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vkd3d-shader/hlsl: Fold constant division.

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This commit includes work by Francisco Casas.

Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Francisco Casas <fcasas@codeweavers.com>
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Giovanni Mascellani
2022-04-14 12:52:39 +02:00
committed by Alexandre Julliard
parent aefadb87b6
commit 40b299c727
5 changed files with 104 additions and 1 deletions
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67
libs/vkd3d-shader/hlsl_constant_ops.c
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@@ -255,6 +255,69 @@ static bool fold_nequal(struct hlsl_ctx *ctx, struct hlsl_ir_constant *dst,
return true;
}
static bool fold_div(struct hlsl_ctx *ctx, struct hlsl_ir_constant *dst,
struct hlsl_ir_constant *src1, struct hlsl_ir_constant *src2)
{
enum hlsl_base_type type = dst->node.data_type->base_type;
unsigned int k;
assert(type == src1->node.data_type->base_type);
assert(type == src2->node.data_type->base_type);
for (k = 0; k < dst->node.data_type->dimx; ++k)
{
switch (type)
{
case HLSL_TYPE_FLOAT:
case HLSL_TYPE_HALF:
if (src2->value[k].f == 0)
{
hlsl_warning(ctx, &dst->node.loc, VKD3D_SHADER_WARNING_HLSL_DIVISION_BY_ZERO,
"Floating point division by zero");
}
dst->value[k].f = src1->value[k].f / src2->value[k].f;
break;
case HLSL_TYPE_DOUBLE:
if (src2->value[k].d == 0)
{
hlsl_warning(ctx, &dst->node.loc, VKD3D_SHADER_WARNING_HLSL_DIVISION_BY_ZERO,
"Floating point division by zero");
}
dst->value[k].d = src1->value[k].d / src2->value[k].d;
break;
case HLSL_TYPE_INT:
if (src2->value[k].i == 0)
{
hlsl_error(ctx, &dst->node.loc, VKD3D_SHADER_ERROR_HLSL_DIVISION_BY_ZERO,
"Division by zero.");
return false;
}
if (src1->value[k].i == INT_MIN && src2->value[k].i == -1)
dst->value[k].i = INT_MIN;
else
dst->value[k].i = src1->value[k].i / src2->value[k].i;
break;
case HLSL_TYPE_UINT:
if (src2->value[k].u == 0)
{
hlsl_error(ctx, &dst->node.loc, VKD3D_SHADER_ERROR_HLSL_DIVISION_BY_ZERO,
"Division by zero.");
return false;
}
dst->value[k].u = src1->value[k].u / src2->value[k].u;
break;
default:
FIXME("Fold division for type %s.\n", debug_hlsl_type(ctx, dst->node.data_type));
return false;
}
}
return true;
}
bool hlsl_fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
struct hlsl_ir_constant *arg1, *arg2 = NULL, *res;
@@ -308,6 +371,10 @@ bool hlsl_fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void
success = fold_nequal(ctx, res, arg1, arg2);
break;
case HLSL_OP2_DIV:
success = fold_div(ctx, res, arg1, arg2);
break;
default:
FIXME("Fold \"%s\" expression.\n", debug_hlsl_expr_op(expr->op));
success = false;