__asm 
{
// dot_nd = - ( normal.x * ray_dir.x + normal.y * ray_dir.y + normal.z * ray_dir.z ); // optimized version : // xmm0 <--------------------------- 0 // xmm1 // xmm2 // xmm3 <--------------------------- ray->src // xmm4 <--------------------------- ray->dir // xmm5 <--------------------------- dot_nd // xmm6 <--------------------------- t // xmm7 xorps xmm0, xmm0 ; mov ebx, dword ptr ray ; mov edi, dword ptr state ; mov esi, dword ptr this ; movaps xmm3, xmmword ptr [ebx]e_Ray.src ; movaps xmm4, xmmword ptr [ebx]e_Ray.dir ; movaps xmm5, xmmword ptr [esi]this.normal ; movaps xmm6, xmm5 ; prefetchnta byte ptr [esi+TYPE this] ; movaps xmm7, xmm4 ; mulps xmm5, xmm7 ; movhlps xmm7, xmm5 ; addss xmm7, xmm5 ; shufps xmm5, xmm5, 1 ; addss xmm7, xmm5 ; movaps xmm5, xmm0 ; subss xmm5, xmm7 ; // if( dot_nd <= 0.0f ) comiss xmm0, xmm5 ; movss dword ptr dot_nd, xmm5 ; // return false; jae RETURN_FALSE ;; 161 : t = ray_src.x * normal.x + ray_src.y * normal.y + ray_src.z * normal.z + normal.w; movaps xmm7, xmm3 ; mulps xmm7, xmm6 ; movhlps xmm6, xmm7 ; addss xmm6, xmm7 ; shufps xmm7, xmm7, 253 ; addss xmm6, xmm7 ; movhlps xmm7, xmm7 ; addss xmm6, xmm7 ; // if( t <= t_near * dot_nd ) movss xmm7, dword ptr [ebx]e_Ray.t_near ; mulss xmm7, xmm5 ; comiss xmm7, xmm6 ; movss dword ptr t, xmm6 ; // return false; jae RETURN_FALSE ; // t_far = MIN( ray->t_far, state->t ); movss xmm7, dword ptr [edi]e_RayState.t ; comiss xmm7, dword ptr [ebx]e_Ray.t_far ; jbe CASE_BELOW ; movss xmm7, dword ptr [ebx]e_Ray.t_far ;CASE_BELOW: // if( t >= t_far * dot_nd ) mulss xmm7, xmm5 ; comiss xmm6, xmm7 ; // return false; jae RETURN_FALSE ; // hit.arr[ projX ] = ray_src.arr[ projX ] * dot_nd + ray_dir.arr[ projX ] * t; movzx eax, byte ptr [esi]this.projX ; add eax, eax ; add eax, eax ; movss xmm1, dword ptr [ebx+eax]e_Ray.src ; movss xmm2, dword ptr [ebx+eax]e_Ray.dir ; mulss xmm1, xmm5 ; mulss xmm2, xmm6 ; addss xmm1, xmm2 ; movss dword ptr [hit+eax], xmm1 ; // hit.arr[ projY ] = ray_src.arr[ projY ] * dot_nd + ray_dir.arr[ projY ] * t; movzx ecx, byte ptr [esi]this.projY ; add ecx, ecx ; add ecx, ecx ; movss xmm1, dword ptr [ebx+ecx]e_Ray.src ; movss xmm2, dword ptr [ebx+ecx]e_Ray.dir ; mulss xmm1, xmm5 ; mulss xmm2, xmm6 ; addss xmm1, xmm2 ; movss dword ptr [hit+ecx], xmm1 ; // bary.x = hit.arr[ projX ] * la.x + hit.arr[ projY ] * la.y + la.z * dot_nd; movss xmm7, dword ptr [esi]this.la.x ; mulss xmm7, dword ptr [hit+eax] ; movss xmm1, dword ptr [esi]this.la.y ; mulss xmm1, dword ptr [hit+ecx] ; addss xmm7, xmm1 ; movss xmm1, dword ptr [esi]this.la.z ; mulss xmm1, xmm5 ; addss xmm7, xmm1 ; // if( bary.x < 0.0f || bary.x > dot_nd ) comiss xmm0, xmm7 ; ja RETURN_FALSE ; comiss xmm7, xmm5 ; ja RETURN_FALSE ; // bary.y = hit.arr[ projX ] * lb.x + hit.arr[ projY ] * lb.y + lb.z * dot_nd; movss xmm2, dword ptr [esi]this.lb.x ; mulss xmm2, dword ptr [hit+eax] ; movss xmm1, dword ptr [esi]this.lb.y ; mulss xmm1, dword ptr [hit+ecx] ; addss xmm2, xmm1 ; movss xmm1, dword ptr [esi]this.lb.z ; mulss xmm1, xmm5 ; addss xmm2, xmm1 ; // if( bary.y < 0.0f || bary.y > dot_nd ) comiss xmm0, xmm2 ; ja RETURN_FALSE ; comiss xmm2, xmm5 ; ja RETURN_FALSE ; // bary.z = dot_nd - bary.x - bary.y; movaps xmm1, xmm5 ; subss xmm1, xmm7 ; subss xmm1, xmm2 ; // if( bary.z < 0.0f || bary.z > dot_nd ) comiss xmm0, xmm1 ; ja RETURN_FALSE ; comiss xmm1, xmm5 ; ja RETURN_FALSE ; movss dword ptr bary.x, xmm7 ; movss dword ptr bary.y, xmm2 ; movss dword ptr bary.z, xmm1 ;
} // __asm