96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
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//===-- AArch64SMEAttributes.cpp - Helper for interpreting SME attributes -===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "AArch64SMEAttributes.h"
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#include "llvm/IR/InstrTypes.h"
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#include <cassert>
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using namespace llvm;
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void SMEAttrs::set(unsigned M, bool Enable) {
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if (Enable)
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Bitmask |= M;
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else
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Bitmask &= ~M;
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// Streaming Mode Attrs
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assert(!(hasStreamingInterface() && hasStreamingCompatibleInterface()) &&
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"SM_Enabled and SM_Compatible are mutually exclusive");
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// ZA Attrs
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assert(!(hasNewZABody() && sharesZA()) &&
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"ZA_New and ZA_Shared are mutually exclusive");
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assert(!(hasNewZABody() && preservesZA()) &&
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"ZA_New and ZA_Preserved are mutually exclusive");
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assert(!(hasNewZABody() && (Bitmask & SME_ABI_Routine)) &&
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"ZA_New and SME_ABI_Routine are mutually exclusive");
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// ZT0 Attrs
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assert(
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(!sharesZT0() || (isNewZT0() ^ isInZT0() ^ isInOutZT0() ^ isOutZT0() ^
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isPreservesZT0())) &&
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"Attributes 'aarch64_new_zt0', 'aarch64_in_zt0', 'aarch64_out_zt0', "
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"'aarch64_inout_zt0' and 'aarch64_preserves_zt0' are mutually exclusive");
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}
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SMEAttrs::SMEAttrs(const CallBase &CB) {
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*this = SMEAttrs(CB.getAttributes());
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if (auto *F = CB.getCalledFunction()) {
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set(SMEAttrs(*F).Bitmask | SMEAttrs(F->getName()).Bitmask);
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}
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}
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SMEAttrs::SMEAttrs(StringRef FuncName) : Bitmask(0) {
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if (FuncName == "__arm_tpidr2_save" || FuncName == "__arm_sme_state")
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Bitmask |= (SMEAttrs::SM_Compatible | SMEAttrs::SME_ABI_Routine);
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if (FuncName == "__arm_tpidr2_restore")
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Bitmask |= (SMEAttrs::SM_Compatible | SMEAttrs::ZA_Shared |
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SMEAttrs::SME_ABI_Routine);
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}
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SMEAttrs::SMEAttrs(const AttributeList &Attrs) {
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Bitmask = 0;
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if (Attrs.hasFnAttr("aarch64_pstate_sm_enabled"))
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Bitmask |= SM_Enabled;
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if (Attrs.hasFnAttr("aarch64_pstate_sm_compatible"))
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Bitmask |= SM_Compatible;
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if (Attrs.hasFnAttr("aarch64_pstate_sm_body"))
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Bitmask |= SM_Body;
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if (Attrs.hasFnAttr("aarch64_pstate_za_shared"))
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Bitmask |= ZA_Shared;
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if (Attrs.hasFnAttr("aarch64_pstate_za_new"))
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Bitmask |= ZA_New;
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if (Attrs.hasFnAttr("aarch64_pstate_za_preserved"))
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Bitmask |= ZA_Preserved;
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if (Attrs.hasFnAttr("aarch64_in_zt0"))
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Bitmask |= encodeZT0State(StateValue::In);
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if (Attrs.hasFnAttr("aarch64_out_zt0"))
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Bitmask |= encodeZT0State(StateValue::Out);
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if (Attrs.hasFnAttr("aarch64_inout_zt0"))
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Bitmask |= encodeZT0State(StateValue::InOut);
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if (Attrs.hasFnAttr("aarch64_preserves_zt0"))
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Bitmask |= encodeZT0State(StateValue::Preserved);
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if (Attrs.hasFnAttr("aarch64_new_zt0"))
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Bitmask |= encodeZT0State(StateValue::New);
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}
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bool SMEAttrs::requiresSMChange(const SMEAttrs &Callee) const {
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if (Callee.hasStreamingCompatibleInterface())
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return false;
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// Both non-streaming
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if (hasNonStreamingInterfaceAndBody() && Callee.hasNonStreamingInterface())
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return false;
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// Both streaming
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if (hasStreamingInterfaceOrBody() && Callee.hasStreamingInterface())
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return false;
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return true;
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}
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