ca7c849da3
Previously we used the i386 target, probably with all optional features disabled. However, the Pentium 4 has been released a _long_ time ago and it seems reasonable to me to take that as a minimum requirement. Upstream Go now also seems to move in this direction: https://github.com/golang/go/issues/40255 The main motivation for this is that there were floating point issues when running the tests for the math package: GOARCH=386 tinygo test math I haven't investigated what's the issue, but I strongly suspect it's caused by the weird x87 80-bit floating point format. This could perhaps be fixed in a different way (by setting the FPU precision to 64 bits) but I figured that just setting the minimum requirement to the Pentium 4 would probably be fine. If needed, we can respect the GO386 environment variable to support these very old CPUs. To support this newer CPU, I had to make sure that the stack is aligned to 16 bytes everywhere. This was not yet always the case.
17 строки
299 Б
Go
17 строки
299 Б
Go
package runtime
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import "device"
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const GOARCH = "386"
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// The bitness of the CPU (e.g. 8, 32, 64).
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const TargetBits = 32
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// Align on word boundary.
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func align(ptr uintptr) uintptr {
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return (ptr + 15) &^ 15
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}
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func getCurrentStackPointer() uintptr {
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return device.AsmFull("movl %esp, {}", nil)
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}
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