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| author | Aleksandar Markovic <aleksandar.markovic@imgtec.com> | 2016-06-10 11:57:30 +0200 |
|---|---|---|
| committer | Leon Alrae <leon.alrae@imgtec.com> | 2016-06-24 13:41:31 +0100 |
| commit | a7c04d545a97126c9df9d96623747d8613aaf7db (patch) | |
| tree | 45b391ef8b5ba9757d31e9f92eb0b98491459fa0 | |
| parent | a59eaea64686c8966b7653303660f8c26f285c77 (diff) | |
softfloat: For Mips only, correct default NaN values
Only for Mips platform, and only for cases when snan_bit_is_one is 0,
correct default NaN values (in their 16-, 32-, and 64-bit flavors).
For more info, see [1], page 84, Table 6.3 "Value Supplied When a New
Quiet NaN Is Created", and [2], page 52, Table 3.7 "Default NaN
Encodings".
[1] "MIPS Architecture For Programmers Volume II-A:
The MIPS64 Instruction Set Reference Manual",
Imagination Technologies LTD, Revision 6.04, November 13, 2015
[2] "MIPS Architecture for Programmers Volume IV-j:
The MIPS32 SIMD Architecture Module",
Imagination Technologies LTD, Revision 1.12, February 3, 2016
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
| -rw-r--r-- | fpu/softfloat-specialize.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index 981d66573e..a1bcb46a47 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -97,7 +97,11 @@ float16 float16_default_nan(float_status *status) if (status->snan_bit_is_one) { return const_float16(0x7DFF); } else { +#if defined(TARGET_MIPS) + return const_float16(0x7E00); +#else return const_float16(0xFE00); +#endif } #endif } @@ -116,7 +120,11 @@ float32 float32_default_nan(float_status *status) if (status->snan_bit_is_one) { return const_float32(0x7FBFFFFF); } else { +#if defined(TARGET_MIPS) + return const_float32(0x7FC00000); +#else return const_float32(0xFFC00000); +#endif } #endif } @@ -135,7 +143,11 @@ float64 float64_default_nan(float_status *status) if (status->snan_bit_is_one) { return const_float64(LIT64(0x7FF7FFFFFFFFFFFF)); } else { +#if defined(TARGET_MIPS) + return const_float64(LIT64(0x7FF8000000000000)); +#else return const_float64(LIT64(0xFFF8000000000000)); +#endif } #endif } |