From db23c306ae1e315520677f57eb0a3244e657bcb9 Mon Sep 17 00:00:00 2001
From: Jacob Lifshay <programmerjake@gmail.com>
Date: Thu, 27 Aug 2020 13:57:43 -0700
Subject: [PATCH] add add[o][.]

---
 src/instr_models.rs | 14 ++++++++++++++
 src/lib.rs          | 22 ++++++++++++++++++++--
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/src/instr_models.rs b/src/instr_models.rs
index c58806e..2547fa3 100644
--- a/src/instr_models.rs
+++ b/src/instr_models.rs
@@ -38,6 +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!(divde, divdeo, divde_, divdeo_, i64);
 
 pub fn divdeo(inputs: InstructionInput) -> InstructionResult {
diff --git a/src/lib.rs b/src/lib.rs
index 51f0d16..98880c2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -312,8 +312,8 @@ macro_rules! instr {
                         "mfxer $1\n",
                         "mfcr $2\n",
                     )
-                    : "=&r"(rt), "=&r"(xer), "=&r"(cr)
-                    : "r"(ra), "r"(rb), "r"(rc), "r"(0u64), "r"(!0x8000_0000u64)
+                    : "=&b"(rt), "=&b"(xer), "=&b"(cr)
+                    : "b"(ra), "b"(rb), "b"(rc), "b"(0u64), "b"(!0x8000_0000u64)
                     : "xer", "cr");
             }
             let mut retval = InstructionResult::default();
@@ -405,6 +405,24 @@ 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."
+    }
+
     // divde
     #[enumerant = DivDE]
     fn divde(ra, rb) -> (rt) {
-- 
2.30.2