Add a decode for the nop instruction

We want these to go out without any GPR dependencies, so add
a specific entry in decode for them.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
jtag-port
Anton Blanchard 5 years ago committed by Anton Blanchard
parent 85062793b1
commit 9867fb6149

@ -157,6 +157,7 @@ architecture behaviour of decode1 is
PPC_MULLW => (MUL, OP_MUL_L64, RA, RB, NONE, RT, NONE, NONE, NONE, '0', '1', '0', '0', NONE, '0', '0', '0', '0', '1', '1', RC, '0', '1'),
PPC_NAND => (ALU, OP_NAND, RS, RB, NONE, RA, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '1'),
PPC_NEG => (ALU, OP_NEG, RA, RB, NONE, RT, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '1'),
PPC_NOP => (ALU, OP_NOP, NONE, NONE, NONE, NONE, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1'),
PPC_NOR => (ALU, OP_NOR, RS, RB, NONE, RA, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '1'),
PPC_OR => (ALU, OP_OR, RS, RB, NONE, RA, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '1'),
PPC_ORC => (ALU, OP_ORC, RS, RB, NONE, RA, NONE, NONE, NONE, '0', '0', '0', '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '1'),
@ -644,6 +645,10 @@ begin
elsif std_match(f_in.insn, "011111---------------0110011100-") then
report "PPC_orc";
ppc_insn := PPC_ORC;
-- Has to be before ori
elsif std_match(f_in.insn, "01100000000000000000000000000000") then
report "PPC_nop";
ppc_insn := PPC_NOP;
elsif std_match(f_in.insn, "011000--------------------------") then
report "PPC_ori";
ppc_insn := PPC_ORI;

@ -25,7 +25,7 @@ package decode_types is
PPC_MODSD, PPC_MODSW, PPC_MODUD, PPC_MODUW, PPC_MTCRF,
PPC_MFCTR, PPC_MTCTR, PPC_MFLR, PPC_MTLR, PPC_MTOCRF,
PPC_MTSPR, PPC_MULHD, PPC_MULHDU, PPC_MULHW, PPC_MULHWU,
PPC_MULLD, PPC_MULLI, PPC_MULLW, PPC_NAND, PPC_NEG, PPC_NOR,
PPC_MULLD, PPC_MULLI, PPC_MULLW, PPC_NAND, PPC_NEG, PPC_NOR, PPC_NOP,
PPC_OR, PPC_ORC, PPC_ORI, PPC_ORIS, PPC_POPCNTB, PPC_POPCNTD,
PPC_POPCNTW, PPC_PRTYD, PPC_PRTYW, PPC_RLDCL, PPC_RLDCR,
PPC_RLDIC, PPC_RLDICL, PPC_RLDICR, PPC_RLDIMI, PPC_RLWIMI,

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