diff --git a/Docs/src/config.but b/Docs/src/config.but
index 35bdfd93..e00c03c5 100644
--- a/Docs/src/config.but
+++ b/Docs/src/config.but
@@ -12,6 +12,8 @@
 
 \define{NsisFuncReqU} This function is only available when building a \R{intro-unicode}{Unicode installer}.
 
+\define{NsisFuncReq64} This function is only available when building a 64-bit installer.
+
 \define{NsisACPcp} system default ANSI codepage (ACP)
 
 \define{NsisInputCharset} ACP|OEM|CP#|UTF8|UTF16<LE|BE>
diff --git a/Docs/src/flowcontrol.but b/Docs/src/flowcontrol.but
index 5c48a144..07a6b039 100644
--- a/Docs/src/flowcontrol.but
+++ b/Docs/src/flowcontrol.but
@@ -185,6 +185,34 @@ Compares two integers val1 and val2. If val1 and val2 are equal, Gotos jump_if_e
 
 Same as \R{intcmp}{IntCmp}, but treats the values as unsigned integers.
 
+\S2{int64cmp} Int64Cmp
+
+\c val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]
+
+Same as \R{intcmp}{IntCmp}, but treats the values as 64-bit integers.
+
+\NsisFuncReq64
+
+\S2{int64cmpu} Int64CmpU
+
+\c val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]
+
+Same as \R{intcmp}{IntCmp}, but treats the values as 64-bit unsigned integers.
+
+\NsisFuncReq64
+
+\S2{intptrcmp} IntPtrCmp
+
+\c val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]
+
+Same as \R{intcmp}{IntCmp}, but treats the values as pointer sized integers.
+
+\S2{intptrcmpu} IntPtrCmpU
+
+\c val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]
+
+Same as \R{intcmp}{IntCmp}, but treats the values as pointer sized unsigned integers.
+
 \S2{messagebox} MessageBox
 
 \c mb_option_list messagebox_text [/SD return] [return_check jumpto [return_check_2 jumpto_2]]
diff --git a/Docs/src/history.but b/Docs/src/history.but
index bd453a80..522feccb 100644
--- a/Docs/src/history.but
+++ b/Docs/src/history.but
@@ -20,6 +20,8 @@ Released on ??? ??rd, 20??
 
 \S2{} Minor Changes
 
+\b Added \R{intptrcmp}{IntPtrCmp}, IntPtrCmpU, Int64Cmp and Int64CmpU
+
 \b Added \R{intptrop}{IntPtrOp}
 
 \b Added IntOp and System::Int64Op >>> operator
diff --git a/Include/Util.nsh b/Include/Util.nsh
index 620a4410..4e905c0c 100644
--- a/Include/Util.nsh
+++ b/Include/Util.nsh
@@ -46,11 +46,7 @@
 !define Int64Op '!insertmacro Int64Op '
 !define IntPtrOp '!insertmacro IntPtrOp '
 !macro Int32Op r a o b
-!if ${NSIS_PTR_SIZE} <= 4
-  IntOp `${r}` `${a}` `${o}` ${b}
-!else
-  !error "Int32Op not implemented"
-!endif
+IntOp `${r}` `${a}` `${o}` ${b}
 !macroend
 !macro Int64Op r a o b
 !echo "Int64Op ${r}=${a}${o}${b}"
@@ -67,13 +63,10 @@ IntPtrOp `${r}` `${a}` `${o}` `${b}`
 !define Int64Cmp '!insertmacro Int64Cmp '
 !define IntPtrCmp '!insertmacro IntPtrCmp '
 !macro Int32Cmp a b jeek jles jgtr
-!if ${NSIS_PTR_SIZE} <= 4
-  IntCmp `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!else
-  !error "Int32Cmp not implemented"
-!endif
+IntCmp `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
 !macroend
 !macro Int64Cmp a b jeek jles jgtr
+!if ${NSIS_PTR_SIZE} <= 4
 !ifmacrondef _LOGICLIB_TEMP
 !include LogicLib.nsh
 !endif
@@ -82,24 +75,19 @@ IntPtrOp `${r}` `${a}` `${o}` `${b}`
 ${IfThen} ${a} L= ${b} ${|} Goto ${jeek} ${|}
 !insertmacro _L< ${a} ${b} `${jles}` `${jgtr}`
 !verbose pop
+!else
+Int64Cmp `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
+!endif
 !macroend
 !macro IntPtrCmp a b jeek jles jgtr
-!if ${NSIS_PTR_SIZE} <= 4
-  ${Int32Cmp} `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!else
-  ${Int64Cmp} `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!endif
+IntPtrCmp `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
 !macroend
 
