X86: Implement the PUSHF, POPF, SAHF, and LAHF instructions.

--HG--
extra : convert_revision : 37c63b1133022fa3432888592f8c84785fb95091

1 files changed, 9 insertions, 8 deletions

diff --git a/src/arch/x86/isa/decoder/one_byte_opcodes.isa b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
index ac714b3ff..62b8c8d59 100644
--- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
@@ -313,17 +313,18 @@
                 default: WarnUnimpl::call_far_Ap();
             }
             0x3: WarnUnimpl::fwait(); //aka wait
-            0x4: WarnUnimpl::pushf_Fv();
-            0x5: WarnUnimpl::popf_Fv();
-            //Both of these should be illegal only if CPUID.AHF64=0,
-            //according to sandpile.org
+            0x4: PUSHF();
+            0x5: POPF();
+            //The 64 bit versions of both of these should be illegal only
+            //if CPUID says it isn't supported. For now, we'll just assume
+            //that it's supported.
             0x6: decode MODE_SUBMODE {
-                0x0: UD2();
-                default: WarnUnimpl::sahf();
+                0x0: SAHF_64();
+                default: SAHF();
             }
             0x7: decode MODE_SUBMODE {
-                0x0: UD2();
-                default: WarnUnimpl::lahf();
+                0x0: LAHF_64();
+                default: LAHF();
             }
         }
         0x14: decode OPCODE_OP_BOTTOM3 {