[PATCH 0/1] MR733: vkd3d-shader/dxil: Implement DX intrinsic CalculateLOD.

[PATCH 1/1] vkd3d-shader/dxil: Implement DX intrinsic CalculateLOD.

[Conor McCarthy]

From: Conor McCarthy

---
 libs/vkd3d-shader/dxil.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index 7f9a74fa7..e399460dd 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -401,6 +401,7 @@ enum dx_intrinsic_opcode
     DX_ATOMIC_BINOP                 =  78,
     DX_ATOMIC_CMP_XCHG              =  79,
     DX_BARRIER                      =  80,
+    DX_CALCULATE_LOD                =  81,
     DX_DERIV_COARSEX                =  83,
     DX_DERIV_COARSEY                =  84,
     DX_DERIV_FINEX                  =  85,
@@ -4182,6 +4183,40 @@ static void sm6_parser_emit_dx_buffer_update_counter(struct sm6_parser *sm6, enu
     instruction_dst_param_init_ssa_scalar(ins, sm6);
 }

+static void sm6_parser_emit_dx_calculate_lod(struct sm6_parser *sm6, enum dx_intrinsic_opcode op,
+        const struct sm6_value **operands, struct function_emission_state *state)
+{
+    const struct sm6_value *resource, *sampler;
+    struct vkd3d_shader_src_param *src_params;
+    struct vkd3d_shader_instruction *ins;
+    struct vkd3d_shader_register coord;
+    unsigned int clamp;
+
+    resource = operands[0];
+    sampler = operands[1];
+    if (!sm6_value_validate_is_texture_handle(resource, op, sm6)
+            || !sm6_value_validate_is_sampler_handle(sampler, op, sm6))
+    {
+        return;
+    }
+
+    if (!sm6_parser_emit_coordinate_construct(sm6, &operands[2], 3, NULL, state, &coord))
+        return;
+
+    clamp = sm6_value_get_constant_uint(operands[5]);
+
+    ins = state->ins;
+    vsir_instruction_init(ins, &sm6->p.location, VKD3DSIH_LOD);
+    if (!(src_params = instruction_src_params_alloc(ins, 3, sm6)))
+        return;
+    src_param_init_vector_from_reg(&src_params[0], &coord);
+    src_params[1].reg = resource->u.handle.reg;
+    src_param_init_scalar(&src_params[1], !clamp);
+    src_param_init_vector_from_reg(&src_params[2], &sampler->u.handle.reg);
+
+    instruction_dst_param_init_ssa_scalar(ins, sm6);
+}
+
 static void sm6_parser_emit_dx_cbuffer_load(struct sm6_parser *sm6, enum dx_intrinsic_opcode op,
         const struct sm6_value **operands, struct function_emission_state *state)
 {
@@ -5078,6 +5113,7 @@ static const struct sm6_dx_opcode_info sm6_dx_op_table[] =
     [DX_BUFFER_LOAD                   ] = {"o", "Hii",  sm6_parser_emit_dx_buffer_load},
     [DX_BUFFER_STORE                  ] = {"v", "Hiiooooc", sm6_parser_emit_dx_buffer_store},
     [DX_BUFFER_UPDATE_COUNTER         ] = {"i", "H8",   sm6_parser_emit_dx_buffer_update_counter},
+    [DX_CALCULATE_LOD                 ] = {"f", "HHfffb", sm6_parser_emit_dx_calculate_lod},
     [DX_CBUFFER_LOAD_LEGACY           ] = {"o", "Hi",   sm6_parser_emit_dx_cbuffer_load},
     [DX_COS                           ] = {"g", "R",    sm6_parser_emit_dx_sincos},
     [DX_COUNT_BITS                    ] = {"i", "m",    sm6_parser_emit_dx_unary},

[Giovanni Mascellani (＠giomasce)]

Can you add a test? I don't think we have support for multisampled textures in the shader runner yet, but at least running that code, even on a non-multisampled texture, is better than nothing.