 !define Int32CmpU '!insertmacro Int32CmpU '
 !define Int64CmpU '!insertmacro Int64CmpU '
 !define IntPtrCmpU '!insertmacro IntPtrCmpU '
 !macro Int32CmpU a b jeek jles jgtr
-!if ${NSIS_PTR_SIZE} <= 4
-  IntCmpU `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!else
-  !error "Int32CmpU not implemented"
-!endif
+IntCmpU `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
 !macroend
 !macro Int64CmpUHelper
 ; This macro performs "$_LOGICLIB_TEMP = a < b ? -1 : a > b ? 1 : 0" but System::Int64Op does not support unsigned operations so we have to perform multiple steps
@@ -148,6 +136,7 @@ Pop $1
 Pop $2
 !macroend
 !macro Int64CmpU a b jeek jles jgtr
+!if ${NSIS_PTR_SIZE} <= 4
 !echo "Int64CmpU ${a}:${b} =${jeek}, <${jles}, >${jgtr}"
 !verbose push 2
 Push `${a}`
@@ -155,13 +144,12 @@ Push `${b}`
 !insertmacro CallArtificialFunction Int64CmpUHelper
 IntCmp $_LOGICLIB_TEMP 0 `${jeek}` `${jles}` `${jgtr}`
 !verbose pop
+!else
+Int64CmpU `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
+!endif
 !macroend
 !macro IntPtrCmpU a b jeek jles jgtr
-!if ${NSIS_PTR_SIZE} <= 4
-  ${Int32CmpU} `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!else
-  ${Int64CmpU} `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
-!endif
+IntPtrCmpU `${a}` `${b}` `${jeek}` `${jles}` `${jgtr}`
 !macroend
 
 
diff --git a/Source/exehead/exec.c b/Source/exehead/exec.c
index 183dadc2..1e0c27bb 100644
--- a/Source/exehead/exec.c
+++ b/Source/exehead/exec.c
@@ -683,18 +683,27 @@ static int NSISCALL ExecuteEntry(entry *entry_)
 #ifdef NSIS_SUPPORT_INTOPTS
     case EW_INTCMP:
       {
-        int v,v2;
-        v=GetIntFromParm(0);
-        v2=GetIntFromParm(1);
-        if (!parm5) {
-          // signed
-          if (v<v2) return parm3;
-          if (v>v2) return parm4;
+        UINT supp64=sizeof(void*) > 4, opu=supp64 ? (BYTE) parm5 : parm5, op64=supp64 ? (INT16) parm5 < 0 : FALSE;
+        INT_PTR v=GetIntPtrFromParm(0), v2=GetIntPtrFromParm(1); // Note: This needs to be INT64 if supp64 is ever set to true for 32-bit builds!
+        if (!opu) { // signed:
+          if (op64) {
+            if ((INT64)v < (INT64)v2) return parm3;
+            if ((INT64)v > (INT64)v2) return parm4;
+          }
+          else {
+            if ((signed int)v < (signed int)v2) return parm3;
+            if ((signed int)v > (signed int)v2) return parm4;
+          }
         }
-        else {
-          // unsigned
-          if ((unsigned int)v<(unsigned int)v2) return parm3;
-          if ((unsigned int)v>(unsigned int)v2) return parm4;
+        else { // unsigned:
+          if (op64) {
+            if ((UINT64)v < (UINT64)v2) return parm3;
+            if ((UINT64)v > (UINT64)v2) return parm4;
+          }
+          else {
+            if ((unsigned int)v < (unsigned int)v2) return parm3;
+            if ((unsigned int)v > (unsigned int)v2) return parm4;
+          }
         }
       }
     return parm2;
diff --git a/Source/exehead/fileform.h b/Source/exehead/fileform.h
index 7e748845..22f09888 100644
--- a/Source/exehead/fileform.h
+++ b/Source/exehead/fileform.h
@@ -96,7 +96,7 @@ enum
   EW_READENVSTR,        // ReadEnvStr/ExpandEnvStrings: 3 [output, string_with_env_variables, IsRead]
 #endif
 #ifdef NSIS_SUPPORT_INTOPTS
-  EW_INTCMP,            // IntCmp: 6 [val1, val2, equal, val1<val2, val1>val2, unsigned?]
+  EW_INTCMP,            // IntCmp: 6 [val1, val2, equal, val1<val2, val1>val2, flags] where flags: bit 0x01 is set for unsigned operations and bit 0x8000 is set for 64-bit operations
   EW_INTOP,             // IntOp: 4 [output, input1, input2, op] where op: 0=add, 1=sub, 2=mul, 3=div, 4=bor, 5=band, 6=bxor, 7=bnot input1, 8=lor, 9=land 10=mod, 11=shl, 12=sar, 13=shr (bneg is implemented with bxor in compiler)
   EW_INTFMT,            // IntFmt: [output, format, input]
 #endif
diff --git a/Source/script.cpp b/Source/script.cpp
index 87ce291d..183e79ab 100644
--- a/Source/script.cpp
+++ b/Source/script.cpp
@@ -87,6 +87,15 @@ static LANGID ParseLangId(const TCHAR*Str)
   return _T('0') == p[0] && _T('x') == (p[1]|32) ? LineParser::parse_int(Str) : _ttoi(Str);
 }
 
