1 files changed, 93 insertions, 0 deletions
diff --git a/js/src/jit/x86-shared/Architecture-x86-shared.cpp b/js/src/jit/x86-shared/Architecture-x86-shared.cpp
new file mode 100644
index 0000000000..f000b09c77
--- /dev/null
+++ b/js/src/jit/x86-shared/Architecture-x86-shared.cpp
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jit/x86-shared/Architecture-x86-shared.h"
+#if !defined(JS_CODEGEN_X86) && !defined(JS_CODEGEN_X64)
+#  error "Wrong architecture. Only x86 and x64 should build this file!"
+#endif
+
+#include <iterator>
+
+#include "jit/RegisterSets.h"
+
+const char* js::jit::FloatRegister::name() const {
+  static const char* const names[] = {
+
+#ifdef JS_CODEGEN_X64
+#  define FLOAT_REGS_(TYPE)                                                   \
+    "%xmm0" TYPE, "%xmm1" TYPE, "%xmm2" TYPE, "%xmm3" TYPE, "%xmm4" TYPE,     \
+        "%xmm5" TYPE, "%xmm6" TYPE, "%xmm7" TYPE, "%xmm8" TYPE, "%xmm9" TYPE, \
+        "%xmm10" TYPE, "%xmm11" TYPE, "%xmm12" TYPE, "%xmm13" TYPE,           \
+        "%xmm14" TYPE, "%xmm15" TYPE
+#else
+#  define FLOAT_REGS_(TYPE)                                               \
+    "%xmm0" TYPE, "%xmm1" TYPE, "%xmm2" TYPE, "%xmm3" TYPE, "%xmm4" TYPE, \
+        "%xmm5" TYPE, "%xmm6" TYPE, "%xmm7" TYPE
+#endif
+
+      // These should be enumerated in the same order as in
+      // FloatRegisters::ContentType.
+      FLOAT_REGS_(".s"), FLOAT_REGS_(".d"), FLOAT_REGS_(".i4"),
+      FLOAT_REGS_(".s4")
+#undef FLOAT_REGS_
+
+  };
+  MOZ_ASSERT(size_t(code()) < std::size(names));
+  return names[size_t(code())];
+}
+
+js::jit::FloatRegisterSet js::jit::FloatRegister::ReduceSetForPush(
+    const FloatRegisterSet& s) {
+  SetType bits = s.bits();
+
+  // Ignore all SIMD register, if not supported.
+#ifndef ENABLE_WASM_SIMD
+  bits &= Codes::AllPhysMask * Codes::SpreadScalar;
+#endif
+
+  // Exclude registers which are already pushed with a larger type. High bits
+  // are associated with larger register types. Thus we keep the set of
+  // registers which are not included in larger type.
+  bits &= ~(bits >> (1 * Codes::TotalPhys));
+  bits &= ~(bits >> (2 * Codes::TotalPhys));
+  bits &= ~(bits >> (3 * Codes::TotalPhys));
+
+  return FloatRegisterSet(bits);
+}
+
+uint32_t js::jit::FloatRegister::GetPushSizeInBytes(const FloatRegisterSet& s) {
+  SetType all = s.bits();
+  SetType set128b = (all >> (uint32_t(Codes::Simd128) * Codes::TotalPhys)) &
+                    Codes::AllPhysMask;
+  SetType doubleSet = (all >> (uint32_t(Codes::Double) * Codes::TotalPhys)) &
+                      Codes::AllPhysMask;
+  SetType singleSet = (all >> (uint32_t(Codes::Single) * Codes::TotalPhys)) &
+                      Codes::AllPhysMask;
+
+  // PushRegsInMask pushes the largest register first, and thus avoids pushing
+  // aliased registers. So we have to filter out the physical registers which
+  // are already pushed as part of larger registers.
+  SetType set64b = doubleSet & ~set128b;
+  SetType set32b = singleSet & ~set64b & ~set128b;
+
+  static_assert(Codes::AllPhysMask <= 0xffff,
+                "We can safely use CountPopulation32");
+  uint32_t count32b = mozilla::CountPopulation32(set32b);
+
+#if defined(JS_CODEGEN_X64)
+  // If we have an odd number of 32 bits values, then we increase the size to
+  // keep the stack aligned on 8 bytes. Note: Keep in sync with
+  // PushRegsInMask, and PopRegsInMaskIgnore.
+  count32b += count32b & 1;
+#endif
+
+  return mozilla::CountPopulation32(set128b) * (4 * sizeof(int32_t)) +
+         mozilla::CountPopulation32(set64b) * sizeof(double) +
+         count32b * sizeof(float);
+}
+uint32_t js::jit::FloatRegister::getRegisterDumpOffsetInBytes() {
+  return uint32_t(encoding()) * sizeof(FloatRegisters::RegisterContent);
+}