[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/lib/libm/e_rem_pio2f.c b/src/bsp/lk/lib/libm/e_rem_pio2f.c
new file mode 100644
index 0000000..b068466
--- /dev/null
+++ b/src/bsp/lk/lib/libm/e_rem_pio2f.c
@@ -0,0 +1,86 @@
+/* e_rem_pio2f.c -- float version of e_rem_pio2.c
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * Debugged and optimized by Bruce D. Evans.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/* __ieee754_rem_pio2f(x,y)
+ *
+ * return the remainder of x rem pi/2 in *y
+ * use double precision for everything except passing x
+ * use __kernel_rem_pio2() for large x
+ */
+
+#include <float.h>
+
+#include "math.h"
+#include "math_private.h"
+
+/*
+ * invpio2: 53 bits of 2/pi
+ * pio2_1: first 25 bits of pi/2
+ * pio2_1t: pi/2 - pio2_1
+ */
+
+static const double
+invpio2 = 6.36619772367581382433e-01, /* 0x3FE45F30, 0x6DC9C883 */
+pio2_1 = 1.57079631090164184570e+00, /* 0x3FF921FB, 0x50000000 */
+pio2_1t = 1.58932547735281966916e-08; /* 0x3E5110b4, 0x611A6263 */
+
+#ifdef INLINE_REM_PIO2F
+static __inline __always_inline
+#endif
+int
+__ieee754_rem_pio2f(float x, double *y)
+{
+ double w,r,fn;
+ double tx[1],ty[1];
+ float z;
+ int32_t e0,n,ix,hx;
+
+ GET_FLOAT_WORD(hx,x);
+ ix = hx&0x7fffffff;
+ /* 33+53 bit pi is good enough for medium size */
+ if (ix<0x4dc90fdb) { /* |x| ~< 2^28*(pi/2), medium size */
+ /* Use a specialized rint() to get fn. Assume round-to-nearest. */
+ STRICT_ASSIGN(double,fn,x*invpio2+0x1.8p52);
+ fn = fn-0x1.8p52;
+#ifdef HAVE_EFFICIENT_IRINT
+ n = irint(fn);
+#else
+ n = (int32_t)fn;
+#endif
+ r = x-fn*pio2_1;
+ w = fn*pio2_1t;
+ *y = r-w;
+ return n;
+ }
+ /*
+ * all other (large) arguments
+ */
+ if (ix>=0x7f800000) { /* x is inf or NaN */
+ *y=x-x;
+ return 0;
+ }
+ /* set z = scalbn(|x|,ilogb(|x|)-23) */
+ e0 = (ix>>23)-150; /* e0 = ilogb(|x|)-23; */
+ SET_FLOAT_WORD(z, ix - ((int32_t)(e0<<23)));
+ tx[0] = z;
+ n = __kernel_rem_pio2(tx,ty,e0,1,0);
+ if (hx<0) {*y = -ty[0]; return -n;}
+ *y = ty[0];
+ return n;
+}