Lower the fcmp instruction for <4 x float> operands.
Most fcmp conditions map directly to single x86 instructions. For
these, the lowering is table driven.
BUG=none
R=jvoung@chromium.org, stichnot@chromium.org
Review URL: https://codereview.chromium.org/413053002
diff --git a/src/IceInstX8632.cpp b/src/IceInstX8632.cpp
index 93a872c..1698dfe 100644
--- a/src/IceInstX8632.cpp
+++ b/src/IceInstX8632.cpp
@@ -36,6 +36,18 @@
const size_t InstX8632BrAttributesSize =
llvm::array_lengthof(InstX8632BrAttributes);
+const struct InstX8632CmppsAttributes_ {
+ const char *EmitString;
+} InstX8632CmppsAttributes[] = {
+#define X(tag, emit) \
+ { emit } \
+ ,
+ ICEINSTX8632CMPPS_TABLE
+#undef X
+ };
+const size_t InstX8632CmppsAttributesSize =
+ llvm::array_lengthof(InstX8632CmppsAttributes);
+
const struct TypeX8632Attributes_ {
const char *CvtString; // i (integer), s (single FP), d (double FP)
const char *SdSsString; // ss, sd, or <blank>
@@ -149,6 +161,13 @@
addSource(Source);
}
+InstX8632Cmpps::InstX8632Cmpps(Cfg *Func, Variable *Dest, Operand *Source,
+ InstX8632Cmpps::CmppsCond Condition)
+ : InstX8632(Func, InstX8632::Cmpps, 2, Dest), Condition(Condition) {
+ addSource(Dest);
+ addSource(Source);
+}
+
InstX8632Cmpxchg::InstX8632Cmpxchg(Cfg *Func, Operand *DestOrAddr,
Variable *Eax, Variable *Desired,
bool Locked)
@@ -695,6 +714,28 @@
dumpSources(Func);
}
+void InstX8632Cmpps::emit(const Cfg *Func) const {
+ Ostream &Str = Func->getContext()->getStrEmit();
+ assert(getSrcSize() == 2);
+ assert(Condition < InstX8632CmppsAttributesSize);
+ Str << "\t";
+ Str << "cmp" << InstX8632CmppsAttributes[Condition].EmitString << "ps"
+ << "\t";
+ getDest()->emit(Func);
+ Str << ", ";
+ getSrc(1)->emit(Func);
+ Str << "\n";
+}
+
+void InstX8632Cmpps::dump(const Cfg *Func) const {
+ Ostream &Str = Func->getContext()->getStrDump();
+ assert(Condition < InstX8632CmppsAttributesSize);
+ dumpDest(Func);
+ Str << " = cmp" << InstX8632CmppsAttributes[Condition].EmitString << "ps"
+ << "\t";
+ dumpSources(Func);
+}
+
void InstX8632Cmpxchg::emit(const Cfg *Func) const {
Ostream &Str = Func->getContext()->getStrEmit();
assert(getSrcSize() == 3);
