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| author | Quentin Carbonneaux <quentin@c9x.me> | 2017-06-06 10:09:31 -0400 |
|---|---|---|
| committer | Quentin Carbonneaux <quentin@c9x.me> | 2017-06-06 10:09:31 -0400 |
| commit | 5dcf8c14cbefb3f96262e5fbe5168cfe48e6fd3a (patch) | |
| tree | 0261a28ea1457d1c1841c3530ef10470f4487a0f /amd64 | |
| parent | 66288673cdce588bf81612c0599047665afefce7 (diff) | |
| download | roux-5dcf8c14cbefb3f96262e5fbe5168cfe48e6fd3a.tar.gz | |
fix floating-point division
It never worked until today.
Diffstat (limited to 'amd64')
| -rw-r--r-- | amd64/emit.c | 10 | ||||
| -rw-r--r-- | amd64/isel.c | 2 |
2 files changed, 12 insertions, 0 deletions
diff --git a/amd64/emit.c b/amd64/emit.c index cd485bb..4d4d3be 100644 --- a/amd64/emit.c +++ b/amd64/emit.c @@ -405,6 +405,16 @@ emitins(Ins i, Fn *fn, FILE *f) break; } goto Table; + case Odiv: + /* adjust the instruction when the conversion to + * a 2-address division is impossible */ + if (req(i.to, i.arg[1])) { + i.arg[1] = TMP(XMM0+15); + emitf("mov%k %=, %1", &i, fn, f); + emitf("mov%k %0, %=", &i, fn, f); + i.arg[0] = i.to; + } + goto Table; case Ocopy: /* make sure we don't emit useless copies, * also, we can use a trick to load 64-bits diff --git a/amd64/isel.c b/amd64/isel.c index 39fc9e8..180439b 100644 --- a/amd64/isel.c +++ b/amd64/isel.c @@ -200,6 +200,8 @@ sel(Ins i, ANum *an, Fn *fn) case Orem: case Oudiv: case Ourem: + if (KBASE(k) == 1) + goto Emit; if (i.op == Odiv || i.op == Oudiv) r0 = TMP(RAX), r1 = TMP(RDX); else |