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-rw-r--r--extra/Configs/Config.in.arch1
-rw-r--r--libc/sysdeps/linux/sh/bits/fenv.h60
-rw-r--r--libc/sysdeps/linux/sh/fpu_control.h30
-rw-r--r--libm/sh/sh4/Makefile.arch2
-rw-r--r--libm/sh/sh4/fclrexcpt.c39
-rw-r--r--libm/sh/sh4/fedisblxcpt.c37
-rw-r--r--libm/sh/sh4/feenablxcpt.c36
-rw-r--r--libm/sh/sh4/fegetenv.c30
-rw-r--r--libm/sh/sh4/fegetexcept.c30
-rw-r--r--libm/sh/sh4/fegetmode.c26
-rw-r--r--libm/sh/sh4/fegetround.c30
-rw-r--r--libm/sh/sh4/feholdexcpt.c37
-rw-r--r--libm/sh/sh4/fesetenv.c28
-rw-r--r--libm/sh/sh4/fesetexcept.c31
-rw-r--r--libm/sh/sh4/fesetmode.c37
-rw-r--r--libm/sh/sh4/fesetround.c40
-rw-r--r--libm/sh/sh4/feupdateenv.c36
-rw-r--r--libm/sh/sh4/fgetexcptflg.c37
-rw-r--r--libm/sh/sh4/fraiseexcpt.c70
-rw-r--r--libm/sh/sh4/fsetexcptflg.c38
-rw-r--r--libm/sh/sh4/ftestexcept.c30
21 files changed, 646 insertions, 59 deletions
diff --git a/extra/Configs/Config.in.arch b/extra/Configs/Config.in.arch
index 62ba4819e..df6b795fa 100644
--- a/extra/Configs/Config.in.arch
+++ b/extra/Configs/Config.in.arch
@@ -175,6 +175,7 @@ config UCLIBC_HAS_FENV
(TARGET_powerpc && CONFIG_E500) || \
TARGET_riscv32 || \
TARGET_riscv64 || \
+ (TARGET_sh && (CONFIG_SH4 || CONFIG_SH4A)) || \
TARGET_sparc || \
TARGET_x86_64
help
diff --git a/libc/sysdeps/linux/sh/bits/fenv.h b/libc/sysdeps/linux/sh/bits/fenv.h
index 38c303ff2..349e7ddde 100644
--- a/libc/sysdeps/linux/sh/bits/fenv.h
+++ b/libc/sysdeps/linux/sh/bits/fenv.h
@@ -1,5 +1,4 @@
-/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+/* Copyright (C) 1999-2025 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -13,7 +12,7 @@
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
@@ -24,34 +23,39 @@
of the appropriate bits in the FPU control word. */
enum
{
- FE_INEXACT = 0x04,
-#define FE_INEXACT FE_INEXACT
- FE_UNDERFLOW = 0x08,
-#define FE_UNDERFLOW FE_UNDERFLOW
- FE_OVERFLOW = 0x10,
-#define FE_OVERFLOW FE_OVERFLOW
- FE_DIVBYZERO = 0x20,
-#define FE_DIVBYZERO FE_DIVBYZERO
- FE_INVALID = 0x40,
-#define FE_INVALID FE_INVALID
+ FE_INEXACT =
+#define FE_INEXACT 0x04
+ FE_INEXACT,
+ FE_UNDERFLOW =
+#define FE_UNDERFLOW 0x08
+ FE_UNDERFLOW,
+ FE_OVERFLOW =
+#define FE_OVERFLOW 0x10
+ FE_OVERFLOW,
+ FE_DIVBYZERO =
+#define FE_DIVBYZERO 0x20
+ FE_DIVBYZERO,
+ FE_INVALID =
+#define FE_INVALID 0x40
+ FE_INVALID,
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
-/* The SH FPU supports all of the four defined rounding modes. We
- use again the bit positions in the FPU control word as the values
- for the appropriate macros. */
+/* The SH FPU supports two of the four defined rounding modes: round to nearest
+ and round to zero. We use again the bit positions in the FPU control word
+ as the values for the appropriate macros. */
enum
{
- FE_TONEAREST = 0x0,
-#define FE_TONEAREST FE_TONEAREST
- FE_TOWARDZERO = 0x1,
-#define FE_TOWARDZERO FE_TOWARDZERO
- FE_UPWARD = 0x2,
-#define FE_UPWARD FE_UPWARD
- FE_DOWNWARD = 0x3
-#define FE_DOWNWARD FE_DOWNWARD
+ __FE_UNDEFINED = -1,
+
+ FE_TONEAREST =
+#define FE_TONEAREST 0x0
+ FE_TONEAREST,
+ FE_TOWARDZERO =
+#define FE_TOWARDZERO 0x1
+ FE_TOWARDZERO,
};
@@ -68,4 +72,10 @@ typedef struct
fenv_t;
/* If the default argument is used we use this value. */
