SYCL: disable faulty fp16 exp kernel (llama/14395)

* SYCL: disable faulty fp16 CPU exponent for now

* Revert "SYCL: disable faulty fp16 CPU exponent for now"

This reverts commit ed0aab1ec31b4eb4b0f275dd7acd41d96a375202.

* SYCL: disable faulty fp16 CPU exponent for now

* Fix logic of disabling exponent kernel

ggml/src/ggml-sycl/ggml-sycl.cpp

@@ -4215,7 +4215,6 @@ static bool ggml_backend_sycl_device_supports_op(ggml_backend_dev_t dev, const g
                 case GGML_UNARY_OP_GELU_QUICK:
                 case GGML_UNARY_OP_GELU_ERF:
                 case GGML_UNARY_OP_TANH:
-                case GGML_UNARY_OP_EXP:
                 case GGML_UNARY_OP_SGN:
                 case GGML_UNARY_OP_ABS:
                 case GGML_UNARY_OP_ELU:
@@ -4224,6 +4223,9 @@ static bool ggml_backend_sycl_device_supports_op(ggml_backend_dev_t dev, const g
 #else
                     return ggml_is_contiguous(op->src[0]) && (op->src[0]->type == GGML_TYPE_F32 && op->type == GGML_TYPE_F32) && (op->type == op->src[0]->type);
 #endif
+                case GGML_UNARY_OP_EXP:
+                     // Disable FP16 until we find out the root cause of failing fp16 sycl::exp
+                    return ggml_is_contiguous(op->src[0]) && (op->type == op->src[0]->type) && op->src[0]->type == GGML_TYPE_F32;
                 default:
                     return false;
             }