experimental optimizer for float ops

amxmodx/CPlugin.cpp

@@ -288,7 +288,7 @@ static cell AMX_NATIVE_CALL invalid_native(AMX *amx, cell *params)
 	}
 
 	char name[sNAMEMAX + 1];
-	int native = amx->usertags[UT_NATIVE];
+	int native = reinterpret_cast<int>(amx->usertags[UT_NATIVE]);
 	int err = amx_GetNative(amx, native, name);
 
 	if (err != AMX_ERR_NONE)

amxmodx/amx.cpp

@@ -46,6 +46,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <math.h>
 #include "osdefs.h"
 #if defined LINUX || defined __FreeBSD__ || defined __OpenBSD__
   #include <sclinux.h>
@@ -265,6 +266,12 @@ typedef enum {
   OP_SYSREQ_D,
   OP_SYMTAG,  /* obsolete */
   OP_BREAK,
+  OP_FLOAT_MUL,
+  OP_FLOAT_DIV,
+  OP_FLOAT_ADD,
+  OP_FLOAT_SUB,
+  OP_FLOAT_TO,
+  OP_FLOAT_ROUND,
   /* ----- */
   OP_NUM_OPCODES
 } OPCODE;
@@ -444,7 +451,7 @@ int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params)
   /* As of AMX Mod X 1.56, we don't patch sysreq.c to sysreq.d anymore.
    * Otherwise, we'd have no way of knowing the last native to be used.
    */
-  amx->usertags[UT_NATIVE] = (long)index;
+  amx->usertags[UT_NATIVE] = (void *)index;
 
   /* Note:
    *   params[0] == number of bytes for the additional parameters passed to the native function
@@ -487,6 +494,7 @@ static int amx_BrowseRelocate(AMX *amx)
   cell cip;
   long codesize;
   OPCODE op;
+  BROWSEHOOK hook = NULL;
   #if defined __GNUC__ || defined ASM32 || defined JIT
     cell *opcode_list;
   #endif
@@ -502,6 +510,7 @@ static int amx_BrowseRelocate(AMX *amx)
   code=amx->base+(int)hdr->cod;
   codesize=hdr->dat - hdr->cod;
   amx->flags|=AMX_FLAG_BROWSE;
+  hook = (BROWSEHOOK)amx->usertags[UT_BROWSEHOOK];
 
   /* sanity checks */
   assert(OP_PUSH_PRI==36);
@@ -607,11 +616,22 @@ static int amx_BrowseRelocate(AMX *amx)
     case OP_FILL:
     case OP_HALT:
     case OP_BOUNDS:
-    case OP_SYSREQ_C:
     case OP_PUSHADDR:
     case OP_SYSREQ_D:
       cip+=sizeof(cell);
       break;
+    case OP_SYSREQ_C:
+		{
+			if (hook)
+#if defined __GNUC__ || defined ASM32 || defined JIT
+				hook(amx, opcode_list, &cip);
+#else
+				hook(amx, NULL, &cip);
+#endif
+			else
+				cip+=sizeof(cell);
+			break;
+		}
 
     case OP_LOAD_I:     /* instructions without parameters */
     case OP_STOR_I:
@@ -672,6 +692,12 @@ static int amx_BrowseRelocate(AMX *amx)
     case OP_SWAP_ALT:
     case OP_NOP:
     case OP_BREAK:
+    case OP_FLOAT_MUL:
+    case OP_FLOAT_DIV:
+    case OP_FLOAT_ADD:
+    case OP_FLOAT_SUB:
+    case OP_FLOAT_TO:
+    case OP_FLOAT_ROUND:
       break;
 
     case OP_CALL:       /* opcodes that need relocation */
@@ -799,6 +825,7 @@ static void expand(unsigned char *code, long codesize, long memsize)
 int AMXAPI amx_Init(AMX *amx, void *program)
 {
   AMX_HEADER *hdr;
+  BROWSEHOOK hook = NULL;
   #if (defined _Windows || defined LINUX || defined __FreeBSD__ || defined __OpenBSD__) && !defined AMX_NODYNALOAD
     char libname[sNAMEMAX+8];  /* +1 for '\0', +3 for 'amx' prefix, +4 for extension */
     #if defined _Windows
@@ -946,6 +973,9 @@ int AMXAPI amx_Init(AMX *amx,void *program)
   #endif
 
