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[/] [openrisc/] [trunk/] [or1ksim/] [testsuite/] [test-code-or1k/] [inst-set-test/] [is-shift-test.S] - Rev 532

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/* is-shift-test.S. shift instructions test of Or1ksim
 * 
 * Copyright (C) 1999-2006 OpenCores
 * Copyright (C) 2010 Embecosm Limited
 * 
 * Contributors various OpenCores participants
 * Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
 * 
 * This file is part of OpenRISC 1000 Architectural Simulator.
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http:  www.gnu.org/licenses/>.
 */

/* ----------------------------------------------------------------------------
 * Coding conventions are described in inst-set-test.S
 * ------------------------------------------------------------------------- */

/* ----------------------------------------------------------------------------
 * Test coverage
 *
 * The shift instructions should never set the carry and overflow flags.
 *
 * Problems in this area were reported in Bugs 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 shift in registers
 *
 * This opcode should never set the flags.
 *
 * Arguments
 *   opc:       The operand
 *   op1:       First operand value
 *   op2:       Second operand value
 *   res:       The expected result
 * ------------------------------------------------------------------------- */
#define TEST_SHIFT(opc, op1, op2, res)                                   \
        l.mfspr r3,r0,SPR_SR            /* Clear flags */               ;\
        LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV))                       ;\
        l.and   r3,r3,r2                                                ;\
        l.mtspr r0,r3,SPR_SR                                            ;\
                                                                        ;\
        LOAD_CONST (r5,op1)             /* Load operands */             ;\
        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 (" shifted by 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:      ", FALSE)                   ;\
                                                                        ;\
        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:   ", FALSE)                   ;\
                                                                        ;\
        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 shift with an immediate operand
 *
 * This opcode should never set the flags.
 *
 * Arguments
 *   opc:       The operand
 *   op1:       First operand value
 *   op2:       Second operand value
 *   res:       The expected result
 * ------------------------------------------------------------------------- */
#define TEST_SHIFTI(opc, op1, op2, res)                                  \
        l.mfspr r3,r0,SPR_SR            /* Clear flags */               ;\
        LOAD_CONST (r2, ~(SPR_SR_CY | SPR_SR_OV))                       ;\
        l.and   r3,r3,r2                                                ;\
        l.mtspr r0,r3,SPR_SR                                            ;\
                                                                        ;\
        LOAD_CONST (r5,op1)             /* Load operands */             ;\
        l.mtspr r0,r0,SPR_EPCR_BASE     /* Clear record */              ;\
53:     opc     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 (" shifted by 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:      ", FALSE)                   ;\
                                                                        ;\
        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:   ", FALSE)                   ;\
                                                                        ;\
        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:
        /* Always set OVE. We should never trigger an exception, even if this
           bit is set. */
        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

/* ----------------------------------------------------------------------------
 * Test of shift left logical, l.sll
 * ------------------------------------------------------------------------- */
_sll:
        LOAD_STR (r3, "l.sll\n")
        l.jal   _puts
        l.nop

        /* Shift left by zero. */
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00000000, 0xb38f0f83)

        /* Shift left by amounts in the 1-31 range */
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00000001, 0x671e1f06)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00000004, 0x38f0f830)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00000010, 0x0f830000)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x0000001f, 0x80000000)

        /* Shift left by larger amounts - should be masked. */
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00000021, 0x671e1f06)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00002224, 0x38f0f830)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0x00f789f0, 0x0f830000)
        TEST_SHIFT (l.sll, 0xb38f0f83, 0xffffffff, 0x80000000)

/* ----------------------------------------------------------------------------
 * Test of shift left logical with immediate, l.slli
 * ------------------------------------------------------------------------- */
_slli:
        LOAD_STR (r3, "l.slli\n")
        l.jal   _puts
        l.nop

        /* Shift left by zero. */
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0000, 0xb38f0f83)

        /* Shift left by amounts in the 1-31 range */
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0001, 0x671e1f06)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0004, 0x38f0f830)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0010, 0x0f830000)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x001f, 0x80000000)

        /* Shift left by larger amounts - should be masked. */
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0021, 0x671e1f06)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0024, 0x38f0f830)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x0030, 0x0f830000)
        TEST_SHIFTI (l.slli, 0xb38f0f83, 0x003f, 0x80000000)

/* ----------------------------------------------------------------------------
 * Test of shift right arithmetic, l.sra
 * ------------------------------------------------------------------------- */
_sra:
        LOAD_STR (r3, "l.sra\n")
        l.jal   _puts
        l.nop

