diff options
| author | Richard Henderson <rth@twiddle.net> | 2010-01-14 14:59:51 -0800 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2010-01-15 07:32:56 +0100 |
| commit | 09aac1266e8acd02f1beb7adc91286716d7162bd (patch) | |
| tree | a2b52e694ff69cd882913ba80cc20ee5331a4ccf /target-sparc | |
| parent | fccd2613d6225f3cb10e861eb64fd7ce3f55eb8b (diff) | |
tcg/x86_64: Avoid unnecessary REX.B prefixes.
The existing P_REXB internal opcode flag unconditionally emits
the REX prefix. Technically it's not needed if the register in
question is %al, %bl, %cl, %dl.
Eliding the prefix requires splitting the P_REXB flag into two,
in order to indicate whether the byte register in question is
in the REG or the R/M field. Within TCG, the byte register is
in the REG field only for stores.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-sparc')
0 files changed, 0 insertions, 0 deletions