rt-thread-official/libcpu/mips/loongson_1c/stackframe_fpu.h

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/*
* ls1c FPU's stackframe
* 最开始本想将代码加入到stackframe.h中的SAVE_ALL, RESTORE_ALL和RESTORE_ALL_AND_RET中
* 但考虑到源文件"stackframe.h"位于目录"libcpu\mips\common"内怕影响到其它mips cpu
* 所以,另外新建本源文件
*/
#ifndef __OPENLOONGSON_STACKFRAME_FPU_H
#define __OPENLOONGSON_STACKFRAME_FPU_H
#include "../common/asm.h"
#include "../common/mipsregs.h"
#include "../common/stackframe.h"
#define PT_FPU_R0 (0)
#define PT_FPU_R2 ((PT_FPU_R0) + 2*LONGSIZE)
#define PT_FPU_R4 ((PT_FPU_R2) + 2*LONGSIZE)
#define PT_FPU_R6 ((PT_FPU_R4) + 2*LONGSIZE)
#define PT_FPU_R8 ((PT_FPU_R6) + 2*LONGSIZE)
#define PT_FPU_R10 ((PT_FPU_R8) + 2*LONGSIZE)
#define PT_FPU_R12 ((PT_FPU_R10) + 2*LONGSIZE)
#define PT_FPU_R14 ((PT_FPU_R12) + 2*LONGSIZE)
#define PT_FPU_R16 ((PT_FPU_R14) + 2*LONGSIZE)
#define PT_FPU_R18 ((PT_FPU_R16) + 2*LONGSIZE)
#define PT_FPU_R20 ((PT_FPU_R18) + 2*LONGSIZE)
#define PT_FPU_R22 ((PT_FPU_R20) + 2*LONGSIZE)
#define PT_FPU_R24 ((PT_FPU_R22) + 2*LONGSIZE)
#define PT_FPU_R26 ((PT_FPU_R24) + 2*LONGSIZE)
#define PT_FPU_R28 ((PT_FPU_R26) + 2*LONGSIZE)
#define PT_FPU_R30 ((PT_FPU_R28) + 2*LONGSIZE)
#define PT_FPU_SIZE ((((PT_FPU_R30) + 2*LONGSIZE) + (2*PTRSIZE-1)) & ~(2*PTRSIZE-1))
.macro SAVE_FPU
.set push
.set noreorder
#ifdef RT_USING_FPU
move k1, sp /* 保存现场 */
and k0, k1, 0xFFFFFFF8 /* 8字节对齐 */
PTR_SUBU sp, k0, PT_FPU_SIZE /* 计算栈底 */
s.d $f0, PT_FPU_R0(sp)
s.d $f2, PT_FPU_R2(sp)
s.d $f4, PT_FPU_R4(sp)
s.d $f6, PT_FPU_R6(sp)
s.d $f8, PT_FPU_R8(sp)
s.d $f10, PT_FPU_R10(sp)
s.d $f12, PT_FPU_R12(sp)
s.d $f14, PT_FPU_R14(sp)
s.d $f16, PT_FPU_R16(sp)
s.d $f18, PT_FPU_R18(sp)
s.d $f20, PT_FPU_R20(sp)
s.d $f22, PT_FPU_R22(sp)
s.d $f24, PT_FPU_R24(sp)
s.d $f26, PT_FPU_R26(sp)
s.d $f28, PT_FPU_R28(sp)
s.d $f30, PT_FPU_R30(sp)
move sp, k1 /* 恢复现场 */
#endif
.set reorder
.set pop
.endm
.macro RESTORE_FPU
.set push
.set noreorder
#ifdef RT_USING_FPU
move k1, sp /* 保存现场 */
and k0, k1, 0xFFFFFFF8 /* 8字节对齐 */
PTR_SUBU sp, k0, PT_FPU_SIZE /* 计算栈底*/
l.d $f0, PT_FPU_R0(sp)
l.d $f2, PT_FPU_R2(sp)
l.d $f4, PT_FPU_R4(sp)
l.d $f6, PT_FPU_R6(sp)
l.d $f8, PT_FPU_R8(sp)
l.d $f10, PT_FPU_R10(sp)
l.d $f12, PT_FPU_R12(sp)
l.d $f14, PT_FPU_R14(sp)
l.d $f16, PT_FPU_R16(sp)
l.d $f18, PT_FPU_R18(sp)
l.d $f20, PT_FPU_R20(sp)
l.d $f22, PT_FPU_R22(sp)
l.d $f24, PT_FPU_R24(sp)
l.d $f26, PT_FPU_R26(sp)
l.d $f28, PT_FPU_R28(sp)
l.d $f30, PT_FPU_R30(sp)
move sp, k1 /* 恢复现场 */
#endif
.set reorder
.set pop
.endm
#endif