| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Author: Lu Zeng <zenglu@loongson.cn> |
| * Pei Huang <huangpei@loongson.cn> |
| * Huacai Chen <chenhuacai@loongson.cn> |
| * |
| * Copyright (C) 2020-2022 Loongson Technology Corporation Limited |
| */ |
| #include <asm/asm.h> |
| #include <asm/asmmacro.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/errno.h> |
| #include <asm/export.h> |
| #include <asm/fpregdef.h> |
| #include <asm/loongarch.h> |
| #include <asm/regdef.h> |
| |
| #define FPU_REG_WIDTH 8 |
| #define LSX_REG_WIDTH 16 |
| #define LASX_REG_WIDTH 32 |
| |
| .macro EX insn, reg, src, offs |
| .ex\@: \insn \reg, \src, \offs |
| .section __ex_table,"a" |
| PTR .ex\@, fault |
| .previous |
| .endm |
| |
| .macro sc_save_fp base |
| EX fst.d $f0, \base, (0 * FPU_REG_WIDTH) |
| EX fst.d $f1, \base, (1 * FPU_REG_WIDTH) |
| EX fst.d $f2, \base, (2 * FPU_REG_WIDTH) |
| EX fst.d $f3, \base, (3 * FPU_REG_WIDTH) |
| EX fst.d $f4, \base, (4 * FPU_REG_WIDTH) |
| EX fst.d $f5, \base, (5 * FPU_REG_WIDTH) |
| EX fst.d $f6, \base, (6 * FPU_REG_WIDTH) |
| EX fst.d $f7, \base, (7 * FPU_REG_WIDTH) |
| EX fst.d $f8, \base, (8 * FPU_REG_WIDTH) |
| EX fst.d $f9, \base, (9 * FPU_REG_WIDTH) |
| EX fst.d $f10, \base, (10 * FPU_REG_WIDTH) |
| EX fst.d $f11, \base, (11 * FPU_REG_WIDTH) |
| EX fst.d $f12, \base, (12 * FPU_REG_WIDTH) |
| EX fst.d $f13, \base, (13 * FPU_REG_WIDTH) |
| EX fst.d $f14, \base, (14 * FPU_REG_WIDTH) |
| EX fst.d $f15, \base, (15 * FPU_REG_WIDTH) |
| EX fst.d $f16, \base, (16 * FPU_REG_WIDTH) |
| EX fst.d $f17, \base, (17 * FPU_REG_WIDTH) |
| EX fst.d $f18, \base, (18 * FPU_REG_WIDTH) |
| EX fst.d $f19, \base, (19 * FPU_REG_WIDTH) |
| EX fst.d $f20, \base, (20 * FPU_REG_WIDTH) |
| EX fst.d $f21, \base, (21 * FPU_REG_WIDTH) |
| EX fst.d $f22, \base, (22 * FPU_REG_WIDTH) |
| EX fst.d $f23, \base, (23 * FPU_REG_WIDTH) |
| EX fst.d $f24, \base, (24 * FPU_REG_WIDTH) |
| EX fst.d $f25, \base, (25 * FPU_REG_WIDTH) |
| EX fst.d $f26, \base, (26 * FPU_REG_WIDTH) |
| EX fst.d $f27, \base, (27 * FPU_REG_WIDTH) |
| EX fst.d $f28, \base, (28 * FPU_REG_WIDTH) |
| EX fst.d $f29, \base, (29 * FPU_REG_WIDTH) |
| EX fst.d $f30, \base, (30 * FPU_REG_WIDTH) |
| EX fst.d $f31, \base, (31 * FPU_REG_WIDTH) |
| .endm |
| |
| .macro sc_restore_fp base |
| EX fld.d $f0, \base, (0 * FPU_REG_WIDTH) |
| EX fld.d $f1, \base, (1 * FPU_REG_WIDTH) |
| EX fld.d $f2, \base, (2 * FPU_REG_WIDTH) |
| EX fld.d $f3, \base, (3 * FPU_REG_WIDTH) |
| EX fld.d $f4, \base, (4 * FPU_REG_WIDTH) |
