From ae11aed9d7b380ad3af49eefe7e0c0161dd294a6 Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Tue, 14 Jan 2014 07:41:20 +0000 Subject: Separate the concept of 16-bit/32-bit operand size controlled by 0x66 prefix and the current mode from the concept of SSE instructions using 0x66 prefix as part of their encoding without being affected by the mode. This should allow SSE instructions to be encoded correctly in 16-bit mode which r198586 probably broke. llvm-svn: 199193 --- llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp') diff --git a/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp b/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp index 48bd6f19351..bd3c00626d6 100644 --- a/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp +++ b/llvm/lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp @@ -717,6 +717,10 @@ void X86MCCodeEmitter::EmitVEXOpcodePrefix(uint64_t TSFlags, unsigned &CurByte, case X86II::TA: // 0F 3A VEX_5M = 0x3; break; + case X86II::T8PD: // 66 0F 38 + VEX_PP = 0x1; + VEX_5M = 0x2; + break; case X86II::T8XS: // F3 0F 38 VEX_PP = 0x2; VEX_5M = 0x2; @@ -725,10 +729,17 @@ void X86MCCodeEmitter::EmitVEXOpcodePrefix(uint64_t TSFlags, unsigned &CurByte, VEX_PP = 0x3; VEX_5M = 0x2; break; + case X86II::TAPD: // 66 0F 3A + VEX_PP = 0x1; + VEX_5M = 0x3; + break; case X86II::TAXD: // F2 0F 3A VEX_PP = 0x3; VEX_5M = 0x3; break; + case X86II::PD: // 66 0F + VEX_PP = 0x1; + break; case X86II::XS: // F3 0F VEX_PP = 0x2; break; @@ -1215,6 +1226,12 @@ void X86MCCodeEmitter::EmitOpcodePrefix(uint64_t TSFlags, unsigned &CurByte, case X86II::A7: // 0F A7 Need0FPrefix = true; break; + case X86II::PD: // 66 0F + case X86II::T8PD: // 66 0F 38 + case X86II::TAPD: // 66 0F 3A + EmitByte(0x66, CurByte, OS); + Need0FPrefix = true; + break; case X86II::XS: // F3 0F case X86II::T8XS: // F3 0F 38 EmitByte(0xF3, CurByte, OS); @@ -1252,11 +1269,13 @@ void X86MCCodeEmitter::EmitOpcodePrefix(uint64_t TSFlags, unsigned &CurByte, // FIXME: Pull this up into previous switch if REX can be moved earlier. switch (TSFlags & X86II::Op0Mask) { + case X86II::T8PD: // 66 0F 38 case X86II::T8XS: // F3 0F 38 case X86II::T8XD: // F2 0F 38 case X86II::T8: // 0F 38 EmitByte(0x38, CurByte, OS); break; + case X86II::TAPD: // 66 0F 3A case X86II::TAXD: // F2 0F 3A case X86II::TA: // 0F 3A EmitByte(0x3A, CurByte, OS); -- cgit v1.2.3