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| author | Gabe Black <gblack@eecs.umich.edu> | 2007-10-18 22:38:17 -0700 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2007-10-18 22:38:17 -0700 |
| commit | 2bbc058c6c5e54c032106f804dd3084ed11f0f09 (patch) | |
| tree | 84d17c04577ef75098eafbe2f78631235dfafb36 | |
| parent | 418b30602bd08646d6f260d495163ad4fb613402 (diff) | |
| download | gem5-2bbc058c6c5e54c032106f804dd3084ed11f0f09.tar.xz | |
X86: Implement the LOOP instructions.
--HG--
extra : convert_revision : 3ccd0565c83b6d9c9b63f9f7ac2b67839a2c714f
| -rw-r--r-- | src/arch/x86/isa/decoder/one_byte_opcodes.isa | 6 | ||||
| -rw-r--r-- | src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py | 24 |
2 files changed, 22 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 b1fdce0a7..6e7fdea35 100644 --- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa +++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa @@ -472,9 +472,9 @@ } ##include "x87.isa" 0x1C: decode OPCODE_OP_BOTTOM3 { - 0x0: loopne_Jb(); - 0x1: loope_Jb(); - 0x2: loop_Jb(); + 0x0: Inst::LOOPNE(Jb); + 0x1: Inst::LOOPE(Jb); + 0x2: Inst::LOOP(Jb); 0x3: Inst::JRCX(Jb); 0x4: in_Al_Ib(); 0x5: in_eAX_Ib(); diff --git a/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py b/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py index d742f217f..c5674db7f 100644 --- a/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py +++ b/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py @@ -53,8 +53,22 @@ # # Authors: Gabe Black -microcode = "" -#let {{ -# class LOOPcc(Inst): -# "GenFault ${new UnimpInstFault}" -#}}; +microcode = ''' +def macroop LOOP_I { + rdip t1 + subi rcx, rcx, 1, flags=(EZF,), dataSize=asz + wripi t1, imm, flags=(nCEZF,) +}; + +def macroop LOOPNE_I { + rdip t1 + subi rcx, rcx, 1, flags=(EZF,), dataSize=asz + wripi t1, imm, flags=(CSTRnZnEZF,) +}; + +def macroop LOOPE_I { + rdip t1 + subi rcx, rcx, 1, flags=(EZF,), dataSize=asz + wripi t1, imm, flags=(CSTRZnEZF,) +}; +''' |