+LANGID CEXEBuild::ParseLangIdParameter(const LineParser&line, int token)
+{
+  int succ, lid = line.gettoken_int(token, &succ);
+  if (!lid) lid = last_used_lang;
+  if (!succ)
+    warning_fl(DW_BAD_LANGID, _T("\"%") NPRIs _T("\" is not a valid language id, using language id %u!"), line.gettoken_str(token), lid);
+  return lid;
+}
+
 int CEXEBuild::process_script(NIStream&Strm, const TCHAR *filename)
 {
   NStreamLineReader linereader(Strm);
@@ -4169,23 +4178,24 @@ int CEXEBuild::doCommand(int which_token, LineParser &line)
       ent.offsets[2]=add_string(line.gettoken_str(3));
       SCRIPT_MSG(_T("IntFmt: %") NPRIs _T("->%") NPRIs _T(" (fmt:%") NPRIs _T(")\n"),line.gettoken_str(3),line.gettoken_str(1),line.gettoken_str(2));
     return add_entry(&ent);
-    case TOK_INTCMP:
-    case TOK_INTCMPU:
-      ent.which=EW_INTCMP;
-      ent.offsets[0]=add_string(line.gettoken_str(1));
-      ent.offsets[1]=add_string(line.gettoken_str(2));
-      ent.offsets[5]=which_token == TOK_INTCMPU;
-      if (process_jump(line,3,&ent.offsets[2]) ||
-          process_jump(line,4,&ent.offsets[3]) ||
-          process_jump(line,5,&ent.offsets[4]))  PRINTHELP()
-      SCRIPT_MSG(_T("%") NPRIs _T(" %") NPRIs _T(":%") NPRIs _T(" equal=%") NPRIs _T(", < %") NPRIs _T(", > %") NPRIs _T("\n"),line.gettoken_str(0),
-        line.gettoken_str(1),line.gettoken_str(2), line.gettoken_str(3),line.gettoken_str(4),line.gettoken_str(5));
-    return add_entry(&ent);
+    case TOK_INTCMP: case TOK_INTCMPU: case TOK_INT64CMP: case TOK_INT64CMPU: case TOK_INTPTRCMP: case TOK_INTPTRCMPU:
+      {
+        int t64 = is_target_64bit(), o32 = TOK_INTCMP == which_token || TOK_INTCMPU == which_token, o64 = TOK_INT64CMP == which_token || TOK_INT64CMPU == which_token;
+        if (!t64 && o64) return (ERROR_MSG(_T("Instruction only supported by 64-bit targets!\n")), PS_ERROR);
+        ent.which=EW_INTCMP;
+        ent.offsets[0]=add_string(line.gettoken_str(1));
+        ent.offsets[1]=add_string(line.gettoken_str(2));
+        ent.offsets[5]=(which_token == TOK_INTCMPU || which_token == TOK_INT64CMPU || which_token == TOK_INTPTRCMPU) | (t64 && !o32 ? 0x8000 : 0);
+        if (process_jump(line,3,&ent.offsets[2]) | process_jump(line,4,&ent.offsets[3]) | process_jump(line,5,&ent.offsets[4]))
+          PRINTHELP()
+        SCRIPT_MSG(_T("%") NPRIs _T(" %") NPRIs _T(":%") NPRIs _T(" equal=%") NPRIs _T(", < %") NPRIs _T(", > %") NPRIs _T("\n"),line.gettoken_str(0),
