sourcepawn/vm/jit/x86/opcode_helpers.cpp
author David Anderson <dvander@alliedmods.net>
Tue Oct 17 05:50:59 2006 +0000 (2006-10-17)
changeset 124 34cf4180c72b
parent 121 db9e2bb7c9e6
child 125 802293b44233
permissions -rw-r--r--
added support for op.genarray.z opcode
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#include <limits.h>
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#include <string.h>
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#include "jit_x86.h"
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#include "opcode_helpers.h"
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#include "x86_macros.h"
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#define NUM_INFO_PARAMS	6
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jitoffs_t Write_Execute_Function(JitWriter *jit)
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{
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	/** 
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	 * The variables we're passed in:
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	 *  sp_context_t *ctx, uint32_t code_idx, cell_t *result
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	 */
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	/**
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	 * !NOTE!
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	 * Currently, we do not accept ctx->frm as the new frame pointer.
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	 * Instead, we copy the frame from the stack pointer.
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	 * This is because we do not support resuming or sleeping!
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	 */
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	//push ebp
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	//mov ebp, esp
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	IA32_Push_Reg(jit, REG_EBP);
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	IA32_Mov_Reg_Rm(jit, REG_EBP, REG_ESP, MOD_REG);
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	//push esi
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	//push edi
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	//push ebx
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	IA32_Push_Reg(jit, REG_ESI);
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	IA32_Push_Reg(jit, REG_EDI);
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	IA32_Push_Reg(jit, REG_EBX);
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	//sub esp, 4*n	- reserve info array
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	//mov esi, esp	- save info pointer
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	IA32_Sub_Rm_Imm8(jit, REG_ESP, 4*NUM_INFO_PARAMS, MOD_REG);
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	IA32_Mov_Reg_Rm(jit, AMX_REG_INFO, REG_ESP, MOD_REG);
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	/* Initial memory setup */
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	//mov eax, [ebp+16]		- get result pointer
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	//mov [esi+8], eax		- store into info pointer
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	//mov eax, [ebp+8]		- get context
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	//mov [esi+12], eax		- store context into info pointer
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	//mov ecx, [eax+<offs>]	- get heap pointer
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	//mov [esi+4], ecx		- store heap into info pointer
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	//mov ebp, [eax+<offs>]	- get data pointer
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, REG_EBP, 16);
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	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_EAX, AMX_INFO_RETVAL);
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, REG_EBP, 8);
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	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_EAX, AMX_INFO_CONTEXT);
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_ECX, REG_EAX, offsetof(sp_context_t, hp));
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	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_ECX, AMX_INFO_HEAP);
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_DAT, REG_EAX, offsetof(sp_context_t, data));
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	/* Frame setup */
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	//mov edi, [eax+<offs>]	- get stack pointer
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	//add edi, ebp			- relocate to data section
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	//mov ebx, edi			- copy sp to frm
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_STK, REG_EAX, offsetof(sp_context_t, sp));
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	IA32_Add_Rm_Reg(jit, AMX_REG_STK, AMX_REG_DAT, MOD_REG);
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	IA32_Mov_Reg_Rm(jit, AMX_REG_FRM, AMX_REG_STK, MOD_REG);
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	/* Info memory setup */
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	//mov ecx, [eax+<offs>] - copy memsize to temp var
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	//mov [esi+x], ecx		- store unrelocated
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	//add ecx, ebp			- relocate
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	//mov [esi+x], ecx		- store relocated
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_ECX, REG_EAX, offsetof(sp_context_t, memory));
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	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_ECX, AMX_INFO_STACKTOP_U);
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	IA32_Add_Reg_Rm(jit, AMX_REG_TMP, AMX_REG_DAT, MOD_REG);
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	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_ECX, AMX_INFO_STACKTOP);
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	/* Remaining needed vars */
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	//mov ecx, [esp+(4*(NUM_INFO_PARAMS+3))+12] - get code index (normally esp+12, but we have another array on the stack)
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	//add ecx, [eax+<offs>]   - add code base to index
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	IA32_Mov_Reg_Esp_Disp8(jit, REG_ECX, 12+(4*(NUM_INFO_PARAMS+3)));
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	IA32_Add_Reg_Rm_Disp8(jit, REG_ECX, REG_EAX, offsetof(sp_context_t, codebase));
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	/* by now, everything is set up, so we can call into the plugin */
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	//call ecx
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	IA32_Call_Reg(jit, REG_ECX);
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	/* if the code flow gets to here, there was a normal return */
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	//mov ecx, [esi+8]		- get retval pointer
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	//mov [ecx], eax		- store retval from PRI
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	//mov eax, SP_ERROR_NONE	- set no error
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_ECX, AMX_REG_INFO, AMX_INFO_RETVAL);
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	IA32_Mov_Rm_Reg(jit, REG_ECX, AMX_REG_PRI, MOD_MEM_REG);
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	IA32_Mov_Reg_Imm32(jit, REG_EAX, SP_ERROR_NONE);
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	/* save where error checking/halting functions should go to */
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	jitoffs_t offs_return = jit->get_outputpos();
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	//mov esp, esi			- restore stack pointer
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	IA32_Mov_Reg_Rm(jit, REG_ESP, REG_ESI, MOD_REG);
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	/* _FOR NOW_ ...
