diff options
author | Will Newton <will.newton@linaro.org> | 2014-01-07 17:17:48 +0000 |
---|---|---|
committer | Peter Maydell <peter.maydell@linaro.org> | 2014-01-08 19:07:22 +0000 |
commit | f581bf5474d2319ca37484eb63208017ac96ce0a (patch) | |
tree | f05a54d2477f6cbf9986797ea6f44cccfb58a0e0 /fpu/softfloat.c | |
parent | 38970efafdfa8a992c177563c4f0d77062b88fd9 (diff) |
softfloat: Add float to 16bit integer conversions.
ARMv8 requires support for converting 32 and 64bit floating point
values to signed and unsigned 16bit integers.
Signed-off-by: Will Newton <will.newton@linaro.org>
[PMM: updated not to incorrectly set Inexact for Invalid inputs]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'fpu/softfloat.c')
-rw-r--r-- | fpu/softfloat.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 6a6b6567d7..dbaa32c7e3 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -6491,6 +6491,46 @@ uint32 float32_to_uint32_round_to_zero( float32 a STATUS_PARAM ) return res; } +int_fast16_t float32_to_int16(float32 a STATUS_PARAM) +{ + int32_t v; + int_fast16_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float32_to_int32(a STATUS_VAR); + if (v < -0x8000) { + res = -0x8000; + } else if (v > 0x7fff) { + res = 0x7fff; + } else { + return v; + } + + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid STATUS_VAR); + return res; +} + +uint_fast16_t float32_to_uint16(float32 a STATUS_PARAM) +{ + int32_t v; + uint_fast16_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float32_to_int32(a STATUS_VAR); + if (v < 0) { + res = 0; + } else if (v > 0xffff) { + res = 0xffff; + } else { + return v; + } + + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid STATUS_VAR); + return res; +} + uint_fast16_t float32_to_uint16_round_to_zero(float32 a STATUS_PARAM) { int64_t v; @@ -6545,6 +6585,46 @@ uint32 float64_to_uint32_round_to_zero( float64 a STATUS_PARAM ) return res; } +int_fast16_t float64_to_int16(float64 a STATUS_PARAM) +{ + int64_t v; + int_fast16_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float64_to_int32(a STATUS_VAR); + if (v < -0x8000) { + res = -0x8000; + } else if (v > 0x7fff) { + res = 0x7fff; + } else { + return v; + } + + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid STATUS_VAR); + return res; +} + +uint_fast16_t float64_to_uint16(float64 a STATUS_PARAM) +{ + int64_t v; + uint_fast16_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float64_to_int32(a STATUS_VAR); + if (v < 0) { + res = 0; + } else if (v > 0xffff) { + res = 0xffff; + } else { + return v; + } + + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid STATUS_VAR); + return res; +} + uint_fast16_t float64_to_uint16_round_to_zero(float64 a STATUS_PARAM) { int64_t v; |