And support this includes:
<xmmintrin.h> SSE
<emmintrin.h> SSE2
<pmmintrin.h> SSE3
<tmmintrin.h> SSSE3
<smmintrin.h> SSE4.1
<nmmintrin.h> SSE4.2

What is the code size limit ?

// Simple windows gui program
#debug
#gui
#include "kernel32.h"
#include "user32.h"
#include "msvcrt.h"
char *msg = "Hi! I'm the example "
#ifdef _WIN64
"64"
#else
"32"
#endif
"-bit program!";
float floorf (float wx) {
      asm{  roundss xmm1,[wx],9
            movss  [wx],xmm1  }
        return wx;  }
//float lerpA(float a,float b,float t){ return a-(a*t)+(b*t); }
float Lerp(float a,float b,float t){ return (b*t); }
typedef struct vec4 {
    float x;
    float y;
    float z;
    float w;
} vec4;
void main(){
    float fir = 4;
    vec4  dif = {11,2,3,5};
    dif.x += fir;
    dif.y += fir;
    dif.z += fir;
    dif.w += fir;
    float height;
    float LvlSize = 110.0f;
    float CamX = 50.0f;
    float CamZ = 50.0f;
    float x = (55.0f + CamX) / 6.327272f;
    float z = (55.0f - CamZ) / 6.327272f;

    float col = floorf(x);
    float row = floorf(z);

    float A = 1.0f;
    float B = 2.0f;
    float C = 3.0f;
    float D = 4.0f;

    float dx = x - col;
    float dz = z - row;

    if(dz < 1.0f - dx)
     { float uy = B - A;
       float vy = C - A;
       height = A + Lerp(0.0f, uy, dx) + Lerp(0.0f, vy, dz);
      }
    else {
       float uy = C - D;
       float vy = B - D;
       height = D + Lerp(0.0f,uy,1.0f - dx) + Lerp(0.0f, vy, 1.0f - dz);
       }
    char rrt[100];
    char *tname = "result: %1.4f";
    sprintf(rrt,tname,height);
    MessageBox(HWND_DESKTOP,rrt,MB_OK,MB_OK);
    ExitProcess(0);
}