   /* relocate call and jump instructions */
+  hook = (BROWSEHOOK)amx->usertags[UT_BROWSEHOOK];
+  if (hook)
+	  hook(amx, NULL, NULL);
   amx_BrowseRelocate(amx);
 
   /* load any extension modules that the AMX refers to */
@@ -1259,27 +1289,22 @@ int AMXAPI amx_GetNative(AMX *amx, int index, char *funcname)
 
 int AMXAPI amx_FindNative(AMX *amx, const char *name, int *index)
 {
-  int first,last,mid,result;
+  int first,last,mid;
   char pname[sNAMEMAX+1];
 
   amx_NumNatives(amx, &last);
   last--;       /* last valid index is 1 less than the number of functions */
   first=0;
-  /* binary search */
+  /* normal search */
-  while (first<=last) {
+  for (mid=0; mid<=last; mid++)
-    mid=(first+last)/2;
+  {
     amx_GetNative(amx, mid, pname);
-    result=strcmp(pname,name);
+    if (strcmp(pname, name)==0)
-    if (result>0) {
+	{
-      last=mid-1;
-    } else if (result<0) {
-      first=mid+1;
-    } else {
       *index = mid;
       return AMX_ERR_NONE;
 	} /* if */
-  } /* while */
+  } /* for */
-  /* not found, set to an invalid index, so amx_Exec() will fail */
   *index=INT_MAX;
   return AMX_ERR_NOTFOUND;
 }
@@ -1492,37 +1517,11 @@ int AMXAPI amx_FindTagId(AMX *amx, cell tag_id, char *tagname)
 #if defined AMX_XXXUSERDATA
 int AMXAPI amx_GetUserData(AMX *amx, long tag, void **ptr)
 {
-  int index;
-
-  assert(amx!=NULL);
-  assert(tag!=0);
-  for (index=0; index<AMX_USERNUM && amx->usertags[index]!=tag; index++)
-    /* nothing */;
-  if (index>=AMX_USERNUM)
-    return AMX_ERR_USERDATA;
-  *ptr=amx->userdata[index];
   return AMX_ERR_NONE;
 }
 
 int AMXAPI amx_SetUserData(AMX *amx, long tag, void *ptr)
 {
-  int index;
-
-  assert(amx!=NULL);
-  assert(tag!=0);
-  /* try to find existing tag */
-  for (index=0; index<AMX_USERNUM && amx->usertags[index]!=tag; index++)
-    /* nothing */;
-  /* if not found, try to find empty tag */
-  if (index>=AMX_USERNUM)
-    for (index=0; index<AMX_USERNUM && amx->usertags[index]!=0; index++)
-      /* nothing */;
-  /* if still not found, quit with error */
-  if (index>=AMX_USERNUM)
-    return AMX_ERR_INDEX;
-  /* set the tag and the value */
-  amx->usertags[index]=tag;
-  amx->userdata[index]=ptr;
   return AMX_ERR_NONE;
 }
 #endif /* AMX_XXXUSERDATA */
@@ -1764,13 +1763,15 @@ static const void * const amx_opcodelist[] = {
         &&op_file,      &&op_line,      &&op_symbol,    &&op_srange,
         &&op_jump_pri,  &&op_switch,    &&op_casetbl,   &&op_swap_pri,
         &&op_swap_alt,  &&op_pushaddr,  &&op_nop,       &&op_sysreq_d,
-        &&op_symtag,    &&op_break };
+        &&op_symtag,    &&op_break,     &&op_float_mul, &&op_float_div,
+		&&op_float_add, &&op_float_sub, &&op_float_to,  &&op_float_round};
   AMX_HEADER *hdr;
   AMX_FUNCSTUB *func;
   unsigned char *code, *data;
   cell pri,alt,stk,frm,hea;
   cell reset_stk, reset_hea, *cip;
-  cell offs;
+  cell offs, offs2;
+  REAL fnum;
   ucell codesize;
   int num,i;
 
