flat assembler
Message board for the users of flat assembler.
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baldr
Helle,
Doesn't it already? In 64-bit mode fxsave compiles with 67 prefix just fine. |
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Madis731
...and MenuetOS (64-bit) has been using it successfully for years.
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Helle
Prefix 67h ? I see no effect... I use prefix 48h (REX.W) for e.g. "fxsave [rax]" (opcode "48 0f ae 00"). But REX.W + fxsave is fxsave64 (Intel). I use this in a fpu-monitor, with this I get in [rax+8] the large address of the last fpu-instruction. Without REX.W I get only a 32-bit-address (or nonsens) !
Greetings Helle |
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