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0.4.0
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---
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- **compiler**
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- switch to the hardfloat ABI on ARM, which is more widely used
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- avoid a dependency on `objcopy` (`arm-none-eabi-objcopy` etc.)
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- fix a bug in `make([]T, n)` where `n` is 64-bits on a 32-bit platform
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- adapt to a change in the AVR backend in LLVM 8
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- directly support the .uf2 firmware format as used on Adafruit boards
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- fix a bug when calling `panic()` at init time outside of the main package
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- implement nil checks, which results in a ~5% increase in code size
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- inline slice bounds checking, which results in a ~1% decrease in code size
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- **targets**
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- `samd21`: fix a bug in port B pins
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- `samd21`: implement SPI peripheral
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- `samd21`: implement ADC peripheral
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- `stm32`: fix a bug in timekeeping
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- `wasm`: fix a bug in `wasm_exec.js` that caused corruption in linear memory
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when running on Node.js.
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0.3.0
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---
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- **compiler**
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- remove old `-initinterp` flag
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- add support for macOS
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- **cgo**
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- add support for bool/float/complex types
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- **standard library**
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- `device/arm`: add support to disable/enable hardware interrupts
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- `machine`: add CPU frequency for nrf-based boards
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- `syscall`: add support for darwin/amd64
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- **targets**
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- `circuitplay_express`: add support for this board
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- `microbit`: add regular pin constants
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- `samd21`: fix time function for goroutine support
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- `samd21`: add support for USB-CDC (serial over USB)
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- `samd21`: add support for pins in port B
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- `samd21`: add support for pullup and pulldown pins
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- `wasm`: add support for Safari in example
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0.2.0
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---
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- **command line**
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- add version subcommand
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- **compiler**
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- fix a bug in floating point comparisons with NaN values
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- fix a bug when calling `panic` in package initialization code
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- add support for comparing `complex64` and `complex128`
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- **cgo**
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- add support for external globals
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- add support for pointers and function pointers
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- **standard library**
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- `fmt`: initial support, `fmt.Println` works
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- `math`: support for most/all functions
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- `os`: initial support (only stdin/stdout/stderr)
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- `reflect`: initial support
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- `syscall`: add support for amd64, arm, and arm64
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