SAV_ISCTR
blks = MAX(4, SAV_ISCTR(sav) && VNET(esp_ctr_compatibility) ?
#define SAV_ISCTRORGCM(_sav) (SAV_ISCTR((_sav)) || SAV_ISGCM((_sav)))
if (SAV_ISCTR(sav)) {
if (SAV_ISCTR(sav) && V_esp_ctr_compatibility)
if (SAV_ISCTR(sav)) {