@@ -2616,6 +2617,47 @@ static const void * const amx_opcodelist[] = {
     NEXT(cip);
   op_nop:
     NEXT(cip);
+  op_float_mul:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+    fnum = amx_ctof(offs) * amx_ctof(offs2);
+    pri = amx_ftoc(fnum);
+    NEXT(cip);
+  op_float_add:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+    fnum = amx_ctof(offs) + amx_ctof(offs2);
+    pri = amx_ftoc(fnum);
+    NEXT(cip);
+  op_float_sub:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+    fnum = amx_ctof(offs) - amx_ctof(offs2);
+    pri = amx_ftoc(fnum);
+    NEXT(cip);
+  op_float_div:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+    fnum = amx_ctof(offs) / amx_ctof(offs2);
+    pri = amx_ftoc(fnum);
+    NEXT(cip);
+  op_float_to:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    fnum = (REAL)offs;
+    pri = amx_ftoc(fnum);
+    NEXT(cip);
+  op_float_round:
+    offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+    offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+    fnum = amx_ctof(offs);
+    if (!offs2)
+       fnum = floor(fnum + 0.5);
+	else  if (offs2 == 1)
+       fnum = floor(fnum);
+	else
+       fnum = ceil(fnum);
+    pri = (cell)fnum;
+    NEXT(cip);
 op_break:
     if (amx->debug!=NULL) {
       /* store status */
@@ -2700,7 +2742,8 @@ int AMXAPI amx_Exec(AMX *amx, cell *retval, int index)
     cell  parms[9];     /* registers and parameters for assembler AMX */
   #else
     OPCODE op;
-    cell offs;
+    cell offs, offs2;
+	REAL fnum;
     int num;
   #endif
   assert(amx!=NULL);
@@ -3590,6 +3633,47 @@ int AMXAPI amx_Exec(AMX *amx, cell *retval, int index)
       PUSH(frm+offs);
       break;
     case OP_NOP:
+      break;
+	case OP_FLOAT_MUL:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+      fnum = amx_ctof(offs) * amx_ctof(offs2);
+      pri = amx_ftoc(fnum);
+	  break;
+	case OP_FLOAT_ADD:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+      fnum = amx_ctof(offs) + amx_ctof(offs2);
+      pri = amx_ftoc(fnum);
+	  break;
+	case OP_FLOAT_SUB:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+      fnum = amx_ctof(offs) - amx_ctof(offs2);
+      pri = amx_ftoc(fnum);
+	  break;
+	case OP_FLOAT_DIV:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+      fnum = amx_ctof(offs) / amx_ctof(offs2);
+      pri = amx_ftoc(fnum);
+	  break;
+	case OP_FLOAT_TO:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      fnum = (float)offs;
+      pri = amx_ftoc(fnum);
+      break;
+    case OP_FLOAT_ROUND:
+      offs = *(cell *)(data + (int)stk + sizeof(cell)*1);
+      offs2 = *(cell *)(data + (int)stk + sizeof(cell)*2);
+      fnum = amx_ctof(offs);
+      if (!offs2)
+         fnum = (REAL)floor(fnum + 0.5);
+	  else  if (offs2 == 1)
+         fnum = floor(fnum);
+	  else
+         fnum = ceil(fnum);
+      pri = (cell)fnum;
       break;
     case OP_BREAK:
       assert((amx->flags & AMX_FLAG_BROWSE)==0);

