nds32: Remove the architecture

The nds32 architecture, also known as AndeStar V3, is a custom 32-bit
RISC target designed by Andes Technologies. Support was added to the
kernel in 2016 as the replacement RISC-V based V5 processors were
already announced, and maintained by (current or former) Andes
employees.

As explained by Alan Kao, new customers are now all using RISC-V,
and all known nds32 users are already on longterm stable kernels
provided by Andes, with no development work going into mainline
support any more.

While the port is still in a reasonably good shape, it only gets
worse over time without active maintainers, so it seems best
to remove it before it becomes unusable. As always, if it turns
out that there are mainline users after all, and they volunteer
to maintain the port in the future, the removal can be reverted.

Link: https://lore.kernel.org/linux-mm/YhdWNLUhk+x9RAzU@yamatobi.andestech.com/
Link: https://lore.kernel.org/lkml/20220302065213.82702-1-alankao@andestech.com/
Link: https://www.andestech.com/en/products-solutions/andestar-architecture/
Signed-off-by: Alan Kao <alankao@andestech.com>
[arnd: rewrite changelog to provide more background]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

30 files changed, 0 insertions, 1119 deletions

diff --git a/arch/nds32/math-emu/Makefile b/arch/nds32/math-emu/Makefile
deleted file mode 100644
index 3bed7e5d5d05..000000000000
--- a/arch/nds32/math-emu/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the Linux/nds32 kernel FPU emulation.
-#
-
-obj-y	:= fpuemu.o \
-	   fdivd.o fmuld.o fsubd.o faddd.o fs2d.o fsqrtd.o fcmpd.o fnegs.o \
-	   fd2si.o fd2ui.o fd2siz.o fd2uiz.o fsi2d.o fui2d.o \
-	   fdivs.o fmuls.o fsubs.o fadds.o fd2s.o fsqrts.o fcmps.o fnegd.o \
-	   fs2si.o fs2ui.o fs2siz.o fs2uiz.o fsi2s.o fui2s.o
diff --git a/arch/nds32/math-emu/faddd.c b/arch/nds32/math-emu/faddd.c
deleted file mode 100644
index f7fd4e3c3904..000000000000
--- a/arch/nds32/math-emu/faddd.c
+++ /dev/null
@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-void faddd(void *ft, void *fa, void *fb)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(B);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-	FP_UNPACK_DP(B, fb);
-
-	FP_ADD_D(R, A, B);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}
diff --git a/arch/nds32/math-emu/fadds.c b/arch/nds32/math-emu/fadds.c
deleted file mode 100644
index f5af6ca8cca5..000000000000
--- a/arch/nds32/math-emu/fadds.c
+++ /dev/null
@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fadds(void *ft, void *fa, void *fb)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(B);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-	FP_UNPACK_SP(B, fb);
-
-	FP_ADD_S(R, A, B);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}
diff --git a/arch/nds32/math-emu/fcmpd.c b/arch/nds32/math-emu/fcmpd.c
deleted file mode 100644
index 0ea225abe880..000000000000
--- a/arch/nds32/math-emu/fcmpd.c
+++ /dev/null
@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-int fcmpd(void *ft, void *fa, void *fb, int cmpop)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(B);
-	FP_DECL_EX;
-	long cmp;
-
-	FP_UNPACK_DP(A, fa);
-	FP_UNPACK_DP(B, fb);
-
-	FP_CMP_D(cmp, A, B, SF_CUN);
-	cmp += 2;
-	if (cmp == SF_CGT)
-		*(long *)ft = 0;
-	else
-		*(long *)ft = (cmp & cmpop) ? 1 : 0;
-
-	return 0;
-}
diff --git a/arch/nds32/math-emu/fcmps.c b/arch/nds32/math-emu/fcmps.c
deleted file mode 100644
index 681480758213..000000000000
--- a/arch/nds32/math-emu/fcmps.c
+++ /dev/null