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	 * We are going to restore SP, HP, and FRM for now.  This is for 
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     * debugging only, to check for alignment errors.  As such:
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	 * :TODO: probably remove this.
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	 */
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	//mov ecx, [esi+context]
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	//sub edi, ebp
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	//mov edx, [esi+heap]
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	//mov [ecx+sp], edi
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	//mov [ecx+hp], edx
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_ECX, REG_ESI, AMX_INFO_CONTEXT);
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	IA32_Sub_Reg_Rm(jit, REG_EDI, REG_EBP, MOD_REG);
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_EDX, REG_ESI, AMX_INFO_HEAP);
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	IA32_Mov_Rm_Reg_Disp8(jit, REG_ECX, REG_EDI, offsetof(sp_context_t, sp));
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	IA32_Mov_Rm_Reg(jit, REG_ECX, REG_EDX, MOD_REG);
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	//add esp, 4*NUM_INFO_PARAMS
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	//pop ebx
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	//pop edi
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	//pop esi
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	//pop ebp
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	//ret
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	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*NUM_INFO_PARAMS, MOD_REG);
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	IA32_Pop_Reg(jit, REG_EBX);
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	IA32_Pop_Reg(jit, REG_EDI);
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	IA32_Pop_Reg(jit, REG_ESI);
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	IA32_Pop_Reg(jit, REG_EBP);
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	IA32_Return(jit);
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	return offs_return;
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}
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void Write_BreakDebug(JitWriter *jit)
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{
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	//push ecx
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	//mov ecx, [esi+ctx]
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	//cmp [ecx+dbreak], 0
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	//jnz :nocall
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	IA32_Push_Reg(jit, AMX_REG_TMP);
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_CONTEXT);
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	IA32_Cmp_Rm_Disp8_Imm8(jit, AMX_REG_TMP, offsetof(sp_context_t, dbreak), 0);
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	jitoffs_t jmp = IA32_Jump_Cond_Imm8(jit, CC_NZ, 0);
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	//pushad
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	IA32_Pushad(jit);
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	//push [esi+frm]
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	//push [ecx+context]
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	//mov ecx, [ecx+dbreak]
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	//call ecx
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	//add esp, 8
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	//popad
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	IA32_Push_Rm_Disp8(jit, AMX_REG_INFO, AMX_INFO_FRAME); //:TODO: move to regs and push? and dont disp for 0
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	IA32_Push_Rm_Disp8(jit, AMX_REG_TMP, offsetof(sp_context_t, context));
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_TMP, offsetof(sp_context_t, dbreak));
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	IA32_Call_Reg(jit, AMX_REG_TMP);
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	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*2, MOD_REG);
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	IA32_Popad(jit);
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	//:nocall
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	IA32_Send_Jump8_Here(jit, jmp);
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	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*1, MOD_REG);
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	IA32_Return(jit);
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}
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void Write_GetError(JitWriter *jit)
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{
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	CompData *data = (CompData *)jit->data;
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	//mov eax, [esi+info.context]
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	//mov eax, [eax+ctx.error]
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	//jmp [jit_return]
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, AMX_REG_INFO, AMX_INFO_CONTEXT);
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	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, REG_EAX, offsetof(sp_context_t, err));
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	IA32_Jump_Imm32_Abs(jit, data->jit_return);
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}
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void Write_SetError(JitWriter *jit, int error)
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{
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	CompData *data = (CompData *)jit->data;
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	//mov eax, <error>
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	//jmp [jit_return]
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	IA32_Mov_Reg_Imm32(jit, REG_EAX, error);
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	IA32_Jump_Imm32_Abs(jit, data->jit_return);
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}
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void Write_Check_DivZero(JitWriter *jit, jit_uint8_t reg)
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{
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	//test reg, reg
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	//jz :error
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	IA32_Test_Rm_Reg(jit, reg, reg, MOD_REG);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_Z, ((CompData *)jit->data)->jit_error_divzero);
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}
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void Write_CheckHeap_Min(JitWriter *jit)
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{
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	/* Check if the stack went beyond the heap low.
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	 * This usually means there was a compiler error.
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	 * NOTE: Special optimization here.
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	 * The heap low is always known ahead of time! :)
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	 */
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	CompData *data = (CompData *)jit->data;
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	//cmp [esi+info.heap], <heaplow>
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	//jb :error
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	IA32_Cmp_Rm_Imm32_Disp8(jit, AMX_REG_INFO, AMX_INFO_HEAP, data->plugin->data_size);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_B, data->jit_error_heapmin);
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}
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void Write_CheckHeap_Low(JitWriter *jit)
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{
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	/* Check if the heap is trying to grow beyond the stack.
