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https://github.com/corda/corda.git
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implement longCompareRR
This commit is contained in:
Joel Dice
parent
6f5cc9f45f
commit
b683d836c3
266
src/x86.cpp
266
src/x86.cpp
@ -1589,128 +1589,6 @@ unsignedShiftRightCR(Context* c, unsigned size, Assembler::Constant* a,
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doShift(c, unsignedShiftRightRR, 0xe8, size, a, b);
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}
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void
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longCompareCR(Context* c, unsigned size UNUSED, Assembler::Constant* a,
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Assembler::Register* b)
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{
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assert(c, size == 8);
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int64_t v = a->value->value();
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ResolvedPromise negativePromise(-1);
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Assembler::Constant negative(&negativePromise);
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ResolvedPromise zeroPromise(0);
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Assembler::Constant zero(&zeroPromise);
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ResolvedPromise positivePromise(1);
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Assembler::Constant positive(&positivePromise);
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if (BytesPerWord == 8) {
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compareCR(c, 8, a, b);
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c->code.append(0x0f);
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c->code.append(0x8c); // jl
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unsigned less = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x8f); // jg
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unsigned greater = c->code.length();
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c->code.append4(0);
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moveCR(c, 4, &zero, b);
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c->code.append(0xe9); // jmp
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unsigned nextFirst = c->code.length();
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c->code.append4(0);
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int32_t lessOffset = c->code.length() - less - 4;
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c->code.set(less, &lessOffset, 4);
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moveCR(c, 4, &negative, b);
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c->code.append(0xe9); // jmp
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unsigned nextSecond = c->code.length();
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c->code.append4(0);
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int32_t greaterOffset = c->code.length() - greater - 4;
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c->code.set(greater, &greaterOffset, 4);
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moveCR(c, 4, &positive, b);
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int32_t nextFirstOffset = c->code.length() - nextFirst - 4;
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c->code.set(nextFirst, &nextFirstOffset, 4);
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int32_t nextSecondOffset = c->code.length() - nextSecond - 4;
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c->code.set(nextSecond, &nextSecondOffset, 4);
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} else {
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ResolvedPromise low(v & 0xFFFFFFFF);
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Assembler::Constant al(&low);
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ResolvedPromise high((v >> 32) & 0xFFFFFFFF);
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Assembler::Constant ah(&high);
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Assembler::Register bh(b->high);
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compareCR(c, 4, &ah, &bh);
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c->code.append(0x0f);
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c->code.append(0x8c); // jl
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unsigned less = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x8f); // jg
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unsigned greater = c->code.length();
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c->code.append4(0);
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compareCR(c, 4, &al, b);
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c->code.append(0x0f);
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c->code.append(0x82); // ja
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unsigned above = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x87); // jb
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unsigned below = c->code.length();
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c->code.append4(0);
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moveCR(c, 4, &zero, b);
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c->code.append(0xe9); // jmp
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unsigned nextFirst = c->code.length();
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c->code.append4(0);
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int32_t lessOffset = c->code.length() - less - 4;
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c->code.set(less, &lessOffset, 4);
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int32_t aboveOffset = c->code.length() - above - 4;
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c->code.set(above, &aboveOffset, 4);
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moveCR(c, 4, &negative, b);
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c->code.append(0xe9); // jmp
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unsigned nextSecond = c->code.length();
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c->code.append4(0);
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int32_t greaterOffset = c->code.length() - greater - 4;
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c->code.set(greater, &greaterOffset, 4);
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int32_t belowOffset = c->code.length() - below - 4;
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c->code.set(below, &belowOffset, 4);
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moveCR(c, 4, &positive, b);
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int32_t nextFirstOffset = c->code.length() - nextFirst - 4;
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c->code.set(nextFirst, &nextFirstOffset, 4);
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int32_t nextSecondOffset = c->code.length() - nextSecond - 4;
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c->code.set(nextSecond, &nextSecondOffset, 4);
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}
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}
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void
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compareRR(Context* c, unsigned size, Assembler::Register* a,
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Assembler::Register* b)
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@ -1828,6 +1706,148 @@ compareRC(Context* c, unsigned size, Assembler::Register* a,
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c->client->releaseTemporary(tmp.low);
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}
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void
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longCompare(Context* c, Assembler::Operand* al, Assembler::Operand* ah,
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Assembler::Operand* bl, Assembler::Operand* bh,
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BinaryOperationType compare, BinaryOperationType move)
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{
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ResolvedPromise negativePromise(-1);
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Assembler::Constant negative(&negativePromise);
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ResolvedPromise zeroPromise(0);
