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target/sparc: Implement MWAIT

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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-11-04 22:12:24 -07:00
parent 56f2ef9c79
commit 6fbc032cbc
2 changed files with 12 additions and 0 deletions
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1
target/sparc/insns.decode
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@ -124,6 +124,7 @@ CALL 01 i:s30
WRTICK_CMPR 10 10111 110000 ..... . ............. @n_r_ri WRTICK_CMPR 10 10111 110000 ..... . ............. @n_r_ri
WRSTICK 10 11000 110000 ..... . ............. @n_r_ri WRSTICK 10 11000 110000 ..... . ............. @n_r_ri
WRSTICK_CMPR 10 11001 110000 ..... . ............. @n_r_ri WRSTICK_CMPR 10 11001 110000 ..... . ............. @n_r_ri
WRMWAIT 10 11100 110000 ..... . ............. @n_r_ri
] ]
# Before v8, rs1==0 was WRY, and the rest executed as nop. # Before v8, rs1==0 was WRY, and the rest executed as nop.
[ [

11
target/sparc/translate.c
View file

@ -3344,6 +3344,17 @@ static void do_wrpowerdown(DisasContext *dc, TCGv src)
TRANS(WRPOWERDOWN, POWERDOWN, do_wr_special, a, supervisor(dc), do_wrpowerdown) TRANS(WRPOWERDOWN, POWERDOWN, do_wr_special, a, supervisor(dc), do_wrpowerdown)
static void do_wrmwait(DisasContext *dc, TCGv src)
{
/*
* TODO: This is a stub version of mwait, which merely recognizes
* interrupts immediately and does not wait.
*/
dc->base.is_jmp = DISAS_EXIT;
}
TRANS(WRMWAIT, VIS4, do_wr_special, a, true, do_wrmwait)
static void do_wrpsr(DisasContext *dc, TCGv src) static void do_wrpsr(DisasContext *dc, TCGv src)
{ {
gen_helper_wrpsr(tcg_env, src); gen_helper_wrpsr(tcg_env, src);