diff options
Diffstat (limited to 'deps/v8/src/codegen/x64/register-x64.h')
| -rw-r--r-- | deps/v8/src/codegen/x64/register-x64.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/deps/v8/src/codegen/x64/register-x64.h b/deps/v8/src/codegen/x64/register-x64.h index 4ab85275cc..6adf816dd3 100644 --- a/deps/v8/src/codegen/x64/register-x64.h +++ b/deps/v8/src/codegen/x64/register-x64.h @@ -41,7 +41,7 @@ namespace internal { V(r12) \ V(r15) -#ifdef V8_COMPRESS_POINTERS_IN_SHARED_CAGE +#ifdef V8_COMPRESS_POINTERS #define MAYBE_ALLOCATABLE_GENERAL_REGISTERS(V) #else #define MAYBE_ALLOCATABLE_GENERAL_REGISTERS(V) V(r14) @@ -102,12 +102,20 @@ constexpr Register arg_reg_1 = rcx; constexpr Register arg_reg_2 = rdx; constexpr Register arg_reg_3 = r8; constexpr Register arg_reg_4 = r9; +constexpr int kRegisterPassedArguments = 4; +// The Windows 64 ABI always reserves spill slots on the stack for the four +// register arguments even if the function takes fewer than four arguments. +// These stack slots are sometimes called 'home space', sometimes 'shadow +// store' in Microsoft documentation, see +// https://learn.microsoft.com/en-us/cpp/build/x64-calling-convention. +constexpr int kWindowsHomeStackSlots = 4; #else // AMD64 calling convention constexpr Register arg_reg_1 = rdi; constexpr Register arg_reg_2 = rsi; constexpr Register arg_reg_3 = rdx; constexpr Register arg_reg_4 = rcx; +constexpr int kRegisterPassedArguments = 6; #endif // V8_TARGET_OS_WIN #define DOUBLE_REGISTERS(V) \ @@ -279,15 +287,14 @@ constexpr Register kWasmInstanceRegister = rsi; // function calling convention. constexpr Register kScratchRegister = r10; constexpr XMMRegister kScratchDoubleReg = xmm15; +constexpr YMMRegister kScratchSimd256Reg = ymm15; constexpr Register kRootRegister = r13; // callee save -#ifdef V8_COMPRESS_POINTERS_IN_SHARED_CAGE +#ifdef V8_COMPRESS_POINTERS constexpr Register kPtrComprCageBaseRegister = r14; // callee save #else -constexpr Register kPtrComprCageBaseRegister = kRootRegister; +constexpr Register kPtrComprCageBaseRegister = no_reg; #endif -constexpr Register kOffHeapTrampolineRegister = kScratchRegister; - constexpr DoubleRegister kFPReturnRegister0 = xmm0; } // namespace internal |