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authorLinus Torvalds <torvalds@linux-foundation.org>2019-06-03 10:23:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-06-03 10:23:41 -0700
commit30d1d92a888d03681b927c76a35181b4eed7071f (patch)
tree8a1d452bd9c13d9edaa8f86ff9355f663ea9ec55
parent01e7a841b4346836f19b40677e1fef4657cc0d0d (diff)
parent932296120543149e3397af252e7daee7af37eb05 (diff)
download96b-common-30d1d92a888d03681b927c76a35181b4eed7071f.tar.gz
Merge tag 'nds32-for-linux-5.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux
Pull nds32 fixes from Greentime Hu: - fix warning for math-emu - fix nds32 fpu exception handling - fix nds32 fpu emulation implementation * tag 'nds32-for-linux-5.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux: nds32: add new emulations for floating point instruction nds32: Avoid IEX status being incorrectly modified math-emu: Use statement expressions to fix Wshift-count-overflow warning
-rw-r--r--arch/nds32/include/asm/bitfield.h2
-rw-r--r--arch/nds32/include/asm/fpu.h2
-rw-r--r--arch/nds32/include/asm/fpuemu.h12
-rw-r--r--arch/nds32/include/asm/syscalls.h2
-rw-r--r--arch/nds32/include/uapi/asm/fp_udfiex_crtl.h16
-rw-r--r--arch/nds32/include/uapi/asm/sigcontext.h24
-rw-r--r--arch/nds32/include/uapi/asm/udftrap.h13
-rw-r--r--arch/nds32/include/uapi/asm/unistd.h4
-rw-r--r--arch/nds32/kernel/fpu.c15
-rw-r--r--arch/nds32/kernel/sys_nds32.c26
-rw-r--r--arch/nds32/math-emu/Makefile4
-rw-r--r--arch/nds32/math-emu/fd2si.c30
-rw-r--r--arch/nds32/math-emu/fd2siz.c30
-rw-r--r--arch/nds32/math-emu/fd2ui.c30
-rw-r--r--arch/nds32/math-emu/fd2uiz.c30
-rw-r--r--arch/nds32/math-emu/fpuemu.c57
-rw-r--r--arch/nds32/math-emu/fs2si.c29
-rw-r--r--arch/nds32/math-emu/fs2siz.c29
-rw-r--r--arch/nds32/math-emu/fs2ui.c29
-rw-r--r--arch/nds32/math-emu/fs2uiz.c30
-rw-r--r--arch/nds32/math-emu/fsi2d.c22
-rw-r--r--arch/nds32/math-emu/fsi2s.c22
-rw-r--r--arch/nds32/math-emu/fui2d.c22
-rw-r--r--arch/nds32/math-emu/fui2s.c22
-rw-r--r--include/math-emu/op-2.h17
-rw-r--r--include/math-emu/op-common.h11
26 files changed, 464 insertions, 66 deletions
diff --git a/arch/nds32/include/asm/bitfield.h b/arch/nds32/include/asm/bitfield.h
index e75212c76b20..b02a58e71f80 100644
--- a/arch/nds32/include/asm/bitfield.h
+++ b/arch/nds32/include/asm/bitfield.h
@@ -937,7 +937,7 @@
#define FPCSR_mskDNIT ( 0x1 << FPCSR_offDNIT )
#define FPCSR_mskRIT ( 0x1 << FPCSR_offRIT )
#define FPCSR_mskALL (FPCSR_mskIVO | FPCSR_mskDBZ | FPCSR_mskOVF | FPCSR_mskUDF | FPCSR_mskIEX)
-#define FPCSR_mskALLE_NO_UDFE (FPCSR_mskIVOE | FPCSR_mskDBZE | FPCSR_mskOVFE | FPCSR_mskIEXE)
+#define FPCSR_mskALLE_NO_UDF_IEXE (FPCSR_mskIVOE | FPCSR_mskDBZE | FPCSR_mskOVFE)
#define FPCSR_mskALLE (FPCSR_mskIVOE | FPCSR_mskDBZE | FPCSR_mskOVFE | FPCSR_mskUDFE | FPCSR_mskIEXE)
#define FPCSR_mskALLT (FPCSR_mskIVOT | FPCSR_mskDBZT | FPCSR_mskOVFT | FPCSR_mskUDFT | FPCSR_mskIEXT |FPCSR_mskDNIT | FPCSR_mskRIT)
diff --git a/arch/nds32/include/asm/fpu.h b/arch/nds32/include/asm/fpu.h
index 019f1bcfc5ee..8294ed4aaa2c 100644
--- a/arch/nds32/include/asm/fpu.h
+++ b/arch/nds32/include/asm/fpu.h
@@ -36,7 +36,7 @@ extern int do_fpuemu(struct pt_regs *regs, struct fpu_struct *fpu);
* enabled by default and kerenl will re-execute it by fpu emulator
* when getting underflow exception.
