@item wf
VSX vector register to hold vector float data
+@item wg
+If @option{-mmfpgpr} was used, a floating point register
+
+@item wl
+If the LFIWAX instruction is enabled, a floating point register
+
@item ws
VSX vector register to hold scalar float data
+@item wt
+VSX vector register to hold 128 bit integer
+
+@item wx
+If the STFIWX instruction is enabled, a floating point register
+
+@item wz
+If the LFIWZX instruction is enabled, a floating point register
+
@item wa
Any VSX register