        /* Shift right by zero. */
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00000000, 0xb38f0f83)

        /* Shift right by amounts in the 1-31 range */
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00000001, 0xd9c787c1)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00000004, 0xfb38f0f8)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00000010, 0xffffb38f)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x0000001f, 0xffffffff)

        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00000001, 0x2638783e)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00000004, 0x04c70f07)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00000010, 0x00004c70)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0x0000001f, 0x00000000)

        /* Shift right by larger amounts - should be masked. */
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00000021, 0xd9c787c1)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00002224, 0xfb38f0f8)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0x00f789f0, 0xffffb38f)
        TEST_SHIFT (l.sra, 0xb38f0f83, 0xffffffff, 0xffffffff)

        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00000021, 0x2638783e)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00002224, 0x04c70f07)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0x00f789f0, 0x00004c70)
        TEST_SHIFT (l.sra, 0x4c70f07c, 0xffffffff, 0x00000000)


/* ----------------------------------------------------------------------------
 * Test of shift right arithmetic with immediate, l.srai
 * ------------------------------------------------------------------------- */
_srai:
        LOAD_STR (r3, "l.srai\n")
        l.jal   _puts
        l.nop

        /* Shift right by zero. */
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0000, 0xb38f0f83)

        /* Shift right by amounts in the 1-31 range */
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0001, 0xd9c787c1)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0004, 0xfb38f0f8)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0010, 0xffffb38f)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x001f, 0xffffffff)

        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0001, 0x2638783e)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0004, 0x04c70f07)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0010, 0x00004c70)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x001f, 0x00000000)

        /* Shift right by larger amounts - should be masked. */
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0021, 0xd9c787c1)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0024, 0xfb38f0f8)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x0030, 0xffffb38f)
        TEST_SHIFTI (l.srai, 0xb38f0f83, 0x003f, 0xffffffff)

        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0021, 0x2638783e)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0024, 0x04c70f07)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x0030, 0x00004c70)
        TEST_SHIFTI (l.srai, 0x4c70f07c, 0x003f, 0x00000000)

/* ----------------------------------------------------------------------------
 * Test of shift right logical, l.srl
 * ------------------------------------------------------------------------- */
_srl:
        LOAD_STR (r3, "l.srl\n")
        l.jal   _puts
        l.nop

        /* Shift right by zero. */
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00000000, 0xb38f0f83)

        /* Shift right by amounts in the 1-31 range */
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00000001, 0x59c787c1)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00000004, 0x0b38f0f8)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00000010, 0x0000b38f)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x0000001f, 0x00000001)

        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00000001, 0x2638783e)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00000004, 0x04c70f07)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00000010, 0x00004c70)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0x0000001f, 0x00000000)

        /* Shift right by larger amounts - should be masked. */
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00000021, 0x59c787c1)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00002224, 0x0b38f0f8)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0x00f789f0, 0x0000b38f)
        TEST_SHIFT (l.srl, 0xb38f0f83, 0xffffffff, 0x00000001)

        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00000021, 0x2638783e)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00002224, 0x04c70f07)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0x00f789f0, 0x00004c70)
        TEST_SHIFT (l.srl, 0x4c70f07c, 0xffffffff, 0x00000000)


/* ----------------------------------------------------------------------------
 * Test of shift right logical with immediate, l.srli
 * ------------------------------------------------------------------------- */
_srli:
        LOAD_STR (r3, "l.srli\n")
        l.jal   _puts
        l.nop

        /* Shift right by zero. */
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0000, 0xb38f0f83)

        /* Shift right by amounts in the 1-31 range */
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0001, 0x59c787c1)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0004, 0x0b38f0f8)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0010, 0x0000b38f)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x001f, 0x00000001)

        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0001, 0x2638783e)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0004, 0x04c70f07)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0010, 0x00004c70)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x001f, 0x00000000)

        /* Shift right by larger amounts - should be masked. */
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0021, 0x59c787c1)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0024, 0x0b38f0f8)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x0030, 0x0000b38f)
        TEST_SHIFTI (l.srli, 0xb38f0f83, 0x003f, 0x00000001)

        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0021, 0x2638783e)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0024, 0x04c70f07)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x0030, 0x00004c70)
        TEST_SHIFTI (l.srli, 0x4c70f07c, 0x003f, 0x00000000)

/* ----------------------------------------------------------------------------
 * All done
 * ------------------------------------------------------------------------- */
_exit:
        LOAD_STR (r3, "Test completed\n")
        l.jal   _puts
        l.nop

        TEST_EXIT

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