+          line.gettoken_str(1),line.gettoken_str(2), line.gettoken_str(3),line.gettoken_str(4),line.gettoken_str(5));
+        return add_entry(&ent);
+      }
 #else
-    case TOK_INTOP:
-    case TOK_INTCMP:
+    case TOK_INTOP: case TOK_INTPTROP:
+    case TOK_INTCMP: case TOK_INTCMPU: case TOK_INT64CMP: case TOK_INT64CMPU: case TOK_INTPTRCMP: case TOK_INTPTRCMPU:
     case TOK_INTFMT:
-    case TOK_INTCMPU:
       ERROR_MSG(_T("Error: %") NPRIs _T(" specified, NSIS_SUPPORT_INTOPTS not defined.\n"),  line.gettoken_str(0));
       return PS_ERROR;
 #endif //~ NSIS_SUPPORT_INTOPTS
@@ -5427,12 +5437,3 @@ int CEXEBuild::do_add_file_create_dir(const tstring& local_dir, const tstring& d
   return PS_OK;
 }
 #endif
-
-LANGID CEXEBuild::ParseLangIdParameter(const LineParser&line, int token)
-{
-  int succ, lid = line.gettoken_int(token, &succ);
-  if (!lid) lid = last_used_lang;
-  if (!succ)
-    warning_fl(DW_BAD_LANGID, _T("\"%") NPRIs _T("\" is not a valid language id, using language id %u!"), line.gettoken_str(token), lid);
-  return lid;
-}
diff --git a/Source/tokens.cpp b/Source/tokens.cpp
index 3cf89a37..1e89779c 100644
--- a/Source/tokens.cpp
+++ b/Source/tokens.cpp
@@ -126,6 +126,10 @@ static tokenType tokenlist[TOK__LAST] =
 {TOK_INTPTROP,_T("IntPtrOp"),3,1,_T("$(user_var: result) val1 OP [val2]"),TP_CODE},
 {TOK_INTCMP,_T("IntCmp"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
 {TOK_INTCMPU,_T("IntCmpU"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
+{TOK_INT64CMP,_T("Int64Cmp"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
+{TOK_INT64CMPU,_T("Int64CmpU"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
+{TOK_INTPTRCMP,_T("IntPtrCmp"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
+{TOK_INTPTRCMPU,_T("IntPtrCmpU"),3,2,_T("val1 val2 jump_if_equal [jump_if_val1_less] [jump_if_val1_more]"),TP_CODE},
 {TOK_INTFMT,_T("IntFmt"),3,0,_T("$(user_var: output) format_string input"),TP_CODE},
 {TOK_ISWINDOW,_T("IsWindow"),2,1,_T("hwnd jump_if_window [jump_if_not_window]"),TP_CODE},
 {TOK_GOTO,_T("Goto"),1,0,_T("label"),TP_CODE},
diff --git a/Source/tokens.h b/Source/tokens.h
index 7549374c..370cd81a 100644
--- a/Source/tokens.h
+++ b/Source/tokens.h
@@ -241,6 +241,10 @@ enum
   TOK_INTPTROP,
   TOK_INTCMP,
   TOK_INTCMPU,
+  TOK_INT64CMP,
+  TOK_INT64CMPU,
+  TOK_INTPTRCMP,
+  TOK_INTPTRCMPU,
   TOK_INTFMT,
   TOK_ENUMREGKEY,
   TOK_ENUMREGVAL,