-/*
- * Emit code for TGSI_OPCODE_XPD instruction.
- */
-static boolean
-emit_xpd(struct svga_shader_emitter_v10 *emit,
- const struct tgsi_full_instruction *inst)
-{
- /* dst.x = src0.y * src1.z - src1.y * src0.z
- * dst.y = src0.z * src1.x - src1.z * src0.x
- * dst.z = src0.x * src1.y - src1.x * src0.y
- * dst.w = 1
- */
- struct tgsi_full_src_register s0_xxxx =
- scalar_src(&inst->Src[0], TGSI_SWIZZLE_X);
- struct tgsi_full_src_register s0_yyyy =
- scalar_src(&inst->Src[0], TGSI_SWIZZLE_Y);
- struct tgsi_full_src_register s0_zzzz =
- scalar_src(&inst->Src[0], TGSI_SWIZZLE_Z);
-
- struct tgsi_full_src_register s1_xxxx =
- scalar_src(&inst->Src[1], TGSI_SWIZZLE_X);
- struct tgsi_full_src_register s1_yyyy =
- scalar_src(&inst->Src[1], TGSI_SWIZZLE_Y);
- struct tgsi_full_src_register s1_zzzz =
- scalar_src(&inst->Src[1], TGSI_SWIZZLE_Z);
-
- unsigned tmp1 = get_temp_index(emit);
- struct tgsi_full_src_register tmp1_src = make_src_temp_reg(tmp1);
- struct tgsi_full_dst_register tmp1_dst = make_dst_temp_reg(tmp1);
-
- unsigned tmp2 = get_temp_index(emit);
- struct tgsi_full_src_register tmp2_src = make_src_temp_reg(tmp2);
- struct tgsi_full_dst_register tmp2_dst = make_dst_temp_reg(tmp2);
- struct tgsi_full_src_register neg_tmp2_src = negate_src(&tmp2_src);
-
- unsigned tmp3 = get_temp_index(emit);
- struct tgsi_full_src_register tmp3_src = make_src_temp_reg(tmp3);
- struct tgsi_full_dst_register tmp3_dst = make_dst_temp_reg(tmp3);
- struct tgsi_full_dst_register tmp3_dst_x =
- writemask_dst(&tmp3_dst, TGSI_WRITEMASK_X);
- struct tgsi_full_dst_register tmp3_dst_y =
- writemask_dst(&tmp3_dst, TGSI_WRITEMASK_Y);
- struct tgsi_full_dst_register tmp3_dst_z =
- writemask_dst(&tmp3_dst, TGSI_WRITEMASK_Z);
- struct tgsi_full_dst_register tmp3_dst_w =
- writemask_dst(&tmp3_dst, TGSI_WRITEMASK_W);
-
- /* Note: we put all the intermediate computations into tmp3 in case
- * the XPD dest register is that same as one of the src regs (in which
- * case we could clobber a src reg before we're done with it) .
- *
- * Note: we could get by with just one temp register instead of three
- * since we're doing scalar operations and there's enough room in one
- * temp for everything.
- */
-
- /* MUL tmp1, src0.y, src1.z */
- /* MUL tmp2, src1.y, src0.z */
- /* ADD tmp3.x, tmp1, -tmp2 */
- if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_X) {
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp1_dst,
- &s0_yyyy, &s1_zzzz, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp2_dst,
- &s1_yyyy, &s0_zzzz, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_ADD, &tmp3_dst_x,
- &tmp1_src, &neg_tmp2_src, FALSE);
- }
-
- /* MUL tmp1, src0.z, src1.x */
- /* MUL tmp2, src1.z, src0.x */
- /* ADD tmp3.y, tmp1, -tmp2 */
- if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_Y) {
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp1_dst, &s0_zzzz,
- &s1_xxxx, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp2_dst, &s1_zzzz,
- &s0_xxxx, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_ADD, &tmp3_dst_y,
- &tmp1_src, &neg_tmp2_src, FALSE);
- }
-
- /* MUL tmp1, src0.x, src1.y */
- /* MUL tmp2, src1.x, src0.y */
- /* ADD tmp3.z, tmp1, -tmp2 */
- if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_Z) {
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp1_dst, &s0_xxxx,
- &s1_yyyy, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_MUL, &tmp2_dst, &s1_xxxx,
- &s0_yyyy, FALSE);
- emit_instruction_op2(emit, VGPU10_OPCODE_ADD, &tmp3_dst_z,
- &tmp1_src, &neg_tmp2_src, FALSE);
- }
-
- /* MOV tmp3.w, 1.0 */
- if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_W) {
- struct tgsi_full_src_register one =
- make_immediate_reg_float(emit, 1.0f);
-
- emit_instruction_op1(emit, VGPU10_OPCODE_MOV, &tmp3_dst_w, &one, FALSE);
- }
-
- /* MOV dst, tmp3 */
- emit_instruction_op1(emit, VGPU10_OPCODE_MOV, &inst->Dst[0], &tmp3_src,
- inst->Instruction.Saturate);
-
-
- free_temp_indexes(emit);
-
- return TRUE;
-}
-
-