@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-int fcmps(void *ft, void *fa, void *fb, int cmpop)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(B);
-	FP_DECL_EX;
-	long cmp;
-
-	FP_UNPACK_SP(A, fa);
-	FP_UNPACK_SP(B, fb);
-
-	FP_CMP_S(cmp, A, B, SF_CUN);
-	cmp += 2;
-	if (cmp == SF_CGT)
-		*(int *)ft = 0x0;
-	else
-		*(int *)ft = (cmp & cmpop) ? 0x1 : 0x0;
-
-	return 0;
-}
diff --git a/arch/nds32/math-emu/fd2s.c b/arch/nds32/math-emu/fd2s.c
deleted file mode 100644
index 1328371e8170..000000000000
--- a/arch/nds32/math-emu/fd2s.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/double.h>
-#include <math-emu/single.h>
-#include <math-emu/soft-fp.h>
-void fd2s(void *ft, void *fa)
-{
-	FP_DECL_D(A);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	FP_CONV(S, D, 1, 2, R, A);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fd2si.c b/arch/nds32/math-emu/fd2si.c
deleted file mode 100644
index fae3e16a0a10..000000000000
--- a/arch/nds32/math-emu/fd2si.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fd2si(void *ft, void *fa)
-{
-	int r;
-
-	FP_DECL_D(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_ROUND_D(r, A, 32, 1);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(int *)ft = r;
-	}
-
-}
diff --git a/arch/nds32/math-emu/fd2siz.c b/arch/nds32/math-emu/fd2siz.c
deleted file mode 100644
index 92fe6774f112..000000000000
--- a/arch/nds32/math-emu/fd2siz.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fd2si_z(void *ft, void *fa)
-{
-	int r;
-
-	FP_DECL_D(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_D(r, A, 32, 1);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(int *)ft = r;
-	}
-
-}
diff --git a/arch/nds32/math-emu/fd2ui.c b/arch/nds32/math-emu/fd2ui.c
deleted file mode 100644
index a0423b699aa4..000000000000
--- a/arch/nds32/math-emu/fd2ui.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fd2ui(void *ft, void *fa)
-{
-	unsigned int r;
-
-	FP_DECL_D(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(unsigned int *)ft = (A_s == 0) ? 0xffffffff : 0x00000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(unsigned int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_ROUND_D(r, A, 32, 0);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(unsigned int *)ft = r;
-	}
-
-}
diff --git a/arch/nds32/math-emu/fd2uiz.c b/arch/nds32/math-emu/fd2uiz.c
deleted file mode 100644
index 8ae17cfce90d..000000000000
--- a/arch/nds32/math-emu/fd2uiz.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fd2ui_z(void *ft, void *fa)
-{
-	unsigned int r;
-
-	FP_DECL_D(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(unsigned int *)ft = (A_s == 0) ? 0xffffffff : 0x00000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(unsigned int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_D(r, A, 32, 0);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(unsigned int *)ft = r;
-	}
-
-}
diff --git a/arch/nds32/math-emu/fdivd.c b/arch/nds32/math-emu/fdivd.c
deleted file mode 100644
index 458e7e98b08e..000000000000
--- a/arch/nds32/math-emu/fdivd.c
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/uaccess.h>
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fdivd(void *ft, void *fa, void *fb)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(B);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-	FP_UNPACK_DP(B, fb);
-
-	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO)
-		FP_SET_EXCEPTION(FP_EX_DIVZERO);
-
-	FP_DIV_D(R, A, B);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fdivs.c b/arch/nds32/math-emu/fdivs.c
deleted file mode 100644
index c7d202159ce2..000000000000
--- a/arch/nds32/math-emu/fdivs.c
