From e13ee157918ed0402bd2befa1920202d63b3e8dc Mon Sep 17 00:00:00 2001
From: Malcolm <malcolmjestadt@gmail.com>
Date: Tue, 15 Sep 2026 17:16:38 -0400
Subject: [PATCH] SPU LLVM: Stop inverting float-to-int saturation on ARM64

- Fix CFLTS saturation in the approximate and accurate xfloat paths
- Original fix credit to jpolo1224 of armsx3 https://github.com/ARMSX2/ARMSX3/commit/424514fde67adb83540d39feea860b5eb17b3500
- Accurate-xfloat follow-up https://github.com/ARMSX2/ARMSX3/commit/19d23eb6913c34cb63c00861bf95e58c3144e78e

Co-authored-by: jpolo1224 <jpolo1224@gmail.com>
---
 rpcs3/Emu/Cell/SPULLVMRecompiler.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/rpcs3/Emu/Cell/SPULLVMRecompiler.cpp b/rpcs3/Emu/Cell/SPULLVMRecompiler.cpp
index 4659a4d828..b6cf013a6a 100644
--- a/rpcs3/Emu/Cell/SPULLVMRecompiler.cpp
+++ b/rpcs3/Emu/Cell/SPULLVMRecompiler.cpp
@@ -9238,7 +9238,12 @@ public:
 			}
 
 			r.value = m_ir->CreateFPToSI(a.value, get_type<s32[4]>());
+#if defined(ARCH_ARM64)
+			set_vr(op.rt, select(fcmp_ord(a >= fsplat<f64[4]>(std::exp2(31.f))), splat<s32[4]>(0x7fffffff),
+				select(fcmp_ord(a < fsplat<f64[4]>(-std::exp2(31.f))), splat<s32[4]>(0x80000000), r)));
+#else
 			set_vr(op.rt, r ^ sext<s32[4]>(fcmp_ord(a >= fsplat<f64[4]>(std::exp2(31.f)))));
+#endif
 		}
 		else
 		{
@@ -9253,7 +9258,12 @@ public:
 
 			value_t<s32[4]> r;
 			r.value = m_ir->CreateFPToSI(a.value, get_type<s32[4]>());
+#if defined(ARCH_ARM64)
+			const auto sat_hi = bitcast<s32[4]>(a) > splat<s32[4]>(((31 + 127) << 23) - 1);
+			set_vr(op.rt, select(sat_hi, splat<s32[4]>(0x7fffffff), select(fcmp_uno(a != a), splat<s32[4]>(0x80000000), r)));
+#else
 			set_vr(op.rt, r ^ sext<s32[4]>(bitcast<s32[4]>(a) > splat<s32[4]>(((31 + 127) << 23) - 1)));
+#endif
 		}
 	}