From c66be063aa30b8ec8e3366fa7767596ef2ecc8bb Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Sun, 23 Jun 2024 20:22:02 +0200
Subject: Small improvment to 0F BC/BD opcodes ([ARM64_DYNAREC] too)

---
 src/dynarec/arm64/dynarec_arm64_0f.c | 8 ++++----
 src/emu/x64run0f.c                   | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/dynarec/arm64/dynarec_arm64_0f.c b/src/dynarec/arm64/dynarec_arm64_0f.c
index 3547b670..545a9554 100644
--- a/src/dynarec/arm64/dynarec_arm64_0f.c
+++ b/src/dynarec/arm64/dynarec_arm64_0f.c
@@ -2138,7 +2138,7 @@ uintptr_t dynarec64_0F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             break;
         case 0xBC:
             INST_NAME("BSF Gd, Ed");
-            SETFLAGS(X_ZF, SF_SUBSET);
+            SETFLAGS(X_ZF, SF_SET_DF);
             SET_DFNONE(x1);
             nextop = F8;
             GETED(0);
@@ -2149,13 +2149,13 @@ uintptr_t dynarec64_0F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             CLZxw(gd, x1);    // x2 gets leading 0 == BSF
             MARK;
             IFX(X_ZF) {
-                CSETw(x1, cEQ);    //ZF not set
+                CSETw(x1, cEQ);    //other flags are undefined
                 BFIw(xFlags, x1, F_ZF, 1);
             }
             break;
         case 0xBD:
             INST_NAME("BSR Gd, Ed");
-            SETFLAGS(X_ZF, SF_SUBSET);
+            SETFLAGS(X_ZF, SF_SET_DF);
             SET_DFNONE(x1);
             nextop = F8;
             GETED(0);
@@ -2167,7 +2167,7 @@ uintptr_t dynarec64_0F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             NEGxw_REG(gd, gd);   // complement
             MARK;
             IFX(X_ZF) {
-                CSETw(x1, cEQ);    //ZF not set
+                CSETw(x1, cEQ);    //other flags are undefined
                 BFIw(xFlags, x1, F_ZF, 1);
             }
             break;
diff --git a/src/emu/x64run0f.c b/src/emu/x64run0f.c
index 2a2c78cb..8aa634ae 100644
--- a/src/emu/x64run0f.c
+++ b/src/emu/x64run0f.c
@@ -1543,7 +1543,7 @@ uintptr_t Run0F(x64emu_t *emu, rex_t rex, uintptr_t addr, int *step)
             }
             break;
         case 0xBC:                      /* BSF Ed,Gd */
-            CHECK_FLAGS(emu);
+            RESET_FLAGS(emu);
             nextop = F8;
             GETED(0);
             GETGD;
@@ -1570,7 +1570,7 @@ uintptr_t Run0F(x64emu_t *emu, rex_t rex, uintptr_t addr, int *step)
             }
             break;
         case 0xBD:                      /* BSR Ed,Gd */
-            CHECK_FLAGS(emu);
+            RESET_FLAGS(emu);
             nextop = F8;
             GETED(0);
             GETGD;
-- 
cgit 1.4.1