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fdivs(void *ft, void *fa, void *fb)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(B);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-	FP_UNPACK_SP(B, fb);
-
-	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO)
-		FP_SET_EXCEPTION(FP_EX_DIVZERO);
-
-	FP_DIV_S(R, A, B);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fmuld.c b/arch/nds32/math-emu/fmuld.c
deleted file mode 100644
index f3c77a45ddc2..000000000000
--- a/arch/nds32/math-emu/fmuld.c
+++ /dev/null
@@ -1,23 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-void fmuld(void *ft, void *fa, void *fb)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(B);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-	FP_UNPACK_DP(B, fb);
-
-	FP_MUL_D(R, A, B);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fmuls.c b/arch/nds32/math-emu/fmuls.c
deleted file mode 100644
index cf150df938f9..000000000000
--- a/arch/nds32/math-emu/fmuls.c
+++ /dev/null
@@ -1,23 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fmuls(void *ft, void *fa, void *fb)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(B);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-	FP_UNPACK_SP(B, fb);
-
-	FP_MUL_S(R, A, B);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fnegd.c b/arch/nds32/math-emu/fnegd.c
deleted file mode 100644
index de7ea6a0873e..000000000000
--- a/arch/nds32/math-emu/fnegd.c
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-void fnegd(void *ft, void *fa)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	FP_NEG_D(R, A);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fnegs.c b/arch/nds32/math-emu/fnegs.c
deleted file mode 100644
index 07270b326a77..000000000000
--- a/arch/nds32/math-emu/fnegs.c
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fnegs(void *ft, void *fa)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	FP_NEG_S(R, A);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fpuemu.c b/arch/nds32/math-emu/fpuemu.c
deleted file mode 100644
index 46558a15c0dc..000000000000
--- a/arch/nds32/math-emu/fpuemu.c
+++ /dev/null
@@ -1,406 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <asm/bitfield.h>
-#include <asm/uaccess.h>
-#include <asm/sfp-machine.h>
-#include <asm/fpuemu.h>
-#include <asm/nds32_fpu_inst.h>
-
-#define DPFROMREG(dp, x) (dp = (void *)((unsigned long *)fpu_reg + 2*x))
-#ifdef __NDS32_EL__
-#define SPFROMREG(sp, x)\
-	((sp) = (void *)((unsigned long *)fpu_reg + (x^1)))
-#else
-#define SPFROMREG(sp, x) ((sp) = (void *)((unsigned long *)fpu_reg + x))
-#endif
-
-#define DEF3OP(name, p, f1, f2) \
-void fpemu_##name##p(void *ft, void *fa, void *fb) \
-{ \
-	f1(fa, fa, fb); \
-	f2(ft, ft, fa); \
-}
-
-#define DEF3OPNEG(name, p, f1, f2, f3) \
-void fpemu_##name##p(void *ft, void *fa, void *fb) \
-{ \
-	f1(fa, fa, fb); \
-	f2(ft, ft, fa); \
-	f3(ft, ft); \
-}
-DEF3OP(fmadd, s, fmuls, fadds);
-DEF3OP(fmsub, s, fmuls, fsubs);
-DEF3OP(fmadd, d, fmuld, faddd);
-DEF3OP(fmsub, d, fmuld, fsubd);
-DEF3OPNEG(fnmadd, s, fmuls, fadds, fnegs);
-DEF3OPNEG(fnmsub, s, fmuls, fsubs, fnegs);
-DEF3OPNEG(fnmadd, d, fmuld, faddd, fnegd);
-DEF3OPNEG(fnmsub, d, fmuld, fsubd, fnegd);
-
-static const unsigned char cmptab[8] = {
-	SF_CEQ,
-	SF_CEQ,
-	SF_CLT,
-	SF_CLT,
-	SF_CLT | SF_CEQ,
-	SF_CLT | SF_CEQ,
-	SF_CUN,
-	SF_CUN
-};
-
-enum ARGTYPE {
-	S1S = 1,
-	S2S,
-	S1D,
-	CS,
-	D1D,
-	D2D,
-	D1S,
-	CD
-};
-union func_t {
-	void (*t)(void *ft, void *fa, void *fb);
-	void (*b)(void *ft, void *fa);
-};
-/*
- * Emulate a single FPU arithmetic instruction.