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	 */
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	//mov ecx, [esi+info.heap]
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	//lea ecx, [ebp+ecx+STACK_MARGIN]
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	//cmp ecx, edi
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	//ja :error		; I think this is right
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_HEAP);
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	IA32_Lea_Reg_DispRegMultImm8(jit, AMX_REG_TMP, AMX_REG_DAT, AMX_REG_TMP, NOSCALE, STACK_MARGIN);
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	IA32_Cmp_Reg_Rm(jit, AMX_REG_TMP, AMX_REG_STK, MOD_REG);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_A, ((CompData *)jit->data)->jit_error_heaplow);
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}
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void Write_CheckStack_Min(JitWriter *jit)
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{
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	/* Check if the stack went beyond the stack top
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	 * This usually means there was a compiler error.
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	 */
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	//cmp edi, [esi+info.stacktop]
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	//jae :error
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	IA32_Cmp_Reg_Rm_Disp8(jit, AMX_REG_STK, AMX_REG_INFO, AMX_INFO_STACKTOP);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_AE, ((CompData *)jit->data)->jit_error_stackmin);
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}
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void Write_CheckStack_Low(JitWriter *jit)
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{
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	/* Check if the stack went beyond the heap boundary.
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	 * Unfortunately this one isn't as quick as the other check.
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	 * The stack margin check is important for sysreq.n having space.
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	 */
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	//mov ecx, [esi+info.heap]
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	//lea ecx, [ebp+ecx+STACK_MARGIN]
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	//cmp edi, ecx
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	//jb :error		; I think this is right
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	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_HEAP);
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	IA32_Lea_Reg_DispRegMultImm8(jit, AMX_REG_TMP, AMX_REG_DAT, AMX_REG_TMP, NOSCALE, STACK_MARGIN);
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	IA32_Cmp_Reg_Rm(jit, AMX_REG_STK, AMX_REG_TMP, MOD_REG);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_B, ((CompData *)jit->data)->jit_error_stacklow);
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}
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void Write_Check_VerifyAddr(JitWriter *jit, jit_uint8_t reg)
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{
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	CompData *data = (CompData *)jit->data;
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	/* :TODO: Should this be checking for below heaplow?
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	 * The old JIT did not.
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	 */
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	bool call = false;
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	if (!(data->inline_level & JIT_INLINE_ERRORCHECKS))
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	{
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		/* If we're not in the initial generation phase,
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		 * Write a call to the actual routine instead.
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		 */
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		if ((reg == REG_EAX) && data->jit_verify_addr_eax)
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		{
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			jitoffs_t call = IA32_Call_Imm32(jit, 0);
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			IA32_Write_Jump32(jit, call, data->jit_verify_addr_eax);
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			return;
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		} else if ((reg == REG_EDX) && data->jit_verify_addr_edx) {
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			jitoffs_t call = IA32_Call_Imm32(jit, 0);
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			IA32_Write_Jump32(jit, call, data->jit_verify_addr_edx);
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			return;
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		}
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		call = true;
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	}
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	/** 
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	 * :TODO: If we can't find a nicer way of doing this,
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	 *  then scrap it on high optimizations.  The second portion is not needed at all!
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	 */
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	/* Part 1: Check if we're in the memory bounds */
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	//cmp <reg>, [esi+info.stpu]
