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compiler_rt: fix and improve documentation

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- In Integer Bit Operations, use zeros consistently and fix the
    incorrect function descriptions
  - In ucmp, fix the incorrect signedness of the operands
  - In Integer Arithmetic, document the signedness of the operands in
    div, udiv, mod, umod, udivmod and divmod as it is done in LLVM
    documentation
  - In Float Conversion, replace "int_to_float" to "int to float" and
    "uint_to_float" to "uint to float"
This commit is contained in:
Manlio Perillo 2023-02-03 12:44:52 +01:00 committed by Veikka Tuominen
parent 693b12f8e1
commit c1f71963a9
1 changed files with 20 additions and 20 deletions
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lib/compiler_rt/README.md
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@ -51,31 +51,31 @@ Integer and Float Operations
| Done | Name | a | b | Out | Comment |
| ------ | ------------- | ---- | ---- | ---- | ------------------------------ |
| | | | | | **Integer Bit Operations** |
| ✓ | __clzsi2 | u32 | ∅ | i32 | count leading zeroes |
| ✓ | __clzdi2 | u64 | ∅ | i32 | count leading zeroes |
| ✓ | __clzti2 | u128 | ∅ | i32 | count trailing zeros |
| ✓ | __clzsi2 | u32 | ∅ | i32 | count leading zeros |
| ✓ | __clzdi2 | u64 | ∅ | i32 | count leading zeros |
| ✓ | __clzti2 | u128 | ∅ | i32 | count leading zeros |
| ✓ | __ctzsi2 | u32 | ∅ | i32 | count trailing zeros |
| ✓ | __ctzdi2 | u64 | ∅ | i32 | count trailing zeros |
| ✓ | __ctzti2 | u128 | ∅ | i32 | count leading zeroes |
| ✓ | __ffssi2 | u32 | ∅ | i32 | count leading zeroes |
| ✓ | __ffsdi2 | u64 | ∅ | i32 | count leading zeroes |
| ✓ | __ffsti2 | u128 | ∅ | i32 | count leading zeroes |
| ✓ | __paritysi2 | u32 | ∅ | i32 | find least significant 1 bit |
| ✓ | __paritydi2 | u64 | ∅ | i32 | find least significant 1 bit |
| ✓ | __parityti2 | u128 | ∅ | i32 | find least significant 1 bit |
| ✓ | __ctzti2 | u128 | ∅ | i32 | count trailing zeros |
| ✓ | __ffssi2 | u32 | ∅ | i32 | find least significant 1 bit |
| ✓ | __ffsdi2 | u64 | ∅ | i32 | find least significant 1 bit |
| ✓ | __ffsti2 | u128 | ∅ | i32 | find least significant 1 bit |
| ✓ | __paritysi2 | u32 | ∅ | i32 | bit parity |
| ✓ | __paritydi2 | u64 | ∅ | i32 | bit parity |
| ✓ | __parityti2 | u128 | ∅ | i32 | bit parity |
| ✓ | __popcountsi2 | u32 | ∅ | i32 | bit population |
| ✓ | __popcountdi2 | u64 | ∅ | i32 | bit population |
| ✓ | __popcountti2 | u128 | ∅ | i32 | bit population |
| ✓ | __bswapsi2 | u32 | ∅ | i32 | bit parity |
| ✓ | __bswapdi2 | u64 | ∅ | i32 | bit parity |
| ✓ | __bswapti2 | u128 | ∅ | i32 | bit parity |
| ✓ | __bswapsi2 | u32 | ∅ | i32 | byte swap |
| ✓ | __bswapdi2 | u64 | ∅ | i32 | byte swap |
| ✓ | __bswapti2 | u128 | ∅ | i32 | byte swap |
| | | | | | **Integer Comparison** |
| ✓ | __cmpsi2 | i32 | i32 | i32 | `(a<b) -> 0, (a==b) -> 1, (a>b) -> 2` |
| ✓ | __cmpdi2 | i64 | i64 | i32 | .. |
| ✓ | __cmpti2 | i128 | i128 | i32 | .. |
| ✓ | __ucmpsi2 | i32 | i32 | i32 | `(a<b) -> 0, (a==b) -> 1, (a>b) -> 2` |
| ✓ | __ucmpdi2 | i64 | i64 | i32 | .. |
| ✓ | __ucmpti2 | i128 | i128 | i32 | .. |
| ✓ | __ucmpsi2 | u32 | u32 | i32 | `(a<b) -> 0, (a==b) -> 1, (a>b) -> 2` |
| ✓ | __ucmpdi2 | u64 | u64 | i32 | .. |
| ✓ | __ucmpti2 | u128 | u128 | i32 | .. |
| | | | | | **Integer Arithmetic** |
| ✗ | __ashlsi3 | i32 | i32 | i32 | `a << b` [^unused_rl78] |
| ✓ | __ashldi3 | i64 | i32 | i64 | .. |
@ -165,7 +165,7 @@ Integer and Float Operations
| ✓ | _Qp_qtos |*f128 | ∅ | f32 | .. SPARC |
| ✓ | __trunckfdf2 | f128 | ∅ | f64 | .. PPC |
| ✓ | _Qp_qtod |*f128 | ∅ | f64 | .. SPARC |
| ✓ | __fixhfsi | f16 | ∅ | i32 | rounding towards zero |
| ✓ | __fixhfsi | f16 | ∅ | i32 | float to int, rounding towards zero |
| ✓ | __fixsfsi | f32 | ∅ | i32 | .. |
| ✓ | __fixdfsi | f64 | ∅ | i32 | .. |
| ✓ | __fixtfsi | f128 | ∅ | i32 | .. |
@ -180,7 +180,7 @@ Integer and Float Operations
| ✓ | __fixdfti | f64 | ∅ | i128 | .. |
| ✓ | __fixtfti | f128 | ∅ | i128 | .. |
| ✓ | __fixxfti | f80 | ∅ | i128 | .. |
| ✓ | __fixunshfsi | f16 | ∅ | u32 | rounding towards zero. negative values become 0. |
| ✓ | __fixunshfsi | f16 | ∅ | u32 | float to uint, rounding towards zero. negative values become 0. |
| ✓ | __fixunssfsi | f32 | ∅ | u32 | .. |
| ✓ | __fixunsdfsi | f64 | ∅ | u32 | .. |
| ✓ | __fixunstfsi | f128 | ∅ | u32 | .. |
@ -195,7 +195,7 @@ Integer and Float Operations
| ✓ | __fixunsdfti | f64 | ∅ | u128 | .. |
| ✓ | __fixunstfti | f128 | ∅ | u128 | .. |
| ✓ | __fixunsxfti | f80 | ∅ | u128 | .. |
| ✓ | __floatsihf | i32 | ∅ | f16 | int_to_float conversions |
| ✓ | __floatsihf | i32 | ∅ | f16 | int to float |
| ✓ | __floatsisf | i32 | ∅ | f32 | .. |
| ✓ | __floatsidf | i32 | ∅ | f64 | .. |
| ✓ | __floatsitf | i32 | ∅ | f128 | .. |
@ -209,7 +209,7 @@ Integer and Float Operations
| ✓ | __floattidf | i128 | ∅ | f64 | .. |
| ✓ | __floattitf | i128 | ∅ | f128 | .. |
| ✓ | __floattixf | i128 | ∅ | f80 | .. |
| ✓ | __floatunsihf | u32 | ∅ | f16 | uint_to_float conversions |
| ✓ | __floatunsihf | u32 | ∅ | f16 | uint to float |
| ✓ | __floatunsisf | u32 | ∅ | f32 | .. |
| ✓ | __floatunsidf | u32 | ∅ | f64 | .. |
| ✓ | __floatunsitf | u32 | ∅ | f128 | .. |