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all: add target-features string to all targets

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This makes sure that the LLVM target features match the one generated by
Clang:

  - This fixes a bug introduced when setting the target CPU for all
    targets: Cortex-M4 would now start using floating point operations
    while they were disabled in C.
  - This will make it possible in the future to inline C functions in Go
    and vice versa. This will need some more work though.

There is a code size impact. Cortex-M4 targets are increased slightly in
binary size while Cortex-M0 targets tend to be reduced a little bit.
Other than that, there is little impact.
This commit is contained in:
Ayke van Laethem
2021-11-06 15:29:54 +01:00
committed by Ron Evans
parent af4d0fe191
commit 78fec3719f
17 changed files with 53 additions and 30 deletions
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targets/cortex-m0plus.json
+2 -1
View File
@@ -1,5 +1,6 @@
{
"inherits": ["cortex-m"],
"llvm-target": "thumbv6m-unknown-unknown-eabi",
"cpu": "cortex-m0plus"
"cpu": "cortex-m0plus",
"features": "+armv6-m,+soft-float,+strict-align,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
}