experimental optimizer for float ops

2006-02-10 15:43:27 +00:00
parent b527efde41
commit dcaf3066bf
14 changed files with 474 additions and 59 deletions
--- a/amxmodx/optimizer.cpp
+++ b/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;
+}
+