amxmodx/amx.h

@@ -231,7 +231,7 @@ typedef struct tagAMX {
   cell stp              PACKED; /* top of the stack: relative to base + amxhdr->dat */
   int flags             PACKED; /* current status, see amx_Flags() */
   /* user data */
-  long usertags[AMX_USERNUM] PACKED;
+  void _FAR *usertags[AMX_USERNUM] PACKED;
   //okay userdata[3] in AMX Mod X is for the CPlugin * pointer
   //we're also gonna set userdata[2] to a special debug structure
   //lastly, userdata[1] is for opcode_list from amx_BrowseRelocate
@@ -334,6 +334,10 @@ enum {
 #define UD_OPCODELIST	1
 #define	UD_HANDLER		0
 #define	UT_NATIVE		3
+#define UT_OPTIMIZER	2
+#define UT_BROWSEHOOK	1
+
+typedef void (*BROWSEHOOK)(AMX *amx, cell *oplist, cell *cip);
 
 /* for native functions that use floating point parameters, the following
  * two macros are convenient for casting a "cell" into a "float" type _without_

amxmodx/amxdbg.cpp

@@ -267,6 +267,28 @@ int AMXAPI dbg_LookupLine(AMX_DBG *amxdbg, ucell address, long *line)
   return AMX_ERR_NONE;
 }
 
+void AMXAPI dbg_DumpFuncs(AMX_DBG *amxdbg, const char *file)
+{
+	int index;
+	FILE *fp = fopen(file, "at");
+	
+	if (!fp)
+		return;
+
+	for (index=0; index<amxdbg->hdr->symbols; index++)
+	{
+		if (amxdbg->symboltbl[index]->ident == iFUNCTN)
+		{
+			fprintf(fp, "[%s] --> (%d-%d)", 
+				amxdbg->symboltbl[index]->name,
+				amxdbg->symboltbl[index]->codestart,
+				amxdbg->symboltbl[index]->codeend);
+		}
+	}
+
+	fclose(fp);
+}
+
 int AMXAPI dbg_LookupFunction(AMX_DBG *amxdbg, ucell address, const char **funcname)
 {
   /* dbg_LookupFunction() finds the function a code address is in. It can be

amxmodx/amxexecn.asm

@@ -56,6 +56,8 @@
 ;
 ;History (list of changes)
 ;-------------------------
+; 10 february 2006 by David Anderson
+;       Addition of float opcodes
 ; 17 february 2005  by Thiadmer Riemersms
 ;       Addition of the BREAK opcode, removal of the older debugging opcode table.
 ;  6 march 2004  by Thiadmer Riemersma
@@ -1406,6 +1408,83 @@ OP_NOP:
         add     esi,4
         GO_ON
         
+OP_FLOAT_MUL:
+		add		esi,4
+		fld		dword [edi+ecx+4]
+		fmul	dword [edi+ecx+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+		GO_ON
+		
+OP_FLOAT_DIV:
+		add		esi,4
+		fld		dword [edi+ecx+4]
+		fdiv	dword [edi+ecx+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+		GO_ON
+		
+OP_FLOAT_ADD:
+		add		esi,4
+		fld		dword [edi+ecx+4]
+		fadd	dword [edi+ecx+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+		GO_ON
+		
+OP_FLOAT_SUB:
+		add		esi,4
+		fld		dword [edi+ecx+4]
+		fsub	dword [edi+ecx+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+		GO_ON
+		
+OP_FLOAT_TO:
+		add	    esi,4
+		fild    dword [edi+ecx+4]
+		push    0
+		fstp    dword [esp]
+		pop	    eax
+		GO_ON
+		
+OP_FLOAT_ROUND:
+		add	    esi,4
+		;get the float control word
+		push    0
+		mov     ebp,esp
+		fstcw   [ebp]
+		mov		eax,[ebp]
+		push    eax
+		;clear the top bits
+		xor     ah,ah
+		;get the control method
+		push    edx
+		mov     edx,[edi+ecx+8]
+		and     edx,3	;sanity check
+		shl     edx,2	;shift it to right position
+		;set the bits
+		or      ah,dl	;set bits 15,14 of FCW to rounding method
+		or      ah,3	;set precision to 64bit
+		mov     [ebp], eax
+		fldcw   [ebp]
+		;calculate
+		push    0
+		fld     dword [edi+ecx+4]
+		frndint
+		fistp   dword [esp]
+		pop     eax
+		pop     edx
+		;restore bits
+		pop     ebp
+		mov     [esp], ebp
+		fldcw   [esp]
+		pop      ebp
+		GO_ON
 