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	//jae :error
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	IA32_Cmp_Reg_Rm_Disp8(jit, reg, AMX_REG_INFO, AMX_INFO_STACKTOP_U);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_AE, ((CompData *)jit->data)->jit_error_memaccess);
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	/* Part 2: Check if we're in the invalid region between HP and SP */
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	jitoffs_t jmp;
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	//cmp <reg>, [esi+info.heap]
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	//jb :continue
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	//lea ecx, [ebp+<reg>]
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	//cmp edi, ecx
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	//jb :error
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	//:continue
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	IA32_Cmp_Reg_Rm_Disp8(jit, reg, AMX_REG_INFO, AMX_INFO_HEAP);
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	jmp = IA32_Jump_Cond_Imm8(jit, CC_B, 0);
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	IA32_Lea_Reg_DispRegMultImm8(jit, AMX_REG_TMP, AMX_REG_DAT, reg, NOSCALE, 0);
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	IA32_Cmp_Reg_Rm(jit, AMX_REG_TMP, AMX_REG_STK, MOD_REG);
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	IA32_Jump_Cond_Imm32_Abs(jit, CC_B, ((CompData *)jit->data)->jit_error_memaccess);
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	IA32_Send_Jump8_Here(jit, jmp);
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	if (call)
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	{
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		IA32_Return(jit);
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	}
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}
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void Macro_PushN_Addr(JitWriter *jit, int i)
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{
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   308
	//push eax
faluco@97
   309
	//mov eax, [esi+frm]
dvander@70
   310
	//loop i times:
dvander@70
   311
	// lea ecx, [eax+<val>]
faluco@97
   312
	// mov [edi-4*i], ecx
faluco@97
   313
	//sub edi, 4*N
dvander@70
   314
	//pop eax
dvander@70
   315
dvander@70
   316
	cell_t val;
dvander@70
   317
	int n = 1;
dvander@70
   318
	IA32_Push_Reg(jit, AMX_REG_PRI);
faluco@97
   319
	IA32_Mov_Reg_Rm(jit, AMX_REG_PRI, AMX_REG_INFO, MOD_MEM_REG);
dvander@70
   320
	do
dvander@70
   321
	{
dvander@70
   322
		val = jit->read_cell();
dvander@70
   323
		if (val < SCHAR_MAX && val > SCHAR_MIN)
dvander@70
   324
			IA32_Lea_DispRegImm8(jit, AMX_REG_TMP, AMX_REG_PRI, (jit_int8_t)val);
dvander@70
   325
		else
dvander@70
   326
			IA32_Lea_DispRegImm32(jit, AMX_REG_TMP, AMX_REG_PRI, val);
dvander@70
   327
		IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_STK, AMX_REG_TMP, -4*n);
dvander@70
   328
	} while (n++ < i);
dvander@70
   329
	IA32_Sub_Rm_Imm8(jit, AMX_REG_STK, 4*i, MOD_REG);
dvander@70
   330
	IA32_Pop_Reg(jit, AMX_REG_PRI);
dvander@70
   331
}
dvander@70
   332
dvander@70
   333
void Macro_PushN_S(JitWriter *jit, int i)
dvander@70
   334
{
dvander@70
   335
	//loop i times:
dvander@70
   336
	// mov ecx, [ebx+<val>]
faluco@97
   337
	// mov [edi-4*i], ecx
faluco@97
   338
	//sub edi, 4*N
dvander@70
   339
dvander@70
   340
	cell_t val;
dvander@70
   341
	int n = 1;
dvander@70
   342
	do 
dvander@70
   343
	{
dvander@70
   344
		val = jit->read_cell();
dvander@70
   345
		if (val < SCHAR_MAX && val > SCHAR_MIN)
dvander@70
   346
			IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_FRM, (jit_int8_t)val);
dvander@70
   347
		else
dvander@70
   348
			IA32_Mov_Reg_Rm_Disp32(jit, AMX_REG_TMP, AMX_REG_FRM, val);
dvander@70
   349
		IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_STK, AMX_REG_TMP, -4*n);
dvander@70
   350
	} while (n++ < i);
dvander@70
   351
	IA32_Sub_Rm_Imm8(jit, AMX_REG_STK, 4*i, MOD_REG);
dvander@70
   352
}
dvander@70
   353
dvander@70
   354
void Macro_PushN_C(JitWriter *jit, int i)
dvander@70
   355
{
dvander@70
   356
	//loop i times:
faluco@97
   357
	// mov [edi-4*i], <val>
faluco@97
   358
	//sub edi, 4*N
dvander@70
   359
dvander@70
   360
	int n = 1;
dvander@70
   361
	do 
dvander@70
   362
	{
dvander@70
   363
		IA32_Mov_Rm_Imm32_Disp8(jit, AMX_REG_STK, jit->read_cell(), -4*n);
dvander@70
   364
	} while (n++ < i);
dvander@70
   365
	IA32_Sub_Rm_Imm8(jit, AMX_REG_STK, 4*i, MOD_REG);
dvander@70
   366
}
dvander@70
   367
dvander@70
   368
void Macro_PushN(JitWriter *jit, int i)
dvander@70
   369
{
dvander@70
   370
	//loop i times:
faluco@97
   371
	// mov ecx, [ebp+<val>]
faluco@97
   372
	// mov [edi-4*i], ecx
faluco@97
   373
	//sub edi, 4*N
dvander@70
   374
dvander@70
   375
	cell_t val;
dvander@70
   376
	int n = 1;
dvander@70
   377
	do 
dvander@70
   378
	{
dvander@70
   379
		val = jit->read_cell();
dvander@70
   380
		if (val < SCHAR_MAX && val > SCHAR_MIN)
dvander@70
   381
			IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_DAT, (jit_int8_t)val);
dvander@70
   382
		else
dvander@70
   383
			IA32_Mov_Reg_Rm_Disp32(jit, AMX_REG_TMP, AMX_REG_DAT, val);
dvander@70
   384
		IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_STK, AMX_REG_TMP, -4*n);
dvander@70
   385
	} while (n++ < i);
dvander@70
   386
	IA32_Sub_Rm_Imm8(jit, AMX_REG_STK, 4*i, MOD_REG);
dvander@70
   387
}
dvander@70
   388
dvander@113
   389
void WriteOp_Sysreq_C_Function(JitWriter *jit)
dvander@113
   390
{
dvander@113
   391
	/* The small daddy of the big daddy of opcodes.
