Re: gas: support NaN flavors

Fixes tic4x-coff FAIL: simple FP constants

	* testsuite/gas/all/float.s: Make NaN tests conditional on hasnan.
	* testsuite/gas/all/gas.exp: Define hasnan.

gas/testsuite/gas/all/float.s

@@ -8,9 +8,11 @@ foo:	.single	0r1.2345e+06
 	.dc.s 1
 	.dc.s 0f:1234
 	.dc.s Inf
+ .ifdef hasnan
 	.dc.s NaN
 	.dc.s QNaN
 	.dc.s SNaN
+ .endif
 	.dcb.s 1
 	.dcb.s 1, 1
 	.dcb.s 1, 0s:4321
@@ -19,9 +21,11 @@ foo:	.single	0r1.2345e+06
 	.dc.d 1
 	.dc.d 0d:1234
 	.dc.d +Inf
+ .ifdef hasnan
 	.dc.d -NaN
 	.dc.d +QNaN
 	.dc.d -SNaN
+ .endif
 	.dcb.d 1
 	.dcb.d 1, 1
 	.dcb.d 1, 0r:4321

gas/testsuite/gas/all/gas.exp

@@ -45,7 +45,12 @@ if { [istarget hppa*-*-*] || [istarget *c54x*-*-*] || [istarget mep*-*-*]} then
 # No floating point support in assembly code for CRIS and Z80.
 if { ![istarget cris-*-*] && ![istarget crisv32-*-*] 
      && ![istarget z80-*-*] } then {
-    gas_test "float.s" ""   "" "simple FP constants"
+    if { [istarget tic4x-*-*] } then {
+	set as_opt ""
+    } else {
+	set as_opt "--defsym hasnan=1"
+    }
+    gas_test "float.s" $as_opt "" "simple FP constants"
 }
 
 # This test is meaningless for the PA; the difference of two undefined