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8fe2751758
Add functions for performing conversion of 8- and 16-bit integers to floats.
Since the ranges of all these integer types lie within the what can be exactly
represented by both single- and double-precision floating-point values, these
conversions always succeed.
Add a note about the float/1 function.
library/float.m:
Add the new conversion functions.
Note that the behaviour of float/1 is currently undefined if the
argument is outside the range that the floating-point type can exactly
represent integers.
Fix section headings.
tests/hard_coded/Mmakfile:;
tests/hard_coded/float_conv.{m,exp}
A test of int->float conversion; currently for 8- and 16-bit integers.
43 lines
958 B
Plaintext
43 lines
958 B
Plaintext
*** Testing int8 -> float conversion ***
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from_int8(-128i8) = -128.0
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from_int8(-1i8) = -1.0
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from_int8(0i8) = 0.0
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from_int8(8i8) = 8.0
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from_int8(16i8) = 16.0
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from_int8(32i8) = 32.0
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from_int8(64i8) = 64.0
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from_int8(127i8) = 127.0
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*** Testing uint8 -> float conversion ***
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from_uint8(0u8) = 0.0
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from_uint8(1u8) = 1.0
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from_uint8(2u8) = 2.0
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from_uint8(8u8) = 8.0
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from_uint8(23u8) = 23.0
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from_uint8(127u8) = 127.0
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from_uint8(128u8) = 128.0
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from_uint8(255u8) = 255.0
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*** Testing int16 -> float conversion ***
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from_int16(-32768i16) = -32768.0
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from_int16(-129i16) = -129.0
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from_int16(-128i16) = -128.0
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from_int16(-1i16) = -1.0
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from_int16(0i16) = 0.0
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from_int16(1i16) = 1.0
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from_int16(127i16) = 127.0
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from_int16(128i16) = 128.0
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from_int16(32767i16) = 32767.0
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*** Testing uint16 -> float conversion ***
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from_uint16(0u16) = 0.0
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from_uint16(1u16) = 1.0
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from_uint16(8u16) = 8.0
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from_uint16(127u16) = 127.0
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from_uint16(128u16) = 128.0
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from_uint16(32767u16) = 32767.0
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