- */
-static int fpu_emu(struct fpu_struct *fpu_reg, unsigned long insn)
-{
-	int rfmt;		/* resulting format */
-	union func_t func;
-	int ftype = 0;
-
-	switch (rfmt = NDS32Insn_OPCODE_COP0(insn)) {
-	case fs1_op:{
-			switch (NDS32Insn_OPCODE_BIT69(insn)) {
-			case fadds_op:
-				func.t = fadds;
-				ftype = S2S;
-				break;
-			case fsubs_op:
-				func.t = fsubs;
-				ftype = S2S;
-				break;
-			case fmadds_op:
-				func.t = fpemu_fmadds;
-				ftype = S2S;
-				break;
-			case fmsubs_op:
-				func.t = fpemu_fmsubs;
-				ftype = S2S;
-				break;
-			case fnmadds_op:
-				func.t = fpemu_fnmadds;
-				ftype = S2S;
-				break;
-			case fnmsubs_op:
-				func.t = fpemu_fnmsubs;
-				ftype = S2S;
-				break;
-			case fmuls_op:
-				func.t = fmuls;
-				ftype = S2S;
-				break;
-			case fdivs_op:
-				func.t = fdivs;
-				ftype = S2S;
-				break;
-			case fs1_f2op_op:
-				switch (NDS32Insn_OPCODE_BIT1014(insn)) {
-				case fs2d_op:
-					func.b = fs2d;
-					ftype = S1D;
-					break;
-				case fs2si_op:
-					func.b = fs2si;
-					ftype = S1S;
-					break;
-				case fs2si_z_op:
-					func.b = fs2si_z;
-					ftype = S1S;
-					break;
-				case fs2ui_op:
-					func.b = fs2ui;
-					ftype = S1S;
-					break;
-				case fs2ui_z_op:
-					func.b = fs2ui_z;
-					ftype = S1S;
-					break;
-				case fsi2s_op:
-					func.b = fsi2s;
-					ftype = S1S;
-					break;
-				case fui2s_op:
-					func.b = fui2s;
-					ftype = S1S;
-					break;
-				case fsqrts_op:
-					func.b = fsqrts;
-					ftype = S1S;
-					break;
-				default:
-					return SIGILL;
-				}
-				break;
-			default:
-				return SIGILL;
-			}
-			break;
-		}
-	case fs2_op:
-		switch (NDS32Insn_OPCODE_BIT69(insn)) {
-		case fcmpeqs_op:
-		case fcmpeqs_e_op:
-		case fcmplts_op:
-		case fcmplts_e_op:
-		case fcmples_op:
-		case fcmples_e_op:
-		case fcmpuns_op:
-		case fcmpuns_e_op:
-			ftype = CS;
-			break;
-		default:
-			return SIGILL;
-		}
-		break;
-	case fd1_op:{
-			switch (NDS32Insn_OPCODE_BIT69(insn)) {
-			case faddd_op:
-				func.t = faddd;
-				ftype = D2D;
-				break;
-			case fsubd_op:
-				func.t = fsubd;
-				ftype = D2D;
-				break;
-			case fmaddd_op:
-				func.t = fpemu_fmaddd;
-				ftype = D2D;
-				break;
-			case fmsubd_op:
-				func.t = fpemu_fmsubd;
-				ftype = D2D;
-				break;
-			case fnmaddd_op:
-				func.t = fpemu_fnmaddd;
-				ftype = D2D;
-				break;
-			case fnmsubd_op:
-				func.t = fpemu_fnmsubd;
-				ftype = D2D;
-				break;
-			case fmuld_op:
-				func.t = fmuld;
-				ftype = D2D;
-				break;
-			case fdivd_op:
-				func.t = fdivd;
-				ftype = D2D;
-				break;
-			case fd1_f2op_op:
-				switch (NDS32Insn_OPCODE_BIT1014(insn)) {
-				case fd2s_op:
-					func.b = fd2s;
-					ftype = D1S;
-					break;
-				case fd2si_op:
-					func.b = fd2si;
-					ftype = D1S;
-					break;
-				case fd2si_z_op:
-					func.b = fd2si_z;
-					ftype = D1S;
-					break;
-				case fd2ui_op:
