diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1997-06-17 13:20:30 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1997-06-17 13:20:30 +0000 |
| commit | 7acb77a6e7bddd4c4c5aa975bbf976927c013798 (patch) | |
| tree | 4139829ec6edb85f73774bb95cdec376758bfc73 /include/asm-alpha/fpu.h | |
| parent | 64d58d4c8cd6a89ee218301ec0dc0ebfec91a4db (diff) | |
Merge with 2.1.43.
Diffstat (limited to 'include/asm-alpha/fpu.h')
| -rw-r--r-- | include/asm-alpha/fpu.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/asm-alpha/fpu.h b/include/asm-alpha/fpu.h index f32b95f27..25148b14b 100644 --- a/include/asm-alpha/fpu.h +++ b/include/asm-alpha/fpu.h @@ -57,8 +57,28 @@ IEEE_STATUS_OVF | IEEE_STATUS_UNF | \ IEEE_STATUS_INE) +#define IEEE_SW_MASK (IEEE_TRAP_ENABLE_MASK | IEEE_STATUS_MASK) + #define IEEE_STATUS_TO_EXCSUM_SHIFT 16 #define IEEE_INHERIT (1UL<<63) /* inherit on thread create? */ +/* + * Convert the spftware IEEE trap enable and status bits into the + * hardware fpcr format. + */ + +static inline unsigned long +ieee_swcr_to_fpcr(unsigned long sw) +{ + unsigned long fp; + fp = (sw & IEEE_STATUS_MASK) << 35; + fp |= sw & IEEE_STATUS_MASK ? FPCR_SUM : 0; + fp |= (~sw & (IEEE_TRAP_ENABLE_INV + | IEEE_TRAP_ENABLE_DZE + | IEEE_TRAP_ENABLE_OVF)) << 48; + fp |= (~sw & (IEEE_TRAP_ENABLE_UNF | IEEE_TRAP_ENABLE_INE)) << 57; + return fp; +} + #endif /* __ASM_ALPHA_FPU_H */ |