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softfloat: Revert and reimplement remaining portions of 75d62a5856 and 3430b0be36

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Revert the remaining portions of commits 75d62a5856 and 3430b0be36
which are under a SoftFloat-2b license, ie the functions
uint64_to_float32() and uint64_to_float64(). (The float64_to_uint64()
and float64_to_uint64_round_to_zero() functions were completely
rewritten in commits fb3ea83aa and 0a87a3107d so can stay.)

Reimplement from scratch the uint64_to_float64() and uint64_to_float32()
conversion functions.

[This is a mechanical squashing together of two separate "revert"
and "reimplement" patches.]

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1421073508-23909-3-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2015-01-12 14:38:26 +00:00
parent a7d1ac78e0
commit 6bb8e0f130
2 changed files with 67 additions and 37 deletions
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4
include/fpu/softfloat.h
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@ -273,11 +273,11 @@ float64 uint32_to_float64(uint32_t STATUS_PARAM);
floatx80 int32_to_floatx80(int32_t STATUS_PARAM);
float128 int32_to_float128(int32_t STATUS_PARAM);
float32 int64_to_float32(int64_t STATUS_PARAM);
float32 uint64_to_float32(uint64_t STATUS_PARAM);
float64 int64_to_float64(int64_t STATUS_PARAM);
float64 uint64_to_float64(uint64_t STATUS_PARAM);
floatx80 int64_to_floatx80(int64_t STATUS_PARAM);
float128 int64_to_float128(int64_t STATUS_PARAM);
float32 uint64_to_float32(uint64_t STATUS_PARAM);
float64 uint64_to_float64(uint64_t STATUS_PARAM);
float128 uint64_to_float128(uint64_t STATUS_PARAM);
/* We provide the int16 versions for symmetry of API with float-to-int */