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From GitBox <...@apache.org>
Subject [GitHub] [incubator-nuttx] patacongo commented on a change in pull request #789: Add RISC-V FPU support
Date Tue, 14 Apr 2020 19:18:29 GMT
patacongo commented on a change in pull request #789: Add RISC-V FPU support
URL: https://github.com/apache/incubator-nuttx/pull/789#discussion_r408376404
 
 

 ##########
 File path: arch/risc-v/src/rv32im/up_fpu.S
 ##########
 @@ -0,0 +1,251 @@
+/************************************************************************************
+ * arch/risc-v/src/rv32im/up_fpu.S
+ *
+ *   Copyright (C) 2018 Pinecone Inc. All rights reserved.
+ *   Author: Zhang Xiaoqin <zhangxiaoqin@pinecone.net>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <arch/rv32im/irq.h>
+
+#ifdef CONFIG_ARCH_FPU
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Symbols
+ ************************************************************************************/
+
+	.globl		up_fpuconfig
+	.globl		up_savefpu
+	.globl		up_restorefpu
+
+	.file		"up_fpu.S"
+
+#define FS_MASK		0x6000
+#define FS_OFF		0x0000
+#define FS_INITIAL	0x2000
+#define FS_CLEAN	0x4000
+#define FS_DIRTY	0x6000
+
+#if defined(CONFIG_ARCH_DPFPU)
+#  define FLOAD		fld
+#  define FSTORE	fsd
+#elif defined(CONFIG_ARCH_QPFPU)
+#  define FLOAD		flq
+#  define FSTORE	fsq
+#else
+#  define FLOAD		flw
+#  define FSTORE	fsw
+#endif
 
 Review comment:
   I have already merged this, but I just noted that these #defines are in the wrong place.
 They should be moved up inot the "Pre-processor Definitions" section

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