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target/alpha: fix icount handling for timer instructions 

This patch handles icount mode for timer read/write instructions,
because it is required to call gen_io_start in such cases.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <161700373035.1135822.16451510827008616793.stgit@pasha-ThinkPad-X280>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Pavel Dovgalyuk 2021-03-29 10:42:10 +03:00 committed by Richard Henderson
parent 4e655e3cd8
commit ef951ee33f
1 changed files with 7 additions and 2 deletions
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9
target/alpha/translate.c
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@ -1330,7 +1330,7 @@ static DisasJumpType gen_mfpr(DisasContext *ctx, TCGv va, int regno)
case 249: /* VMTIME */
helper = gen_helper_get_vmtime;
do_helper:
if (icount_enabled()) {
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
helper(va);
return DISAS_PC_STALE;
@ -1366,6 +1366,7 @@ static DisasJumpType gen_mfpr(DisasContext *ctx, TCGv va, int regno)
static DisasJumpType gen_mtpr(DisasContext *ctx, TCGv vb, int regno)
{
int data;
DisasJumpType ret = DISAS_NEXT;
switch (regno) {
case 255:
@ -1395,6 +1396,10 @@ static DisasJumpType gen_mtpr(DisasContext *ctx, TCGv vb, int regno)
case 251:
/* ALARM */
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
ret = DISAS_PC_STALE;
}
gen_helper_set_alarm(cpu_env, vb);
break;
@ -1434,7 +1439,7 @@ static DisasJumpType gen_mtpr(DisasContext *ctx, TCGv vb, int regno)
break;
}
return DISAS_NEXT;
return ret;
}
#endif /* !USER_ONLY*/