dvander@113
   392
	 * ecx - native index
dvander@113
   393
	 */
dvander@113
   394
	CompData *data = (CompData *)jit->data;
dvander@113
   395
dvander@113
   396
	/* save registers we will need */
dvander@113
   397
	//push edx
dvander@113
   398
	IA32_Push_Reg(jit, AMX_REG_ALT);
dvander@113
   399
dvander@113
   400
	/* push some callback stuff */
dvander@113
   401
	//push edi		; stack
dvander@113
   402
	//push ecx		; native index
dvander@113
   403
	IA32_Push_Reg(jit, AMX_REG_STK);
dvander@113
   404
	IA32_Push_Reg(jit, REG_ECX);
dvander@113
   405
dvander@113
   406
	/* Relocate stack, heap, frm information, then store back */
dvander@113
   407
	//sub edi, ebp
dvander@113
   408
	//mov ecx, [esi+hea]
dvander@113
   409
	//mov eax, [esi+context]
dvander@113
   410
	//mov [eax+hp], ecx
dvander@113
   411
	//mov [eax+sp], edi
dvander@113
   412
	//mov ecx, [esi+frm]
dvander@113
   413
	//mov [eax+frm], ecx
dvander@113
   414
	IA32_Sub_Rm_Reg(jit, AMX_REG_STK, AMX_REG_DAT, MOD_REG);
dvander@113
   415
	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_HEAP);
dvander@113
   416
	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, AMX_REG_INFO, AMX_INFO_CONTEXT);
dvander@113
   417
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_TMP, offsetof(sp_context_t, hp));
dvander@113
   418
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_STK, offsetof(sp_context_t, sp));
dvander@113
   419
	IA32_Mov_Reg_Rm(jit, AMX_REG_TMP, AMX_INFO_FRM, MOD_REG);
dvander@113
   420
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_TMP, offsetof(sp_context_t, frm));
dvander@113
   421
dvander@113
   422
	/* finally, push the last parameter and make the call */
dvander@113
   423
	//push eax		; context
dvander@113
   424
	//call NativeCallback
dvander@113
   425
	IA32_Push_Reg(jit, REG_EAX);
dvander@113
   426
	jitoffs_t call = IA32_Call_Imm32(jit, 0);
dvander@113
   427
	if (!data->debug)
dvander@113
   428
	{
dvander@113
   429
		IA32_Write_Jump32_Abs(jit, call, NativeCallback);
dvander@113
   430
	} else {
dvander@113
   431
		IA32_Write_Jump32_Abs(jit, call, NativeCallback_Debug);
dvander@113
   432
	}
dvander@113
   433
dvander@113
   434
	/* Test for error */
dvander@113
   435
	//mov ecx, [esi+context]
dvander@113
   436
	//cmp [ecx+err], 0
dvander@113
   437
	//jnz :error
dvander@113
   438
	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_CONTEXT);
dvander@113
   439
	IA32_Cmp_Rm_Imm32_Disp8(jit, AMX_REG_TMP, offsetof(sp_context_t, err), 0);
dvander@113
   440
	IA32_Jump_Cond_Imm32_Abs(jit, CC_NZ, data->jit_extern_error);
dvander@113
   441
dvander@113
   442
	/* restore what we damaged */
dvander@113
   443
	//add esp, 4*3
dvander@113
   444
	//add edi, ebp
dvander@113
   445
	//pop edx
dvander@113
   446
	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*3, MOD_REG);
dvander@113
   447
	IA32_Add_Rm_Reg(jit, AMX_REG_STK, AMX_REG_DAT, MOD_REG);
dvander@113
   448
	IA32_Pop_Reg(jit, AMX_REG_ALT);
dvander@113
   449
dvander@113
   450
	//ret
dvander@113
   451
	IA32_Return(jit);
dvander@113
   452
}
dvander@113
   453
dvander@124
   454
void GenerateArrayIndirectionVectors(cell_t *arraybase, cell_t dims[], ucell_t _dimcount, bool autozero)
dvander@121
   455
{
dvander@121
   456
	cell_t vectors = 1;				/* we need one vector to start off with */
dvander@121
   457
	cell_t cur_offs = 0;
dvander@121
   458
	cell_t cur_write = 0;
dvander@124
   459
	cell_t dimcount = _dimcount;
dvander@121
   460
dvander@121
   461
	/* Initialize rotation */
dvander@121
   462
	cur_write = dims[dimcount-1];
dvander@121
   463
	
dvander@121
   464
	while (--dimcount >= 1)
dvander@121
   465
	{
dvander@121
   466
		cell_t cur_dim = dims[dimcount];
dvander@121
   467
		cell_t sub_dim = dims[dimcount-1];
dvander@121
   468
		for (cell_t i=0; i<vectors; i++)
dvander@121
   469
		{
dvander@121
   470
			for (cell_t j=0; j<cur_dim; j++)
dvander@121
   471
			{
dvander@121
   472
				arraybase[cur_offs] = (cur_write - cur_offs)*sizeof(cell_t);
dvander@121
   473
				cur_offs++;
dvander@121
   474
				cur_write += sub_dim;
dvander@121
   475
			}
dvander@121
   476
		}
dvander@121
   477
		vectors = cur_dim;
dvander@121
   478
	}
dvander@121
   479
dvander@124
   480
	/* everything after cur_offs can be zeroed */
dvander@124
   481
	if (autozero)
dvander@124
   482
	{
dvander@124
   483
		size_t size = 1;
dvander@124
   484
		for (ucell_t i=0; i<_dimcount; i++)
dvander@124
   485
		{
dvander@124
   486
			size *= dims[i];
dvander@124
   487
		}
dvander@124
   488
		memset(&arraybase[cur_offs], 0, size*sizeof(cell_t));
dvander@124
   489
	}
dvander@124
   490
dvander@121
   491
	return;
dvander@121
   492
}
dvander@121
   493
dvander@121
   494
/**
dvander@121
   495
 * A few notes about this function.