| EX fld.d $f5, \base, (5 * FPU_REG_WIDTH) |
| EX fld.d $f6, \base, (6 * FPU_REG_WIDTH) |
| EX fld.d $f7, \base, (7 * FPU_REG_WIDTH) |
| EX fld.d $f8, \base, (8 * FPU_REG_WIDTH) |
| EX fld.d $f9, \base, (9 * FPU_REG_WIDTH) |
| EX fld.d $f10, \base, (10 * FPU_REG_WIDTH) |
| EX fld.d $f11, \base, (11 * FPU_REG_WIDTH) |
| EX fld.d $f12, \base, (12 * FPU_REG_WIDTH) |
| EX fld.d $f13, \base, (13 * FPU_REG_WIDTH) |
| EX fld.d $f14, \base, (14 * FPU_REG_WIDTH) |
| EX fld.d $f15, \base, (15 * FPU_REG_WIDTH) |
| EX fld.d $f16, \base, (16 * FPU_REG_WIDTH) |
| EX fld.d $f17, \base, (17 * FPU_REG_WIDTH) |
| EX fld.d $f18, \base, (18 * FPU_REG_WIDTH) |
| EX fld.d $f19, \base, (19 * FPU_REG_WIDTH) |
| EX fld.d $f20, \base, (20 * FPU_REG_WIDTH) |
| EX fld.d $f21, \base, (21 * FPU_REG_WIDTH) |
| EX fld.d $f22, \base, (22 * FPU_REG_WIDTH) |
| EX fld.d $f23, \base, (23 * FPU_REG_WIDTH) |
| EX fld.d $f24, \base, (24 * FPU_REG_WIDTH) |
| EX fld.d $f25, \base, (25 * FPU_REG_WIDTH) |
| EX fld.d $f26, \base, (26 * FPU_REG_WIDTH) |
| EX fld.d $f27, \base, (27 * FPU_REG_WIDTH) |
| EX fld.d $f28, \base, (28 * FPU_REG_WIDTH) |
| EX fld.d $f29, \base, (29 * FPU_REG_WIDTH) |
| EX fld.d $f30, \base, (30 * FPU_REG_WIDTH) |
| EX fld.d $f31, \base, (31 * FPU_REG_WIDTH) |
| .endm |
| |
| .macro sc_save_fcc base, tmp0, tmp1 |
| movcf2gr \tmp0, $fcc0 |
| move \tmp1, \tmp0 |
| movcf2gr \tmp0, $fcc1 |
| bstrins.d \tmp1, \tmp0, 15, 8 |
| movcf2gr \tmp0, $fcc2 |
| bstrins.d \tmp1, \tmp0, 23, 16 |
| movcf2gr \tmp0, $fcc3 |
| bstrins.d \tmp1, \tmp0, 31, 24 |
| movcf2gr \tmp0, $fcc4 |
| bstrins.d \tmp1, \tmp0, 39, 32 |
| movcf2gr \tmp0, $fcc5 |
| bstrins.d \tmp1, \tmp0, 47, 40 |
| movcf2gr \tmp0, $fcc6 |
| bstrins.d \tmp1, \tmp0, 55, 48 |
| movcf2gr \tmp0, $fcc7 |
| bstrins.d \tmp1, \tmp0, 63, 56 |
| EX st.d \tmp1, \base, 0 |
| .endm |
| |
| .macro sc_restore_fcc base, tmp0, tmp1 |
| EX ld.d \tmp0, \base, 0 |
| bstrpick.d \tmp1, \tmp0, 7, 0 |
| movgr2cf $fcc0, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 15, 8 |
| movgr2cf $fcc1, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 23, 16 |
| movgr2cf $fcc2, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 31, 24 |
| movgr2cf $fcc3, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 39, 32 |
| movgr2cf $fcc4, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 47, 40 |
| movgr2cf $fcc5, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 55, 48 |
| movgr2cf $fcc6, \tmp1 |
| bstrpick.d \tmp1, \tmp0, 63, 56 |
| movgr2cf $fcc7, \tmp1 |
| .endm |
| |
