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

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Nikolay Sivov 2023-06-27 21:18:11 +02:00 committed by Alexandre Julliard
parent 68764b74a1
commit 300f3462a4
Notes: Alexandre Julliard 2023-07-04 23:25:31 +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/252
1 changed files with 49 additions and 0 deletions
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49
libs/vkd3d-shader/hlsl_constant_ops.c
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@ -186,6 +186,51 @@ static bool fold_neg(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
return true;
}
static bool fold_rcp(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 < 4; ++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_DIVISION_BY_ZERO,
"Floating point division by zero.");
}
dst->u[k].f = 1.0f / src->value.u[k].f;
if (ctx->profile->major_version < 4 && !isfinite(dst->u[k].f))
{
hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_DIVISION_BY_ZERO,
"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_DIVISION_BY_ZERO,
"Floating point division by zero.");
}
dst->u[k].d = 1.0 / src->value.u[k].d;
break;
default:
FIXME("Fold 'rcp' for type %s.\n", debug_hlsl_type(ctx, dst_type));
return false;
}
}
return true;
}
static bool fold_add(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst, const struct hlsl_type *dst_type,
const struct hlsl_ir_constant *src1, const struct hlsl_ir_constant *src2)
{
@ -721,6 +766,10 @@ bool hlsl_fold_constant_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
success = fold_neg(ctx, &res, instr->data_type, arg1);
break;
case HLSL_OP1_RCP:
success = fold_rcp(ctx, &res, instr->data_type, arg1, &instr->loc);
break;
case HLSL_OP2_ADD:
success = fold_add(ctx, &res, instr->data_type, arg1, arg2);
break;