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PowerPC: Add SPE floating point min/max instructions (efsmax, efsmin) #8828

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PowerPC: Add SPE floating point min/max instructions (efsmax, efsmin) #8828

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PowerPC: Add SPE floating point min/max instructions (efsmax, efsmin)
daskey Dec 25, 2025
8b3e025
Refactor efsmax and efsmin for clarity and efficiency
daskey Dec 30, 2025
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31 changes: 31 additions & 0 deletions Ghidra/Processors/PowerPC/data/languages/Scalar_SPFP.sinc
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Original file line number Diff line number Diff line change
Expand Up @@ -467,3 +467,34 @@ define pcodeop ConvertFloatingPointFromUnsignedFraction;
{
CRFD[2,1] = A:4 f< B:4;
}

# =================================================================
# SPE Floating Point Single-Precision Min/Max

# efsmax rT,rA,rB 010 1011 0000
#define pcodeop FloatingPointMaximum;
:efsmax D,A,B is OP=4 & D & A & B & XOP_0_10=0x2B0
{
local inA:4 = A:4;
local inB:4 = B:4;
local cond:1 = inA f>= inB;
local result:4 = (zext(cond) * inA) + (zext(!cond) * inB);
# assign to lower word of D
D = ( D & 0xFFFFFFFF00000000 ) | zext( result );
setFPRF( result );
setSummaryFPSCR();
}

# efsmin rT,rA,rB 010 1011 0001
#define pcodeop FloatingPointMinimum;
:efsmin D,A,B is OP=4 & D & A & B & XOP_0_10=0x2B1
{
local inA:4 = A:4;
local inB:4 = B:4;
local cond:1 = inA f<= inB;
local result:4 = (zext(cond) * inA) + (zext(!cond) * inB);
# assign to lower word of D
D = ( D & 0xFFFFFFFF00000000 ) | zext( result );
setFPRF( result );
setSummaryFPSCR();
}