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/* Tests instruction l.sub.
Copyright (C) 2017-2024 Free Software Foundation, Inc.
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/>. */
# mach: or1k
# output: report(0x00000003);\n
# output: report(0x00000002);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x00000001);\n
# output: report(0x00000002);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x00000003);\n
# output: report(0x00000002);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0xfffffffd);\n
# output: report(0xfffffffe);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0xffffffff);\n
# output: report(0xfffffffe);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x7fffffff);\n
# output: report(0x3fffffff);\n
# output: report(0x40000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x40000000);\n
# output: report(0x40000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x3fffffff);\n
# output: report(0x40000000);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x40000000);\n
# output: report(0x3fffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x80000000);\n
# output: report(0x7fffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x7fffffff);\n
# output: report(0x80000000);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x80000000);\n
# output: report(0x7fffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000001);\n
# output: report(0x00000001);\n
# output: \n
# output: report(0x3fffffff);\n
# output: report(0x40000000);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000000);\n
# output: report(0x00000000);\n
# output: \n
# output: report(0x7fffffff);\n
# output: report(0x80000000);\n
# output: report(0xffffffff);\n
# output: report(0x00000001);\n
# output: report(0x00000001);\n
# output: report(0x00000001);\n
# output: \n
# output: exit(0)\n
#include "or1k-asm-test-helpers.h"
STANDARD_TEST_ENVIRONMENT
.section .exception_vectors
/* Range exception. */
.org 0xb00
/* The handling is a bit dubious at present. We just patch the
instruction with l.nop and restart. This will go wrong in branch
delay slots. But we don't have those in this test. */
l.addi r1, r1, -EXCEPTION_STACK_SKIP_SIZE
PUSH r2
PUSH r3
/* Save the address of the instruction that caused the problem. */
MOVE_FROM_SPR r2, SPR_EPCR_BASE
LOAD_IMMEDIATE r3, 0x15000000 /* Opcode for l.nop */
l.sw 0(r2), r3
POP r3
POP r2
l.addi r1, r1, EXCEPTION_STACK_SKIP_SIZE
l.rfe
.section .text
start_tests:
PUSH LINK_REGISTER_R9
/* Test l.sub */
/* Subtract two small positive numbers. Sets the carry, but never
the overflow if the result is negative. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x00000003, \
0x00000002
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x00000001, \
0x00000002
/* Check carry in is ignored. */
TEST_INST_FF_I32_I32 SPR_SR_CY, SPR_SR_OV, l.sub, 0x00000003, 0x00000002
/* Subtract two small negative numbers. Sets the carry flag if
the result is negative, but never the overflow flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0xfffffffd, \
0xfffffffe
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0xffffffff, \
0xfffffffe
/* Subtract two quite large positive numbers. Should set neither
the overflow nor the carry flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x7fffffff, \
0x3fffffff
/* Subtract two quite large negative numbers. Should set neither
the overflow nor the carry flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x40000000, \
0x40000000
/* Subtract two large positive numbers with a negative result.
Should set the carry, but not the overflow flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x3fffffff, \
0x40000000
/* Subtract two large negative numbers with a positive result.
Should set neither the carry nor the overflow flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x40000000, \
0x3fffffff
/* Subtract a large positive from a large negative number. Should
set overflow but not the carry flag. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x80000000, \
0x7fffffff
/* Subtract a large negative from a large positive number. Should
set both the overflow and carry flags. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x7fffffff, \
0x80000000
/* Check that range exceptions are triggered. */
SET_SPR_SR_FLAGS SPR_SR_OVE, r2, r3
/* Check that an overflow alone causes a RANGE Exception. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x80000000, \
0x7fffffff
/* Check that a carry alone does not cause a RANGE Exception. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x3fffffff, \
0x40000000
/* Check that carry and overflow together cause an exception. */
TEST_INST_FF_I32_I32 0, SPR_SR_CY | SPR_SR_OV, l.sub, 0x7fffffff, \
0x80000000
CLEAR_SPR_SR_FLAGS SPR_SR_OVE, r2, r3
POP LINK_REGISTER_R9
RETURN_TO_LINK_REGISTER_R9
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