diff options
| author | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-09-20 14:58:43 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@gmx.de> | 2013-09-20 14:58:43 +0200 |
| commit | 539fe6990fecc38bd3b634be5857da3ee59bafee (patch) | |
| tree | 79bbca17cf6af0c3e34869eba2e128732e06c8c1 /sys/src/cmd/5c/cgen.c | |
| parent | 171aafcc229b0b2d1fb058d09eb4170008f91eb6 (diff) | |
5c: apply richard millers 5c-nan-cmp patch (from sources)
On ARM, it turns out that comparisons with NaN can be made to do the
right thing with no code penalty, by a more careful selection of
condition code values in the subsequent conditional branch. The
meaning of the CC bits in the PSR is subtly different when they've
been copied from the floating point status register.
Suggested patch is 5c-nan-cmp (works on both vfp and emulated arm7500).
Diffstat (limited to 'sys/src/cmd/5c/cgen.c')
| -rw-r--r-- | sys/src/cmd/5c/cgen.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sys/src/cmd/5c/cgen.c b/sys/src/cmd/5c/cgen.c index c639b180f..18971103b 100644 --- a/sys/src/cmd/5c/cgen.c +++ b/sys/src/cmd/5c/cgen.c @@ -701,7 +701,7 @@ boolgen(Node *n, int true, Node *nn) if(true) o = comrel[relindex(o)]; if(typefd[n->type->etype]) { - gopcode(o, nodfconst(0), &nod, Z); + gopcode(true ? o | BTRUE : o, nodfconst(0), &nod, Z); } else gopcode(o, nodconst(0), &nod, Z); regfree(&nod); @@ -800,14 +800,14 @@ boolgen(Node *n, int true, Node *nn) regalloc(&nod, r, nn); cgenrel(r, &nod, 1); o = invrel[relindex(o)]; - gopcode(o, l, &nod, Z); + gopcode(true ? o | BTRUE : o, l, &nod, Z); regfree(&nod); goto com; } if(sconst(r)) { regalloc(&nod, l, nn); cgenrel(l, &nod, 1); - gopcode(o, r, &nod, Z); + gopcode(true ? o | BTRUE : o, r, &nod, Z); regfree(&nod); goto com; } @@ -822,7 +822,7 @@ boolgen(Node *n, int true, Node *nn) regalloc(&nod1, l, Z); cgenrel(l, &nod1, 1); } - gopcode(o, &nod, &nod1, Z); + gopcode(true ? o | BTRUE : o, &nod, &nod1, Z); regfree(&nod); regfree(&nod1); |