Fixed typos, add some doxygen docu

[r14815]

ir/be/ia32/bearch_ia32.c

@@ -1843,7 +1843,7 @@ static int ia32_is_psi_allowed(ir_node *sel, ir_node *phi_list, int i, int j)
 	ir_node *cmp, *cmp_a, *phi;
 	ir_mode *mode;
 
-/* we don't want long long an floating point Psi */
+/* we don't want long long and floating point Psi */
 #define IS_BAD_PSI_MODE(mode) (mode_is_float(mode) || get_mode_size_bits(mode) > 32)
 
 	if (get_irn_mode(sel) != mode_b)
@@ -1904,7 +1904,7 @@ static const backend_params *ia32_get_libfirm_params(void) {
 		NULL,  /* will be set later */
 		ia32_create_intrinsic_fkt,
 		&intrinsic_env,  /* context for ia32_create_intrinsic_fkt */
-		NULL,  /* will be set later */
+		NULL,  /* will be set below */
 	};
 
 	p.dep_param    = &ad;

ir/be/ia32/ia32_emitter.c

@@ -702,6 +702,9 @@ ir_node *get_cfop_target_block(const ir_node *irn) {
 	return get_irn_link(irn);
 }
 
+/**
+ * Emits a block label for the given block.
+ */
 static
 void ia32_emit_block_name(ia32_emit_env_t *env, const ir_node *block)
 {
@@ -710,7 +713,7 @@ void ia32_emit_block_name(ia32_emit_env_t *env, const ir_node *block)
 }
 
 /**
- * Returns the target label for a control flow node.
+ * Emits the target label for a control flow node.
  */
 static
 void ia32_emit_cfop_target(ia32_emit_env_t * env, const ir_node *node) {
@@ -2202,7 +2205,7 @@ void ia32_emit_block_header(ia32_emit_env_t *env, ir_node *block, ir_node *prev)
 		ir_node *pred_block = get_nodes_block(pred);
 
 		/* we don't need labels for fallthrough blocks, however switch-jmps
-		 * are no fallthoughs */
+		 * are no fallthroughs */
 		if(pred_block == prev &&
 				!(is_Proj(pred) && is_ia32_SwitchJmp(get_Proj_pred(pred)))) {
 			need_label = 0;