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|
extern crate yaxpeax_arch;
extern crate yaxpeax_mips;
use yaxpeax_arch::{Arch, Decoder, LengthedInstruction};
use yaxpeax_mips::{MIPS, Instruction, Opcode};
fn test_decode(data: [u8; 4], expected: Instruction) {
let instr = <MIPS as Arch>::Decoder::default().decode(data.to_vec()).unwrap();
assert!(
instr == expected,
"decode error for {:02x}{:02x}{:02x}{:02x}:\n decoded: {:?}\n expected: {:?}\n",
data[0], data[1], data[2], data[3],
instr, expected
);
}
fn test_display(data: [u8; 4], expected: &'static str) {
let instr = <MIPS as Arch>::Decoder::default().decode(data.to_vec()).unwrap();
let text = format!("{}", instr);
assert!(
text == expected,
"display error for {:02x}{:02x}{:02x}{:02x}:\n decoded: {:?}\n displayed: {}\n expected: {}\n",
data[0], data[1], data[2], data[3],
instr,
text, expected
);
}
#[test]
fn test_arithmetic() {
test_display(
[0x08, 0x00, 0x00, 0x21],
"addi zero, t0, 0x8"
);
test_display(
[0xf8, 0xff, 0x29, 0x21],
"addi t1, t1, -0x8"
);
test_display(
[0x0c, 0x01, 0x04, 0x24],
"addiu a0, zero, 0x10c"
);
test_display(
[0x20, 0xae, 0x08, 0x25],
"addiu t0, t0, -0x51e0"
);
test_display(
[0xa0, 0x23, 0x29, 0x35],
"ori t1, t1, 0x23a0"
);
test_display(
[0x00, 0x23, 0x04, 0x00],
"sll a0, a0, 0xc"
);
}
#[test]
fn test_br() {
test_display(
[0xfc, 0xff, 0x20, 0x15],
"bne t1, zero, -0x4"
);
test_display(
[0x08, 0x00, 0x40, 0x01],
"jr t2"
);
test_display(
[0x08, 0x00, 0xe0, 0x03],
"jr ra"
);
test_display(
[0x08, 0x00, 0x00, 0x10],
"b $+0x8"
);
// TODO: this is inaccurate! this really is setting the low 28 bits of $pc, not branching
// forward or something.
test_display(
[0xab, 0x05, 0x00, 0x0c],
"jal $+0x16ac"
);
}
#[test]
fn test_cmp() {
// slt
// sltu
// slti
test_display(
[0x07, 0x00, 0xe1, 0x2d],
"sltiu at, t7, 0x7"
);
}
#[test]
fn test_mov() {
test_display(
[0x00, 0x00, 0xbf, 0x8f],
"lw ra, (sp)"
);
test_display(
[0x09, 0x80, 0x08, 0x3c],
"lui t0, 0x8009"
);
test_display(
[0x02, 0x00, 0x09, 0x3c],
"lui t1, 0x2"
);
test_display(
[0x00, 0x7f, 0xc0, 0x6f],
"ldr zero, 0x7f00(fp)"
);
test_display(
[0x66, 0xd2, 0x29, 0xa4],
"sh t1, -0x2d9a(at)"
);
test_display(
[0x00, 0x00, 0x00, 0xad],
"sw zero, (t0)"
);
test_display(
[0x04, 0x00, 0x00, 0xad],
"sw zero, 0x4(t0)"
);
test_display(
[0x25, 0x20, 0x00, 0x02],
"move a0, s0"
);
}
#[test]
fn test_misc() {
test_display(
[0x00, 0x00, 0x00, 0x00],
"nop"
);
/*test_display(
[0x00, 0x28, 0x88, 0x40],
"mtc0 t0, a1, 0"
);*/
test_display(
[0x00, 0x28, 0x88, 0x40],
"cop1 0x882800"
);
/*
test_display(
[0x02, 0x00, 0x00, 0x42],
"tlbwi"
);
*/
test_display(
[0x02, 0x00, 0x00, 0x42],
"cop1 0x2000002"
);
/*
test_display(
[0x08, 0x00, 0x00, 0x42],
"tlbp"
);
*/
test_display(
[0x08, 0x00, 0x00, 0x42],
"cop1 0x2000008"
);
/*
test_display(
[0x00, 0x50, 0x08, 0x40],
"mfc t0, t2, 0"
);
*/
test_display(
[0x00, 0x50, 0x08, 0x40],
"cop1 0x85000"
);
}
|
