drm: add texture_cube_clear_zwrite_vertex_shader_optimize

drm/cube_rotate_optimize.vs.asm

@@ -0,0 +1,58 @@
+-- CONST[0] = {theta1, theta2, 0.159155, 0.5}
+-- CONST[1] = {6.283185, -3.141593, 0.2, 0.5}
+
+-- ME_SIN and ME_COS clamp their inputs to [-π,+π] prior to the sin/cos
+-- calculation.
+--
+-- This 3-instruction sequence remaps the range [-∞,+∞] to [-π,+π]
+temp[0].xy   = VE_MAD   const[0].xy__   const[0].zz__  const[0].ww__ ;
+temp[0].xy   = VE_FRC   temp[0].xy__ ;
+temp[0].xy   = VE_MAD   temp[0].xy__   const[1].xx__  const[1].yy__ ;
+
+-- sin and cos
+temp[3].x     = ME_SIN   temp[0].___x ;
+temp[3].y     = ME_COS   temp[0].___x ;
+alt_temp[3].z = ME_SIN   temp[0].___y ;
+
+-- temp[3] now contains:
+-- temp[3] = {sin(theta1), cos(theta1), sin(theta2), cos(theta2)}
+
+-------------------------------------------------------------------------
+-- first rotation: X-axis rotation:
+-------------------------------------------------------------------------
+
+-- y_ = (-z0 * st1)
+-- z_ = ( z0 * ct1)
+temp[1].yz    = VE_MUL   input[0]._-zz_  temp[3]._xy_ ,
+alt_temp[3].w = ME_COS   temp[0].y_ ;
+
+-- x1 = (x0 *   1 +      0)
+-- y1 = (y0 * ct1 + nz0st1)
+-- z1 = (y0 * st1 +  z0ct1)
+temp[1].xyz   = VE_MAD   input[0].xyy_   temp[3].1yx_   temp[1].0yz_ ;
+
+-------------------------------------------------------------------------
+-- second rotation: Y-axis rotation:
+-------------------------------------------------------------------------
+
+-- x_ = (-z1 * st2)
+-- z_ = ( z1 * ct2)
+temp[2].xz    = VE_MUL   temp[1].-z_z_   alt_temp[3].z_w_ ;
+
+-- x2 = (x1 * ct2 + nz1st2)
+-- y2 = (y1 *   1 +      0)
+-- z2 = (x1 * st2 +  z1ct2)
+temp[2].xyz   = VE_MAD   temp[1].xyx_    alt_temp[3].w1z_   temp[2].x0z_ ;
+
+-------------------------------------------------------------------------
+-- scale
+-------------------------------------------------------------------------
+
+temp[3].xyz   = VE_MAD   temp[2].xyz_    const[1].zzz_  const[1].00w_ ;
+
+-------------------------------------------------------------------------
+-- output
+-------------------------------------------------------------------------
+
+out[0].xyzw   = VE_MUL   temp[3].xyzz    temp[3].11-z1 ;
+out[1].xyzw   = VE_ADD   input[1].xyzw   input[1].0000 ;

drm/cube_rotate_optimize.vs.inc

@@ -0,0 +1,13 @@
+0x00300004, 0x01f90002, 0x01fa4002, 0x01fb6002,
+0x00300006, 0x01f90000, 0x01ffe000, 0x01ffe000,
+0x00300004, 0x01f90000, 0x01f80022, 0x01f92022,
+0x00106050, 0x003fe000, 0x01ffe000, 0x01ffe000,
+0x00206051, 0x003fe000, 0x01ffe000, 0x01ffe000,
+0x00806451, 0x007fe000, 0x01ffe000, 0x01ffe000,
+0x10602002, 0x05d2e001, 0x01c8e060, 0x10192004,
+0x00702004, 0x01c90001, 0x01c1a060, 0x01d18020,
+0x00504002, 0x03d74020, 0x01df4063, 0x01ffe063,
+0x00704080, 0x01c10020, 0x01d56060, 0x01d40040,
+0x00706004, 0x01d10040, 0x01d24022, 0x01dc8022,
+0x00f00202, 0x00910060, 0x0955a060, 0x01ffe060,
+0x00f02203, 0x00d10021, 0x01248021, 0x01ffe021,