mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

s390x/tcg: Implement VECTOR STORE WITH LENGTH

Browse Source 
Very similar to VECTOR LOAD WITH LENGTH, just the opposite direction.
Properly probe write access before modifying memory.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190307121539.12842-32-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2019-03-07 13:15:38 +01:00 committed by Cornelia Huck
parent 29b8bcf140
commit 0e0a5b49ad
4 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
target/s390x/helper.h
View File

@ -143,6 +143,7 @@ DEF_HELPER_5(gvec_vpkls_cc16, void, ptr, cptr, cptr, env, i32)
DEF_HELPER_5(gvec_vpkls_cc32, void, ptr, cptr, cptr, env, i32)
DEF_HELPER_5(gvec_vpkls_cc64, void, ptr, cptr, cptr, env, i32)
DEF_HELPER_FLAGS_5(gvec_vperm, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32)
DEF_HELPER_FLAGS_4(vstl, TCG_CALL_NO_WG, void, env, cptr, i64, i64)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

2
target/s390x/insn-data.def
View File

@ -1043,6 +1043,8 @@
E(0xe70a, VSTEG, VRX, V, la2, 0, 0, 0, vste, 0, ES_64, IF_VEC)
/* VECTOR STORE MULTIPLE */
F(0xe73e, VSTM, VRS_a, V, la2, 0, 0, 0, vstm, 0, IF_VEC)
/* VECTOR STORE WITH LENGTH */
F(0xe73f, VSTL, VRS_b, V, la2, r3_32u, 0, 0, vstl, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

13
target/s390x/translate_vx.inc.c
View File

@ -882,3 +882,16 @@ static DisasJumpType op_vstm(DisasContext *s, DisasOps *o)
tcg_temp_free_i64(tmp);
return DISAS_NEXT;
}
static DisasJumpType op_vstl(DisasContext *s, DisasOps *o)
{
const int v1_offs = vec_full_reg_offset(get_field(s->fields, v1));
TCGv_ptr a0 = tcg_temp_new_ptr();
/* convert highest index into an actual length */
tcg_gen_addi_i64(o->in2, o->in2, 1);
tcg_gen_addi_ptr(a0, cpu_env, v1_offs);
gen_helper_vstl(cpu_env, a0, o->addr1, o->in2);
tcg_temp_free_ptr(a0);
return DISAS_NEXT;
}

24
target/s390x/vec_helper.c
View File

@ -167,3 +167,27 @@ void HELPER(gvec_vperm)(void *v1, const void *v2, const void *v3,
}
*(S390Vector *)v1 = tmp;
}
void HELPER(vstl)(CPUS390XState *env, const void *v1, uint64_t addr,
uint64_t bytes)
{
/* Probe write access before actually modifying memory */
probe_write_access(env, addr, bytes, GETPC());
if (likely(bytes >= 16)) {
cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 0), GETPC());
addr = wrap_address(env, addr + 8);
cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 1), GETPC());
} else {
S390Vector tmp = {};
int i;
for (i = 0; i < bytes; i++) {
uint8_t byte = s390_vec_read_element8(v1, i);
cpu_stb_data_ra(env, addr, byte, GETPC());
addr = wrap_address(env, addr + 1);
}
*(S390Vector *)v1 = tmp;
}
}