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[NDS32] Add clip* instructions

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This commit is contained in:
Timothée COCAULT 2020-04-18 17:50:29 +02:00
parent f1c61221a8
commit a6e497159c
1 changed files with 29 additions and 3 deletions
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32
Ghidra/Processors/NDS32/data/languages/nds32.sinc
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@ -643,9 +643,35 @@ GpWordAddress: [+ off] is Imm17s [ off = Imm17s << 2; ] { addr:4 = gp + off; exp
:btgl Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b001010 { Rt = Ra ^ (1 << Imm5u); }
:btst Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b001011 { Rt = (Ra >> Imm5u) & 1; }
# TODO : arithmetic functions: clip*
:clips Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b000100 unimpl
:clip Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b000101 unimpl
:clips Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b000100
{
local upper:4 = (1 << Imm5u) - 1;
local lower:4 = -(1 << Imm5u);
if(Ra s<= upper) goto <elif>;
Rt = upper;
goto <end>;
<elif>
if(Ra s>= lower) goto <else>;
Rt = lower;
goto <end>;
<else>
Rt = Ra;
<end>
}
:clip Rt, Ra, Imm5u is $(I32) & $(ALU_2) & Rt & Ra & Imm5u & $(ALU2Z) & Sub6=0b000101
{
local upper:4 = (1 << Imm5u) - 1;
if(Ra <= upper) goto <elif>;
Rt = upper;
goto <end>;
<elif>
if(Ra >= 0) goto <else>;
Rt = 0;
goto <end>;
<else>
Rt = Ra;
<end>
}
:clz Rt, Ra is $(I32) & $(ALU_2) & Rt & Ra & Imm5u=0 & $(ALU2Z) & Sub6=0b000111
{