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backend/a64: implememnt CheckBit

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SachinVin 2019-07-17 14:16:07 +05:30 committed by xperia64
parent 263a7c823a
commit 08ada2919d
3 changed files with 15 additions and 2 deletions
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15
src/backend/A64/a32_emit_a64.cpp
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@ -551,6 +551,12 @@ void A32EmitA64::EmitA32SetZFlag(A32EmitContext& ctx, IR::Inst* inst) {
code.STR(INDEX_UNSIGNED, nzcv, X28, offsetof(A32JitState, CPSR_nzcv));
}
void A32EmitA64::EmitA32SetCheckBit(A32EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const ARM64Reg to_store = DecodeReg(ctx.reg_alloc.UseGpr(args[0]));
code.STRB(INDEX_UNSIGNED, to_store, X28, offsetof(A32JitState, check_bit));
}
void A32EmitA64::EmitA32GetCFlag(A32EmitContext& ctx, IR::Inst* inst) {
Arm64Gen::ARM64Reg result = DecodeReg(ctx.reg_alloc.ScratchGpr());
code.LDR(INDEX_UNSIGNED, result, X28, offsetof(A32JitState, CPSR_nzcv));
@ -1355,8 +1361,13 @@ void A32EmitA64::EmitTerminalImpl(IR::Term::If terminal, IR::LocationDescriptor
EmitTerminal(terminal.then_, initial_location);
}
void A32EmitA64::EmitTerminalImpl(IR::Term::CheckBit, IR::LocationDescriptor) {
ASSERT_MSG(false, "Term::CheckBit should never be emitted by the A32 frontend");
void A32EmitA64::EmitTerminalImpl(IR::Term::CheckBit terminal, IR::LocationDescriptor initial_location) {
FixupBranch fail;
code.LDRB(INDEX_UNSIGNED, DecodeReg(code.ABI_SCRATCH1), X28, offsetof(A32JitState, check_bit));
fail = code.CBZ(DecodeReg(code.ABI_SCRATCH1));
EmitTerminal(terminal.then_, initial_location);
code.SetJumpTarget(fail);
EmitTerminal(terminal.else_, initial_location);
}
void A32EmitA64::EmitTerminalImpl(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location) {

1
src/backend/A64/a32_jitstate.h
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@ -51,6 +51,7 @@ struct A32JitState {
s64 cycles_to_run = 0;
s64 cycles_remaining = 0;
bool halt_requested = false;
bool check_bit = false;
// Exclusive state
static constexpr u32 RESERVATION_GRANULE_MASK = 0xFFFFFFF8;

1
src/backend/A64/opcodes.inc
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@ -5,6 +5,7 @@ OPCODE(Identity, Opaque, Opaq
OPCODE(Breakpoint, Void, )
// A32 Context getters/setters
A32OPC(SetCheckBit, Void, U1 )
A32OPC(GetRegister, U32, A32Reg )
A32OPC(GetExtendedRegister32, U32, A32ExtReg )
A32OPC(GetExtendedRegister64, U64, A32ExtReg )