dvander@121
   496
 * I was more concerned about efficient use of registers here, rather than 
dvander@121
   497
 *  fine-tuned optimization.  The reason is that the code is already complicated,
dvander@121
   498
 *  and it is very easy to mess up.
dvander@121
   499
 */
dvander@120
   500
void WriteIntrinsic_GenArray(JitWriter *jit)
dvander@120
   501
{
dvander@121
   502
	/**
dvander@121
   503
	 * save important values
dvander@121
   504
	 */
dvander@121
   505
	//push ebx
dvander@121
   506
	//push eax
dvander@124
   507
	//push edx
dvander@121
   508
	//push ecx				;value is referenced on stack
dvander@121
   509
	IA32_Push_Reg(jit, REG_EBX);
dvander@121
   510
	IA32_Push_Reg(jit, REG_EAX);
dvander@124
   511
	IA32_Push_Reg(jit, REG_EDX);
dvander@121
   512
	IA32_Push_Reg(jit, REG_ECX);
dvander@121
   513
dvander@121
   514
	/**
dvander@121
   515
	 * Calculate how many cells will be needed.
dvander@121
   516
	 */
dvander@121
   517
	//mov edx, [edi]		;get last dimension's count
dvander@121
   518
	//mov eax, 1			;position at second to last dimension
dvander@121
   519
	//:loop
dvander@121
   520
	//cmp eax, [esp]		;compare to # of params
dvander@121
   521
	//jae :done				;end loop if done
dvander@121
   522
	//mov ecx, [edi+eax*4]	;get dimension size
dvander@121
   523
	//imul edx, ecx			;multiply by size
dvander@121
   524
	//add edx, ecx			;add size (indirection vector)
dvander@121
   525
	//inc eax				;increment
dvander@121
   526
	//jmp :loop				;jump back
dvander@121
   527
	//:done
dvander@121
   528
	IA32_Mov_Reg_Rm(jit, REG_EDX, AMX_REG_STK, MOD_MEM_REG);
dvander@121
   529
	IA32_Mov_Reg_Imm32(jit, REG_EAX, 1);
dvander@121
   530
	jitoffs_t loop1 = jit->get_outputpos();
dvander@121
   531
	IA32_Cmp_Reg_Rm_ESP(jit, REG_EAX);
dvander@121
   532
	jitoffs_t done1 = IA32_Jump_Cond_Imm8(jit, CC_AE, 0);
dvander@121
   533
	IA32_Mov_Reg_Rm_Disp_Reg(jit, REG_ECX, AMX_REG_STK, REG_EAX, SCALE4);
dvander@121
   534
	IA32_IMul_Reg_Rm(jit, REG_EDX, REG_ECX, MOD_REG);
dvander@121
   535
	IA32_Add_Rm_Reg(jit, REG_EDX, REG_ECX, MOD_REG);
dvander@121
   536
	IA32_Inc_Reg(jit, REG_EAX);
dvander@121
   537
	IA32_Write_Jump8(jit, IA32_Jump_Imm8(jit, loop1), loop1);
dvander@121
   538
	IA32_Send_Jump8_Here(jit, done1);
dvander@121
   539
dvander@121
   540
	/* Test if we have heap space for this */
dvander@121
   541
	//mov eax, [esi+info.heap]	;get heap pointer
dvander@121
   542
	//lea eax, [eax+edx*4+4]	;new heap pointer
dvander@121
   543
	//cmp eax, <hlw>			;compare to heap low
dvander@121
   544
	//jbe :error				;die if we hit this (it should always be >)
dvander@121
   545
	//add eax, ebp				;relocate to stack
dvander@121
   546
	//cmp eax, edi				;die if above the stack pointer
dvander@121
   547
	//jae :error
dvander@121
   548
	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, AMX_REG_INFO, AMX_INFO_HEAP);
dvander@121
   549
	IA32_Lea_Reg_DispRegMultImm8(jit, REG_EAX, REG_EAX, REG_EDX, SCALE4, 4);
dvander@121
   550
	IA32_Cmp_Rm_Imm32(jit, MOD_REG, REG_EAX, ((CompData *)jit->data)->plugin->data_size);
dvander@121
   551
	IA32_Jump_Cond_Imm32_Abs(jit, CC_BE, ((CompData *)jit->data)->jit_error_array_too_big);
dvander@121
   552
	IA32_Add_Rm_Reg(jit, REG_EAX, AMX_REG_DAT, MOD_REG);
dvander@121
   553
	IA32_Cmp_Reg_Rm(jit, REG_EAX, AMX_REG_STK, MOD_REG);