*/
-#define FPCSR_INIT FPCSR_mskUDFE
+#define FPCSR_INIT (FPCSR_mskUDFE | FPCSR_mskIEXE)
#else
#define FPCSR_INIT 0x0UL
#endif
diff --git a/arch/nds32/include/asm/fpuemu.h b/arch/nds32/include/asm/fpuemu.h
index c4bd0c7faa75..63e7ef5f7969 100644
--- a/arch/nds32/include/asm/fpuemu.h
+++ b/arch/nds32/include/asm/fpuemu.h
@@ -13,6 +13,12 @@ void fsubs(void *ft, void *fa, void *fb);
void fmuls(void *ft, void *fa, void *fb);
void fdivs(void *ft, void *fa, void *fb);
void fs2d(void *ft, void *fa);
+void fs2si(void *ft, void *fa);
+void fs2si_z(void *ft, void *fa);
+void fs2ui(void *ft, void *fa);
+void fs2ui_z(void *ft, void *fa);
+void fsi2s(void *ft, void *fa);
+void fui2s(void *ft, void *fa);
void fsqrts(void *ft, void *fa);
void fnegs(void *ft, void *fa);
int fcmps(void *ft, void *fa, void *fb, int cop);
@@ -26,6 +32,12 @@ void fmuld(void *ft, void *fa, void *fb);
void fdivd(void *ft, void *fa, void *fb);
void fsqrtd(void *ft, void *fa);
void fd2s(void *ft, void *fa);
+void fd2si(void *ft, void *fa);
+void fd2si_z(void *ft, void *fa);
+void fd2ui(void *ft, void *fa);
+void fd2ui_z(void *ft, void *fa);
+void fsi2d(void *ft, void *fa);
+void fui2d(void *ft, void *fa);
void fnegd(void *ft, void *fa);
int fcmpd(void *ft, void *fa, void *fb, int cop);
diff --git a/arch/nds32/include/asm/syscalls.h b/arch/nds32/include/asm/syscalls.h
index f3b16f602cb5..4e7216082a67 100644
--- a/arch/nds32/include/asm/syscalls.h
+++ b/arch/nds32/include/asm/syscalls.h
@@ -7,7 +7,7 @@
asmlinkage long sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op);
asmlinkage long sys_fadvise64_64_wrapper(int fd, int advice, loff_t offset, loff_t len);
asmlinkage long sys_rt_sigreturn_wrapper(void);
-asmlinkage long sys_udftrap(int option);
+asmlinkage long sys_fp_udfiex_crtl(int cmd, int act);
#include <asm-generic/syscalls.h>
diff --git a/arch/nds32/include/uapi/asm/fp_udfiex_crtl.h b/arch/nds32/include/uapi/asm/fp_udfiex_crtl.h
new file mode 100644
index 000000000000..d54a5d6c6538
--- /dev/null
+++ b/arch/nds32/include/uapi/asm/fp_udfiex_crtl.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2005-2019 Andes Technology Corporation */
+#ifndef _FP_UDF_IEX_CRTL_H
+#define _FP_UDF_IEX_CRTL_H
+
+/*
+ * The cmd list of sys_fp_udfiex_crtl()
+ */
+/* Disable UDF or IEX trap based on the content of parameter act */
+#define DISABLE_UDF_IEX_TRAP 0
+/* Enable UDF or IEX trap based on the content of parameter act */
+#define ENABLE_UDF_IEX_TRAP 1
+/* Get current status of UDF and IEX trap */
+#define GET_UDF_IEX_TRAP 2
+
+#endif /* _FP_UDF_IEX_CRTL_H */
diff --git a/arch/nds32/include/uapi/asm/sigcontext.h b/arch/nds32/include/uapi/asm/sigcontext.h
index 628ff6b75825..dc89af7ddcc3 100644
--- a/arch/nds32/include/uapi/asm/sigcontext.h
+++ b/arch/nds32/include/uapi/asm/sigcontext.h
@@ -13,14 +13,24 @@ struct fpu_struct {
unsigned long long fd_regs[32];
unsigned long fpcsr;
/*
- * UDF_trap is used to recognize whether underflow trap is enabled
- * or not. When UDF_trap == 1, this process will be traped and then
- * get a SIGFPE signal when encountering an underflow exception.
