From 2d7f939589323885315af1ecb4e96e43aa580a4d Mon Sep 17 00:00:00 2001
From: Jacob Lifshay <programmerjake@gmail.com>
Date: Thu, 27 Aug 2020 17:11:44 -0700
Subject: [PATCH] working on add[o][.] implementation

---
 src/instr_models.rs | 27 ++++++++++++++-------------
 src/lib.rs          | 34 +++++++++++++++++-----------------
 2 files changed, 31 insertions(+), 30 deletions(-)

diff --git a/src/instr_models.rs b/src/instr_models.rs
index df034e1..8711e22 100644
--- a/src/instr_models.rs
+++ b/src/instr_models.rs
@@ -38,19 +38,20 @@ macro_rules! create_instr_variants_cr {
     };
 }
 
-// create_instr_variants_ov_cr!(add, addo, add_, addo_, i64);
-//
-// pub fn addo(inputs: InstructionInput) -> InstructionResult {
-//     let ra = inputs.ra as i64;
-//     let rb = inputs.rb as i64;
-//     let (result, overflow) = ra.overflowing_add(rb);
-//     let result = result as u64;
-//     InstructionResult {
-//         rt: Some(result),
-//         overflow: Some(OverflowFlags::from_overflow(overflow)),
-//         ..InstructionResult::default()
-//     }
-// }
+create_instr_variants_ov_cr!(add, addo, add_, addo_, i64);
+
+pub fn addo(inputs: InstructionInput) -> InstructionResult {
+    let ra = inputs.ra as i64;
+    let rb = inputs.rb as i64;
+    let (result, ov) = ra.overflowing_add(rb);
+    let result = result as u64;
+    let ov32 = (ra as i32).overflowing_add(rb as i32).1;
+    InstructionResult {
+        rt: Some(result),
+        overflow: Some(OverflowFlags { so: ov, ov, ov32 }),
+        ..InstructionResult::default()
+    }
+}
 
 create_instr_variants_ov_cr!(divde, divdeo, divde_, divdeo_, i64);
 
diff --git a/src/lib.rs b/src/lib.rs
index fc2d22c..98880c2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -405,23 +405,23 @@ macro_rules! instrs {
 }
 
 instrs! {
-    // // add
-    // #[enumerant = Add]
-    // fn add(ra, rb) -> (rt) {
-    //     "add"
-    // }
-    // #[enumerant = AddO]
-    // fn addo(ra, rb) -> (rt, ov) {
-    //     "addo"
-    // }
-    // #[enumerant = Add_]
-    // fn add_(ra, rb) -> (rt, cr0) {
-    //     "add."
-    // }
-    // #[enumerant = AddO_]
-    // fn addo_(ra, rb) -> (rt, ov, cr0) {
-    //     "addo."
-    // }
+    // add
+    #[enumerant = Add]
+    fn add(ra, rb) -> (rt) {
+        "add"
+    }
+    #[enumerant = AddO]
+    fn addo(ra, rb) -> (rt, ov) {
+        "addo"
+    }
+    #[enumerant = Add_]
+    fn add_(ra, rb) -> (rt, cr0) {
+        "add."
+    }
+    #[enumerant = AddO_]
+    fn addo_(ra, rb) -> (rt, ov, cr0) {
+        "addo."
+    }
 
     // divde
     #[enumerant = DivDE]
-- 
2.30.2