \n")`
486			`l.jal _puts`
487			`l.nop`
488
489			`/* ----------------------------------------------------------------------------`
490			`* All done`
491			`* ------------------------------------------------------------------------- */`
492			`_exit:`
493			`LOAD_STR (r3, "Test completed\n")`
494			`l.jal _puts`
495			`l.nop`
496
497			`TEST_EXIT`