diff --git a/src/dynarec/arm64/dynarec_arm64_66.c b/src/dynarec/arm64/dynarec_arm64_66.c
index eab26e253..0f0bb3a64 100644
--- a/src/dynarec/arm64/dynarec_arm64_66.c
+++ b/src/dynarec/arm64/dynarec_arm64_66.c
@@ -78,9 +78,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x05:
             INST_NAME("ADD AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            MOV32w(x2, i32);
+            MOV32w(x2, i16);
             emit_add16(dyn, ninst, x1, x2, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
@@ -117,9 +117,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x0D:
             INST_NAME("OR AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            emit_or16c(dyn, ninst, x1, i32, x3, x4);
+            emit_or16c(dyn, ninst, x1, i16, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
 
@@ -154,9 +154,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             INST_NAME("ADC AX, Iw");
             READFLAGS(X_CF);
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            MOV32w(x2, i32);
+            MOV32w(x2, i16);
             emit_adc16(dyn, ninst, x1, x2, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
@@ -224,9 +224,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x25:
             INST_NAME("AND AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            emit_and16c(dyn, ninst, x1, i32, x3, x4);
+            emit_and16c(dyn, ninst, x1, i16, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
 
@@ -251,9 +251,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x2D:
             INST_NAME("SUB AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            MOV32w(x2, i32);
+            MOV32w(x2, i16);
             emit_sub16(dyn, ninst, x1, x2, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
@@ -279,9 +279,9 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x35:
             INST_NAME("XOR AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            emit_xor16c(dyn, ninst, x1, i32, x3, x4);
+            emit_xor16c(dyn, ninst, x1, i16, x3, x4);
             BFIz(xRAX, x1, 0, 16);
             break;
 
@@ -304,10 +304,10 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
         case 0x3D:
             INST_NAME("CMP AX, Iw");
             SETFLAGS(X_ALL, SF_SET_PENDING);
-            i32 = F16;
+            i16 = F16;
             UXTHw(x1, xRAX);
-            if(i32) {
-                MOV32w(x2, i32);
+            if(i16) {
+                MOV32w(x2, i16);
                 emit_cmp16(dyn, ninst, x1, x2, x3, x4, x5);
             } else {
                 emit_cmp16_0(dyn, ninst, x1, x3, x4);
diff --git a/src/dynarec/arm64/dynarec_arm64_660f.c b/src/dynarec/arm64/dynarec_arm64_660f.c
index b467cdf6c..e57aedb0d 100644
--- a/src/dynarec/arm64/dynarec_arm64_660f.c
+++ b/src/dynarec/arm64/dynarec_arm64_660f.c
@@ -2657,16 +2657,16 @@ uintptr_t dynarec64_660F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int n
         case 0xBF:
             INST_NAME("MOVSX Gw, Ew");
             nextop = F8;
-            GETGW(x1);
+            GETGD;
             if(MODREG) {
                 ed = xRAX+(nextop&7)+(rex.b<<3);
-                SXTHxw(gd, ed);
+                SXTHxw(x1, ed);
             } else {
                 SMREAD();
                 addr = geted(dyn, addr, ninst, nextop, &ed, x3, &fixedaddress, &unscaled, 0xfff<<1, 1, rex, NULL, 0, 0);
-                LDSHxw(gd, ed, fixedaddress);
+                LDSHxw(x1, ed, fixedaddress);
             }
-            GWBACK;
+            BFIx(gd, x1, 0, 16);
             break;
 
         case 0xC1:
diff --git a/src/dynarec/arm64/dynarec_arm64_6664.c b/src/dynarec/arm64/dynarec_arm64_6664.c
index 5e9a9a5a8..6131c4d33 100644
--- a/src/dynarec/arm64/dynarec_arm64_6664.c
+++ b/src/dynarec/arm64/dynarec_arm64_6664.c
@@ -248,7 +248,7 @@ uintptr_t dynarec64_6664(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int n
             break;
 
         case 0x8B:
-            INST_NAME("MOV Gd, FS:Ed");
+            INST_NAME("MOV Gw, FS:Ew");
             nextop=F8;
             GETGD;
             if(MODREG) {   // reg <= reg
diff --git a/src/dynarec/arm64/dynarec_arm64_66f0.c b/src/dynarec/arm64/dynarec_arm64_66f0.c
index 58f3af4d7..55baf056d 100644
--- a/src/dynarec/arm64/dynarec_arm64_66f0.c
+++ b/src/dynarec/arm64/dynarec_arm64_66f0.c
@@ -31,7 +31,6 @@ uintptr_t dynarec64_66F0(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int n
     uint8_t gd, ed, u8;
     uint8_t wback, wb1, wb2, gb1, gb2;
     int16_t i16;
-    int32_t i32;
     int64_t i64, j64;
     int64_t fixedaddress;
     int unscaled;
@@ -344,7 +343,7 @@ uintptr_t dynarec64_66F0(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int n
                             }
                         } else {
                             i64 = convert_bitmask_w(i16);
-                            if(!i64) {MOV32w(x5, i32);}
+                            if(!i64) {MOV32w(x5, i16);}
                             MARKLOCK;
                             LDAXRH(x1, wback);
                             if(i64) {
diff --git a/src/dynarec/arm64/dynarec_arm64_emit_math.c b/src/dynarec/arm64/dynarec_arm64_emit_math.c
index bb2ceea9f..0a72a8080 100644
--- a/src/dynarec/arm64/dynarec_arm64_emit_math.c
+++ b/src/dynarec/arm64/dynarec_arm64_emit_math.c
@@ -345,10 +345,10 @@ void emit_add8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4)
 }
 
