From 7c9715f00cdbe8720920ffe3e865040699bf2b01 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 1 Apr 2024 21:38:44 -0400
Subject: [PATCH] Change mind about carry behaviour.

---
 InstructionSets/ARM/Executor.hpp | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/InstructionSets/ARM/Executor.hpp b/InstructionSets/ARM/Executor.hpp
index b49646747..1fe075bae 100644
--- a/InstructionSets/ARM/Executor.hpp
+++ b/InstructionSets/ARM/Executor.hpp
@@ -120,13 +120,8 @@ struct Executor {
 			operand2 = fields.immediate();
 			if(fields.rotate()) {
 				shift<ShiftType::RotateRight, shift_sets_carry>(operand2, fields.rotate(), rotate_carry);
-			} else {
-				// This is possibly clarified by later data sheets; take carry as if a rotate by 32
-				// had occurred.
-				if constexpr (shift_sets_carry) {
-					rotate_carry = operand2 & 0x8000'0000;
-				}
 			}
+			// Complete guess: carry is unaffected by an immediate value that doesn't rotate.
 		} else {
 			operand2 = decode_shift<true, shift_sets_carry>(fields, rotate_carry, shift_by_register ? 8 : 4);
 		}