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Assembler::Constant zero(&zeroPromise);
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ResolvedPromise positivePromise(1);
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Assembler::Constant positive(&positivePromise);
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if (BytesPerWord == 8) {
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compare(c, 8, al, bl);
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c->code.append(0x0f);
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c->code.append(0x8c); // jl
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unsigned less = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x8f); // jg
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unsigned greater = c->code.length();
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c->code.append4(0);
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move(c, 4, &zero, bl);
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c->code.append(0xe9); // jmp
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unsigned nextFirst = c->code.length();
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c->code.append4(0);
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int32_t lessOffset = c->code.length() - less - 4;
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c->code.set(less, &lessOffset, 4);
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move(c, 4, &negative, bl);
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c->code.append(0xe9); // jmp
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unsigned nextSecond = c->code.length();
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c->code.append4(0);
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int32_t greaterOffset = c->code.length() - greater - 4;
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c->code.set(greater, &greaterOffset, 4);
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move(c, 4, &positive, bl);
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int32_t nextFirstOffset = c->code.length() - nextFirst - 4;
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c->code.set(nextFirst, &nextFirstOffset, 4);
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int32_t nextSecondOffset = c->code.length() - nextSecond - 4;
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c->code.set(nextSecond, &nextSecondOffset, 4);
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} else {
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compare(c, 4, ah, bh);
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c->code.append(0x0f);
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c->code.append(0x8c); // jl
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unsigned less = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x8f); // jg
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unsigned greater = c->code.length();
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c->code.append4(0);
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compare(c, 4, al, bl);
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c->code.append(0x0f);
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c->code.append(0x82); // ja
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unsigned above = c->code.length();
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c->code.append4(0);
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c->code.append(0x0f);
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c->code.append(0x87); // jb
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unsigned below = c->code.length();
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c->code.append4(0);
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move(c, 4, &zero, bl);
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c->code.append(0xe9); // jmp
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unsigned nextFirst = c->code.length();
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c->code.append4(0);
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int32_t lessOffset = c->code.length() - less - 4;
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c->code.set(less, &lessOffset, 4);
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int32_t aboveOffset = c->code.length() - above - 4;
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c->code.set(above, &aboveOffset, 4);
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move(c, 4, &negative, bl);
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c->code.append(0xe9); // jmp
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unsigned nextSecond = c->code.length();
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c->code.append4(0);
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int32_t greaterOffset = c->code.length() - greater - 4;
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c->code.set(greater, &greaterOffset, 4);
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int32_t belowOffset = c->code.length() - below - 4;
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c->code.set(below, &belowOffset, 4);
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move(c, 4, &positive, bl);
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int32_t nextFirstOffset = c->code.length() - nextFirst - 4;
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c->code.set(nextFirst, &nextFirstOffset, 4);
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int32_t nextSecondOffset = c->code.length() - nextSecond - 4;
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c->code.set(nextSecond, &nextSecondOffset, 4);
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}
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}
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void
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longCompareCR(Context* c, unsigned size UNUSED, Assembler::Constant* a,
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Assembler::Register* b)
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{
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assert(c, size == 8);
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int64_t v = a->value->value();
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ResolvedPromise low(v & 0xFFFFFFFF);
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Assembler::Constant al(&low);
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ResolvedPromise high((v >> 32) & 0xFFFFFFFF);
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Assembler::Constant ah(&high);
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Assembler::Register bh(b->high);
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longCompare(c, &al, &ah, b, &bh, CAST2(compareCR), CAST2(moveCR));
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}
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void
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longCompareRR(Context* c, unsigned size UNUSED, Assembler::Register* a,
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Assembler::Register* b)
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{
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assert(c, size == 8);
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Assembler::Register ah(a->high);
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Assembler::Register bh(b->high);
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longCompare(c, a, &ah, b, &bh, CAST2(compareRR), CAST2(moveCR));
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}
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void
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populateTables()
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{
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@ -1933,6 +1953,8 @@ populateTables()
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BinaryOperations[INDEX2(LongCompare, Constant, Register)]
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= CAST2(longCompareCR);
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BinaryOperations[INDEX2(LongCompare, Register, Register)]
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= CAST2(longCompareRR);
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BinaryOperations[INDEX2(Compare, Constant, Register)] = CAST2(compareCR);
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BinaryOperations[INDEX2(Compare, Register, Constant)] = CAST2(compareRC);
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