/* Tests instruction l.sub. Copyright (C) 2017-2022 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 . */ # 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