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GP-5402 aarch64 floating point comparisons and NAN

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James 2025-03-04 09:20:45 -05:00
parent 97c8b3975c
commit 1bcc69aece
2 changed files with 25 additions and 8 deletions
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12
Ghidra/Processors/AARCH64/data/languages/AARCH64instructions.sinc
View file

@ -3862,12 +3862,20 @@ macro fcomp(a, b)
OV = 0;
}
# this sets NG, ZR, CY, and OV to the values the processor
# uses to indicate an unordered comparison. If at least
# one of the inputs is NaN, it skips to the next instruction.
# A use of this macro should be followed by a use of the
# fcomp macro, which will set the flags according to an
# ordered comparison. Basically, set the flags to the "unordered"
# values, check for unordered, and if not set the flags again with
# fcomp.
macro ftestNAN(a, b)
{
NG = 0;
ZR = 0;
CY = 0;
OV = 0;
CY = 1;
OV = 1;
tst:1 = nan(a) || nan(b);
if (tst) goto inst_next;
}

21
Ghidra/Processors/AARCH64/data/languages/AARCH64neon.sinc
View file

@ -3625,9 +3625,10 @@ is b_31=0 & b_30=1 & b_2429=0b101110 & b_2223=0b11 & b_21=0 & b_1315=0b111 & b_1
:fccmp Rn_FPR64, Rm_FPR64, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & CondOp & b_1011=1 & Rn_FPR64 & fpccmp.op=0 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR64, Rm_FPR64);
fcomp(Rn_FPR64, Rm_FPR64);
}
@ -3640,9 +3641,10 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & CondOp &
:fccmp Rn_FPR32, Rm_FPR32, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & CondOp & b_1011=1 & Rn_FPR32 & fpccmp.op=0 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR32, Rm_FPR32);
fcomp(Rn_FPR32, Rm_FPR32);
}
@ -3655,9 +3657,10 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & CondOp &
:fccmp Rn_FPR16, Rm_FPR16, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_FPR16 & CondOp & b_1011=1 & Rn_FPR16 & fpccmp.op=0 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR16, Rm_FPR16);
fcomp(Rn_FPR16, Rm_FPR16);
}
@ -3670,8 +3673,8 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_FPR16 & CondOp &
:fccmpe Rn_FPR64, Rm_FPR64, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & CondOp & b_1011=1 & Rn_FPR64 & fpccmp.op=1 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR64, Rm_FPR64);
fcomp(Rn_FPR64, Rm_FPR64);
@ -3686,8 +3689,8 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & CondOp &
:fccmpe Rn_FPR32, Rm_FPR32, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & CondOp & b_1011=1 & Rn_FPR32 & fpccmp.op=1 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR32, Rm_FPR32);
fcomp(Rn_FPR32, Rm_FPR32);
@ -3702,8 +3705,8 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & CondOp &
:fccmpe Rn_FPR16, Rm_FPR16, NZCVImm_uimm4, CondOp
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_FPR16 & CondOp & b_1011=1 & Rn_FPR16 & fpccmp.op=1 & NZCVImm_uimm4
{
setCC_NZCV(NZCVImm_uimm4:1);
local tmp1:1 = ! CondOp:1;
setCC_NZCV(NZCVImm_uimm4:1);
if (tmp1) goto inst_next;
ftestNAN(Rn_FPR16, Rm_FPR16);
fcomp(Rn_FPR16, Rm_FPR16);
@ -4570,6 +4573,7 @@ is b_31=0 & b_30=1 & b_1029=0b00111011111000111010 & Rd_VPR128.8H & Rn_VPR128.8H
:fcmp Rn_FPR64, Rm_FPR64
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR64 & fpcmp.opcode2=0x0
{
ftestNAN(Rn_FPR64, Rm_FPR64);
fcomp(Rn_FPR64, Rm_FPR64);
}
@ -4582,6 +4586,7 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_FPR64 & fpcmp.op
:fcmp Rn_FPR64, Rm_fpz64
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_fpz64 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR64 & fpcmp.opcode2=0x8
{
ftestNAN(Rn_FPR64, Rm_fpz64);
fcomp(Rn_FPR64, Rm_fpz64);
}
@ -4594,6 +4599,7 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=1 & b_2121=1 & Rm_fpz64 & fpcmp.op
:fcmp Rn_FPR32, Rm_fpz32
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_fpz32 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR32 & fpcmp.opcode2=0x8
{
ftestNAN(Rn_FPR32, Rm_fpz32);
fcomp(Rn_FPR32, Rm_fpz32);
}
@ -4606,6 +4612,7 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_fpz32 & fpcmp.op
:fcmp Rn_FPR32, Rm_FPR32
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR32 & fpcmp.opcode2=0x0
{
ftestNAN(Rn_FPR32, Rm_FPR32);
fcomp(Rn_FPR32, Rm_FPR32);
}
@ -4618,6 +4625,7 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=0 & b_2121=1 & Rm_FPR32 & fpcmp.op
:fcmp Rn_FPR16, Rm_fpz16
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_fpz16 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR16 & fpcmp.opcode2=0x8
{
ftestNAN(Rn_FPR16, Rm_fpz16);
fcomp(Rn_FPR16, Rm_fpz16);
}
@ -4630,6 +4638,7 @@ is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_fpz16 & fpcmp.op
:fcmp Rn_FPR16, Rm_FPR16
is m=0 & b_3030=0 & s=0 & b_2428=0x1e & ftype=3 & b_2121=1 & Rm_FPR16 & fpcmp.op=0 & b_1013=0x8 & Rn_FPR16 & fpcmp.opcode2=0x0
{
ftestNAN(Rn_FPR16, Rm_FPR16);
fcomp(Rn_FPR16, Rm_FPR16);
}