vkd3d-shader/hlsl: Lower non-float operators for SM1.

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/671

libs/vkd3d-shader/hlsl_codegen.c

@@ -3343,6 +3343,61 @@ static bool lower_float_modulus(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr
     return true;
 }
 
+static bool lower_nonfloat_exprs(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, struct hlsl_block *block)
+{
+    struct hlsl_ir_expr *expr;
+
+    if (instr->type != HLSL_IR_EXPR)
+        return false;
+    expr = hlsl_ir_expr(instr);
+    if (expr->op == HLSL_OP1_CAST || instr->data_type->base_type == HLSL_TYPE_FLOAT)
+        return false;
+
+    switch (expr->op)
+    {
+        case HLSL_OP1_ABS:
+        case HLSL_OP1_NEG:
+        case HLSL_OP2_ADD:
+        case HLSL_OP2_DIV:
+        case HLSL_OP2_MAX:
+        case HLSL_OP2_MIN:
+        case HLSL_OP2_MUL:
+        {
+            struct hlsl_ir_node *operands[HLSL_MAX_OPERANDS] = {0};
+            struct hlsl_ir_node *arg, *arg_cast, *float_expr, *ret;
+            struct hlsl_type *float_type;
+            unsigned int i;
+
+            for (i = 0; i < HLSL_MAX_OPERANDS; ++i)
+            {
+                arg = expr->operands[i].node;
+                if (!arg)
+                    continue;
+
+                float_type = hlsl_get_vector_type(ctx, HLSL_TYPE_FLOAT, arg->data_type->dimx);
+                if (!(arg_cast = hlsl_new_cast(ctx, arg, float_type, &instr->loc)))
+                    return false;
+                hlsl_block_add_instr(block, arg_cast);
+
+                operands[i] = arg_cast;
+            }
+
+            float_type = hlsl_get_vector_type(ctx, HLSL_TYPE_FLOAT, instr->data_type->dimx);
+            if (!(float_expr = hlsl_new_expr(ctx, expr->op, operands, float_type, &instr->loc)))
+                return false;
+            hlsl_block_add_instr(block, float_expr);
+
+            if (!(ret = hlsl_new_cast(ctx, float_expr, instr->data_type, &instr->loc)))
+                return false;
+            hlsl_block_add_instr(block, ret);
+
+            return true;
+        }
+        default:
+            return false;
+    }
+}
+
 static bool lower_discard_neg(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
 {
     struct hlsl_ir_node *zero, *bool_false, *or, *cmp, *load;
@@ -5122,6 +5177,13 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
     remove_unreachable_code(ctx, body);
     hlsl_transform_ir(ctx, normalize_switch_cases, body, NULL);
 
+    if (profile-> major_version < 4)
+    {
+        lower_ir(ctx, lower_nonfloat_exprs, body);
+        /* Constants casted to float must be folded. */
+        hlsl_transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL);
+    }
+
     lower_ir(ctx, lower_nonconstant_vector_derefs, body);
     lower_ir(ctx, lower_casts_to_bool, body);
     lower_ir(ctx, lower_int_dot, body);

tests/hlsl/arithmetic-int-uniform.shader_test

@@ -88,7 +88,7 @@ uniform 0 float4 45.0 5.0 0.0 0.0
 todo(sm<4) draw quad
 probe all rgba (0.0, 0.0, 0.0, 0.0)
 
-[pixel shader todo(sm<4)]
+[pixel shader]
 uniform float4 a;
 
 float4 main() : SV_TARGET
@@ -98,7 +98,7 @@ float4 main() : SV_TARGET
 
 [test]
 uniform 0 float4 5.0 -7.0 0.0 -10.0
-todo(sm<4) draw quad
+draw quad
 probe all rgba (5.0, 7.0, 0.0, 10.0)
 
 [pixel shader todo(sm<4)]