| .macro sc_save_fcsr base, tmp0 |
| movfcsr2gr \tmp0, fcsr0 |
| EX st.w \tmp0, \base, 0 |
| .endm |
| |
| .macro sc_restore_fcsr base, tmp0 |
| EX ld.w \tmp0, \base, 0 |
| movgr2fcsr fcsr0, \tmp0 |
| .endm |
| |
| /* |
| * Save a thread's fp context. |
| */ |
| SYM_FUNC_START(_save_fp) |
| fpu_save_csr a0 t1 |
| fpu_save_double a0 t1 # clobbers t1 |
| fpu_save_cc a0 t1 t2 # clobbers t1, t2 |
| jr ra |
| SYM_FUNC_END(_save_fp) |
| EXPORT_SYMBOL(_save_fp) |
| |
| /* |
| * Restore a thread's fp context. |
| */ |
| SYM_FUNC_START(_restore_fp) |
| fpu_restore_double a0 t1 # clobbers t1 |
| fpu_restore_csr a0 t1 |
| fpu_restore_cc a0 t1 t2 # clobbers t1, t2 |
| jr ra |
| SYM_FUNC_END(_restore_fp) |
| |
| /* |
| * Load the FPU with signalling NANS. This bit pattern we're using has |
| * the property that no matter whether considered as single or as double |
| * precision represents signaling NANS. |
| * |
| * The value to initialize fcsr0 to comes in $a0. |
| */ |
| |
| SYM_FUNC_START(_init_fpu) |
| li.w t1, CSR_EUEN_FPEN |
| csrxchg t1, t1, LOONGARCH_CSR_EUEN |
| |
| movgr2fcsr fcsr0, a0 |
| |
| li.w t1, -1 # SNaN |
| |
| movgr2fr.d $f0, t1 |
| movgr2fr.d $f1, t1 |
| movgr2fr.d $f2, t1 |
| movgr2fr.d $f3, t1 |
| movgr2fr.d $f4, t1 |
| movgr2fr.d $f5, t1 |
| movgr2fr.d $f6, t1 |
| movgr2fr.d $f7, t1 |
| movgr2fr.d $f8, t1 |
| movgr2fr.d $f9, t1 |
| movgr2fr.d $f10, t1 |
| movgr2fr.d $f11, t1 |
| movgr2fr.d $f12, t1 |
| movgr2fr.d $f13, t1 |
| movgr2fr.d $f14, t1 |
| movgr2fr.d $f15, t1 |
| movgr2fr.d $f16, t1 |
| movgr2fr.d $f17, t1 |
| movgr2fr.d $f18, t1 |
| movgr2fr.d $f19, t1 |
| movgr2fr.d $f20, t1 |
| movgr2fr.d $f21, t1 |
| movgr2fr.d $f22, t1 |
| movgr2fr.d $f23, t1 |
| movgr2fr.d $f24, t1 |
| movgr2fr.d $f25, t1 |
| movgr2fr.d $f26, t1 |
| movgr2fr.d $f27, t1 |
| movgr2fr.d $f28, t1 |
| movgr2fr.d $f29, t1 |
| movgr2fr.d $f30, t1 |
| movgr2fr.d $f31, t1 |
| |
| jr ra |
| SYM_FUNC_END(_init_fpu) |
| |
| /* |
| * a0: fpregs |
| * a1: fcc |
| * a2: fcsr |
| */ |
| SYM_FUNC_START(_save_fp_context) |
| sc_save_fcc a1 t1 t2 |
| sc_save_fcsr a2 t1 |
| sc_save_fp a0 |
| li.w a0, 0 # success |
| jr ra |
| SYM_FUNC_END(_save_fp_context) |
| |
| /* |
| * a0: fpregs |
| * a1: fcc |
| * a2: fcsr |
| */ |
| SYM_FUNC_START(_restore_fp_context) |
| sc_restore_fp a0 |
| sc_restore_fcc a1 t1 t2 |
| sc_restore_fcsr a2 t1 |
| li.w a0, 0 # success |
| jr ra |
| SYM_FUNC_END(_restore_fp_context) |
| |
| SYM_FUNC_START(fault) |
| li.w a0, -EFAULT # failure |
| jr ra |
| SYM_FUNC_END(fault) |
