Conor McCarthy : vkd3d-shader/dxil: Implement DX intrinsic CalculateLOD.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: cb5411408a1399e6bb27c6cf104edc5381ef6742
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/cb5411408a1399e6bb27c6cf104edc...

Author: Conor McCarthy <cmccarthy(a)codeweavers.com>
Date:   Thu Jun 15 00:11:56 2023 +1000

vkd3d-shader/dxil: Implement DX intrinsic CalculateLOD.

---

 libs/vkd3d-shader/dxil.c             | 36 ++++++++++++++++++++++++++++++++++++
 tests/hlsl/calculate-lod.shader_test |  8 ++++----
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index 03c5458b..da8ba662 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -404,6 +404,7 @@ enum dx_intrinsic_opcode
     DX_ATOMIC_BINOP                 =  78,
     DX_ATOMIC_CMP_XCHG              =  79,
     DX_BARRIER                      =  80,
+    DX_CALCULATE_LOD                =  81,
     DX_DISCARD                      =  82,
     DX_DERIV_COARSEX                =  83,
     DX_DERIV_COARSEY                =  84,
@@ -4486,6 +4487,40 @@ 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)
 {
@@ -5514,6 +5549,7 @@ 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},
diff --git a/tests/hlsl/calculate-lod.shader_test b/tests/hlsl/calculate-lod.shader_test
index 807776ee..88325af6 100644
--- a/tests/hlsl/calculate-lod.shader_test
+++ b/tests/hlsl/calculate-lod.shader_test
@@ -29,7 +29,7 @@ float4 main(float4 pos : sv_position) : sv_target
 }
 
 [test]
-todo draw quad
+todo(sm<6 | glsl) draw quad
 probe all rgba (2.0, 1.0, 0.0, 14.0)
 
 
@@ -46,7 +46,7 @@ float4 main(float4 pos : sv_position) : sv_target
 }
 
 [test]
-todo draw quad
+todo(sm<6 | glsl) draw quad
 probe all rgba (2.0, 2.0, 0.0, 0.0)
 
 
@@ -63,7 +63,7 @@ float4 main(float4 pos : sv_position) : sv_target
 }
 
 [test]
-todo draw quad
+todo(sm<6 | glsl) draw quad
 probe all rgba (2.0, 1.0, 0.0, 14.0)
 
 
@@ -80,5 +80,5 @@ float4 main(float4 pos : sv_position) : sv_target
 }
 
 [test]
-todo draw quad
+todo(sm<6 | glsl) draw quad
 probe all rgba (45.0, 50.0, -14.0, -47.0)