- * UDF_trap is only modified through setfputrap syscall. Therefore,
- * UDF_trap needn't be saved or loaded to context in each context
- * switch.
+ * When CONFIG_SUPPORT_DENORMAL_ARITHMETIC is defined, kernel prevents
+ * hardware from treating the denormalized output as an underflow case
+ * and rounding it to a normal number. Hence kernel enables the UDF and
+ * IEX trap in the fpcsr register to step in the calculation.
+ * However, the UDF and IEX trap enable bit in $fpcsr also lose
+ * their use.
+ *
+ * UDF_IEX_trap replaces the feature of UDF and IEX trap enable bit in
+ * $fpcsr to control the trap of underflow and inexact. The bit filed
+ * of UDF_IEX_trap is the same as $fpcsr, 10th bit is used to enable UDF
+ * exception trapping and 11th bit is used to enable IEX exception
+ * trapping.
+ *
+ * UDF_IEX_trap is only modified through fp_udfiex_crtl syscall.
+ * Therefore, UDF_IEX_trap needn't be saved and restored in each
+ * context switch.
*/
- unsigned long UDF_trap;
+ unsigned long UDF_IEX_trap;
};
struct zol_struct {
diff --git a/arch/nds32/include/uapi/asm/udftrap.h b/arch/nds32/include/uapi/asm/udftrap.h
deleted file mode 100644
index 433f79d679c0..000000000000
--- a/arch/nds32/include/uapi/asm/udftrap.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2005-2018 Andes Technology Corporation */
-#ifndef _ASM_SETFPUTRAP
-#define _ASM_SETFPUTRAP
-
-/*
- * Options for setfputrap system call
- */
-#define DISABLE_UDFTRAP 0 /* disable underflow exception trap */
-#define ENABLE_UDFTRAP 1 /* enable undeflos exception trap */
-#define GET_UDFTRAP 2 /* only get undeflos exception trap status */
-
-#endif /* _ASM_CACHECTL */
diff --git a/arch/nds32/include/uapi/asm/unistd.h b/arch/nds32/include/uapi/asm/unistd.h
index c691735017ed..a0b2f7b9c0f2 100644
--- a/arch/nds32/include/uapi/asm/unistd.h
+++ b/arch/nds32/include/uapi/asm/unistd.h
@@ -11,6 +11,6 @@
/* Additional NDS32 specific syscalls. */
#define __NR_cacheflush (__NR_arch_specific_syscall)
-#define __NR_udftrap (__NR_arch_specific_syscall + 1)
+#define __NR_fp_udfiex_crtl (__NR_arch_specific_syscall + 1)
__SYSCALL(__NR_cacheflush, sys_cacheflush)
-__SYSCALL(__NR_udftrap, sys_udftrap)
+__SYSCALL(__NR_fp_udfiex_crtl, sys_fp_udfiex_crtl)
diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
index fddd40c7a16f..cf0b8760f261 100644
--- a/arch/nds32/kernel/fpu.c
+++ b/arch/nds32/kernel/fpu.c
@@ -14,7 +14,7 @@ const struct fpu_struct init_fpuregs = {
.fd_regs = {[0 ... 31] = sNAN64},
.fpcsr = FPCSR_INIT,
#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- .UDF_trap = 0
+ .UDF_IEX_trap = 0
#endif
};
@@ -178,7 +178,7 @@ inline void do_fpu_context_switch(struct pt_regs *regs)
/* First time FPU user. */
load_fpu(&init_fpuregs);
#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- current->thread.fpu.UDF_trap = init_fpuregs.UDF_trap;
+ current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
#endif
set_used_math();
}
@@ -206,7 +206,7 @@ inline void handle_fpu_exception(struct pt_regs *regs)
unsigned int fpcsr;
int si_code = 0, si_signo = SIGFPE;
#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- unsigned long redo_except = FPCSR_mskDNIT|FPCSR_mskUDFT;
+ unsigned long redo_except = FPCSR_mskDNIT|FPCSR_mskUDFT|FPCSR_mskIEXT;
#else
unsigned long redo_except = FPCSR_mskDNIT;
#endif
@@ -215,21 +215,18 @@ inline void handle_fpu_exception(struct pt_regs *regs)
fpcsr = current->thread.fpu.fpcsr;
if (fpcsr & redo_except) {
