Erik Corry
1dec18e2cf
Apart from removing almost 1000 lines of very repetitive code, the idea here is to change the assembler from a huge pile of arbitrary code into something that can be used to generate tables of opcodes and their structure. Later, I'd like to use this to make the disassembler more table driven and less arbitrary, and perhaps build an x86 simulator in the same vein as the ARM simulator, which would help me debug (I find the ARM simulator very useful when making low level changes to the VM and miss its functionality on x86). R=vegorov@google.com Bug: Change-Id: I1ae2c1696f88b67862843c9ac05c827a7c9b9a6e Reviewed-on: https://dart-review.googlesource.com/25241 Commit-Queue: Erik Corry <erikcorry@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
133 lines
6.5 KiB
C++
133 lines
6.5 KiB
C++
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_CONSTANTS_X86_H_
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#define RUNTIME_VM_CONSTANTS_X86_H_
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namespace dart {
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enum Condition {
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OVERFLOW = 0,
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NO_OVERFLOW = 1,
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BELOW = 2,
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ABOVE_EQUAL = 3,
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EQUAL = 4,
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NOT_EQUAL = 5,
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BELOW_EQUAL = 6,
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ABOVE = 7,
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SIGN = 8,
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NOT_SIGN = 9,
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PARITY_EVEN = 10,
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PARITY_ODD = 11,
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LESS = 12,
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GREATER_EQUAL = 13,
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LESS_EQUAL = 14,
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GREATER = 15,
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ZERO = EQUAL,
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NOT_ZERO = NOT_EQUAL,
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NEGATIVE = SIGN,
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POSITIVE = NOT_SIGN,
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CARRY = BELOW,
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NOT_CARRY = ABOVE_EQUAL,
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// Platform-independent variants declared for all platforms
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// EQUAL,
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// NOT_EQUAL,
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// LESS,
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// LESS_EQUAL,
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// GREATER_EQUAL,
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// GREATER,
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UNSIGNED_LESS = BELOW,
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UNSIGNED_LESS_EQUAL = BELOW_EQUAL,
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UNSIGNED_GREATER = ABOVE,
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UNSIGNED_GREATER_EQUAL = ABOVE_EQUAL,
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INVALID_CONDITION = 16
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};
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#define X86_ZERO_OPERAND_1_BYTE_INSTRUCTIONS(F) \
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F(ret, 0xC3) \
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F(leave, 0xC9) \
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F(hlt, 0xF4) \
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F(cld, 0xFC) \
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F(int3, 0xCC) \
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F(pushad, 0x60) \
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F(popad, 0x61) \
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F(pushfd, 0x9C) \
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F(popfd, 0x9D) \
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F(sahf, 0x9E) \
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F(cdq, 0x99) \
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F(fwait, 0x9B) \
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F(movsb, 0xA4) \
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F(movsl, 0xA5) \
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F(cmpsb, 0xA6) \
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F(cmpsl, 0xA7)
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// clang-format off
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#define X86_ALU_CODES(F) \
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F(and, 4) \
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F(or, 1) \
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F(xor, 6) \
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F(add, 0) \
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F(adc, 2) \
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F(sub, 5) \
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F(sbb, 3) \
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F(cmp, 7)
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#define XMM_ALU_CODES(F) \
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F(bad0, 0) \
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F(sqrt, 1) \
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F(rsqrt, 2) \
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F(rcp, 3) \
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F(and, 4) \
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F(bad1, 5) \
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F(or, 6) \
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F(xor, 7) \
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F(add, 8) \
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F(mul, 9) \
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F(bad2, 0xA) \
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F(bad3, 0xB) \
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F(sub, 0xC) \
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F(min, 0xD) \
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F(div, 0xE) \
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F(max, 0xF)
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// clang-format on
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// Table 3-1, first part
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#define XMM_CONDITIONAL_CODES(F) \
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F(eq, 0) \
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F(lt, 1) \
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F(le, 2) \
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F(unord, 3) \
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F(neq, 4) \
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F(nlt, 5) \
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F(nle, 6) \
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F(ord, 7)
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#define X86_CONDITIONAL_SUFFIXES(F) \
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F(o, OVERFLOW) \
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F(no, NO_OVERFLOW) \
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F(c, CARRY) \
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F(nc, NOT_CARRY) \
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F(z, ZERO) \
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F(nz, NOT_ZERO) \
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F(na, BELOW_EQUAL) \
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F(a, ABOVE) \
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F(s, SIGN) \
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F(ns, NOT_SIGN) \
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F(pe, PARITY_EVEN) \
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F(po, PARITY_ODD) \
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F(l, LESS) \
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F(ge, GREATER_EQUAL) \
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F(le, LESS_EQUAL) \
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F(g, GREATER) \
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/* Some alternative names */ \
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F(e, EQUAL) \
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F(ne, NOT_EQUAL)
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} // namespace dart
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#endif // RUNTIME_VM_CONSTANTS_X86_H_
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