-#define FE_DFL_ENV ((fenv_t *) -1)
+#define FE_DFL_ENV ((const fenv_t *) -1)
+
+/* Type representing floating-point control modes. */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes. */
+# define FE_DFL_MODE ((const femode_t *) -1L)
diff --git a/libc/sysdeps/linux/sh/fpu_control.h b/libc/sysdeps/linux/sh/fpu_control.h
index 8143041fe..d5f401f91 100644
--- a/libc/sysdeps/linux/sh/fpu_control.h
+++ b/libc/sysdeps/linux/sh/fpu_control.h
@@ -1,6 +1,5 @@
/* FPU control word definitions. SH version.
- Copyright (C) 1999, 2000, 2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+ Copyright (C) 1999-2025 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -14,14 +13,23 @@
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H
-#ifndef __SH4__
-#error This file is only correct for sh4
-#endif
+#if !defined(__SH_FPU_ANY__)
+
+#define _FPU_RESERVED 0xffffffff
+#define _FPU_DEFAULT 0x00000000
+typedef unsigned int fpu_control_t;
+#define _FPU_GETCW(cw) (cw) = 0
+#define _FPU_SETCW(cw) (void) (cw)
+extern fpu_control_t __fpu_control;
+
+#else
+
+#include <features.h>
/* masking of interrupts */
#define _FPU_MASK_VM 0x0800 /* Invalid operation */
@@ -48,16 +56,20 @@ typedef unsigned int fpu_control_t;
#define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw))
#if defined __GNUC__
-/* GCC provides this function */
+__BEGIN_DECLS
+
+/* GCC provides this function. */
extern void __set_fpscr (unsigned long);
#define _FPU_SETCW(cw) __set_fpscr ((cw))
#else
#define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw))
#endif
-#if 0
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
-#endif
+
+__END_DECLS
+
+#endif /* __SH_FPU_ANY__ */
#endif /* _FPU_CONTROL_H */
diff --git a/libm/sh/sh4/Makefile.arch b/libm/sh/sh4/Makefile.arch
index e38e99c15..69996edda 100644
--- a/libm/sh/sh4/Makefile.arch
+++ b/libm/sh/sh4/Makefile.arch
@@ -8,7 +8,7 @@
ifeq ($(UCLIBC_HAS_FENV),y)
libm_ARCH_CSRC:=$(wildcard $(libm_SUBARCH_DIR)/*.c)
-libm_ARCH_COBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.c,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_SRC))
+libm_ARCH_COBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.c,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_CSRC))
libm_ARCH_SSRC:=$(wildcard $(libm_SUBARCH_DIR)/*.S)
libm_ARCH_SOBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.S,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_SSRC))
endif
diff --git a/libm/sh/sh4/fclrexcpt.c b/libm/sh/sh4/fclrexcpt.c
new file mode 100644
index 000000000..286b4f36a
--- /dev/null
+++ b/libm/sh/sh4/fclrexcpt.c
@@ -0,0 +1,39 @@
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 1998-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feclearexcept (int excepts)
+{
+ fpu_control_t cw;
+
+ /* Mask out unsupported bits/exceptions. */
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Read the complete control word. */
+ _FPU_GETCW (cw);
+
+ /* Clear exception bits. */
+ cw &= ~excepts;
+
+ /* Put the new data in effect. */
+ _FPU_SETCW (cw);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fedisblxcpt.c b/libm/sh/sh4/fedisblxcpt.c
new file mode 100644
index 000000000..69f9ff2c4
--- /dev/null
+++ b/libm/sh/sh4/fedisblxcpt.c
@@ -0,0 +1,37 @@
+/* Disable floating-point exceptions.
