Subversion Repositories fwrisc

/*
 * fwrisc_instr_tests_exception.cpp
 *
 *  Created on: Nov 11, 2018
 *      Author: ballance
 */
 
#include "fwrisc_instr_tests_exception.h"
 
fwrisc_instr_tests_exception::fwrisc_instr_tests_exception() {
	// TODO Auto-generated constructor stub
 
}
 
fwrisc_instr_tests_exception::~fwrisc_instr_tests_exception() {
	// TODO Auto-generated destructor stub
}
 
TEST_F(fwrisc_instr_tests_exception, j) {
	reg_val_s exp[] = {
			{8, 	4},
			{37, 	0x8000002C}, // MTVEC
			{41,	0x80000018}, // MEPC
			{42,	0x00000000}, // MCAUSE
			{43,	0x80000022}, // MTVAL
	};
	const char *program = R"(
		entry:
			la		x8, _trap_handler 
			csrw	mtvec, x8
			j		1f+2		// Jump will not be taken, since the address is misaligned
 
			li		x8, 4		// When we come back, clear out x8
			j		done
		1:
			li		x8, 26
			j		done
			nop
		_trap_handler:
			csrr	x8, mepc // Increment beyond the faulting instruction
			addi	x8, x8, 4
			csrw	mepc, x8
			mret
			)";
 
	runtest(program, exp, sizeof(exp)/sizeof(reg_val_s));
}
 
TEST_F(fwrisc_instr_tests_exception, jalr) {
	reg_val_s exp[] = {
			{8, 	4},
			{9, 	0x80000028},
			{37, 	0x80000034}, // MTVEC
			{41,	0x80000020}, // MEPC
			{42,	0x00000000}, // MCAUSE
			{43,	0x8000002a}, // MTVAL
	};
	const char *program = R"(
		entry:
			la		x8, _trap_handler 
			csrw	mtvec, x8
			la		x9, 1f
			jalr	2(x9)		// Jump will not be taken, since the address is misaligned
 
			li		x8, 4		// When we come back, clear out x8
			j		done
		1:
			li		x8, 26
			j		done
			nop
		_trap_handler:
			csrr	x8, mepc // Increment beyond the faulting instruction
			addi	x8, x8, 4
			csrw	mepc, x8
			mret
			)";
 
	runtest(program, exp, sizeof(exp)/sizeof(reg_val_s));
}
 
TEST_F(fwrisc_instr_tests_exception, lw) {
	reg_val_s exp[] = {
			{8, 	4},
			{9, 	0x80000044},
			{37, 	0x80000034}, // MTVEC
			{41,	0x80000020}, // MEPC
			{42,	0x00000004}, // MCAUSE
			{43,	0x80000046}, // MTVAL
	};
	const char *program = R"(
		entry:
			la		x8, _trap_handler 
			csrw	mtvec, x8
			la		x9, data
			lw		x7, 2(x9)	
 
			li		x8, 4		// When we come back, clear out x8
			j		done
		1:
			li		x8, 26
			j		done
			nop
		_trap_handler:
			csrr	x8, mepc // Increment beyond the faulting instruction
			addi	x8, x8, 4
			csrw	mepc, x8
			mret
		data:
			.word	0x01020304
			.word	0x05060708
			)";
 
	runtest(program, exp, sizeof(exp)/sizeof(reg_val_s));
}
 
TEST_F(fwrisc_instr_tests_exception, bne) {
	reg_val_s exp[] = {
			{8, 	4},
			{37, 	0x8000002C}, // MTVEC
			{41,	0x80000018}, // MEPC
			{42,	0x00000000}, // MCAUSE
			{43,	0x80000022}, // MTVAL
	};
	const char *program = R"(
		entry:
			la		x8, _trap_handler 
			csrw	mtvec, x8
			bne		x8, zero, 1f+2	// Jump will not be taken, since the address is misaligned
 
			li		x8, 4				// When we come back, clear out x8
			j		done
		1:
			li		x8, 26
			j		done
			nop
		_trap_handler:
			csrr	x8, mepc // Increment beyond the faulting instruction
			addi	x8, x8, 4
			csrw	mepc, x8
			mret
			)";
 
	runtest(program, exp, sizeof(exp)/sizeof(reg_val_s));
}