!822 Change musl x86_64 long double format into ld128

Merge pull request !822 from guzhihao4/x86_64-ld128

musl_src.gni

@@ -143,6 +143,7 @@ if (musl_arch == "arm") {
   ]
 } else if (musl_arch == "x86_64") {
   musl_src_arch_file = [
+    "arch/x86_64/bits/float.h",
     "src/fenv/x86_64/fenv.s",
     "src/ldso/x86_64/dlsym.s",
     "src/ldso/x86_64/tlsdesc.s",

porting/linux/user/arch/x86_64/bits/float.h

+#ifdef __FLT_EVAL_METHOD__
+#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
+#else
+#define FLT_EVAL_METHOD 0
+#endif
+
+#define LDBL_TRUE_MIN 6.47517511943802511092443895822764655e-4966L
+#define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
+#define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
+#define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
+
+#define LDBL_MANT_DIG 113
+#define LDBL_MIN_EXP (-16381)
+#define LDBL_MAX_EXP 16384
+
+#define LDBL_DIG 33
+#define LDBL_MIN_10_EXP (-4931)
+#define LDBL_MAX_10_EXP 4932
+
+#define DECIMAL_DIG 36