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* [glibc] LoongArch: Hard Float Support for float-point classification functions.
@ 2022-11-14 2:03 Yinyu Cai
0 siblings, 0 replies; only message in thread
From: Yinyu Cai @ 2022-11-14 2:03 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5fe2647d3168194f3534bbf1c02930c891a25977
commit 5fe2647d3168194f3534bbf1c02930c891a25977
Author: Xiaolin Tang <tangxiaolin@loongson.cn>
Date: Mon Nov 7 22:05:16 2022 +0800
LoongArch: Hard Float Support for float-point classification functions.
Use hardware Floating-point instruction fclass.{s/d} to implement
classification functions, i.e finite{f/ }, fpclassify{f/ }, isnan{f/ },
isinf{f/ }, issignaling{f/ }.
* sysdeps/loongarch/fpu/s_finite.c: New file.
* sysdeps/loongarch/fpu/s_finitef.c: Likewise.
* sysdeps/loongarch/fpu/s_fpclassify.c: Likewise.
* sysdeps/loongarch/fpu/s_fpclassifyf.c: Likewise.
* sysdeps/loongarch/fpu/s_isinf.c: Likewise.
* sysdeps/loongarch/fpu/s_isinff.c: Likewise.
* sysdeps/loongarch/fpu/s_isnan.c: Likewise.
* sysdeps/loongarch/fpu/s_isnanf.c: Likewise.
* sysdeps/loongarch/fpu/s_issignaling.c: Likewise.
* sysdeps/loongarch/fpu/s_issignalingf.c: Likewise.
* sysdeps/loongarch/fpu_control.h: Add _FCLASS_* macro.
Diff:
---
sysdeps/loongarch/fpu/s_finite.c | 30 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_finitef.c | 30 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_fpclassify.c | 38 ++++++++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_fpclassifyf.c | 38 ++++++++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_isinf.c | 30 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_isinff.c | 30 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_isnan.c | 31 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_isnanf.c | 31 +++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_issignaling.c | 29 ++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_issignalingf.c | 29 ++++++++++++++++++++++++++
sysdeps/loongarch/fpu_control.h | 17 +++++++++++++++
11 files changed, 333 insertions(+)
diff --git a/sysdeps/loongarch/fpu/s_finite.c b/sysdeps/loongarch/fpu/s_finite.c
new file mode 100644
index 0000000000..a2e98f0b60
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_finite.c
@@ -0,0 +1,30 @@
+/* finite(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__finite (double x)
+{
+ int x_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return x_cond & ~(_FCLASS_INF | _FCLASS_NAN);
+}
+hidden_def (__finite)
+weak_alias (__finite, finite)
diff --git a/sysdeps/loongarch/fpu/s_finitef.c b/sysdeps/loongarch/fpu/s_finitef.c
new file mode 100644
index 0000000000..9ffab38abd
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_finitef.c
@@ -0,0 +1,30 @@
+/* finitef(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__finitef (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return x_cond & ~(_FCLASS_INF | _FCLASS_NAN);
+}
+hidden_def (__finitef)
+weak_alias (__finitef, finitef)
diff --git a/sysdeps/loongarch/fpu/s_fpclassify.c b/sysdeps/loongarch/fpu/s_fpclassify.c
new file mode 100644
index 0000000000..3f4d95da66
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fpclassify.c
@@ -0,0 +1,38 @@
+/* fpclassify(). LoongArch version.
+ Copyright (C) 2017-2022 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__fpclassify (double x)
+{
+ int cls;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (cls) : "f" (x));
+
+ if (__glibc_likely (!!(cls & _FCLASS_NORM)))
+ return FP_NORMAL;
+ if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
+ return FP_ZERO;
+ if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
+ return FP_SUBNORMAL;
+ if (__glibc_likely (!!(cls & _FCLASS_INF)))
+ return FP_INFINITE;
+ return FP_NAN;
+}
+libm_hidden_def (__fpclassify)
diff --git a/sysdeps/loongarch/fpu/s_fpclassifyf.c b/sysdeps/loongarch/fpu/s_fpclassifyf.c
new file mode 100644
index 0000000000..b7c8b25337
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fpclassifyf.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 2017-2022 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__fpclassifyf (float x)
+{
+ int cls;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (cls) : "f" (x));
+
+ if (__glibc_likely (!!(cls & _FCLASS_NORM)))
+ return FP_NORMAL;
+ if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
+ return FP_ZERO;
+ if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
+ return FP_SUBNORMAL;
+ if (__glibc_likely (!!(cls & _FCLASS_INF)))
+ return FP_INFINITE;
+ return FP_NAN;
+}
+libm_hidden_def (__fpclassifyf)
diff --git a/sysdeps/loongarch/fpu/s_isinf.c b/sysdeps/loongarch/fpu/s_isinf.c
new file mode 100644
index 0000000000..c7a6784185
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_isinf.c
@@ -0,0 +1,30 @@
+/* isinf(). LoongArch version.