 // emit ADD8 instruction, from s1, const c, store result in s1 using s3 and s4 as scratch
-void emit_add8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4)
+void emit_add8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4)
 {
     IFX(X_PEND) {
-        MOV32w(s4, c&0xff);
+        MOV32w(s4, c);
         STRB_U12(s1, xEmu, offsetof(x64emu_t, op1));
         STRB_U12(s4, xEmu, offsetof(x64emu_t, op2));
         SET_DF(s3, d_add8);
@@ -356,7 +356,7 @@ void emit_add8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4)
         SET_DFNONE(s3);
     }
     IFX(X_AF | X_OF) {
-        IFX(X_PEND) {} else {MOV32w(s4, c&0xff);}
+        IFX(X_PEND) {} else {MOV32w(s4, c);}
         ORRw_REG(s3, s1, s4);       // s3 = op1 | op2
         ANDw_REG(s4, s1, s4);       // s4 = op1 & op2
     }
@@ -432,11 +432,11 @@ void emit_sub8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4)
 }
 
 // emit SUB8 instruction, from s1, constant c, store result in s1 using s3 and s4 as scratch
-void emit_sub8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4, int s5)
+void emit_sub8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5)
 {
     MAYUSE(s5);
     IFX(X_ALL|X_PEND) {
-        MOV32w(s5, c&0xff);
+        MOV32w(s5, c);
     }
     IFX(X_PEND) {
         STRB_U12(s1, xEmu, offsetof(x64emu_t, op1));
@@ -453,7 +453,7 @@ void emit_sub8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4, in
     IFX(X_ALL) {
         SUBw_REG(s1, s1, s5);
     } else {
-        SUBw_U12(s1, s1, c&0xff);
+        SUBw_U12(s1, s1, c);
     }
     IFX(X_PEND) {
         STRB_U12(s1, xEmu, offsetof(x64emu_t, res));
@@ -1181,10 +1181,10 @@ void emit_adc8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4)
 }
 
 // emit ADC8 instruction, from s1, const c, store result in s1 using s3 and s4 as scratch
-void emit_adc8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4, int s5)
+void emit_adc8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5)
 {
     MAYUSE(s5);
-    MOV32w(s5, c&0xff);
+    MOV32w(s5, c);
     emit_adc8(dyn, ninst, s1, s5, s3, s4);
 }
 
@@ -1523,10 +1523,10 @@ void emit_sbb8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4)
 }
 
 // emit SBB8 instruction, from s1, constant c, store result in s1 using s3 and s4 as scratch
-void emit_sbb8c(dynarec_arm_t* dyn, int ninst, int s1, int c, int s3, int s4, int s5)
+void emit_sbb8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5)
 {
     MAYUSE(s5);
-    MOV32w(s5, c&0xff);
+    MOV32w(s5, c);
     emit_sbb8(dyn, ninst, s1, s5, s3, s4);
 }
 
diff --git a/src/dynarec/arm64/dynarec_arm64_helper.h b/src/dynarec/arm64/dynarec_arm64_helper.h
index 79b2760d5..cae4add9e 100644
--- a/src/dynarec/arm64/dynarec_arm64_helper.h
+++ b/src/dynarec/arm64/dynarec_arm64_helper.h
@@ -1438,11 +1438,11 @@ void emit_test32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s
 void emit_add32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
 void emit_add32c(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int64_t c, int s3, int s4, int s5);
 void emit_add8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
-void emit_add8c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4);
+void emit_add8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4);
 void emit_sub32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
 void emit_sub32c(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int64_t c, int s3, int s4, int s5);
 void emit_sub8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
-void emit_sub8c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4, int s5);
+void emit_sub8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5);
 void emit_or32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
 void emit_or32c(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int64_t c, int s3, int s4);
 void emit_xor32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
@@ -1474,13 +1474,13 @@ void emit_dec8(dynarec_arm_t* dyn, int ninst, int s1, int s3, int s4);
 void emit_adc32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
 //void emit_adc32c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4);
 void emit_adc8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
-void emit_adc8c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4, int s5);
+void emit_adc8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5);
 void emit_adc16(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
 //void emit_adc16c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4);
 void emit_sbb32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s2, int s3, int s4);
 //void emit_sbb32c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4);
 void emit_sbb8(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
-void emit_sbb8c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4, int s5);
+void emit_sbb8c(dynarec_arm_t* dyn, int ninst, int s1, int8_t c, int s3, int s4, int s5);
 void emit_sbb16(dynarec_arm_t* dyn, int ninst, int s1, int s2, int s3, int s4);
 //void emit_sbb16c(dynarec_arm_t* dyn, int ninst, int s1, int32_t c, int s3, int s4);
 void emit_neg32(dynarec_arm_t* dyn, int ninst, rex_t rex, int s1, int s3, int s4);