+ Copyright (C) 2012-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fedisableexcept (int excepts)
+{
+ fpu_control_t temp, old_exc;
+
+ /* Get the current control register contents. */
+ _FPU_GETCW (temp);
+
+ old_exc = (temp >> 5) & FE_ALL_EXCEPT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ temp &= ~(excepts << 5);
+ _FPU_SETCW (temp);
+
+ return old_exc;
+}
diff --git a/libm/sh/sh4/feenablxcpt.c b/libm/sh/sh4/feenablxcpt.c
new file mode 100644
index 000000000..bf2b01f0b
--- /dev/null
+++ b/libm/sh/sh4/feenablxcpt.c
@@ -0,0 +1,36 @@
+/* Enable floating-point exceptions.
+ Copyright (C) 2012-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feenableexcept (int excepts)
+{
+ fpu_control_t temp, old_flag;
+
+ /* Get current exceptions. */
+ _FPU_GETCW (temp);
+
+ old_flag = (temp >> 5) & FE_ALL_EXCEPT;
+ excepts &= FE_ALL_EXCEPT;
+
+ temp |= excepts << 5;
+ _FPU_SETCW (temp);
+
+ return old_flag;
+}
diff --git a/libm/sh/sh4/fegetenv.c b/libm/sh/sh4/fegetenv.c
new file mode 100644
index 000000000..d76964f8b
--- /dev/null
+++ b/libm/sh/sh4/fegetenv.c
@@ -0,0 +1,30 @@
+/* Store current floating-point environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetenv (fenv_t *envp)
+{
+ fpu_control_t temp;
+ _FPU_GETCW (temp);
+
+ envp->__fpscr = temp;
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fegetexcept.c b/libm/sh/sh4/fegetexcept.c
new file mode 100644
index 000000000..85f783520
--- /dev/null
+++ b/libm/sh/sh4/fegetexcept.c
@@ -0,0 +1,30 @@
+/* Get enabled floating-point exceptions.
+ Copyright (C) 2012-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetexcept (void)
+{
+ fpu_control_t temp;
+
+ /* Get current exceptions. */
+ _FPU_GETCW (temp);
+
+ return (temp >> 5) & FE_ALL_EXCEPT;
+}
diff --git a/libm/sh/sh4/fegetmode.c b/libm/sh/sh4/fegetmode.c
new file mode 100644
index 000000000..16deb5183
--- /dev/null
+++ b/libm/sh/sh4/fegetmode.c
@@ -0,0 +1,26 @@
+/* Store current floating-point control modes. SH4 version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetmode (femode_t *modep)
+{
+ _FPU_GETCW (*modep);
+ return 0;
+}
diff --git a/libm/sh/sh4/fegetround.c b/libm/sh/sh4/fegetround.c
new file mode 100644
index 000000000..b7c26eb6f
--- /dev/null
+++ b/libm/sh/sh4/fegetround.c
@@ -0,0 +1,30 @@
+/* Return current rounding direction.
