From dc2d54edf26dc266e4787b30fa796a4db1339936 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Sat, 22 Jun 2024 18:05:03 +0200
Subject: Added 66 F2/F3 A4 opcode ({DYNAREC] too)

---
 src/dynarec/arm64/dynarec_arm64_66.c | 29 ++++++++++++++++++++++++++++-
 src/dynarec/la64/dynarec_la64_66.c   | 32 ++++++++++++++++++++++++++++++++
 src/dynarec/rv64/dynarec_rv64_66.c   | 32 +++++++++++++++++++++++++++++++-
 src/emu/x64run66.c                   | 15 ++++++++++++++-
 4 files changed, 105 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/dynarec/arm64/dynarec_arm64_66.c b/src/dynarec/arm64/dynarec_arm64_66.c
index 15ce091b..3dc765df 100644
--- a/src/dynarec/arm64/dynarec_arm64_66.c
+++ b/src/dynarec/arm64/dynarec_arm64_66.c
@@ -758,7 +758,34 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             STRH_U12(xRAX, x1, 0);
             SMWRITELOCK(lock);
             break;
-
+        case 0xA4:
+            SMREAD();
+            if(rep) {
+                INST_NAME("REP MOVSB");
+                CBZx_NEXT(xRCX);
+                TBNZ_MARK2(xFlags, F_DF);
+                MARK;   // Part with DF==0
+                LDRB_S9_postindex(x1, xRSI, 1);
+                STRB_S9_postindex(x1, xRDI, 1);
+                SUBx_U12(xRCX, xRCX, 1);
+                CBNZx_MARK(xRCX);
+                B_NEXT_nocond;
+                MARK2;  // Part with DF==1
+                LDRB_S9_postindex(x1, xRSI, -1);
+                STRB_S9_postindex(x1, xRDI, -1);
+                SUBx_U12(xRCX, xRCX, 1);
+                CBNZx_MARK2(xRCX);
+                // done
+            } else {
+                INST_NAME("MOVSB");
+                GETDIR(x3, 1);
+                LDRB_U12(x1, xRSI, 0);
+                STRB_U12(x1, xRDI, 0);
+                ADDx_REG(xRSI, xRSI, x3);
+                ADDx_REG(xRDI, xRDI, x3);
+            }
+            SMWRITE();
+            break;
         case 0xA5:
             SMREAD();
             if(rep) {
diff --git a/src/dynarec/la64/dynarec_la64_66.c b/src/dynarec/la64/dynarec_la64_66.c
index 5130a3b0..3c32462d 100644
--- a/src/dynarec/la64/dynarec_la64_66.c
+++ b/src/dynarec/la64/dynarec_la64_66.c
@@ -413,6 +413,38 @@ uintptr_t dynarec64_66(dynarec_la64_t* dyn, uintptr_t addr, uintptr_t ip, int ni
                 BSTRINS_D(gd, x2, 15, 0);
             }
             break;
+
+        case 0xA4:
+            if (rep) {
+                INST_NAME("REP MOVSB");
+                CBZ_NEXT(xRCX);
+                ANDI(x1, xFlags, 1 << F_DF);
+                BNEZ_MARK2(x1);
+                MARK; // Part with DF==0
+                LD_BU(x1, xRSI, 0);
+                ST_B(x1, xRDI, 0);
+                ADDI_D(xRSI, xRSI, 1);
+                ADDI_D(xRDI, xRDI, 1);
+                ADDI_D(xRCX, xRCX, -1);
+                BNEZ_MARK(xRCX);
+                B_NEXT_nocond;
+                MARK2; // Part with DF==1
+                LD_BU(x1, xRSI, 0);
+                ST_B(x1, xRDI, 0);
+                ADDI_D(xRSI, xRSI, -1);
+                ADDI_D(xRDI, xRDI, -1);
+                ADDI_D(xRCX, xRCX, -1);
+                BNEZ_MARK2(xRCX);
+                // done
+            } else {
+                INST_NAME("MOVSB");
+                GETDIR(x3, x1, 1);
+                LD_BU(x1, xRSI, 0);
+                ST_B(x1, xRDI, 0);
+                ADD_D(xRSI, xRSI, x3);
+                ADD_D(xRDI, xRDI, x3);
+            }
+            break;
         case 0xA5:
             if (rep) {
                 INST_NAME("REP MOVSW");
diff --git a/src/dynarec/rv64/dynarec_rv64_66.c b/src/dynarec/rv64/dynarec_rv64_66.c
index ba57b57d..0f0f31d0 100644
--- a/src/dynarec/rv64/dynarec_rv64_66.c
+++ b/src/dynarec/rv64/dynarec_rv64_66.c
@@ -717,7 +717,37 @@ uintptr_t dynarec64_66(dynarec_rv64_t* dyn, uintptr_t addr, uintptr_t ip, int ni
             SH(xRAX, x1, 0);
             SMWRITELOCK(lock);
             break;
-
+        case 0xA4:
+            if(rep) {
+                INST_NAME("REP MOVSB");
+                CBZ_NEXT(xRCX);
+                ANDI(x1, xFlags, 1<<F_DF);
+                BNEZ_MARK2(x1);
+                MARK;   // Part with DF==0
+                LBU(x1, xRSI, 0);
+                SB(x1, xRDI, 0);
+                ADDI(xRSI, xRSI, 1);
+                ADDI(xRDI, xRDI, 1);
+                SUBI(xRCX, xRCX, 1);
+                BNEZ_MARK(xRCX);
+                B_NEXT_nocond;
+                MARK2;  // Part with DF==1
+                LBU(x1, xRSI, 0);
+                SB(x1, xRDI, 0);
+                SUBI(xRSI, xRSI, 1);
+                SUBI(xRDI, xRDI, 1);
+                SUBI(xRCX, xRCX, 1);
+                BNEZ_MARK2(xRCX);
+                // done
+            } else {
+                INST_NAME("MOVSB");
+                GETDIR(x3, x1, 1);
+                LBU(x1, xRSI, 0);
+                SB(x1, xRDI, 0);
+                ADD(xRSI, xRSI, x3);
+                ADD(xRDI, xRDI, x3);
+            }
+            break;
         case 0xA5:
             if(rep) {
                 INST_NAME("REP MOVSW");
diff --git a/src/emu/x64run66.c b/src/emu/x64run66.c
index 536583bc..17199c71 100644
--- a/src/emu/x64run66.c
+++ b/src/emu/x64run66.c
@@ -477,7 +477,20 @@ uintptr_t Run66(x64emu_t *emu, rex_t rex, int rep, uintptr_t addr)
                 *(uint16_t*)F64 = R_AX;
         }
         break;
-
+    case 0xA4:                      /* (REP) MOVSB */
+        tmp8s = ACCESS_FLAG(F_DF)?-1:+1;
+        tmp64u = (rep)?R_RCX:1L;
+        while(tmp64u) {
+            #ifndef TEST_INTERPRETER
+            *(uint8_t*)R_RDI = *(uint8_t*)R_RSI;
+            #endif
+            R_RDI += tmp8s;
+            R_RSI += tmp8s;
+            --tmp64u;
+        }
+        if(rep)
+            R_RCX = tmp64u;
+        break;
     case 0xA5:              /* (REP) MOVSW */
         tmp8s = ACCESS_FLAG(F_DF)?-1:+1;
         tmp64u = (rep)?R_RCX:1L;
-- 
cgit 1.4.1