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vkd3d-shader: Add constant folding for 'rsq'.

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Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
This commit is contained in:
Nikolay Sivov 2023-09-26 14:32:24 +02:00 committed by Alexandre Julliard
parent a58c659b10
commit f3389789b2
Notes: Alexandre Julliard 2023-10-05 22:37:31 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/368
1 changed files with 44 additions and 0 deletions
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44
libs/vkd3d-shader/hlsl_constant_ops.c
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@ -429,6 +429,46 @@ static bool fold_rcp(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst, cons
return true;
}
static bool fold_rsq(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)
{
if (src->value.u[k].f < 0.0f)
hlsl_warning(ctx, loc, VKD3D_SHADER_WARNING_HLSL_IMAGINARY_NUMERIC_RESULT,
"Imaginary square root result.");
else if (src->value.u[k].f == 0.0f)
hlsl_warning(ctx, loc, VKD3D_SHADER_WARNING_HLSL_IMAGINARY_NUMERIC_RESULT,
"Floating point division by zero.");
}
dst->u[k].f = 1.0f / sqrtf(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;
default:
FIXME("Fold 'rsq' for type %s.\n", debug_hlsl_type(ctx, dst_type));
return false;
}
}
return true;
}
static bool fold_sat(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst, const struct hlsl_type *dst_type,
const struct hlsl_ir_constant *src)
{
@ -1213,6 +1253,10 @@ bool hlsl_fold_constant_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
success = fold_rcp(ctx, &res, instr->data_type, arg1, &instr->loc);
break;
case HLSL_OP1_RSQ:
success = fold_rsq(ctx, &res, instr->data_type, arg1, &instr->loc);
break;
case HLSL_OP1_SAT:
success = fold_sat(ctx, &res, instr->data_type, arg1);
break;