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- if (fpcsr & FPCSR_mskUDFT)
- current->thread.fpu.fpcsr &= ~FPCSR_mskIEX;
-#endif
si_signo = do_fpuemu(regs, &current->thread.fpu);
fpcsr = current->thread.fpu.fpcsr;
- if (!si_signo)
+ if (!si_signo) {
+ current->thread.fpu.fpcsr &= ~(redo_except);
goto done;
+ }
} else if (fpcsr & FPCSR_mskRIT) {
if (!user_mode(regs))
do_exit(SIGILL);
si_signo = SIGILL;
}
-
switch (si_signo) {
case SIGFPE:
fill_sigfpe_signo(fpcsr, &si_code);
diff --git a/arch/nds32/kernel/sys_nds32.c b/arch/nds32/kernel/sys_nds32.c
index 0835277636ce..cb2d1e219bb3 100644
--- a/arch/nds32/kernel/sys_nds32.c
+++ b/arch/nds32/kernel/sys_nds32.c
@@ -6,8 +6,8 @@
#include <asm/cachectl.h>
#include <asm/proc-fns.h>
-#include <asm/udftrap.h>
#include <asm/fpu.h>
+#include <asm/fp_udfiex_crtl.h>
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
@@ -51,31 +51,33 @@ SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache)
return 0;
}
-SYSCALL_DEFINE1(udftrap, int, option)
+SYSCALL_DEFINE2(fp_udfiex_crtl, unsigned int, cmd, unsigned int, act)
{
#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- int old_udftrap;
+ int old_udf_iex;
if (!used_math()) {
load_fpu(&init_fpuregs);
- current->thread.fpu.UDF_trap = init_fpuregs.UDF_trap;
+ current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
set_used_math();
}
- old_udftrap = current->thread.fpu.UDF_trap;
- switch (option) {
- case DISABLE_UDFTRAP:
- current->thread.fpu.UDF_trap = 0;
+ old_udf_iex = current->thread.fpu.UDF_IEX_trap;
+ act &= (FPCSR_mskUDFE | FPCSR_mskIEXE);
+
+ switch (cmd) {
+ case DISABLE_UDF_IEX_TRAP:
+ current->thread.fpu.UDF_IEX_trap &= ~act;
break;
- case ENABLE_UDFTRAP:
- current->thread.fpu.UDF_trap = FPCSR_mskUDFE;
+ case ENABLE_UDF_IEX_TRAP:
+ current->thread.fpu.UDF_IEX_trap |= act;
break;
- case GET_UDFTRAP:
+ case GET_UDF_IEX_TRAP:
break;
default:
return -EINVAL;
}
- return old_udftrap;
+ return old_udf_iex;
#else
return -ENOTSUPP;
#endif
diff --git a/arch/nds32/math-emu/Makefile b/arch/nds32/math-emu/Makefile
index 14fa01f4574a..3bed7e5d5d05 100644
--- a/arch/nds32/math-emu/Makefile
+++ b/arch/nds32/math-emu/Makefile
@@ -5,4 +5,6 @@
obj-y := fpuemu.o \
fdivd.o fmuld.o fsubd.o faddd.o fs2d.o fsqrtd.o fcmpd.o fnegs.o \
- fdivs.o fmuls.o fsubs.o fadds.o fd2s.o fsqrts.o fcmps.o fnegd.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/fd2si.c b/arch/nds32/math-emu/fd2si.c
new file mode 100644
index 000000000000..fae3e16a0a10
--- /dev/null
+++ b/arch/nds32/math-emu/fd2si.c
@@ -0,0 +1,30 @@
+// 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
new file mode 100644
index 000000000000..92fe6774f112
--- /dev/null
+++ b/arch/nds32/math-emu/fd2siz.c
@@ -0,0 +1,30 @@
+// 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
new file mode 100644
index 000000000000..a0423b699aa4
--- /dev/null
+++ b/arch/nds32/math-emu/fd2ui.c
@@ -0,0 +1,30 @@
+// 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
new file mode 100644
index 000000000000..8ae17cfce90d
--- /dev/null
+++ b/arch/nds32/math-emu/fd2uiz.c
@@ -0,0 +1,30 @@
+// 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/fpuemu.c b/arch/nds32/math-emu/fpuemu.c
index 75cf1643fa78..46558a15c0dc 100644
--- a/arch/nds32/math-emu/fpuemu.c
+++ b/arch/nds32/math-emu/fpuemu.c
@@ -113,6 +113,30 @@ static int fpu_emu(struct fpu_struct *fpu_reg, unsigned long insn)
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;
