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esp32: enable the FPU

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This allows working with float32 values, for example it allows
testdata/float.go to work correctly (assuming an Xtensa backend bug is
fixed, see https://github.com/espressif/llvm-project/issues/41).
This commit is contained in:
Ayke van Laethem
2020-12-03 20:37:08 +01:00
committed by Ron Evans
parent 4568de556e
commit ae92ea149c
1 changed files with 5 additions and 0 deletions
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src/device/esp/esp32.S
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@@ -42,6 +42,11 @@ call_start_cpu0:
wsr.ps a2 wsr.ps a2
rsync rsync
// Enable the FPU (coprocessor 0 so the lowest bit).
movi a2, 1
wsr.cpenable a2
rsync
// Jump to the runtime start function written in Go. // Jump to the runtime start function written in Go.
call4 main call4 main