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MIPS64: [turbofan] Implemented the TruncateFloat64ToUint64 TurboFan operator.

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Port f6e689cebb

BUG=

Review URL: https://codereview.chromium.org/1463193002

Cr-Commit-Position: refs/heads/master@{#32147}
This commit is contained in:
akos.palfi 2015-11-20 05:10:55 -08:00 committed by Commit bot
parent 9951a617d5
commit 05f01e69c3
5 changed files with 49 additions and 1 deletions
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6
src/compiler/mips64/code-generator-mips64.cc
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@ -987,6 +987,12 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
__ Trunc_uw_d(i.InputDoubleRegister(0), i.OutputRegister(), scratch);
break;
}
case kMips64TruncUlD: {
FPURegister scratch = kScratchDoubleReg;
// TODO(plind): Fix wrong param order of Trunc_ul_d() macro-asm function.
__ Trunc_ul_d(i.InputDoubleRegister(0), i.OutputRegister(), scratch);
break;
}
case kMips64BitcastDL:
__ dmfc1(i.OutputRegister(), i.InputDoubleRegister(0));
break;

1
src/compiler/mips64/instruction-codes-mips64.h
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@ -76,6 +76,7 @@ namespace compiler {
V(Mips64TruncWD) \
V(Mips64TruncLD) \
V(Mips64TruncUwD) \
V(Mips64TruncUlD) \
V(Mips64CvtDW) \
V(Mips64CvtSL) \
V(Mips64CvtSUl) \

2
src/compiler/mips64/instruction-selector-mips64.cc
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@ -713,7 +713,7 @@ void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
void InstructionSelector::VisitTruncateFloat64ToUint64(Node* node) {
UNIMPLEMENTED();
VisitRR(this, kMips64TruncUlD, node);
}

37
src/mips64/macro-assembler-mips64.cc
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@ -1623,6 +1623,12 @@ void MacroAssembler::Trunc_uw_d(FPURegister fd,
mtc1(t8, fd);
}
void MacroAssembler::Trunc_ul_d(FPURegister fd, FPURegister fs,
FPURegister scratch) {
Trunc_ul_d(fs, t8, scratch);
dmtc1(t8, fd);
}
void MacroAssembler::Trunc_w_d(FPURegister fd, FPURegister fs) {
trunc_w_d(fd, fs);
@ -1677,6 +1683,37 @@ void MacroAssembler::Trunc_uw_d(FPURegister fd,
}
void MacroAssembler::Trunc_ul_d(FPURegister fd, Register rs,
FPURegister scratch) {
DCHECK(!fd.is(scratch));
DCHECK(!rs.is(at));
// Load 2^63 into scratch as its float representation.
li(at, 0x43e0000000000000);
dmtc1(at, scratch);
// Test if scratch > fd.
// If fd < 2^63 we can convert it normally.
Label simple_convert, done;
BranchF(&simple_convert, NULL, lt, fd, scratch);
// First we subtract 2^63 from fd, then trunc it to rs
// and add 2^63 to rs.
sub_d(scratch, fd, scratch);
trunc_l_d(scratch, scratch);
dmfc1(rs, scratch);
Or(rs, rs, Operand(1UL << 63));
Branch(&done);
// Simple conversion.
bind(&simple_convert);
trunc_l_d(scratch, fd);
dmfc1(rs, scratch);
bind(&done);
}
void MacroAssembler::Madd_d(FPURegister fd, FPURegister fr, FPURegister fs,
FPURegister ft, FPURegister scratch) {
if (0) { // TODO(plind): find reasonable arch-variant symbol names.

4
src/mips64/macro-assembler-mips64.h
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@ -838,6 +838,10 @@ class MacroAssembler: public Assembler {
void Trunc_uw_d(FPURegister fd, FPURegister fs, FPURegister scratch);
void Trunc_uw_d(FPURegister fd, Register rs, FPURegister scratch);
// Convert double to unsigned long.
void Trunc_ul_d(FPURegister fd, FPURegister fs, FPURegister scratch);
void Trunc_ul_d(FPURegister fd, Register rs, FPURegister scratch);
void Trunc_w_d(FPURegister fd, FPURegister fs);
void Round_w_d(FPURegister fd, FPURegister fs);
void Floor_w_d(FPURegister fd, FPURegister fs);