-					func.b = fd2ui;
-					ftype = D1S;
-					break;
-				case fd2ui_z_op:
-					func.b = fd2ui_z;
-					ftype = D1S;
-					break;
-				case fsi2d_op:
-					func.b = fsi2d;
-					ftype = D1S;
-					break;
-				case fui2d_op:
-					func.b = fui2d;
-					ftype = D1S;
-					break;
-				case fsqrtd_op:
-					func.b = fsqrtd;
-					ftype = D1D;
-					break;
-				default:
-					return SIGILL;
-				}
-				break;
-			default:
-				return SIGILL;
-
-			}
-			break;
-		}
-
-	case fd2_op:
-		switch (NDS32Insn_OPCODE_BIT69(insn)) {
-		case fcmpeqd_op:
-		case fcmpeqd_e_op:
-		case fcmpltd_op:
-		case fcmpltd_e_op:
-		case fcmpled_op:
-		case fcmpled_e_op:
-		case fcmpund_op:
-		case fcmpund_e_op:
-			ftype = CD;
-			break;
-		default:
-			return SIGILL;
-		}
-		break;
-
-	default:
-		return SIGILL;
-	}
-
-	switch (ftype) {
-	case S1S:{
-			void *ft, *fa;
-
-			SPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			SPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			func.b(ft, fa);
-			break;
-		}
-	case S2S:{
-			void *ft, *fa, *fb;
-
-			SPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			SPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			SPFROMREG(fb, NDS32Insn_OPCODE_Rb(insn));
-			func.t(ft, fa, fb);
-			break;
-		}
-	case S1D:{
-			void *ft, *fa;
-
-			DPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			SPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			func.b(ft, fa);
-			break;
-		}
-	case CS:{
-			unsigned int cmpop = NDS32Insn_OPCODE_BIT69(insn);
-			void *ft, *fa, *fb;
-
-			SPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			SPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			SPFROMREG(fb, NDS32Insn_OPCODE_Rb(insn));
-			if (cmpop < 0x8) {
-				cmpop = cmptab[cmpop];
-				fcmps(ft, fa, fb, cmpop);
-			} else
-				return SIGILL;
-			break;
-		}
-	case D1D:{
-			void *ft, *fa;
-
-			DPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			DPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			func.b(ft, fa);
-			break;
-		}
-	case D2D:{
-			void *ft, *fa, *fb;
-
-			DPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			DPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			DPFROMREG(fb, NDS32Insn_OPCODE_Rb(insn));
-			func.t(ft, fa, fb);
-			break;
-		}
-	case D1S:{
-			void *ft, *fa;
-
-			SPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			DPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			func.b(ft, fa);
-			break;
-		}
-	case CD:{
-			unsigned int cmpop = NDS32Insn_OPCODE_BIT69(insn);
-			void *ft, *fa, *fb;
-
-			SPFROMREG(ft, NDS32Insn_OPCODE_Rt(insn));
-			DPFROMREG(fa, NDS32Insn_OPCODE_Ra(insn));
-			DPFROMREG(fb, NDS32Insn_OPCODE_Rb(insn));
-			if (cmpop < 0x8) {
-				cmpop = cmptab[cmpop];
-				fcmpd(ft, fa, fb, cmpop);
-			} else
-				return SIGILL;
-			break;
-		}
-	default:
-		return SIGILL;
-	}
-
-	/*
-	 * If an exception is required, generate a tidy SIGFPE exception.
