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vkd3d-shader/ir: Use VSIR_OP_NEG in insert_fragment_fog_before_ret(), in the linear case.

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Giovanni Mascellani
2025-10-08 22:54:18 +02:00
committed by Henri Verbeet
parent eb1210f517
commit 786ffe69f7
Notes: Henri Verbeet 2025-10-13 19:32:46 +02:00 
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1783
1 changed files with 16 additions and 10 deletions
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26
libs/vkd3d-shader/ir.c
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@@ -8292,28 +8292,34 @@ static enum vkd3d_result insert_fragment_fog_before_ret(struct vsir_program *pro
case VKD3D_SHADER_FOG_FRAGMENT_LINEAR:
/* We generate the following code:
*
* add sr0, FOG_END, -vFOG.x
* mul_sat srFACTOR, sr0, FOG_SCALE
* neg sr0, vFOG.x
* add sr1, FOG_END, sr0
* mul_sat srFACTOR, sr1, FOG_SCALE
*/
if (!(ins = vsir_program_iterator_insert_before_and_move(it, 4)))
if (!(ins = vsir_program_iterator_insert_before_and_move(it, 5)))
return VKD3D_ERROR_OUT_OF_MEMORY;
ssa_temp = program->ssa_count++;
ssa_temp2 = program->ssa_count++;
vsir_instruction_init_with_params(program, ins, &loc, VSIR_OP_NEG, 1, 1);
dst_param_init_ssa_float(&ins->dst[0], ssa_temp);
vsir_src_param_init(&ins->src[0], VKD3DSPR_INPUT, VSIR_DATA_F32, 1);
ins->src[0].reg.idx[0].offset = fog_signature_idx;
ins->src[0].reg.dimension = VSIR_DIMENSION_VEC4;
ins->src[0].swizzle = VKD3D_SHADER_SWIZZLE(X, X, X, X);
ins = vsir_program_iterator_next(it);
vsir_instruction_init_with_params(program, ins, &loc, VSIR_OP_ADD, 1, 2);
dst_param_init_ssa_float(&ins->dst[0], ssa_temp);
dst_param_init_ssa_float(&ins->dst[0], ssa_temp2);
src_param_init_parameter(&ins->src[0], VKD3D_SHADER_PARAMETER_NAME_FOG_END, VSIR_DATA_F32);
vsir_src_param_init(&ins->src[1], VKD3DSPR_INPUT, VSIR_DATA_F32, 1);
ins->src[1].reg.idx[0].offset = fog_signature_idx;
ins->src[1].reg.dimension = VSIR_DIMENSION_VEC4;
ins->src[1].swizzle = VKD3D_SHADER_SWIZZLE(X, X, X, X);
ins->src[1].modifiers = VKD3DSPSM_NEG;
src_param_init_ssa_float(&ins->src[1], ssa_temp);
ins = vsir_program_iterator_next(it);
vsir_instruction_init_with_params(program, ins, &loc, VSIR_OP_MUL, 1, 2);
dst_param_init_ssa_float(&ins->dst[0], ssa_factor);
ins->dst[0].modifiers = VKD3DSPDM_SATURATE;
src_param_init_ssa_float(&ins->src[0], ssa_temp);
src_param_init_ssa_float(&ins->src[0], ssa_temp2);
src_param_init_parameter(&ins->src[1], VKD3D_SHADER_PARAMETER_NAME_FOG_SCALE, VSIR_DATA_F32);
ins = vsir_program_iterator_next(it);