some MSL_C work (#192)

* wip * bunch of MSL_C files thanks to pikmin2 decomp for their work * format / asm * progress * fix * fix remove-asm to work with C files * init / start
2026-07-11 06:18:46 -07:00 · 2022-04-24 13:02:50 +02:00
parent a1099217d6
commit 589cc12296
154 changed files with 2388 additions and 3088 deletions
@@ -0,0 +1,79 @@
+
+/* @(#)s_modf.c 1.3 95/01/18 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunSoft, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * modf(double x, double *iptr)
+ * return fraction part of x, and return x's integral part in *iptr.
+ * Method:
+ *	Bit twiddling.
+ *
+ * Exception:
+ *	No exception.
+ */
+
+#include "fdlibm.h"
+
+#ifdef __STDC__
+static const double one = 1.0;
+#else
+static double one = 1.0;
+#endif
+
+#ifdef __STDC__
+double modf(double x, double* iptr)
+#else
+double modf(x, iptr) double x, *iptr;
+#endif
+{
+    int i0, i1, j0;
+    unsigned i;
+    i0 = __HI(x);                      /* high x */
+    i1 = __LO(x);                      /* low  x */
+    j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; /* exponent of x */
+    if (j0 < 20) {                     /* integer part in high x */
+        if (j0 < 0) {                  /* |x|<1 */
+            __HIp(iptr) = i0 & 0x80000000;
+            __LOp(iptr) = 0; /* *iptr = +-0 */
+            return x;
+        } else {
+            i = (0x000fffff) >> j0;
+            if (((i0 & i) | i1) == 0) { /* x is integral */
+                *iptr = x;
+                __HI(x) &= 0x80000000;
+                __LO(x) = 0; /* return +-0 */
+                return x;
+            } else {
+                __HIp(iptr) = i0 & (~i);
+                __LOp(iptr) = 0;
+                return x - *iptr;
+            }
+        }
+    } else if (j0 > 51) { /* no fraction part */
+        *iptr = x * one;
+        __HI(x) &= 0x80000000;
+        __LO(x) = 0; /* return +-0 */
+        return x;
+    } else { /* fraction part in low x */
+        i = ((unsigned)(0xffffffff)) >> (j0 - 20);
+        if ((i1 & i) == 0) { /* x is integral */
+            *iptr = x;
+            __HI(x) &= 0x80000000;
+            __LO(x) = 0; /* return +-0 */
+            return x;
+        } else {
+            __HIp(iptr) = i0;
+            __LOp(iptr) = i1 & (~i);
+            return x - *iptr;
+        }
+    }
+}