dvander@121
   554
	IA32_Jump_Cond_Imm32_Abs(jit, CC_AE, ((CompData *)jit->data)->jit_error_array_too_big);
dvander@121
   555
	
dvander@121
   556
	/* Prepare for indirection iteration */
dvander@121
   557
	//mov eax, [esi+info.heap]	;get heap pointer
dvander@121
   558
	//lea ebx, [eax+edx*4+4]	;new heap pointer
dvander@121
   559
	//mov [esi+info.heap], ebx	;store back
dvander@121
   560
	//lea ebx, [ebp+ebx-4]		;relocate
dvander@121
   561
	//mov [ebx], edx			;store back total size
dvander@121
   562
	//push eax					;save heap pointer - we need it
dvander@121
   563
	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, AMX_REG_INFO, AMX_INFO_HEAP);
dvander@121
   564
	IA32_Lea_Reg_DispRegMultImm8(jit, REG_EBX, REG_EAX, REG_EDX, SCALE4, 4);
dvander@121
   565
	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_INFO, REG_EBX, AMX_INFO_HEAP);
dvander@121
   566
	IA32_Lea_Reg_DispRegMultImm8(jit, REG_EBX, AMX_REG_DAT, REG_EBX, NOSCALE, -4);
dvander@121
   567
	IA32_Mov_Rm_Reg(jit, REG_EBX, REG_EDX, MOD_MEM_REG);
dvander@121
   568
	IA32_Push_Reg(jit, REG_EAX);
dvander@121
   569
	
dvander@121
   570
	/* This part is too messy to do in straight assembly.
dvander@121
   571
	 * I'm letting the compiler handle it and thus it's in C.
dvander@121
   572
	 */
dvander@121
   573
	//lea ebx, [ebp+eax]		;get base pointer
dvander@124
   574
	//push dword [esp-8]		;push autozero
dvander@124
   575
	//push dword [esp-8]		;push dimension count
dvander@121
   576
	//push edi					;push dim array
dvander@121
   577
	//push ebx
dvander@121
   578
	//call GenerateArrayIndirectionVectors
dvander@121
   579
	//add esp, 4*3
dvander@121
   580
	IA32_Lea_Reg_DispRegMult(jit, REG_EBX, REG_EAX, REG_EBP, NOSCALE);
dvander@124
   581
	IA32_Push_Rm_Disp8_ESP(jit, 8);
dvander@124
   582
	IA32_Push_Rm_Disp8_ESP(jit, 8);
dvander@121
   583
	IA32_Push_Reg(jit, REG_EDI);
dvander@121
   584
	IA32_Push_Reg(jit, REG_EBX);
dvander@121
   585
	IA32_Write_Jump32_Abs(jit, IA32_Call_Imm32(jit, 0), (void *)&GenerateArrayIndirectionVectors);
dvander@124
   586
	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*4, MOD_REG);
dvander@121
   587
dvander@121
   588
	/* Store the heap pointer back into the stack */
dvander@121
   589
	//pop eax					;restore heap pointer
dvander@121
   590
	//pop ecx					;restore param count
dvander@121
   591
	//lea edi, [edi+ecx*4-4]	;pop params-4 off the stack
dvander@121
   592
	//mov [edi], eax			;store back the heap pointer
dvander@121
   593
	IA32_Pop_Reg(jit, REG_EAX);
dvander@121
   594
	IA32_Pop_Reg(jit, REG_ECX);
dvander@121
   595
	IA32_Lea_Reg_DispRegMultImm8(jit, AMX_REG_STK, AMX_REG_STK, REG_ECX, SCALE4, -4);
dvander@121
   596
	IA32_Mov_Rm_Reg(jit, AMX_REG_STK, REG_EAX, MOD_MEM_REG);
dvander@121
   597
dvander@121
   598
	/* Return to caller */
dvander@124
   599
	//pop edx
dvander@121
   600
	//pop eax
dvander@121
   601
	//pop ebx
dvander@121
   602
	//ret
dvander@124
   603
	IA32_Pop_Reg(jit, REG_ECX);
dvander@121
   604
	IA32_Pop_Reg(jit, REG_EAX);
dvander@121
   605
	IA32_Pop_Reg(jit, REG_EBX);
dvander@121
   606
	IA32_Return(jit);
dvander@120
   607
}
dvander@120
   608
dvander@105
   609
void WriteOp_Sysreq_N_Function(JitWriter *jit)
dvander@105
   610
{
dvander@105
   611
	/* The big daddy of opcodes.
