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[core/c] Fix size of fastX int types per different archs/OSes

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jack gleeson committed 2026-09-21 11:40:51 -06:00
1 parent 37e519ffb2
commit ba3ddfadcc
1 file changed
+96 -19
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core/c/c.odin
+96 -19
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@@ -49,32 +49,109 @@ uint_least32_t :: builtin.u32
int_least64_t :: builtin.i64
uint_least64_t :: builtin.u64
// Same on Windows, Linux, and FreeBSD
// 7.18.1.3 Fastest minimum-width integer types
// Linux (glibc only, musl matches BSD spec)
// https://sourceware.org/cgit/glibc/tree/stdlib/stdint.h
// *BSD
// https://cgit.freebsd.org/src/tree/sys/x86/include/_types.h
// https://cgit.freebsd.org/src/tree/sys/i386/include/_types.h
// Darwin
// https://github.com/apple-oss-distributions/Libc/blob/main/include/stdint.h
//
when ODIN_ARCH == .i386 {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
when ODIN_OS == .FreeBSD || ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD { // https://cgit.freebsd.org/src/tree/sys/i386/include/_types.h
int_fast8_t :: builtin.i32
uint_fast8_t :: builtin.u32
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Darwin { // https://github.com/apple-oss-distributions/Libc/blob/main/include/stdint.h#L39
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i16
uint_fast16_t :: builtin.u16
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
}
int_fast64_t :: builtin.i64
uint_fast64_t :: builtin.u64
} else when ODIN_ARCH == .amd64 {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: long
uint_fast16_t :: ulong
int_fast32_t :: long
uint_fast32_t :: ulong
when ODIN_OS == .FreeBSD || ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD { // https://cgit.freebsd.org/src/tree/sys/x86/include/_types.h#n66
int_fast8_t :: builtin.i32
uint_fast8_t :: builtin.u32
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Darwin {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i16
uint_fast16_t :: builtin.u16
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Windows {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Linux {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: long // todo: musl is i32 to match BSD spec. No way to target it yet
uint_fast16_t :: ulong
int_fast32_t :: long
uint_fast32_t :: ulong
} else {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
}
int_fast64_t :: builtin.i64
uint_fast64_t :: builtin.u64
} else {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i16
uint_fast16_t :: builtin.u16
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
when ODIN_OS == .FreeBSD || ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD {
int_fast8_t :: builtin.i32
uint_fast8_t :: builtin.u32
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Darwin {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i16
uint_fast16_t :: builtin.u16
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
} else when ODIN_OS == .Linux {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: long // todo: musl is i32 to match BSD spec. No way to target it yet
uint_fast16_t :: ulong
int_fast32_t :: long
uint_fast32_t :: ulong
} else {
int_fast8_t :: builtin.i8
uint_fast8_t :: builtin.u8
int_fast16_t :: builtin.i32
uint_fast16_t :: builtin.u32
int_fast32_t :: builtin.i32
uint_fast32_t :: builtin.u32
}
int_fast64_t :: builtin.i64
uint_fast64_t :: builtin.u64
}