From 6bf84d832f74a380d860fd9d6194984864d679a3 Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Wed, 25 Mar 2015 19:16:30 -0700
Subject: [PATCH] fresx and some vec128 constant prop.

---
 src/xenia/cpu/frontend/ppc_emit_fpu.cc | 14 ++++++++++++--
 src/xenia/cpu/hir/value.cc             | 10 ++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/xenia/cpu/frontend/ppc_emit_fpu.cc b/src/xenia/cpu/frontend/ppc_emit_fpu.cc
index bc72c0a13..25176858f 100644
--- a/src/xenia/cpu/frontend/ppc_emit_fpu.cc
+++ b/src/xenia/cpu/frontend/ppc_emit_fpu.cc
@@ -114,8 +114,18 @@ XEEMITTER(fmulsx, 0xEC000032, A)(PPCHIRBuilder& f, InstrData& i) {
 }
 
 XEEMITTER(fresx, 0xEC000030, A)(PPCHIRBuilder& f, InstrData& i) {
-  XEINSTRNOTIMPLEMENTED();
-  return 1;
+  // frD <- 1.0 / (frB)
+  Value* v = f.Convert(
+      f.Div(f.LoadConstant(1.0f), f.Convert(f.LoadFPR(i.A.FRB), FLOAT32_TYPE)),
+      FLOAT64_TYPE);
+  f.StoreFPR(i.A.FRT, v);
+  // f.UpdateFPRF(v);
+  if (i.A.Rc) {
+    // e.update_cr_with_cond(1, v);
+    XEINSTRNOTIMPLEMENTED();
+    return 1;
+  }
+  return 0;
 }
 
 XEEMITTER(frsqrtex, 0xFC000034, A)(PPCHIRBuilder& f, InstrData& i) {
diff --git a/src/xenia/cpu/hir/value.cc b/src/xenia/cpu/hir/value.cc
index 719967e20..ee3fceced 100644
--- a/src/xenia/cpu/hir/value.cc
+++ b/src/xenia/cpu/hir/value.cc
@@ -357,6 +357,11 @@ void Value::Neg() {
     case FLOAT64_TYPE:
       constant.f64 = -constant.f64;
       break;
+    case VEC128_TYPE:
+      for (int i = 0; i < 4; ++i) {
+        constant.v128.f32[i] = -constant.v128.f32[i];
+      }
+      break;
     default:
       assert_unhandled_case(type);
       break;
@@ -383,6 +388,11 @@ void Value::Abs() {
     case FLOAT64_TYPE:
       constant.f64 = abs(constant.f64);
       break;
+    case VEC128_TYPE:
+      for (int i = 0; i < 4; ++i) {
+        constant.v128.f32[i] = std::fabsf(constant.v128.f32[i]);
+      }
+      break;
     default:
       assert_unhandled_case(type);
       break;