Floats To Doubles

alloc(TypeName,256)

alloc(ByteSize,4)
alloc(UsesFloat,4)
alloc(PreferedAlignment,4)

alloc(ConvertRoutine,1024)

label(SKIP)

TypeName:
db 'CustomType_for_Csimbi',0

ByteSize:
dd (int)40 // struct has 40 bytes
UsesFloat:
db 01
PreferedAlignment:
db 04

//double dValue;                                        //0x00
//double dKey1;                                         //0x08
//double dKey2;                                         //0x10
//double dChecksum;  // Irrelevant                      //0x18
//double dZero;      // 0 or 1; 0: valid, 1:invalid     //0x20

//dSearchVal = dKey1 - dKey2 + dValue;

define(dValue ,eax+00)
define(dKey1  ,eax+08)
define(dKey2  ,eax+10)
define(dZero_1,eax+20)
define(dZero_2,eax+24)

ConvertRoutine:
push ebp
mov ebp,esp
mov eax,[ebp+8] //place the address that contains the bytes into eax

cmp dword ptr [dZero_1],0
jne SKIP
cmp dword ptr [dZero_2],0
jne SKIP

finit

push eax
fld qword ptr [dKey1]
fadd qword ptr [dValue]
fsub qword ptr [dKey2]
fstp dword ptr [esp]  // store and convert to float
pop eax

//(I used qword three times because values are "double". I used dword at the end because UsesFloat is used)


pop ebp
ret 4

SKIP:
mov eax,7fffffff    // gives NaN, CE will skip it
pop ebp
ret 4