bjoernager/rust
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Fix codegen of ctlz and cttz intrinsics

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This commit is contained in:
bjorn3 2019-12-20 12:01:55 +01:00
parent 8d2db1b75d
commit a528e37302
1 changed files with 4 additions and 2 deletions
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6
src/intrinsics.rs
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@ -681,7 +681,8 @@ pub fn codegen_intrinsic_call<'tcx>(
let msb_lz = fx.bcx.ins().clz(msb);
let msb_is_zero = fx.bcx.ins().icmp_imm(IntCC::Equal, msb, 0);
let lsb_lz_plus_64 = fx.bcx.ins().iadd_imm(lsb_lz, 64);
fx.bcx.ins().select(msb_is_zero, lsb_lz_plus_64, msb_lz)
let res = fx.bcx.ins().select(msb_is_zero, lsb_lz_plus_64, msb_lz);
fx.bcx.ins().uextend(types::I128, res)
} else {
fx.bcx.ins().clz(arg)
};
@ -697,7 +698,8 @@ pub fn codegen_intrinsic_call<'tcx>(
let msb_tz = fx.bcx.ins().ctz(msb);
let lsb_is_zero = fx.bcx.ins().icmp_imm(IntCC::Equal, lsb, 0);
let msb_tz_plus_64 = fx.bcx.ins().iadd_imm(msb_tz, 64);
fx.bcx.ins().select(lsb_is_zero, msb_tz_plus_64, lsb_tz)
let res = fx.bcx.ins().select(lsb_is_zero, msb_tz_plus_64, lsb_tz);
fx.bcx.ins().uextend(types::I128, res)
} else {
fx.bcx.ins().ctz(arg)
};