openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

s390x/tcg: Implement VECTOR LOAD ROUNDED 

We can reuse some of the infrastructure introduced for
VECTOR FP CONVERT FROM FIXED 64-BIT and friends.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-05-29 22:06:42 +02:00
parent 1a76e59da3
commit 4500ede452
4 changed files with 50 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target/s390x/helper.h
View File

@ -280,6 +280,8 @@ DEF_HELPER_FLAGS_4(gvec_vfi64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vfi64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vfll32, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vfll32s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vflr64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vflr64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

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

@ -1232,6 +1232,8 @@
F(0xe7c7, VFI, VRR_a, V, 0, 0, 0, 0, vcdg, 0, IF_VEC)
/* VECTOR LOAD LENGTHENED */
F(0xe7c4, VFLL, VRR_a, V, 0, 0, 0, 0, vfll, 0, IF_VEC)
/* VECTOR LOAD ROUNDED */
F(0xe7c5, VFLR, VRR_a, V, 0, 0, 0, 0, vcdg, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

3
target/s390x/translate_vx.inc.c
View File

@ -2672,6 +2672,9 @@ static DisasJumpType op_vcdg(DisasContext *s, DisasOps *o)
case 0xc7:
fn = se ? gen_helper_gvec_vfi64s : gen_helper_gvec_vfi64;
break;
case 0xc5:
fn = se ? gen_helper_gvec_vflr64s : gen_helper_gvec_vflr64;
break;
default:
g_assert_not_reached();
}

43
target/s390x/vec_fpu_helper.c
View File

@ -444,3 +444,46 @@ void HELPER(gvec_vfll32s)(void *v1, const void *v2, CPUS390XState *env,
{
vfll32(v1, v2, env, true, GETPC());
}
static void vflr64(S390Vector *v1, const S390Vector *v2, CPUS390XState *env,
bool s, bool XxC, uint8_t erm, uintptr_t retaddr)
{
uint8_t vxc, vec_exc = 0;
S390Vector tmp = {};
int i, old_mode;
old_mode = s390_swap_bfp_rounding_mode(env, erm);
for (i = 0; i < 2; i++) {
float64 a = s390_vec_read_element64(v2, i);
uint32_t ret = float64_to_float32(a, &env->fpu_status);
/* place at even element */
s390_vec_write_element32(&tmp, i * 2, ret);
/* indicate the source element */
vxc = check_ieee_exc(env, i, XxC, &vec_exc);
if (s || vxc) {
break;
}
}
s390_restore_bfp_rounding_mode(env, old_mode);
handle_ieee_exc(env, vxc, vec_exc, retaddr);
*v1 = tmp;
}
void HELPER(gvec_vflr64)(void *v1, const void *v2, CPUS390XState *env,
uint32_t desc)
{
const uint8_t erm = extract32(simd_data(desc), 4, 4);
const bool XxC = extract32(simd_data(desc), 2, 1);
vflr64(v1, v2, env, false, XxC, erm, GETPC());
}
void HELPER(gvec_vflr64s)(void *v1, const void *v2, CPUS390XState *env,
uint32_t desc)
{
const uint8_t erm = extract32(simd_data(desc), 4, 4);
const bool XxC = extract32(simd_data(desc), 2, 1);
vflr64(v1, v2, env, true, XxC, erm, GETPC());
}