 OP_BREAK:
         mov     ebp,amx         ; get amx into ebp
@@ -1642,4 +1721,9 @@ _amx_opcodelist DD OP_INVALID
         DD      OP_SYSREQ_D
         DD      OP_SYMTAG
         DD      OP_BREAK
-
+        DD		OP_FLOAT_MUL
+        DD		OP_FLOAT_DIV
+		DD		OP_FLOAT_ADD
+		DD		OP_FLOAT_SUB
+		DD		OP_FLOAT_TO
+		DD		OP_FLOAT_ROUND

amxmodx/amxjitsn.asm

@@ -1882,7 +1882,7 @@ OP_BREAK:
         jae     code_gen_done
         jmp     DWORD [ebx]             ; go on with the next opcode
 %else
-        GO_ON   j_break, OP_INVALID
+        GO_ON   j_break, OP_FLOAT_MUL
     j_break:
         mov     ebp,amx
         cmp     DWORD [ebp+_debug], 0
@@ -1891,6 +1891,90 @@ OP_BREAK:
     CHECKCODESIZE j_break
 %endif
 
+OP_FLOAT_MUL:
+		GO_ON	j_float_mul, OP_FLOAT_DIV
+	j_float_mul:
+		fld		dword [esi+4]
+		fmul	dword [esi+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+	CHECKCODESIZE j_float_mul
+	
+OP_FLOAT_DIV:
+		GO_ON	j_float_div, OP_FLOAT_ADD
+	j_float_div:
+		fld		dword [esi+4]
+		fdiv	dword [esi+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+	CHECKCODESIZE j_float_div
+	
+OP_FLOAT_ADD:
+		GO_ON	j_float_add, OP_FLOAT_SUB
+	j_float_add:
+		fld		dword [esi+4]
+		fadd	dword [esi+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+	CHECKCODESIZE j_float_add
+	
+OP_FLOAT_SUB:
+		GO_ON	j_float_sub, OP_FLOAT_TO
+	j_float_sub:
+		fld		dword [esi+4]
+		fsub	dword [esi+8]
+		push	dword 0
+		fstp	dword [esp]
+		pop		eax
+	CHECKCODESIZE j_float_sub
+	
+OP_FLOAT_TO:
+		GO_ON   j_float_to, OP_FLOAT_ROUND
+	j_float_to:
+		fild    dword [esi+4]
+		push    0
+		fstp    dword [esp]
+		pop	    eax
+	CHECKCODESIZE j_float_to
+	
+OP_FLOAT_ROUND:
+		GO_ON   j_float_round, OP_INVALID
+	j_float_round:
+		;get the float control word
+		push    0
+		mov     ebp,esp
+		fstcw   [ebp]
+		mov		eax,[ebp]
+		push    eax
+		;clear the top bits
+		xor     ah,ah
+		;get the control method
+		push    edx
+		mov     edx,[esi+8]
+		and     edx,3	;sanity check
+		shl     edx,2	;shift it to right position
+		;set the bits
+		or      ah,dl	;set bits 15,14 of FCW to rounding method
+		or      ah,3	;set precision to 64bit
+		mov     [ebp], eax
+		fldcw   [ebp]
+		;calculate
+		push    0
+		fld     dword [esi+4]
+		frndint
+		fistp   dword [esp]
+		pop     eax
+		pop     edx
+		;restore bits
+		pop     ebp
+		mov     [esp], ebp
+		fldcw   [esp]
+		pop      ebp
+	CHECKCODESIZE j_float_round
+
 OP_INVALID:                     ; break from the compiler with an error code
         mov     eax,AMX_ERR_INVINSTR
         pop     esi
@@ -2461,5 +2545,11 @@ _amx_opcodelist_jit:
         DD      OP_SYSREQ_D     ; TR
         DD      OP_SYMTAG       ; TR
         DD      OP_BREAK        ; TR
+        DD		OP_FLOAT_MUL	; DA
+        DD		OP_FLOAT_DIV	; DA
+        DD		OP_FLOAT_ADD	; DA
+        DD		OP_FLOAT_SUB	; DA
+        DD		OP_FLOAT_TO		; DA
+        DD		OP_FLOAT_ROUND	; DA
 
