1 files changed, 97 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..5069d8ac98
--- /dev/null
+++ b/js/src/jit/x86-shared/Architecture-x86-shared.cpp
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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 "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()) < mozilla::ArrayLength(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.
+    if (!JitSupportsSimd())
+        bits &= Codes::AllPhysMask * Codes::SpreadScalar;
+
+    // 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);
+}