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+/* scalb(). LoongArch version.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+#include <libm-alias-finite.h>
+#include <fpu_control.h>
+#include <float.h>
+
+double
+__ieee754_scalb (double x, double fn)
+{
+ int x_cond;
+ int fn_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+ asm volatile ("fclass.d \t%0, %1" : "=f" (fn_cond) : "f" (fn));
+
+ if (__glibc_unlikely(( x_cond | fn_cond) & _FCLASS_NAN))
+ return x * fn;
+ else if (__glibc_unlikely(fn_cond & _FCLASS_INF))
+ {
+ if (!(fn_cond & _FCLASS_MINF))
+ return x * fn;
+ else
+ return x / -fn;
+ }
+ else if (__glibc_likely(-DBL_MAX < fn && fn < DBL_MAX))
+ {
+ long y1;
+ double y;
+
+ asm volatile ("frint.d \t%0, %1" : "=f" (y) : "f" (fn));
+ asm volatile ("ftintrz.l.d \t%0, %1" : "=f" (y) : "f" (y));
+ asm volatile ("movfr2gr.d \t%0, %1" : "=r" (y1) : "f" (y));
+
+ if (y1 != fn )
+ return (x - x) / (x - x);
+
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
+ }
+ else
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (fn));
+
+ return x;
+}
+libm_alias_finite (__ieee754_scalb, __scalb)
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+/* scalbf(). LoongArch version.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+#include <libm-alias-finite.h>
+#include <fpu_control.h>
+#include <float.h>
+
+float
+__ieee754_scalbf (float x, float fn)
+{
+ int x_cond;
+ int fn_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+ asm volatile ("fclass.s \t%0, %1" : "=f" (fn_cond) : "f" (fn));
+
+ if (__glibc_unlikely(( x_cond | fn_cond) & _FCLASS_NAN))
+ return x * fn;
+ else if (__glibc_unlikely(fn_cond & _FCLASS_INF))
+ {
+ if (!(fn_cond & _FCLASS_MINF))
+ return x * fn;
+ else
+ return x / -fn;
+ }
+ else if (__glibc_likely(-FLT_MAX < fn && fn < FLT_MAX))
+ {
+ int y1;
+ float y;
+
+ asm volatile ("frint.s \t%0, %1" : "=f" (y) : "f" (fn));
+ asm volatile ("ftintrz.w.s \t%0, %1" : "=f" (y) : "f" (y));
+ asm volatile ("movfr2gr.s \t%0, %1" : "=r" (y1) : "f" (y));
+
+ if (y1 != fn )
+ return (x - x) / (x - x);
+
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
+ }
+ else
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (fn));
+
+ return x;
+}
+libm_alias_finite (__ieee754_scalb, __scalb)
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+/* scalbn(). LoongArch version.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+
+double
+__scalbn (double x, int fn)
+{
+ double tmp;
+ asm volatile ("movgr2fr.d \t%0, %1" : "=f" (tmp) : "r" (fn));
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ return x;
+}
new file mode 100644
@@ -0,0 +1,29 @@
+/* scalbnf(). LoongArch version.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+
+float
+__scalbnf (float x, int fn)
+{
+ float tmp;
+ asm volatile ("movgr2fr.w \t%0, %1" : "=f" (tmp) : "r" (fn));
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ return x;
+}