From d6134babc0f92ce2e026888eb0a2fce9949c348f Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Tue, 22 Sep 2020 10:03:30 +1000 Subject: [PATCH] decode1: Implement obsolete dst, dstst, dss instructions as no-ops Signed-off-by: Paul Mackerras --- decode1.vhdl | 3 +++ 1 file changed, 3 insertions(+) diff --git a/decode1.vhdl b/decode1.vhdl index e9d38e8..e320a28 100644 --- a/decode1.vhdl +++ b/decode1.vhdl @@ -235,6 +235,9 @@ architecture behaviour of decode1 is 2#1111101001# => (ALU, NONE, OP_DIV, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '1', RC, '0', '0', NONE), -- divdo 2#0111101011# => (ALU, NONE, OP_DIV, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '1', RC, '0', '0', NONE), -- divw 2#1111101011# => (ALU, NONE, OP_DIV, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '1', RC, '0', '0', NONE), -- divwo + 2#1100110110# => (ALU, NONE, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- dss + 2#0101010110# => (ALU, NONE, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- dst + 2#0101110110# => (ALU, NONE, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- dstst 2#1101010110# => (ALU, NONE, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1', NONE), -- eieio 2#0100011100# => (ALU, NONE, OP_XOR, NONE, RB, RS, RA, '0', '0', '0', '1', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- eqv 2#1110111010# => (ALU, NONE, OP_EXTS, NONE, NONE, RS, RA, '0', '0', '0', '0', ZERO, '0', is1B, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- extsb