[PATCH v2 1/4] vkd3d-shader/hlsl: Add constant folding for logical 'not', for bools.

[Nikolay Sivov]

From: Nikolay Sivov

Signed-off-by: Nikolay Sivov 
---
 libs/vkd3d-shader/hlsl_constant_ops.c | 28 +++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/libs/vkd3d-shader/hlsl_constant_ops.c b/libs/vkd3d-shader/hlsl_constant_ops.c
index cff0ba31..3b4c86dc 100644
--- a/libs/vkd3d-shader/hlsl_constant_ops.c
+++ b/libs/vkd3d-shader/hlsl_constant_ops.c
@@ -334,6 +334,30 @@ static bool fold_neg(struct hlsl_ctx *ctx, struct hlsl_constant_value *dst,
     return true;
 }

+static bool fold_not(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 = 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_BOOL:
+                dst->u[k].u = ~src->value.u[k].u;
+                break;
+
+            default:
+                FIXME("Fold logic 'not' for type %s.\n", debug_hlsl_type(ctx, dst_type));
+                return false;
+        }
+    }
+    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)
 {
@@ -1091,6 +1115,10 @@ 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_LOGIC_NOT:
+            success = fold_not(ctx, &res, instr->data_type, arg1);
+            break;
+
         case HLSL_OP1_RCP:
             success = fold_rcp(ctx, &res, instr->data_type, arg1, &instr->loc);
             break;