[PPC] Implement vaddcuw

Wunkolo · Wunkolo · commit 23381a9b1282 · 2023-02-06T08:57:37.000-08:00
I don't know of any title that utilizes this instruction, but I went ahead and implemented it for completeness. Verified the implementation with `instr__gen_vaddcuw` from xenia-project#1348. Can be grabbed with: ``` git checkout origin/gen_tests -- src\xenia\cpu\ppc\testing\*vaddcuw.s ```
diff --git a/src/xenia/cpu/ppc/ppc_emit_altivec.cc b/src/xenia/cpu/ppc/ppc_emit_altivec.cc
@@ -358,8 +358,13 @@ int InstrEmit_mtvscr(PPCHIRBuilder& f, const InstrData& i) {
 }
 
 int InstrEmit_vaddcuw(PPCHIRBuilder& f, const InstrData& i) {
-  XEINSTRNOTIMPLEMENTED();
-  return 1;
+  Value* sum = f.VectorAdd(f.LoadVR(i.VX.VA), f.LoadVR(i.VX.VB), INT32_TYPE,
+                           ARITHMETIC_UNSIGNED);
+  Value* overflow = f.VectorCompareUGT(f.LoadVR(i.VX.VA), sum, INT32_TYPE);
+  Value* carry =
+      f.VectorShr(overflow, f.LoadConstantVec128(vec128i(31)), INT32_TYPE);
+  f.StoreVR(i.VX.VD, carry);
+  return 0;
 }
 
 int InstrEmit_vaddfp_(PPCHIRBuilder& f, uint32_t vd, uint32_t va, uint32_t vb) {

Original file line number	Diff line number	Diff line change
`@@ -358,8 +358,13 @@ int InstrEmit_mtvscr(PPCHIRBuilder& f, const InstrData& i) {`
`358`	`358`	`}`
`359`	`359`
`360`	`360`	`int InstrEmit_vaddcuw(PPCHIRBuilder& f, const InstrData& i) {`
`361`		`- XEINSTRNOTIMPLEMENTED();`
`362`		`- return 1;`
	`361`	`+ Value* sum = f.VectorAdd(f.LoadVR(i.VX.VA), f.LoadVR(i.VX.VB), INT32_TYPE,`
	`362`	`+ ARITHMETIC_UNSIGNED);`
	`363`	`+ Value* overflow = f.VectorCompareUGT(f.LoadVR(i.VX.VA), sum, INT32_TYPE);`
	`364`	`+ Value* carry =`
	`365`	`+ f.VectorShr(overflow, f.LoadConstantVec128(vec128i(31)), INT32_TYPE);`
	`366`	`+ f.StoreVR(i.VX.VD, carry);`
	`367`	`+ return 0;`
`363`	`368`	`}`
`364`	`369`
`365`	`370`	`int InstrEmit_vaddfp_(PPCHIRBuilder& f, uint32_t vd, uint32_t va, uint32_t vb) {`