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rgbasm supports "Q16.16" fixed-point literals

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"Qm.n" signifies an m-bit two's complement integer
with n fractional bits.
<https://en.wikipedia.org/wiki/Q_(number_format)>
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Rangi
2021-05-06 23:17:08 -04:00
parent 869021f47d
commit 5a38f6e148
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src/asm/rgbasm.5
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@@ -91,13 +91,13 @@ section.
The instructions in the macro-language generally require constant expressions. The instructions in the macro-language generally require constant expressions.
.Ss Numeric Formats .Ss Numeric Formats
There are a number of numeric formats. There are a number of numeric formats.
.Bl -column -offset indent "Fixed point (16.16)" "Prefix" .Bl -column -offset indent "Fixed point (Q16.16)" "Prefix"
.It Sy Format type Ta Sy Prefix Ta Sy Accepted characters .It Sy Format type Ta Sy Prefix Ta Sy Accepted characters
.It Hexadecimal Ta $ Ta 0123456789ABCDEF .It Hexadecimal Ta $ Ta 0123456789ABCDEF
.It Decimal Ta none Ta 0123456789 .It Decimal Ta none Ta 0123456789
.It Octal Ta & Ta 01234567 .It Octal Ta & Ta 01234567
.It Binary Ta % Ta 01 .It Binary Ta % Ta 01
.It Fixed point (16.16) Ta none Ta 01234.56789 .It Fixed point (Q16.16) Ta none Ta 01234.56789
.It Character constant Ta none Ta \(dqABYZ\(dq .It Character constant Ta none Ta \(dqABYZ\(dq
.It Gameboy graphics Ta \` Ta 0123 .It Gameboy graphics Ta \` Ta 0123
.El .El