dvander@105
   612
	 * eax - num_params
dvander@105
   613
	 * ecx - native index
dvander@105
   614
	 */
dvander@105
   615
	CompData *data = (CompData *)jit->data;
dvander@105
   616
dvander@105
   617
	/* store the number of parameters on the stack */
dvander@105
   618
	//mov [edi-4], eax
dvander@105
   619
	//sub edi, 4
dvander@105
   620
	IA32_Mov_Rm_Reg_Disp8(jit, AMX_REG_STK, REG_EAX, -4);
dvander@105
   621
	IA32_Sub_Rm_Imm8(jit, AMX_REG_STK, 4, MOD_REG);
dvander@105
   622
dvander@105
   623
	/* save registers we will need */
dvander@105
   624
	//push eax	; num_params for stack popping
dvander@105
   625
	//push edx
dvander@105
   626
	IA32_Push_Reg(jit, REG_EAX);
dvander@105
   627
	IA32_Push_Reg(jit, AMX_REG_ALT);
dvander@105
   628
dvander@105
   629
	/* push some callback stuff */
dvander@105
   630
	//push edi		; stack
dvander@105
   631
	//push ecx		; native index
dvander@105
   632
	IA32_Push_Reg(jit, AMX_REG_STK);
dvander@105
   633
	IA32_Push_Reg(jit, REG_ECX);
dvander@105
   634
dvander@105
   635
	/* Relocate stack, heap, frm information, then store back */
dvander@105
   636
	//sub edi, ebp
dvander@105
   637
	//mov ecx, [esi+hea]
dvander@105
   638
	//mov eax, [esi+context]
dvander@105
   639
	//mov [eax+hp], ecx
dvander@105
   640
	//mov [eax+sp], edi
dvander@105
   641
	//mov ecx, [esi+frm]
dvander@105
   642
	//mov [eax+frm], ecx
dvander@105
   643
	IA32_Sub_Rm_Reg(jit, AMX_REG_STK, AMX_REG_DAT, MOD_REG);
dvander@105
   644
	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_HEAP);
dvander@105
   645
	IA32_Mov_Reg_Rm_Disp8(jit, REG_EAX, AMX_REG_INFO, AMX_INFO_CONTEXT);
dvander@105
   646
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_TMP, offsetof(sp_context_t, hp));
dvander@105
   647
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_STK, offsetof(sp_context_t, sp));
dvander@105
   648
	IA32_Mov_Reg_Rm(jit, AMX_REG_TMP, AMX_INFO_FRM, MOD_REG);
dvander@105
   649
	IA32_Mov_Rm_Reg_Disp8(jit, REG_EAX, AMX_REG_TMP, offsetof(sp_context_t, frm));
dvander@105
   650
dvander@105
   651
	/* finally, push the last parameter and make the call */
dvander@105
   652
	//push eax		; context
dvander@105
   653
	//call NativeCallback
dvander@105
   654
	IA32_Push_Reg(jit, REG_EAX);
dvander@105
   655
	jitoffs_t call = IA32_Call_Imm32(jit, 0);
dvander@113
   656
	if (!data->debug)
dvander@113
   657
	{
dvander@113
   658
		IA32_Write_Jump32_Abs(jit, call, NativeCallback);
dvander@113
   659
	} else {
dvander@113
   660
		IA32_Write_Jump32_Abs(jit, call, NativeCallback_Debug);
dvander@113
   661
	}
dvander@112
   662
dvander@112
   663
	/* Test for error */
dvander@112
   664
	//mov ecx, [esi+context]
dvander@112
   665
	//cmp [ecx+err], 0
dvander@112
   666
	//jnz :error
dvander@112
   667
	IA32_Mov_Reg_Rm_Disp8(jit, AMX_REG_TMP, AMX_REG_INFO, AMX_INFO_CONTEXT);
dvander@112
   668
	IA32_Cmp_Rm_Imm32_Disp8(jit, AMX_REG_TMP, offsetof(sp_context_t, err), 0);
dvander@112
   669
	IA32_Jump_Cond_Imm32_Abs(jit, CC_NZ, data->jit_extern_error);
dvander@105
   670
dvander@105
   671
	/* restore what we damaged */
dvander@105
   672
	//add esp, 4*3
dvander@105
   673
	//add edi, ebp
dvander@105
   674
	//pop edx
dvander@105
   675
	//pop ecx	; num_params
dvander@105
   676
	IA32_Add_Rm_Imm8(jit, REG_ESP, 4*3, MOD_REG);
dvander@105
   677
	IA32_Add_Rm_Reg(jit, AMX_REG_STK, AMX_REG_DAT, MOD_REG);
dvander@105
   678
	IA32_Pop_Reg(jit, AMX_REG_ALT);
dvander@105
   679
	IA32_Pop_Reg(jit, REG_ECX);
dvander@105
   680
dvander@105
   681
	/* pop the AMX stack.  do not check the margins.
dvander@105
   682
	 * Note that this is not a true macro - we don't bother to
dvander@105
   683
	 * set ALT here because nothing will be using it.
dvander@105
   684
	 */
dvander@105
   685
	//lea edi, [edi+ecx*4+4]
dvander@105
   686
	IA32_Lea_Reg_DispRegMultImm8(jit, AMX_REG_STK, AMX_REG_STK, REG_ECX, SCALE4, 4);
dvander@105
   687
dvander@105
   688
	//ret
dvander@105
   689
	IA32_Return(jit);
dvander@105
   690
}
dvander@105
   691