[gcc(refs/users/meissner/heads/work171-bugs)] Do not add -mvsx or -mfloat128 when testing the float128 support.

[Michael Meissner via Gcc-cvs]

https://gcc.gnu.org/g:7b9d4c1b70a4690dcd91af5b756b1eccf06cc12d

commit 7b9d4c1b70a4690dcd91af5b756b1eccf06cc12d
Author: Michael Meissner <meiss...@linux.ibm.com>
Date:   Tue Jul 16 17:19:27 2024 -0400

    Do not add -mvsx or -mfloat128 when testing the float128 support.
    
    2024-07-16 Michael Meissner  <meiss...@linux.ibm.com>
    
    gcc/testsuite/
    
            PR target/115800
            PR target/113652
            * lib/target-supports.exp (check_ppc_float128_sw_available): Do not 
add
            -mfloat128 or -mfloat128-hardware.
            (check_ppc_float128_hw_available): Likewise.
            (check_effective_target_ppc_ieee128_ok): Likewise.
            (add_options_for___float128): Likewise.
            (check_effective_target_powerpc_float128_sw_ok): Likewise.
            (check_effective_target_powerpc_float128_hw_ok): Likewise.

Diff:
---
 gcc/testsuite/lib/target-supports.exp | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index bd8416a51886..beb8e2877e57 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2979,7 +2979,6 @@ proc check_ppc_float128_sw_available { } {
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
-           set options "-mfloat128"
            check_runtime_nocache ppc_float128_sw_available {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
@@ -2988,7 +2987,7 @@ proc check_ppc_float128_sw_available { } {
                    __float128 z = x + y;
                    return (z != 3.0q);
                }
-           } $options
+           } ""
        }
     }]
 }
@@ -3005,7 +3004,6 @@ proc check_ppc_float128_hw_available { } {
             || [istarget *-*-darwin*]} {
            expr 0
        } else {
-           set options "-mfloat128 -mfloat128-hardware -mcpu=power9"
            check_runtime_nocache ppc_float128_hw_available {
                volatile __float128 x = 1.0q;
                volatile __float128 y = 2.0q;
@@ -3017,7 +3015,7 @@ proc check_ppc_float128_hw_available { } {
                    __asm__ ("xsaddqp %0,%1,%2" : "+v" (w) : "v" (x), "v" (y));
                    return ((z != 3.0q) || (z != w));
                }
-           } $options
+           } ""
        }
     }]
 }
@@ -3030,14 +3028,13 @@ proc check_effective_target_ppc_ieee128_ok { } {
             || [istarget *-*-vxworks*]} {
            expr 0
        } else {
-           set options "-mfloat128"
            check_runtime_nocache ppc_ieee128_ok {
                int main()
                {
                  __ieee128 a;
                  return 0;
                }
-           } $options
+           } ""
        }
     }]
 }
@@ -3946,9 +3943,6 @@ proc check_effective_target___float128 { } {
 }
 
 proc add_options_for___float128 { flags } {
-    if { [istarget powerpc*-*-linux*] } {
-       return "$flags -mfloat128"
-    }
     return "$flags"
 }
 
@@ -7217,8 +7211,9 @@ proc check_effective_target_power10_ok { } {
     }
 }
 
-# Return 1 if this is a PowerPC target supporting -mfloat128 via either
-# software emulation on power7/power8 systems or hardware support on power9.
+# Return 1 if this is a PowerPC target supporting IEEE 128-bit floating point
+# via either software emulation on power7/power8 systems or hardware support on
+# power9.
 
 proc check_effective_target_powerpc_float128_sw_ok { } {
     if { [istarget powerpc*-*-*]
@@ -7234,14 +7229,14 @@ proc check_effective_target_powerpc_float128_sw_ok { } {
                    __float128 z = x + y;
                    return (z == 3.0q);
                }
-           } "-mfloat128"]
+           } ""]
     } else {
        return 0
     }
 }
 
-# Return 1 if this is a PowerPC target supporting -mfloat128 via hardware
-# support on power9.
+# Return 1 if this is a PowerPC target supporting IEEE 128-bit floating point
+# via hardware support on power9 and later systems.
 
 proc check_effective_target_powerpc_float128_hw_ok { } {
     if { [istarget powerpc*-*-*]
@@ -7258,7 +7253,7 @@ proc check_effective_target_powerpc_float128_hw_ok { } {
                    __asm__ ("xsaddqp %0,%1,%2" : "=v" (z) : "v" (x), "v" (y));
                    return (z == 3.0q);
                }
-       } "-mfloat128-hardware"]
+       } ""]
     } else {
        return 0
     }