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| author | Bor Grošelj Simić <bor.groseljsimic@telemach.net> | 2022-01-28 02:06:17 +0100 |
|---|---|---|
| committer | Quentin Carbonneaux <quentin@c9x.me> | 2022-01-28 09:24:15 +0100 |
| commit | 74d022f975f22fda20c0d1fe09a3f6fc7680f64f (patch) | |
| tree | a8b7e9e1e822d8eee5eb694984f7d45d8a7f43f0 /ops.h | |
| parent | b0d27d8a019811d6a4e0c0cb7ec804ab27fcec80 (diff) | |
| download | roux-74d022f975f22fda20c0d1fe09a3f6fc7680f64f.tar.gz | |
implement unsigned -> float casts
amd64 lacks an instruction for this so it has to be implemented with signed -> float casts: - Word casting is done by zero-extending the word to a long and then doing a regular signed cast. - Long casting is done by dividing by two with correct rounding if the highest bit is set and casting that to float, then adding 1 to mantissa with integer addition
Diffstat (limited to 'ops.h')
| -rw-r--r-- | ops.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/ops.h b/ops.h index 0729d46..04b0cf8 100644 --- a/ops.h +++ b/ops.h @@ -98,7 +98,9 @@ O(truncd, T(e,e,d,e, e,e,x,e), 1) X(0, 0, 1) O(stosi, T(s,s,e,e, x,x,e,e), 1) X(0, 0, 1) O(dtosi, T(d,d,e,e, x,x,e,e), 1) X(0, 0, 1) O(swtof, T(e,e,w,w, e,e,x,x), 1) X(0, 0, 1) +O(uwtof, T(e,e,w,w, e,e,x,x), 1) X(0, 0, 1) O(sltof, T(e,e,l,l, e,e,x,x), 1) X(0, 0, 1) +O(ultof, T(e,e,l,l, e,e,x,x), 1) X(0, 0, 1) O(cast, T(s,d,w,l, x,x,x,x), 1) X(0, 0, 1) /* Stack Allocation */ |