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authoralk3pInjection <webmaster@raspii.tech>2024-02-04 16:16:35 +0800
committeralk3pInjection <webmaster@raspii.tech>2024-02-04 16:16:35 +0800
commit6ce4ebed87858ecdd79a1091367c6e961055daa9 (patch)
tree1c2a6a60531acf791531bbd9c8ac14c23ef8a66c /aarch64-none-linux-gnu/libc/usr/include/fpu_control.h
Import stripped Arm GNU Toolchain 13.2.Rel1HEADumineko
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
Diffstat (limited to 'aarch64-none-linux-gnu/libc/usr/include/fpu_control.h')
-rw-r--r--aarch64-none-linux-gnu/libc/usr/include/fpu_control.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/aarch64-none-linux-gnu/libc/usr/include/fpu_control.h b/aarch64-none-linux-gnu/libc/usr/include/fpu_control.h
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+++ b/aarch64-none-linux-gnu/libc/usr/include/fpu_control.h
@@ -0,0 +1,90 @@
+/* Copyright (C) 1996-2023 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/>. */
+
+#ifndef _AARCH64_FPU_CONTROL_H
+#define _AARCH64_FPU_CONTROL_H
+
+#include <features.h>
+
+/* Macros for accessing the FPCR and FPSR. */
+
+#if __GNUC_PREREQ (6,0)
+# define _FPU_GETCW(fpcr) (fpcr = __builtin_aarch64_get_fpcr ())
+# define _FPU_SETCW(fpcr) __builtin_aarch64_set_fpcr (fpcr)
+# define _FPU_GETFPSR(fpsr) (fpsr = __builtin_aarch64_get_fpsr ())
+# define _FPU_SETFPSR(fpsr) __builtin_aarch64_set_fpsr (fpsr)
+#else
+# define _FPU_GETCW(fpcr) \
+ __asm__ __volatile__ ("mrs %0, fpcr" : "=r" (fpcr))
+
+# define _FPU_SETCW(fpcr) \
+ __asm__ __volatile__ ("msr fpcr, %0" : : "r" (fpcr))
+
+# define _FPU_GETFPSR(fpsr) \
+ __asm__ __volatile__ ("mrs %0, fpsr" : "=r" (fpsr))
+
+# define _FPU_SETFPSR(fpsr) \
+ __asm__ __volatile__ ("msr fpsr, %0" : : "r" (fpsr))
+#endif
+
+/* Reserved bits should be preserved when modifying register
+ contents. These two masks indicate which bits in each of FPCR and
+ FPSR should not be changed. */
+
+#define _FPU_RESERVED 0xfe0fe0f8
+#define _FPU_FPSR_RESERVED 0x0fffffe0
+
+#define _FPU_DEFAULT 0x00000000
+#define _FPU_FPSR_DEFAULT 0x00000000
+
+/* Layout of FPCR and FPSR:
+
+ | | | | | | | |
+ 0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0
+ s s s s s s s s s s s
+ c c c c c c c c c c c c
+ N Z C V Q A D F R R S S S L L L I U U I U O D I I U U I U O D I
+ C H N Z M M T T B E E E D N N X F F Z O D N N X F F Z O
+ P O O R R Z N N N E K K E E E E E C K K C C C C C
+ D D I I P
+ E E D D
+ E E
+ */
+
+#define _FPU_FPCR_RM_MASK 0xc00000
+
+#define _FPU_FPCR_MASK_IXE 0x1000
+#define _FPU_FPCR_MASK_UFE 0x0800
+#define _FPU_FPCR_MASK_OFE 0x0400
+#define _FPU_FPCR_MASK_DZE 0x0200
+#define _FPU_FPCR_MASK_IOE 0x0100
+
+#define _FPU_FPCR_IEEE \
+ (_FPU_DEFAULT | _FPU_FPCR_MASK_IXE \
+ | _FPU_FPCR_MASK_UFE | _FPU_FPCR_MASK_OFE \
+ | _FPU_FPCR_MASK_DZE | _FPU_FPCR_MASK_IOE)
+
+#define _FPU_FPSR_IEEE 0
+
+typedef unsigned int fpu_control_t;
+typedef unsigned int fpu_fpsr_t;
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif