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vkd3d-shader/hlsl: Implement the firstbithigh() intrinsic.

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This commit is contained in:
Petrichor Park
2024-07-29 13:12:09 -05:00
committed by Henri Verbeet
parent e49beca0d5
commit e6d840170d
Notes: Henri Verbeet 2025-09-22 11:46:20 +02:00 
Approved-by: Francisco Casas (@fcasas)
Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/965
7 changed files with 192 additions and 7 deletions
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33
libs/vkd3d-shader/hlsl_constant_ops.c
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@@ -250,6 +250,35 @@ static bool fold_ceil(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
return true;
}
static bool fold_clz(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
const struct hlsl_type *dst_type, const struct hlsl_ir_constant *src)
{
enum hlsl_base_type type = src->node.data_type->e.numeric.type;
unsigned int k, v;
for (k = 0; k < dst_type->e.numeric.dimx; ++k)
{
switch (type)
{
case HLSL_TYPE_INT:
v = src->value.u[k].i < 0 ? ~src->value.u[k].u : src->value.u[k].u;
break;
case HLSL_TYPE_UINT:
v = src->value.u[k].u;
break;
default:
FIXME("Fold 'clz' for type %s.\n", debug_hlsl_type(ctx, dst_type));
return false;
}
dst->u[k].u = v ? vkd3d_log2i(v) ^ 0x1f : ~0u;
}
return true;
}
static bool fold_cos(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
const struct hlsl_type *dst_type, const struct hlsl_ir_constant *src)
{
@@ -1428,6 +1457,10 @@ bool hlsl_fold_constant_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
success = fold_ceil(ctx, &res, instr->data_type, arg1);
break;
case HLSL_OP1_CLZ:
success = fold_clz(ctx, &res, instr->data_type, arg1);
break;
case HLSL_OP1_COS:
success = fold_cos(ctx, &res, instr->data_type, arg1);
break;