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Fix ordering for FMA and change FMS to FNMA #81

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Sep 12, 2022
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Fix ordering for FMA and change FMS to FNMA #81

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16 changes: 8 additions & 8 deletions proposals/relaxed-simd/Overview.md
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Expand Up @@ -163,19 +163,19 @@ def relaxed_i32x4_trunc_f64x2_zero_u(a : f64x2) -> i32x4:
result[i] = r
```

### Relaxed fused multiply-add and fused multiply-subtract
### Relaxed fused multiply-add and fused negative multiply-add

- `relaxed f32x4.fma`
- `relaxed f32x4.fms`
- `relaxed f32x4.fnma`
- `relaxed f64x2.fma`
- `relaxed f64x2.fms`
- `relaxed f64x2.fnma`

All the instructions take 3 operands, `a`, `b`, `c`, perform `a + (b * c)` or `a - (b * c)`:
All the instructions take 3 operands, `a`, `b`, `c`, perform `a * b + c` or `-(a * b) + c`:

- `relaxed f32x4.fma(a, b, c) = a + (b * c)`
- `relaxed f32x4.fms(a, b, c) = a - (b * c)`
- `relaxed f64x2.fma(a, b, c) = a + (b * c)`
- `relaxed f64x2.fms(a, b, c) = a - (b * c)`
- `relaxed f32x4.fma(a, b, c) = a * b + c`
- `relaxed f32x4.fnma(a, b, c) = -(a * b) + c`
- `relaxed f64x2.fma(a, b, c) = a * b + c`
- `relaxed f64x2.fnma(a, b, c) = -(a * b) + c`

where:

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