| /** |
| * @file |
| * @brief ARC GCC specific floating point register macros |
| */ |
| |
| /* |
| * Copyright (c) 2019, Synopsys. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #ifndef _FLOAT_REGS_ARC_GCC_H |
| #define _FLOAT_REGS_ARC_GCC_H |
| |
| #if !defined(__GNUC__) || !defined(CONFIG_ISA_ARCV2) |
| #error __FILE__ goes only with ARC GCC |
| #endif |
| |
| #include <zephyr/toolchain.h> |
| #include "float_context.h" |
| |
| /** |
| * |
| * @brief Load all floating point registers |
| * |
| * This function loads ALL floating point registers pointed to by @a regs. |
| * It is expected that a subsequent call to _store_all_float_registers() |
| * will be issued to dump the floating point registers to memory. |
| * |
| * The format/organization of 'struct fp_register_set'; the generic C test |
| * code (main.c) merely treat the register set as an array of bytes. |
| * |
| * The only requirement is that the arch specific implementations of |
| * _load_all_float_registers() and _store_all_float_registers() agree |
| * on the format. |
| * |
| */ |
| static inline void _load_all_float_registers(struct fp_register_set *regs) |
| { |
| #ifdef CONFIG_FP_FPU_DA |
| uint32_t temp = 0; |
| |
| __asm__ volatile ( |
| "ld.ab %1, [%0, 4];\n\t" |
| "sr %1, [%2];\n\t" |
| "ld.ab %1, [%0, 4];\n\t" |
| "sr %1, [%3];\n\t" |
| "ld.ab %1, [%0, 4];\n\t" |
| "sr %1, [%4];\n\t" |
| "ld.ab %1, [%0, 4];\n\t" |
| "sr %1, [%5];\n\t" |
| : : "r" (regs), "r" (temp), |
| "i"(_ARC_V2_FPU_DPFP1L), "i"(_ARC_V2_FPU_DPFP1H), |
| "i"(_ARC_V2_FPU_DPFP2L), "i"(_ARC_V2_FPU_DPFP2H) |
| : "memory" |
| ); |
| #endif |
| } |
| |
| /** |
| * |
| * @brief Dump all floating point registers to memory |
| * |
| * This function stores ALL floating point registers to the memory buffer |
| * specified by @a regs. It is expected that a previous invocation of |
| * _load_all_float_registers() occurred to load all the floating point |
| * registers from a memory buffer. |
| * |
| */ |
| |
| static inline void _store_all_float_registers(struct fp_register_set *regs) |
| { |
| #ifdef CONFIG_FP_FPU_DA |
| uint32_t temp = 0; |
| |
| __asm__ volatile ( |
| "lr %1, [%2];\n\t" |
| "st.ab %1, [%0, 4];\n\t" |
| "lr %1, [%3];\n\t" |
| "st.ab %1, [%0, 4];\n\t" |
| "lr %1, [%4];\n\t" |
| "st.ab %1, [%0, 4];\n\t" |
| "lr %1, [%5];\n\t" |
| "st.ab %1, [%0, 4];\n\t" |
| : : "r" (regs), "r" (temp), |
| "i"(_ARC_V2_FPU_DPFP1L), "i"(_ARC_V2_FPU_DPFP1H), |
| "i"(_ARC_V2_FPU_DPFP2L), "i"(_ARC_V2_FPU_DPFP2H) |
| ); |
| #endif |
| } |
| |
| /** |
| * |
| * @brief Load then dump all float registers to memory |
| * |
| * This function loads ALL floating point registers from the memory buffer |
| * specified by @a regs, and then stores them back to that buffer. |
| * |
| * This routine is called by a high priority thread prior to calling a primitive |
| * that pends and triggers a co-operative context switch to a low priority |
| * thread. |
| * |
| */ |
| |
| static inline void _load_then_store_all_float_registers(struct fp_register_set |
| *regs) |
| { |
| _load_all_float_registers(regs); |
| _store_all_float_registers(regs); |
| } |
| #endif /* _FLOAT_REGS_ARC_GCC_H */ |