+ Copyright (C) 2017-2022 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__isinf (double x)
+{
+ int x_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return -((x_cond & _FCLASS_MINF) ? 1 : 0) | ((x_cond & _FCLASS_PINF) ? 1 : 0);
+}
+hidden_def (__isinf)
+weak_alias (__isinf, isinf)
diff --git a/sysdeps/loongarch/fpu/s_isinff.c b/sysdeps/loongarch/fpu/s_isinff.c
new file mode 100644
index 0000000000..dcb4e04ec8
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_isinff.c
@@ -0,0 +1,30 @@
+/* isinff(). LoongArch version.
+ Copyright (C) 2017-2022 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__isinff (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return -((x_cond & _FCLASS_MINF) ? 1 : 0) | ((x_cond & _FCLASS_PINF) ? 1 : 0);
+}
+hidden_def (__isinff)
+weak_alias (__isinff, isinff)
diff --git a/sysdeps/loongarch/fpu/s_isnan.c b/sysdeps/loongarch/fpu/s_isnan.c
new file mode 100644
index 0000000000..62bb2e2fad
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_isnan.c
@@ -0,0 +1,31 @@
+/* isnan(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__isnan (double x)
+{
+ int x_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+ return (x_cond & _FCLASS_NAN) != 0;
+}
+hidden_def (__isnan)
+weak_alias (__isnan, isnan)
diff --git a/sysdeps/loongarch/fpu/s_isnanf.c b/sysdeps/loongarch/fpu/s_isnanf.c
new file mode 100644
index 0000000000..bbdedb8429
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_isnanf.c
@@ -0,0 +1,31 @@
+/* isnanf(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__isnanf (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+ return (x_cond & _FCLASS_NAN) != 0;
+}
+hidden_def (__isnanf)
+weak_alias (__isnanf, isnanf)
diff --git a/sysdeps/loongarch/fpu/s_issignaling.c b/sysdeps/loongarch/fpu/s_issignaling.c
new file mode 100644
index 0000000000..4fe0e2b7a9
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_issignaling.c
@@ -0,0 +1,29 @@
+/* issignaling(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__issignaling (double x)
+{
+ int x_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return (x_cond & _FCLASS_SNAN) != 0;
+}
+libm_hidden_def (__issignaling)
diff --git a/sysdeps/loongarch/fpu/s_issignalingf.c b/sysdeps/loongarch/fpu/s_issignalingf.c
new file mode 100644
index 0000000000..d82abb0e74
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_issignalingf.c
@@ -0,0 +1,29 @@
+/* issignalingf(). 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/>. */
+
+#include <math.h>
+#include <fenv_private.h>
+
+int
+__issignalingf (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+ return (x_cond & _FCLASS_SNAN) != 0;
+}
+libm_hidden_def (__issignalingf)
diff --git a/sysdeps/loongarch/fpu_control.h b/sysdeps/loongarch/fpu_control.h
index f482395dba..13436335fe 100644
--- a/sysdeps/loongarch/fpu_control.h
+++ b/sysdeps/loongarch/fpu_control.h
@@ -97,6 +97,23 @@ extern void __loongarch_fpu_setcw (fpu_control_t) __THROW;
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
+# define _FCLASS_SNAN (1 << 0)
+# define _FCLASS_QNAN (1 << 1)
+# define _FCLASS_MINF (1 << 2)
+# define _FCLASS_MNORM (1 << 3)
+# define _FCLASS_MSUBNORM (1 << 4)
+# define _FCLASS_MZERO (1 << 5)
+# define _FCLASS_PINF (1 << 6)
+# define _FCLASS_PNORM (1 << 7)
+# define _FCLASS_PSUBNORM (1 << 8)
+# define _FCLASS_PZERO (1 << 9)
+
+# define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO)
+# define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM)
+# define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM)
+# define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF)
+# define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN)
+
#endif /* __loongarch_soft_float */
#endif /* fpu_control.h */
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