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authoriximeow <me@iximeow.net>2021-08-21 12:13:01 -0700
committeriximeow <me@iximeow.net>2021-08-21 12:13:01 -0700
commitcef4feeaf9c64e03a6728f267750ac2fb32eb9ff (patch)
treedcfc974ad5d1beffe629138aebdfa92fbf7f90a5 /test/protected_mode/operand.rs
parent4612215ddc98dabaffedc36f6fe402bb9f04119a (diff)
report memory sizes for push, pop, call, ret
these instructions had memory sizes reported for the operand, if it was a memory operand, but for versions with non-memory operands the decoded `Instruction` would imply that non memory access would happen at all. now, decoded instructions in these cases will report a more useful memory size.
Diffstat (limited to 'test/protected_mode/operand.rs')
-rw-r--r--test/protected_mode/operand.rs18
1 files changed, 18 insertions, 0 deletions
diff --git a/test/protected_mode/operand.rs b/test/protected_mode/operand.rs
index fd850da..a114e69 100644
--- a/test/protected_mode/operand.rs
+++ b/test/protected_mode/operand.rs
@@ -26,3 +26,21 @@ fn memory_widths() {
assert_eq!(mem_size_of(&[0x66, 0x33, 0x00]).size_name(), "word");
assert_eq!(mem_size_of(&[0x33, 0x00]).size_name(), "dword");
}
+
+#[test]
+fn test_implied_memory_width() {
+ fn mem_size_of(data: &[u8]) -> Option<u8> {
+ let decoder = InstDecoder::default();
+ decoder.decode_slice(data).unwrap().mem_size().unwrap().bytes_size()
+ }
+
+ // test push, pop, call, and ret
+ assert_eq!(mem_size_of(&[0xc3]), Some(4));
+ assert_eq!(mem_size_of(&[0xe8, 0x11, 0x22, 0x33, 0x44]), Some(4));
+ assert_eq!(mem_size_of(&[0x50]), Some(4));
+ assert_eq!(mem_size_of(&[0x58]), Some(4));
+ assert_eq!(mem_size_of(&[0x66, 0x50]), Some(4));
+ assert_eq!(mem_size_of(&[0x66, 0x58]), Some(4));
+ assert_eq!(mem_size_of(&[0xff, 0xf0]), Some(4));
+ assert_eq!(mem_size_of(&[0x66, 0xff, 0xf0]), Some(2));
+}