 END

amxmodx/debugger.cpp

@@ -442,7 +442,7 @@ int Debugger::FormatError(char *buffer, size_t maxLength)
 			num = (int)*p_cip;
 		}*/
 		//New code only requires this...
-		num = m_pAmx->usertags[UT_NATIVE];
+		num = (int)m_pAmx->usertags[UT_NATIVE];
 		amx_err = amx_GetNative(m_pAmx, num, native_name);
 		/*if (num)
 			amx_err = amx_GetNative(m_pAmx, (int)*p_cip, native_name);

amxmodx/modules.cpp

@@ -44,6 +44,7 @@
 #include "newmenus.h"
 #include "natives.h"
 #include "debugger.h"
+#include "optimizer.h"
 
 CList<CModule, const char*> g_modules;
 CList<CScript, AMX*> g_loadedscripts;
@@ -100,6 +101,8 @@ void free_amxmemory(void **ptr)
 	*ptr = 0;
 }
 
+void AMXAPI dbg_DumpFuncs(AMX_DBG *amxdbg, const char *file);
+
 int load_amxscript(AMX *amx, void **program, const char *filename, char error[64], int debug)
 {
 	*error = 0;
@@ -197,6 +200,8 @@ int load_amxscript(AMX *amx, void **program, const char *filename, char error[64
 				return (amx->error = AMX_ERR_INIT);
 			}
 
+			dbg_DumpFuncs(pDbg, "c:\\test.txt");
+
 			amx->flags |= AMX_FLAG_DEBUG;
 		} else {
 			sprintf(error, "Plugin not compiled with debug option");
@@ -209,6 +214,8 @@ int load_amxscript(AMX *amx, void **program, const char *filename, char error[64
 #endif
 	}
 
+	SetupOptimizer(amx);
+
 	if ((err = amx_Init(amx, *program)) != AMX_ERR_NONE)
 	{
 		if (pDbg)

amxmodx/msvc/amxmodx_mm.def

@@ -1,6 +0,0 @@
-LIBRARY amxx_mm
-EXPORTS
-	GiveFnptrsToDll			@1
-	
-SECTIONS
-	.data READ WRITE

amxmodx/msvc/amxmodx_mm.vcproj

@@ -686,6 +686,9 @@
 			<File
 				RelativePath="..\newmenus.cpp">
 			</File>
+			<File
+				RelativePath="..\optimizer.cpp">
+			</File>
 			<File
 				RelativePath="..\power.cpp">
 			</File>
@@ -835,6 +838,9 @@
 			<File
 				RelativePath="..\newmenus.h">
 			</File>
+			<File
+				RelativePath="..\optimizer.h">
+			</File>
 			<File
 				RelativePath="..\resource.h">
 			</File>

