ldso: support DT_RELR relative relocation format

[musl] / src / internal / libm.h

diff --git a/src/internal/libm.h b/src/internal/libm.h
index 09fcfde..72ad17d 100644 (file)
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -59,6 +59,43 @@ union ldshape {
 #error Unsupported long double representation
 #endif
 
+/* Support non-nearest rounding mode.  */
+#define WANT_ROUNDING 1
+/* Support signaling NaNs.  */
+#define WANT_SNAN 0
+
+#if WANT_SNAN
+#error SNaN is unsupported
+#else
+#define issignalingf_inline(x) 0
+#define issignaling_inline(x) 0
+#endif
+
+#ifndef TOINT_INTRINSICS
+#define TOINT_INTRINSICS 0
+#endif
+
+#if TOINT_INTRINSICS
+/* Round x to nearest int in all rounding modes, ties have to be rounded
+   consistently with converttoint so the results match.  If the result
+   would be outside of [-2^31, 2^31-1] then the semantics is unspecified.  */
+static double_t roundtoint(double_t);
+
+/* Convert x to nearest int in all rounding modes, ties have to be rounded
+   consistently with roundtoint.  If the result is not representible in an
+   int32_t then the semantics is unspecified.  */
+static int32_t converttoint(double_t);
+#endif
+
+/* Helps static branch prediction so hot path can be better optimized.  */
+#ifdef __GNUC__
+#define predict_true(x) __builtin_expect(!!(x), 1)
+#define predict_false(x) __builtin_expect(x, 0)
+#else
+#define predict_true(x) (x)
+#define predict_false(x) (x)
+#endif
+
 /* Evaluate an expression as the specified type. With standard excess
    precision handling a type cast or assignment is enough (with
    -ffloat-store an assignment is required, in old compilers argument
@@ -117,7 +154,8 @@ static inline long double fp_barrierl(long double x)
 #define fp_force_evalf fp_force_evalf
 static inline void fp_force_evalf(float x)
 {
-       volatile float y = x;
+       volatile float y;
+       y = x;
 }
 #endif
 
@@ -125,7 +163,8 @@ static inline void fp_force_evalf(float x)
 #define fp_force_eval fp_force_eval
 static inline void fp_force_eval(double x)
 {
-       volatile double y = x;
+       volatile double y;
+       y = x;
 }
 #endif
 
@@ -133,7 +172,8 @@ static inline void fp_force_eval(double x)
 #define fp_force_evall fp_force_evall
 static inline void fp_force_evall(long double x)
 {
-       volatile long double y = x;
+       volatile long double y;
+       y = x;
 }
 #endif
 
@@ -196,13 +236,13 @@ hidden int    __rem_pio2(double,double*);
 hidden double __sin(double,double,int);
 hidden double __cos(double,double);
 hidden double __tan(double,double,int);
-hidden double __expo2(double);
+hidden double __expo2(double,double);
 
 hidden int    __rem_pio2f(float,double*);
 hidden float  __sindf(double);
 hidden float  __cosdf(double);
 hidden float  __tandf(double,int);
-hidden float  __expo2f(float);
+hidden float  __expo2f(float,float);
 
 hidden int __rem_pio2l(long double, long double *);
 hidden long double __sinl(long double, long double, int);
@@ -216,4 +256,19 @@ extern int __signgam;
 hidden double __lgamma_r(double, int *);
 hidden float __lgammaf_r(float, int *);
 
+/* error handling functions */
+hidden float __math_xflowf(uint32_t, float);
+hidden float __math_uflowf(uint32_t);
+hidden float __math_oflowf(uint32_t);
+hidden float __math_divzerof(uint32_t);
+hidden float __math_invalidf(float);
+hidden double __math_xflow(uint32_t, double);
+hidden double __math_uflow(uint32_t);
+hidden double __math_oflow(uint32_t);
+hidden double __math_divzero(uint32_t);
+hidden double __math_invalid(double);
+#if LDBL_MANT_DIG != DBL_MANT_DIG
+hidden long double __math_invalidl(long double);
+#endif
+
 #endif