+ Copyright (C) 1998-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetround (void)
+{
+ fpu_control_t cw;
+
+ /* Get control word. */
+ _FPU_GETCW (cw);
+
+ return cw & 0x1;
+}
diff --git a/libm/sh/sh4/feholdexcpt.c b/libm/sh/sh4/feholdexcpt.c
index 70b51e8dd..fc462b403 100644
--- a/libm/sh/sh4/feholdexcpt.c
+++ b/libm/sh/sh4/feholdexcpt.c
@@ -1,13 +1,19 @@
-/*
- *
- * Copyright (c) 2007 STMicroelectronics Ltd
- * Filippo Arcidiacono (filippo.arcidiacono@st.com)
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- *
- * Taken from glibc 2.6
- *
- */
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
#include <fpu_control.h>
@@ -15,15 +21,20 @@
int
feholdexcept (fenv_t *envp)
{
- unsigned long int temp;
+ fpu_control_t temp;
/* Store the environment. */
_FPU_GETCW (temp);
envp->__fpscr = temp;
- /* Now set all exceptions to non-stop. */
+ /* Clear the status flags. */
temp &= ~FE_ALL_EXCEPT;
+
+ /* Now set all exceptions to non-stop. */
+ temp &= ~(FE_ALL_EXCEPT << 5);
+
_FPU_SETCW (temp);
- return 1;
+ /* Success. */
+ return 0;
}
diff --git a/libm/sh/sh4/fesetenv.c b/libm/sh/sh4/fesetenv.c
index c5cfc1d51..6a9a68090 100644
--- a/libm/sh/sh4/fesetenv.c
+++ b/libm/sh/sh4/fesetenv.c
@@ -1,13 +1,19 @@
-/*
- *
- * Copyright (c) 2007 STMicroelectronics Ltd
- * Filippo Arcidiacono (filippo.arcidiacono@st.com)
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- *
- * Taken from glibc 2.6
- *
- */
+/* Install given floating-point environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
#include <fpu_control.h>
@@ -19,7 +25,7 @@ fesetenv (const fenv_t *envp)
_FPU_SETCW (_FPU_DEFAULT);
else
{
- unsigned long int temp = envp->__fpscr;
+ fpu_control_t temp = envp->__fpscr;
_FPU_SETCW (temp);
}
return 0;
diff --git a/libm/sh/sh4/fesetexcept.c b/libm/sh/sh4/fesetexcept.c
new file mode 100644
index 000000000..eceb0bb4f
--- /dev/null
+++ b/libm/sh/sh4/fesetexcept.c
@@ -0,0 +1,31 @@
+/* Set given exception flags. SH4 version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetexcept (int excepts)
+{
+ fpu_control_t temp;
+
+ _FPU_GETCW (temp);
+ temp |= (excepts & FE_ALL_EXCEPT);
+ _FPU_SETCW (temp);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fesetmode.c b/libm/sh/sh4/fesetmode.c
new file mode 100644
index 000000000..073da0984
--- /dev/null
+++ b/libm/sh/sh4/fesetmode.c
@@ -0,0 +1,37 @@
+/* Install given floating-point control modes. SH4 version.
+ Copyright (C) 2016-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+#define FPU_STATUS 0x3f07c
+
+int
+fesetmode (const femode_t *modep)
+{
+ fpu_control_t fpscr;
+
+ _FPU_GETCW (fpscr);
+ fpscr &= FPU_STATUS;
+ if (modep == FE_DFL_MODE)
+ fpscr |= _FPU_DEFAULT;
+ else
+ fpscr |= *modep & ~FPU_STATUS;
+ _FPU_SETCW (fpscr);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fesetround.c b/libm/sh/sh4/fesetround.c
new file mode 100644
index 000000000..144eca86f
--- /dev/null
+++ b/libm/sh/sh4/fesetround.c
@@ -0,0 +1,40 @@
+/* Set current rounding direction.
+ Copyright (C) 1998-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetround (int round)
+{
+ fpu_control_t cw;
+
+ if ((round & ~0x1) != 0)
+ /* ROUND is no valid rounding mode. */
+ return 1;
+
+ /* Get current state. */
+ _FPU_GETCW (cw);
+
+ /* Set rounding bits. */
+ cw &= ~0x1;
+ cw |= round;
+ /* Set new state. */
+ _FPU_SETCW (cw);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/feupdateenv.c b/libm/sh/sh4/feupdateenv.c
new file mode 100644
index 000000000..cb7e95259
--- /dev/null
+++ b/libm/sh/sh4/feupdateenv.c
@@ -0,0 +1,36 @@
+/* Install given floating-point environment and raise exceptions.
