diff options
| author | David Hildenbrand <david@redhat.com> | 2017-12-08 17:02:05 +0100 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-12-14 17:56:54 +0100 |
| commit | 4bac52f5c4b3dd5d0bd7568377ad7e957d5e3c6a (patch) | |
| tree | fef4787eeee9ef5222fcf5ab1b271f3e84c3b7bc /target/s390x/translate.c | |
| parent | ad0ccf1e6a45c22d6c0564f8365bf1df39c64c15 (diff) | |
s390x/tcg: implement extract-CPU-time facility
It only provides the EXTRACT CPU TIME instruction. We can reuse the stpt
helper, which calculates the CPU timer value.
As the instruction is not privileged, but we don't have a CPU timer
value in case of linux user, we simply reuse cpu_get_host_ticks() to
produce some descending value.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171208160207.26494-13-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x/translate.c')
| -rw-r--r-- | target/s390x/translate.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/s390x/translate.c b/target/s390x/translate.c index 83e1df0f48..eede2ed157 100644 --- a/target/s390x/translate.c +++ b/target/s390x/translate.c @@ -3917,6 +3917,36 @@ static ExitStatus op_spm(DisasContext *s, DisasOps *o) return NO_EXIT; } +static ExitStatus op_ectg(DisasContext *s, DisasOps *o) +{ + int b1 = get_field(s->fields, b1); + int d1 = get_field(s->fields, d1); + int b2 = get_field(s->fields, b2); + int d2 = get_field(s->fields, d2); + int r3 = get_field(s->fields, r3); + TCGv_i64 tmp = tcg_temp_new_i64(); + + /* fetch all operands first */ + o->in1 = tcg_temp_new_i64(); + tcg_gen_addi_i64(o->in1, regs[b1], d1); + o->in2 = tcg_temp_new_i64(); + tcg_gen_addi_i64(o->in2, regs[b2], d2); + o->addr1 = get_address(s, 0, r3, 0); + + /* load the third operand into r3 before modifying anything */ + tcg_gen_qemu_ld64(regs[r3], o->addr1, get_mem_index(s)); + + /* subtract CPU timer from first operand and store in GR0 */ + gen_helper_stpt(tmp, cpu_env); + tcg_gen_sub_i64(regs[0], o->in1, tmp); + + /* store second operand in GR1 */ + tcg_gen_mov_i64(regs[1], o->in2); + + tcg_temp_free_i64(tmp); + return NO_EXIT; +} + #ifndef CONFIG_USER_ONLY static ExitStatus op_spka(DisasContext *s, DisasOps *o) { @@ -5679,6 +5709,7 @@ enum DisasInsnEnum { #define FAC_MSA3 S390_FEAT_MSA_EXT_3 /* msa-extension-3 facility */ #define FAC_MSA4 S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */ #define FAC_MSA5 S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */ +#define FAC_ECT S390_FEAT_EXTRACT_CPU_TIME static const DisasInsn insn_info[] = { #include "insn-data.def" |