/**
 * Activation function WGSL kernels
 */
export interface ActivationConfig {
    dtype: 'f32' | 'f16';
}
/**
 * SiLU (Swish) activation: silu(x) = x * sigmoid(x) = x / (1 + exp(-x))
 */
export declare function generateSiLUAndMulShader(config: ActivationConfig): string;
/**
 * GELU activation: gelu(x) ≈ 0.5 * x * (1 + tanh(sqrt(2/π) * (x + 0.044715 * x^3)))
 */
export declare function generateGELUAndMulShader(config: ActivationConfig): string;