arm: testsuite: correctly detect hard_float

Add an arm-specific test to check_effective_target_hard_float for
Arm to handle cases where we only have single-precision FP in hardware.

gcc/testsuite:

	* lib/target-supports.exp (check_effective_target_hard_float): Add
	arm-specific test.

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index d414cddf4dcd515dabc1970709ac8934aaf2774e..ee173b9fb6bdf390a9d8b252cef07797457e5c29 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -1420,6 +1420,17 @@ proc check_effective_target_mpaired_single { args } {
 # Return true if the target has access to FPU instructions.
 
 proc check_effective_target_hard_float { } {
+    # This should work on cores that only have single-precision,
+    # and should also correctly handle legacy cores that had thumb1 and
+    # lacked FP support for that, but had it in Arm state.
+    if { [istarget arm*-*-*] } {
+       return [check_no_compiler_messages hard_float assembly {
+               #if __ARM_FP == 0
+               #error __arm_soft_float
+               #endif
+       }]
+    }
+
     if { [istarget loongarch*-*-*] } {
        return [check_no_compiler_messages hard_float assembly {
                #if (defined __loongarch_soft_float)