diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-02-17 22:25:55 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-02-17 22:25:55 +0100 |
| commit | 8210f857f1a35ec285c972c2951e80ce8807f736 (patch) | |
| tree | 8ede7a4dd5fadc568f9c7f4d828f988a5a620d03 /sys/src/cmd/6l | |
| parent | eec5799f4c38c30786031f295a5ab833ab20ee6a (diff) | |
6l: no need to emit rex.w prefix for MOVBQZX and MOVWQZX
as with 32 bit operand size, the upper bits 63:32 are
automatically zeroed in 64bit mode. this gives a shoter
instruction encoding.
Diffstat (limited to 'sys/src/cmd/6l')
| -rw-r--r-- | sys/src/cmd/6l/optab.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/src/cmd/6l/optab.c b/sys/src/cmd/6l/optab.c index c4243b6ca..1a4b25762 100644 --- a/sys/src/cmd/6l/optab.c +++ b/sys/src/cmd/6l/optab.c @@ -751,7 +751,7 @@ Optab optab[] = { AMOVBLSX, ymb_rl, Pm, 0xbe }, { AMOVBLZX, ymb_rl, Pm, 0xb6 }, { AMOVBQSX, ymb_rl, Pw, 0x0f,0xbe }, - { AMOVBQZX, ymb_rl, Pw, 0x0f,0xb6 }, + { AMOVBQZX, ymb_rl, Py, 0x0f,0xb6 }, { AMOVBWSX, ymb_rl, Pq, 0xbe }, { AMOVBWZX, ymb_rl, Pq, 0xb6 }, { AMOVO, yxmov, Pe, 0x6f,0x7f }, @@ -786,7 +786,7 @@ Optab optab[] = { AMOVWLSX, yml_rl, Pm, 0xbf }, { AMOVWLZX, yml_rl, Pm, 0xb7 }, { AMOVWQSX, yml_rl, Pw, 0x0f,0xbf }, - { AMOVWQZX, yml_rl, Pw, 0x0f,0xb7 }, + { AMOVWQZX, yml_rl, Py, 0x0f,0xb7 }, { AMULB, ydivb, Pb, 0xf6,(04) }, { AMULL, ydivl, Px, 0xf7,(04) }, { AMULPD, yxm, Pe, 0x59 }, |