@@ -182,6 +206,30 @@ static int fpu_emu(struct fpu_struct *fpu_reg, unsigned long insn)
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;
@@ -305,16 +353,16 @@ static int fpu_emu(struct fpu_struct *fpu_reg, unsigned long insn)
* 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_UDFE) ||
- ((fpu_reg->fpcsr & FPCSR_mskUDF) && (fpu_reg->UDF_trap)))
+ 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)
+ 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;
@@ -336,6 +384,7 @@ int do_fpuemu(struct pt_regs *regs, struct fpu_struct *fpu)
if (NDS32Insn_OPCODE(insn) != cop0_op)
return SIGILL;
+
switch (NDS32Insn_OPCODE_COP0(insn)) {
case fs1_op:
case fs2_op:
diff --git a/arch/nds32/math-emu/fs2si.c b/arch/nds32/math-emu/fs2si.c
new file mode 100644
index 000000000000..b4931d60980e
--- /dev/null
+++ b/arch/nds32/math-emu/fs2si.c
@@ -0,0 +1,29 @@
+// 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
new file mode 100644
index 000000000000..1c2b99ce3e38
--- /dev/null
+++ b/arch/nds32/math-emu/fs2siz.c
@@ -0,0 +1,29 @@
+// 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
new file mode 100644
index 000000000000..c337f0384d06
--- /dev/null
+++ b/arch/nds32/math-emu/fs2ui.c
@@ -0,0 +1,29 @@
+// 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
new file mode 100644
index 000000000000..22c5e4768044
--- /dev/null
+++ b/arch/nds32/math-emu/fs2uiz.c
@@ -0,0 +1,30 @@
+// 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
new file mode 100644
index 000000000000..6b04cec0c5c5
--- /dev/null
+++ b/arch/nds32/math-emu/fsi2d.c
@@ -0,0 +1,22 @@
+// 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
new file mode 100644
index 000000000000..689864a5df90
--- /dev/null
+++ b/arch/nds32/math-emu/fsi2s.c
@@ -0,0 +1,22 @@
+// 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/fui2d.c b/arch/nds32/math-emu/fui2d.c
new file mode 100644
index 000000000000..9689d33a8d50
--- /dev/null
+++ b/arch/nds32/math-emu/fui2d.c
@@ -0,0 +1,22 @@
+// 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
new file mode 100644
index 000000000000..f70f0762547d
--- /dev/null
+++ b/arch/nds32/math-emu/fui2s.c
@@ -0,0 +1,22 @@
+// 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;
+
+}
diff --git a/include/math-emu/op-2.h b/include/math-emu/op-2.h
index 13a374f51a22..244522b02076 100644
--- a/include/math-emu/op-2.h
+++ b/include/math-emu/op-2.h
@@ -567,16 +567,13 @@
*/
#define _FP_FRAC_ASSEMBLE_2(r, X, rsize) \
- do { \
- if (rsize <= _FP_W_TYPE_SIZE) \
- r = X##_f0; \
- else \
- { \
- r = X##_f1; \
- r <<= _FP_W_TYPE_SIZE; \
- r += X##_f0; \
- } \
- } while (0)
+ (void) (((rsize) <= _FP_W_TYPE_SIZE) \
+ ? ({ (r) = X##_f0; }) \
+ : ({ \
+ (r) = X##_f1; \
+ (r) <<= _FP_W_TYPE_SIZE; \
+ (r) += X##_f0; \
+ }))
#define _FP_FRAC_DISASSEMBLE_2(X, r, rsize) \
do { \
diff --git a/include/math-emu/op-common.h b/include/math-emu/op-common.h
index 6bdf8c61d221..f37d12877754 100644
--- a/include/math-emu/op-common.h
+++ b/include/math-emu/op-common.h
@@ -795,11 +795,12 @@ do { \
ur_ = (unsigned rtype) -r; \
else \
ur_ = (unsigned rtype) r; \
- if (rsize <= _FP_W_TYPE_SIZE) \
- __FP_CLZ(X##_e, ur_); \
- else \
- __FP_CLZ_2(X##_e, (_FP_W_TYPE)(ur_ >> _FP_W_TYPE_SIZE), \
- (_FP_W_TYPE)ur_); \
+ (void) (((rsize) <= _FP_W_TYPE_SIZE) \
+ ? ({ __FP_CLZ(X##_e, ur_); }) \
+ : ({ \
+ __FP_CLZ_2(X##_e, (_FP_W_TYPE)(ur_ >> _FP_W_TYPE_SIZE), \
+ (_FP_W_TYPE)ur_); \
+ })); \
if (rsize < _FP_W_TYPE_SIZE) \
X##_e -= (_FP_W_TYPE_SIZE - rsize); \
X##_e = rsize - X##_e - 1; \