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[NDS32] Add pbsad* instructions

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This commit is contained in:
Timothée COCAULT 2020-04-18 17:44:22 +02:00
parent f23433dd60
commit f1c61221a8
1 changed files with 27 additions and 3 deletions
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30
Ghidra/Processors/NDS32/data/languages/nds32.sinc
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@ -690,9 +690,33 @@ GpWordAddress: [+ off] is Imm17s [ off = Imm17s << 2; ] { addr:4 = gp + off; exp
:bse is $(I32) & $(ALU_2) & Rt & Ra & Rb & $(ALU2Z) & Sub6=0b001100 unimpl
:bsp is $(I32) & $(ALU_2) & Rt & Ra & Rb & $(ALU2Z) & Sub6=0b001101 unimpl
# TODO : arithmetic functions: pbs*
:pbsad Rt, Ra, Rb is $(I32) & $(SIMD) & Rt & Ra & Rb & Rd=0 & Sub5=0b0000 unimpl
:pbsada Rt, Ra, Rb is $(I32) & $(SIMD) & Rt & Ra & Rb & Rd=0 & Sub5=0b0001 unimpl
macro add_abs_diff(dst, src1, src2, shift)
{
local src1_ = src1 >> shift;
local src2_ = src2 >> shift;
local src1__ = src1_:1;
local src2__ = src2_:1;
local a:1 = src1__ - src2__;
local agez:1 = zext(a s>= 0);
local altz:1 = zext(a s< 0);
local aabs:1 = (a * agez) | ((-a) * altz);
dst = dst + zext(aabs);
}
:pbsad Rt, Ra, Rb is $(I32) & $(SIMD) & Rt & Ra & Rb & Rd=0 & Sub5=0b0000
{
Rt = 0;
add_abs_diff(Rt, Ra, Rb, 0);
add_abs_diff(Rt, Ra, Rb, 8);
add_abs_diff(Rt, Ra, Rb, 16);
add_abs_diff(Rt, Ra, Rb, 24);
}
:pbsada Rt, Ra, Rb is $(I32) & $(SIMD) & Rt & Ra & Rb & Rd=0 & Sub5=0b0001
{
add_abs_diff(Rt, Ra, Rb, 0);
add_abs_diff(Rt, Ra, Rb, 8);
add_abs_diff(Rt, Ra, Rb, 16);
add_abs_diff(Rt, Ra, Rb, 24);
}
@endif