From bedf142b8bba4331ed93161292a4ce4f8cde7308 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Mon, 7 Nov 2005 21:12:08 +0000 Subject: [PATCH] [ARM] 3118/1: fix and reenable nwfpe extended precision emulation for big-endian Patch from Lennert Buytenhek nwfpe extended precision emulation used to be broken on big-endian and was therefore disabled. This patch fixes nwfpe so that it copies extended precision floats to/from userspace in the proper word order (similar to patch #2046, see the description of that patch for an explanation) and reenables the Kconfig option. Signed-off-by: Lennert Buytenhek Signed-off-by: Russell King --- arch/arm/Kconfig | 2 +- arch/arm/nwfpe/fpa11.h | 2 +- arch/arm/nwfpe/fpa11_cpdt.c | 10 ++++++++++ arch/arm/nwfpe/softfloat.h | 15 ++++++++++----- 4 files changed, 22 insertions(+), 7 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 296bc03d1c..056adc8a7d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -585,7 +585,7 @@ config FPE_NWFPE config FPE_NWFPE_XP bool "Support extended precision" - depends on FPE_NWFPE && !CPU_BIG_ENDIAN + depends on FPE_NWFPE help Say Y to include 80-bit support in the kernel floating-point emulator. Otherwise, only 32 and 64-bit support is compiled in. diff --git a/arch/arm/nwfpe/fpa11.h b/arch/arm/nwfpe/fpa11.h index 9677ae8448..da4c616b6c 100644 --- a/arch/arm/nwfpe/fpa11.h +++ b/arch/arm/nwfpe/fpa11.h @@ -60,7 +60,7 @@ typedef union tagFPREG { #ifdef CONFIG_FPE_NWFPE_XP floatx80 fExtended; #else - int padding[3]; + u32 padding[3]; #endif } FPREG; diff --git a/arch/arm/nwfpe/fpa11_cpdt.c b/arch/arm/nwfpe/fpa11_cpdt.c index b0db5cbcc3..32859fa8dc 100644 --- a/arch/arm/nwfpe/fpa11_cpdt.c +++ b/arch/arm/nwfpe/fpa11_cpdt.c @@ -59,8 +59,13 @@ static inline void loadExtended(const unsigned int Fn, const unsigned int __user p = (unsigned int *) &fpa11->fpreg[Fn].fExtended; fpa11->fType[Fn] = typeExtended; get_user(p[0], &pMem[0]); /* sign & exponent */ +#ifdef __ARMEB__ + get_user(p[1], &pMem[1]); /* ms bits */ + get_user(p[2], &pMem[2]); /* ls bits */ +#else get_user(p[1], &pMem[2]); /* ls bits */ get_user(p[2], &pMem[1]); /* ms bits */ +#endif } #endif @@ -177,8 +182,13 @@ static inline void storeExtended(const unsigned int Fn, unsigned int __user *pMe } put_user(val.i[0], &pMem[0]); /* sign & exp */ +#ifdef __ARMEB__ + put_user(val.i[1], &pMem[1]); /* msw */ + put_user(val.i[2], &pMem[2]); +#else put_user(val.i[1], &pMem[2]); put_user(val.i[2], &pMem[1]); /* msw */ +#endif } #endif diff --git a/arch/arm/nwfpe/softfloat.h b/arch/arm/nwfpe/softfloat.h index 1301d97e03..978c699673 100644 --- a/arch/arm/nwfpe/softfloat.h +++ b/arch/arm/nwfpe/softfloat.h @@ -51,12 +51,17 @@ input or output the `floatx80' type will be defined. Software IEC/IEEE floating-point types. ------------------------------------------------------------------------------- */ -typedef unsigned long int float32; -typedef unsigned long long float64; +typedef u32 float32; +typedef u64 float64; typedef struct { - unsigned short high; - unsigned short __padding; - unsigned long long low; +#ifdef __ARMEB__ + u16 __padding; + u16 high; +#else + u16 high; + u16 __padding; +#endif + u64 low; } floatx80; /* -- 2.39.5