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vkd3d-shader/hlsl: Add constant folding for 'log2'.

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Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
This commit is contained in:
Nikolay Sivov 2023-07-05 11:09:21 +02:00 committed by Alexandre Julliard
parent 58bc61e48d
commit 932c5e36dc
Notes: Alexandre Julliard 2023-08-14 21:00:52 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/265
2 changed files with 50 additions and 0 deletions
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49
libs/vkd3d-shader/hlsl_constant_ops.c
View File

@ -152,6 +152,51 @@ static bool fold_cast(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
return true;
}
static bool fold_log2(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst, const struct hlsl_type *dst_type,
const struct hlsl_ir_constant *src, const struct vkd3d_shader_location *loc)
{
enum hlsl_base_type type = dst_type->base_type;
unsigned int k;
assert(type == src->node.data_type->base_type);
for (k = 0; k < dst_type->dimx; ++k)
{
switch (type)
{
case HLSL_TYPE_FLOAT:
case HLSL_TYPE_HALF:
if (ctx->profile->major_version >= 4 && src->value.u[k].f < 0.0f)
{
hlsl_warning(ctx, loc, VKD3D_SHADER_WARNING_HLSL_NON_FINITE_RESULT,
"Indefinite logarithm result.");
}
dst->u[k].f = log2f(src->value.u[k].f);
if (ctx->profile->major_version < 4 && !isfinite(dst->u[k].f))
{
hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_NON_FINITE_RESULT,
"Infinities and NaNs are not allowed by the shader model.");
}
break;
case HLSL_TYPE_DOUBLE:
if (src->value.u[k].d < 0.0)
{
hlsl_warning(ctx, loc, VKD3D_SHADER_WARNING_HLSL_NON_FINITE_RESULT,
"Indefinite logarithm result.");
}
dst->u[k].d = log2(src->value.u[k].d);
break;
default:
FIXME("Fold 'log2' for type %s.\n", debug_hlsl_type(ctx, dst_type));
return false;
}
}
return true;
}
static bool fold_neg(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
const struct hlsl_type *dst_type, const struct hlsl_ir_constant *src)
{
@ -867,6 +912,10 @@ bool hlsl_fold_constant_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
success = fold_cast(ctx, &res, instr->data_type, arg1);
break;
case HLSL_OP1_LOG2:
success = fold_log2(ctx, &res, instr->data_type, arg1, &instr->loc);
break;
case HLSL_OP1_NEG:
success = fold_neg(ctx, &res, instr->data_type, arg1);
break;

1
libs/vkd3d-shader/vkd3d_shader_private.h
View File

@ -139,6 +139,7 @@ enum vkd3d_shader_error
VKD3D_SHADER_WARNING_HLSL_DIVISION_BY_ZERO = 5301,
VKD3D_SHADER_WARNING_HLSL_UNKNOWN_ATTRIBUTE = 5302,
VKD3D_SHADER_WARNING_HLSL_IMAGINARY_NUMERIC_RESULT = 5303,
VKD3D_SHADER_WARNING_HLSL_NON_FINITE_RESULT = 5304,
VKD3D_SHADER_ERROR_GLSL_INTERNAL = 6000,