-	 */
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
-	if (((fpu_reg->fpcsr << 5) & fpu_reg->fpcsr & FPCSR_mskALLE_NO_UDF_IEXE)
-	    || ((fpu_reg->fpcsr << 5) & (fpu_reg->UDF_IEX_trap))) {
-#else
-	if ((fpu_reg->fpcsr << 5) & fpu_reg->fpcsr & FPCSR_mskALLE) {
-#endif
-		return SIGFPE;
-	}
-	return 0;
-}
-
-int do_fpuemu(struct pt_regs *regs, struct fpu_struct *fpu)
-{
-	unsigned long insn = 0, addr = regs->ipc;
-	unsigned long emulpc, contpc;
-	unsigned char *pc = (void *)&insn;
-	char c;
-	int i = 0, ret;
-
-	for (i = 0; i < 4; i++) {
-		if (__get_user(c, (unsigned char *)addr++))
-			return SIGBUS;
-		*pc++ = c;
-	}
-
-	insn = be32_to_cpu(insn);
-
-	emulpc = regs->ipc;
-	contpc = regs->ipc + 4;
-
-	if (NDS32Insn_OPCODE(insn) != cop0_op)
-		return SIGILL;
-
-	switch (NDS32Insn_OPCODE_COP0(insn)) {
-	case fs1_op:
-	case fs2_op:
-	case fd1_op:
-	case fd2_op:
-		{
-			/* a real fpu computation instruction */
-			ret = fpu_emu(fpu, insn);
-			if (!ret)
-				regs->ipc = contpc;
-		}
-		break;
-
-	default:
-		return SIGILL;
-	}
-
-	return ret;
-}
diff --git a/arch/nds32/math-emu/fs2d.c b/arch/nds32/math-emu/fs2d.c
deleted file mode 100644
index 0e8db9035631..000000000000
--- a/arch/nds32/math-emu/fs2d.c
+++ /dev/null
@@ -1,23 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/uaccess.h>
-#include <asm/sfp-machine.h>
-#include <math-emu/double.h>
-#include <math-emu/single.h>
-#include <math-emu/soft-fp.h>
-
-void fs2d(void *ft, void *fa)
-{
-	FP_DECL_S(A);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	FP_CONV(D, S, 2, 1, R, A);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fs2si.c b/arch/nds32/math-emu/fs2si.c
deleted file mode 100644
index b4931d60980e..000000000000
--- a/arch/nds32/math-emu/fs2si.c
+++ /dev/null
@@ -1,29 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fs2si(void *ft, void *fa)
-{
-	int r;
-
-	FP_DECL_S(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_ROUND_S(r, A, 32, 1);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(int *)ft = r;
-	}
-}
diff --git a/arch/nds32/math-emu/fs2siz.c b/arch/nds32/math-emu/fs2siz.c
deleted file mode 100644
index 1c2b99ce3e38..000000000000
--- a/arch/nds32/math-emu/fs2siz.c
+++ /dev/null
@@ -1,29 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fs2si_z(void *ft, void *fa)
-{
-	int r;
-
-	FP_DECL_S(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_S(r, A, 32, 1);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(int *)ft = r;
-	}
-}
diff --git a/arch/nds32/math-emu/fs2ui.c b/arch/nds32/math-emu/fs2ui.c
deleted file mode 100644
index c337f0384d06..000000000000
--- a/arch/nds32/math-emu/fs2ui.c
+++ /dev/null
@@ -1,29 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fs2ui(void *ft, void *fa)
-{
-	unsigned int r;
-
-	FP_DECL_S(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(unsigned int *)ft = (A_s == 0) ? 0xffffffff : 0x00000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(unsigned int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_ROUND_S(r, A, 32, 0);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(unsigned int *)ft = r;
-	}
-}
diff --git a/arch/nds32/math-emu/fs2uiz.c b/arch/nds32/math-emu/fs2uiz.c
deleted file mode 100644
index 22c5e4768044..000000000000
--- a/arch/nds32/math-emu/fs2uiz.c
+++ /dev/null
@@ -1,30 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fs2ui_z(void *ft, void *fa)
-{
-	unsigned int r;
-
-	FP_DECL_S(A);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	if (A_c == FP_CLS_INF) {
-		*(unsigned int *)ft = (A_s == 0) ? 0xffffffff : 0x00000000;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else if (A_c == FP_CLS_NAN) {
-		*(unsigned int *)ft = 0xffffffff;
-		__FPU_FPCSR |= FP_EX_INVALID;
-	} else {
-		FP_TO_INT_S(r, A, 32, 0);