amxmodx/optimizer.cpp

@@ -0,0 +1,100 @@
+#include <string.h>
+#include "optimizer.h"
+
+#define OP_SYSREQ_C		123
+#define OP_NOP			134
+#define OP_FLOAT_MUL	138
+#define OP_FLOAT_DIV	139
+#define OP_FLOAT_ADD	140
+#define OP_FLOAT_SUB	141
+#define OP_FLOAT_TO		142
+#define OP_FLOAT_ROUND	143
+
+cell op_trans_table[N_Total_FloatOps] =
+{
+	OP_FLOAT_MUL,
+	OP_FLOAT_DIV,
+	OP_FLOAT_ADD,
+	OP_FLOAT_SUB,
+	OP_FLOAT_TO,
+	OP_FLOAT_ROUND
+};
+
+void OnBrowseRelocate(AMX *amx, cell *oplist, cell *cip)
+{
+	char *codeptr = (char *)amx->base + (long)(((AMX_HEADER *)amx->base)->cod);
+
+	//jump to the parameter;
+	codeptr += *cip;
+	
+	int native = -1;
+	cell n_offs = *(cell *)codeptr;
+	optimizer_s *opt = (optimizer_s *)amx->usertags[UT_OPTIMIZER];
+    for (int i=0; i<N_Total_FloatOps; i++)
+	{
+		if (opt->natives[i] == n_offs)
+		{
+			native = i;
+			break;
+		}
+	}
+
+	if (native != -1)
+	{
+		//we're patching this:
+		// 0x7B 0x??   SYSREQ.C float???
+		//with:
+		// 0x8A        FLOAT.MUL
+		// 0x86	       NOP
+		cell new_opcodes[2];
+		new_opcodes[0] = op_trans_table[native];
+		new_opcodes[1] = OP_NOP;
+		codeptr -= sizeof(cell);
+#if defined __GNUC__ || defined ASM32 || defined JIT
+		*(cell *)codeptr = oplist[new_opcodes[0]];
+		*(cell *)(codeptr + sizeof(cell)) = oplist[new_opcodes[1]];
+#else
+		*(cell *)codeptr = new_opcodes[0];
+		*(cell *)(codeptr + sizeof(cell)) = new_opcodes[1];
+#endif
+	}
+
+	*cip += sizeof(cell);
+	
+	return;
+}
+
+#define FIND_NATIVE(name, bind) \
+	if (amx_FindNative(amx, name, &index) != AMX_ERR_NOTFOUND) \
+		opt->natives[bind] = index;
+
+void _Setup_Optimizer_Stage2(AMX *amx, cell *oplist, cell *cip)
+{
+	int index;
+
+	amx->usertags[UT_BROWSEHOOK] = (void *)OnBrowseRelocate;
+
+	optimizer_s *opt = new optimizer_s;
+	
+	for (int i=0; i<N_Total_FloatOps; i++)
+		opt->natives[i] = -1;
+
+	amx->usertags[UT_OPTIMIZER] = (void *)opt;
+	
+	FIND_NATIVE("floatmul", N_Float_Mul);
+	FIND_NATIVE("floatdiv", N_Float_Div);
+	FIND_NATIVE("floatadd", N_Float_Add);
+	FIND_NATIVE("floatsub", N_Float_Sub);
+	FIND_NATIVE("float", N_Float_To);
+	FIND_NATIVE("floatround", N_Float_Round);
+	//we don't do these yet because of radix stuff >:\
+	//FIND_NATIVE("floatsin", N_Float_Sin);
+	//FIND_NATIVE("floatcos", N_Float_Cos);
+	//FIND_NATIVE("floattan", N_Float_Tan);
+}
+
+void SetupOptimizer(AMX *amx)
+{
+	amx->usertags[UT_BROWSEHOOK] = (void *)_Setup_Optimizer_Stage2;
+}
+

amxmodx/optimizer.h

@@ -0,0 +1,24 @@
+#ifndef _INCLUDE_AMXMODX_OPTIMIZER_H
+#define _INCLUDE_AMXMODX_OPTIMIZER_H
+
+#include "amx.h"
+
+enum
+{
+	N_Float_Mul=0,
+	N_Float_Div,
+	N_Float_Add,
+	N_Float_Sub,
+	N_Float_To,
+	N_Float_Round,
+	N_Total_FloatOps
+};
+
+struct optimizer_s
+{
+	int natives[N_Total_FloatOps];
+};
+
+void SetupOptimizer(AMX *amx);
+
+#endif //_INCLUDE_AMXMODX_OPTIMIZER_H