From bbdf78c061b6e685d1992dcdeac692fc2f8f0d34 Mon Sep 17 00:00:00 2001 From: iximeow Date: Mon, 1 Apr 2024 23:38:57 -0700 Subject: display opt: mem size labels and minor segment reporting changes for mem size labels: add one new "BUG" entry at the start of the array so `mem_size` does not need to be adjusted before being used to look up a string from the `MEM_SIZE_STRINGS` array. it's hard to measure the direct benefit of this, but it shrinks codegen size by a bit and simplfies a bit of assembly.... for segment reporting changes: stos/scas/lods do not actually need special segment override logic. instead, set their use of `es` when decoded, if appropriate. this is potentially ambiguous; in non-64bit modes the sequence `26aa` would decode as `stos` with explicit `es` prefix. this is now identical to simply decoding `aa`, which now also reports that there is an explicit `es` prefix even though there is no prefix on tne instruction. on the other hand, the prefix-reported segment now more accurately describes the memory selector through which memory accesses will happen. seems ok? --- src/real_mode/display.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/real_mode/display.rs') diff --git a/src/real_mode/display.rs b/src/real_mode/display.rs index 9450a39..6472c6c 100644 --- a/src/real_mode/display.rs +++ b/src/real_mode/display.rs @@ -3436,7 +3436,7 @@ fn contextualize_intel(instr: &Instruction, colors: } if x.is_memory() { - out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?; + out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?; out.write_str(" ")?; } @@ -3456,7 +3456,7 @@ fn contextualize_intel(instr: &Instruction, colors: out.write_str(", ")?; let x = Operand::from_spec(instr, instr.operands[i as usize]); if x.is_memory() { - out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize - 1])?; + out.write_str(MEM_SIZE_STRINGS[instr.mem_size as usize])?; out.write_str(" ")?; } if let Some(prefix) = instr.segment_override_for_op(i) { -- cgit v1.1