-		__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-		*(unsigned int *)ft = r;
-	}
-
-}
diff --git a/arch/nds32/math-emu/fsi2d.c b/arch/nds32/math-emu/fsi2d.c
deleted file mode 100644
index 6b04cec0c5c5..000000000000
--- a/arch/nds32/math-emu/fsi2d.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fsi2d(void *ft, void *fa)
-{
-	int a = *(int *)fa;
-
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_FROM_INT_D(R, a, 32, int);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}
diff --git a/arch/nds32/math-emu/fsi2s.c b/arch/nds32/math-emu/fsi2s.c
deleted file mode 100644
index 689864a5df90..000000000000
--- a/arch/nds32/math-emu/fsi2s.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fsi2s(void *ft, void *fa)
-{
-	int a = *(int *)fa;
-
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_FROM_INT_S(R, a, 32, int);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}
diff --git a/arch/nds32/math-emu/fsqrtd.c b/arch/nds32/math-emu/fsqrtd.c
deleted file mode 100644
index c3a8dbd81d4e..000000000000
--- a/arch/nds32/math-emu/fsqrtd.c
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/uaccess.h>
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-void fsqrtd(void *ft, void *fa)
-{
-	FP_DECL_D(A);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-
-	FP_SQRT_D(R, A);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fsqrts.c b/arch/nds32/math-emu/fsqrts.c
deleted file mode 100644
index 4c6f94b27328..000000000000
--- a/arch/nds32/math-emu/fsqrts.c
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/uaccess.h>
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fsqrts(void *ft, void *fa)
-{
-	FP_DECL_S(A);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-
-	FP_SQRT_S(R, A);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fsubd.c b/arch/nds32/math-emu/fsubd.c
deleted file mode 100644
index 81b6a0d02a1f..000000000000
--- a/arch/nds32/math-emu/fsubd.c
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-void fsubd(void *ft, void *fa, void *fb)
-{
-
-	FP_DECL_D(A);
-	FP_DECL_D(B);
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_DP(A, fa);
-	FP_UNPACK_DP(B, fb);
-
-	if (B_c != FP_CLS_NAN)
-		B_s ^= 1;
-
-	FP_ADD_D(R, A, B);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fsubs.c b/arch/nds32/math-emu/fsubs.c
deleted file mode 100644
index 61ddd9708465..000000000000
--- a/arch/nds32/math-emu/fsubs.c
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-void fsubs(void *ft, void *fa, void *fb)
-{
-
-	FP_DECL_S(A);
-	FP_DECL_S(B);
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_UNPACK_SP(A, fa);
-	FP_UNPACK_SP(B, fb);
-
-	if (B_c != FP_CLS_NAN)
-		B_s ^= 1;
-
-	FP_ADD_S(R, A, B);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-}
diff --git a/arch/nds32/math-emu/fui2d.c b/arch/nds32/math-emu/fui2d.c
deleted file mode 100644
index 9689d33a8d50..000000000000
--- a/arch/nds32/math-emu/fui2d.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/double.h>
-
-void fui2d(void *ft, void *fa)
-{
-	unsigned int a = *(unsigned int *)fa;
-
-	FP_DECL_D(R);
-	FP_DECL_EX;
-
-	FP_FROM_INT_D(R, a, 32, int);
-
-	FP_PACK_DP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}
diff --git a/arch/nds32/math-emu/fui2s.c b/arch/nds32/math-emu/fui2s.c
deleted file mode 100644
index f70f0762547d..000000000000
--- a/arch/nds32/math-emu/fui2s.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2019 Andes Technology Corporation
-#include <linux/uaccess.h>
-
-#include <asm/sfp-machine.h>
-#include <math-emu/soft-fp.h>
-#include <math-emu/single.h>
-
-void fui2s(void *ft, void *fa)
-{
-	unsigned int a = *(unsigned int *)fa;
-
-	FP_DECL_S(R);
-	FP_DECL_EX;
-
-	FP_FROM_INT_S(R, a, 32, int);
-
-	FP_PACK_SP(ft, R);
-
-	__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
-
-}