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gen-dev: impl Num.neg for Dec,F32,F64

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Dec negation was implemented across gen-dev, gen-llvm, gen-wasm as a call
to the compiled zig function `bitcode::DEC_NEGATE`.

f32 and f64 negation were implemented already for gen-llvm, gen-wasm.

for gen-dev x86_64, float negation is implemented by flipping the sign
bit, which means `xorps` for f32, and `xorpd` for f64

for gen-dev aarch64, there is conveniently a `fneg` instruction
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shua 2024-11-20 22:38:19 +01:00
parent 6a3db1e59a
commit a98acff0b9
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6 changed files with 156 additions and 2 deletions
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crates/compiler/gen_llvm/src/llvm/lowlevel.rs
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@ -2215,6 +2215,7 @@ fn build_dec_unary_op<'a, 'ctx>(
match op {
NumAbs => dec_unary_op(env, bitcode::DEC_ABS, arg),
NumNeg => dec_unary_op(env, bitcode::DEC_NEGATE, arg),
NumAcos => dec_unary_op(env, bitcode::DEC_ACOS, arg),
NumAsin => dec_unary_op(env, bitcode::DEC_ASIN, arg),
NumAtan => dec_unary_op(env, bitcode::DEC_ATAN, arg),