test: add loongarch64-linux-muslsf to test-c-abi matrix

test/c_abi/cfuncs.c

@@ -64,6 +64,10 @@ static void assert_or_panic(bool ok) {
 #  define ZIG_NO_COMPLEX
 #endif
 
+#if defined(__loongarch__) && defined(__loongarch_soft_float)
+#  define ZIG_NO_COMPLEX
+#endif
+
 #ifdef __powerpc__
 #  define ZIG_NO_COMPLEX
 #endif

test/c_abi/main.zig

@@ -187,7 +187,8 @@ extern fn c_cmultd(a: ComplexDouble, b: ComplexDouble) ComplexDouble;
 const complex_abi_compatible = builtin.cpu.arch != .x86 and !builtin.cpu.arch.isMIPS() and
     !builtin.cpu.arch.isArm() and !builtin.cpu.arch.isPowerPC32() and !builtin.cpu.arch.isRISCV() and
     builtin.cpu.arch != .hexagon and
-    builtin.cpu.arch != .s390x;
+    builtin.cpu.arch != .s390x and
+    !(builtin.cpu.arch.isLoongArch() and builtin.abi.float() == .soft);
 
 test "C ABI complex float" {
     if (!complex_abi_compatible) return error.SkipZigTest;
@@ -5611,6 +5612,7 @@ test "C ABI pointer sized float struct" {
     if (builtin.cpu.arch.isMIPS64()) return error.SkipZigTest;
     if (builtin.cpu.arch.isPowerPC32()) return error.SkipZigTest;
     if (builtin.cpu.arch.isArm() and builtin.abi.float() == .soft) return error.SkipZigTest;
+    if (builtin.cpu.arch.isLoongArch() and builtin.abi.float() == .soft) return error.SkipZigTest;
     if (builtin.cpu.arch == .s390x) return error.SkipZigTest;
 
     c_ptr_size_float_struct(.{ .x = 1, .y = 2 });

test/tests.zig

@@ -1764,6 +1764,13 @@ const c_abi_targets = blk: {
                 .abi = .musl,
             },
         },
+        .{
+            .target = .{
+                .cpu_arch = .loongarch64,
+                .os_tag = .linux,
+                .abi = .muslsf,
+            },
+        },
 
         .{
             .target = .{