+ Copyright (C) 2012-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feupdateenv (const fenv_t *envp)
+{
+ fpu_control_t temp;
+
+ _FPU_GETCW (temp);
+ temp = (temp & FE_ALL_EXCEPT);
+
+ /* Raise the saved exception. Incidentally for us the implementation
+ defined format of the values in objects of type fexcept_t is the
+ same as the ones specified using the FE_* constants. */
+ fesetenv (envp);
+ feraiseexcept ((int) temp);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fgetexcptflg.c b/libm/sh/sh4/fgetexcptflg.c
new file mode 100644
index 000000000..308b5ad44
--- /dev/null
+++ b/libm/sh/sh4/fgetexcptflg.c
@@ -0,0 +1,37 @@
+/* Store current representation for exceptions.
+ Copyright (C) 2013-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+ fpu_control_t temp;
+
+ /* Get the current exceptions. */
+ _FPU_GETCW (temp);
+
+ /* We only save the relevant bits here. In particular, care has to be
+ taken with the CAUSE bits, as an inadvertent restore later on could
+ generate unexpected exceptions. */
+
+ *flagp = temp & excepts & FE_ALL_EXCEPT;
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/sh/sh4/fraiseexcpt.c b/libm/sh/sh4/fraiseexcpt.c
new file mode 100644
index 000000000..1ed495b7a
--- /dev/null
+++ b/libm/sh/sh4/fraiseexcpt.c
@@ -0,0 +1,70 @@
+/* Raise given exceptions.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <float.h>
+#include <fpu_control.h>
+#include <math.h>
+
+int
+feraiseexcept (int excepts)
+{
+ if (excepts == 0)
+ return 0;
+
+ /* Raise exceptions represented by EXPECTS. */
+
+ if (excepts & FE_INEXACT)
+ {
+ double d = 1.0, x = 3.0;
+ __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+ }
+
+ if (excepts & FE_UNDERFLOW)
+ {
+ long double d = LDBL_MIN, x = 10;
+ __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+ }
+
+ if (excepts & FE_OVERFLOW)
+ {
+ long double d = LDBL_MAX;
+ __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d));
+ }
+
+ if (excepts & FE_DIVBYZERO)
+ {
+ double d = 1.0, x = 0.0;
+ __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+ }
+
+ if (excepts & FE_INVALID)
+ {
+ double d = HUGE_VAL, x = 0.0;
+ __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x));
+ }
+
+ {
+ /* Restore flag fields. */
+ fpu_control_t cw;
+ _FPU_GETCW (cw);
+ cw |= (excepts & FE_ALL_EXCEPT);
+ _FPU_SETCW (cw);
+ }
+
+ return 0;
+}
diff --git a/libm/sh/sh4/fsetexcptflg.c b/libm/sh/sh4/fsetexcptflg.c
new file mode 100644
index 000000000..8fcb94973
--- /dev/null
+++ b/libm/sh/sh4/fsetexcptflg.c
@@ -0,0 +1,38 @@
+/* Set floating-point environment exception handling.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <math.h>
+#include <fpu_control.h>
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+ fpu_control_t temp;
+
+ /* Get the current environment. */
+ _FPU_GETCW (temp);
+
+ /* Set the desired exception mask. */
+ temp &= ~(excepts & FE_ALL_EXCEPT);
+ temp |= (*flagp & excepts & FE_ALL_EXCEPT);
+
+ /* Save state back to the FPU. */
+ _FPU_SETCW (temp);
+
+ return 0;
+}
diff --git a/libm/sh/sh4/ftestexcept.c b/libm/sh/sh4/ftestexcept.c
new file mode 100644
index 000000000..edc523426
--- /dev/null
+++ b/libm/sh/sh4/ftestexcept.c
@@ -0,0 +1,30 @@
+/* Test exception in current environment.
+ Copyright (C) 1997-2025 Free Software Foundation, Inc.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fetestexcept (int excepts)
+{
+ fpu_control_t temp;
+
+ /* Get current exceptions. */
+ _FPU_GETCW (temp);
+
+ return temp & excepts & FE_ALL_EXCEPT;
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 18:32:50 +0000