diff options
Diffstat (limited to 'src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py')
-rw-r--r-- | src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py b/src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py index 138082eb2..caaeca974 100644 --- a/src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py +++ b/src/arch/x86/isa/insts/general_purpose/rotate_and_shift/shift.py @@ -174,6 +174,41 @@ def macroop SHR_P_R st t1, seg, riprel, disp }; +# SHRD will not set OF correctly when the shift count is 1. +def macroop SHRD_R_R_I +{ + srli t1, reg, imm, flags=(CF,) + rori t2, regm, imm + srli t3, regm, imm + xor t2, t2, t3 + or reg, t1, t2 +}; + +# SHRD will not set OF correctly when the shift count is 1. +def macroop SHRD_M_R_I +{ + ldst t1, seg, sib, disp + srli t1, t1, imm, flags=(CF,) + rori t2, reg, imm + srli t3, reg, imm + xor t2, t2, t3 + or t1, t1, t2 + st t1, seg, sib, disp +}; + +# SHRD will not set OF correctly when the shift count is 1. +def macroop SHRD_P_R_I +{ + rdip t7 + ldst t1, seg, riprel, disp + srli t1, t1, imm, flags=(CF,) + rori t2, reg, imm + srli t3, reg, imm + xor t2, t2, t3 + or t1, t1, t2 + st t1, seg, riprel, disp +}; + def macroop SAR_R_I { srai reg, reg, imm, flags=(CF,OF,SF,ZF,PF) |