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target/arm: Implement SVE Memory Contiguous Load Group 

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180627043328.11531-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2018-06-29 15:11:02 +01:00 committed by Peter Maydell
parent e2eb3d29d7
commit c4e7c493da
4 changed files with 343 additions and 0 deletions
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35
target/arm/helper-sve.h
View File

@ -719,3 +719,38 @@ DEF_HELPER_FLAGS_5(gvec_rsqrts_s, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(gvec_rsqrts_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(sve_ld1bb_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld2bb_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld3bb_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld4bb_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1hh_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld2hh_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld3hh_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld4hh_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1ss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld2ss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld3ss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld4ss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1dd_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld2dd_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld3dd_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld4dd_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bhu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bsu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bdu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bhs_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1bds_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1hsu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1hdu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1hss_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1hds_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1sdu_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)
DEF_HELPER_FLAGS_4(sve_ld1sds_r, TCG_CALL_NO_WG, void, env, ptr, tl, i32)

34
target/arm/sve.decode
View File

@ -45,6 +45,9 @@
# Unsigned 8-bit immediate, optionally shifted left by 8.
%sh8_i8u 5:9 !function=expand_imm_sh8u
# Unsigned load of msz into esz=2, represented as a dtype.
%msz_dtype 23:2 !function=msz_dtype
# Either a copy of rd (at bit 0), or a different source
# as propagated via the MOVPRFX instruction.
%reg_movprfx 0:5
@ -71,6 +74,8 @@
&incdec2_cnt rd rn pat esz imm d u
&incdec_pred rd pg esz d u
&incdec2_pred rd rn pg esz d u
&rprr_load rd pg rn rm dtype nreg
&rpri_load rd pg rn imm dtype nreg
###########################################################################
# Named instruction formats. These are generally used to
@ -170,6 +175,15 @@
@incdec2_pred ........ esz:2 .... .. ..... .. pg:4 rd:5 \
&incdec2_pred rn=%reg_movprfx
# Loads; user must fill in NREG.
@rprr_load_dt ....... dtype:4 rm:5 ... pg:3 rn:5 rd:5 &rprr_load
@rpri_load_dt ....... dtype:4 . imm:s4 ... pg:3 rn:5 rd:5 &rpri_load
@rprr_load_msz ....... .... rm:5 ... pg:3 rn:5 rd:5 \
&rprr_load dtype=%msz_dtype
@rpri_load_msz ....... .... . imm:s4 ... pg:3 rn:5 rd:5 \
&rpri_load dtype=%msz_dtype
###########################################################################
# Instruction patterns. Grouped according to the SVE encodingindex.xhtml.
@ -665,3 +679,23 @@ LDR_pri 10000101 10 ...... 000 ... ..... 0 .... @pd_rn_i9
# SVE load vector register
LDR_zri 10000101 10 ...... 010 ... ..... ..... @rd_rn_i9
### SVE Memory Contiguous Load Group
# SVE contiguous load (scalar plus scalar)
LD_zprr 1010010 .... ..... 010 ... ..... ..... @rprr_load_dt nreg=0
# SVE contiguous load (scalar plus immediate)
LD_zpri 1010010 .... 0.... 101 ... ..... ..... @rpri_load_dt nreg=0
# SVE contiguous non-temporal load (scalar plus scalar)
# LDNT1B, LDNT1H, LDNT1W, LDNT1D
# SVE load multiple structures (scalar plus scalar)
# LD2B, LD2H, LD2W, LD2D; etc.
LD_zprr 1010010 .. nreg:2 ..... 110 ... ..... ..... @rprr_load_msz
# SVE contiguous non-temporal load (scalar plus immediate)
# LDNT1B, LDNT1H, LDNT1W, LDNT1D
# SVE load multiple structures (scalar plus immediate)
# LD2B, LD2H, LD2W, LD2D; etc.
LD_zpri 1010010 .. nreg:2 0.... 111 ... ..... ..... @rpri_load_msz

153
target/arm/sve_helper.c
View File

@ -2810,3 +2810,156 @@ uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc)
return predtest_ones(d, oprsz, esz_mask);
}
/*
* Load contiguous data, protected by a governing predicate.
*/
#define DO_LD1(NAME, FN, TYPEE, TYPEM, H) \
static void do_##NAME(CPUARMState *env, void *vd, void *vg, \
target_ulong addr, intptr_t oprsz, \
uintptr_t ra) \
{ \
intptr_t i = 0; \
do { \
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3)); \
do { \
TYPEM m = 0; \
if (pg & 1) { \
m = FN(env, addr, ra); \
} \
*(TYPEE *)(vd + H(i)) = m; \
i += sizeof(TYPEE), pg >>= sizeof(TYPEE); \
addr += sizeof(TYPEM); \
} while (i & 15); \
} while (i < oprsz); \
} \
void HELPER(NAME)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
do_##NAME(env, &env->vfp.zregs[simd_data(desc)], vg, \
addr, simd_oprsz(desc), GETPC()); \
}
#define DO_LD2(NAME, FN, TYPEE, TYPEM, H) \
void HELPER(NAME)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
intptr_t i, oprsz = simd_oprsz(desc); \
intptr_t ra = GETPC(); \
unsigned rd = simd_data(desc); \
void *d1 = &env->vfp.zregs[rd]; \
void *d2 = &env->vfp.zregs[(rd + 1) & 31]; \
for (i = 0; i < oprsz; ) { \
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3)); \
do { \
TYPEM m1 = 0, m2 = 0; \
if (pg & 1) { \
m1 = FN(env, addr, ra); \
m2 = FN(env, addr + sizeof(TYPEM), ra); \
} \
*(TYPEE *)(d1 + H(i)) = m1; \
*(TYPEE *)(d2 + H(i)) = m2; \
i += sizeof(TYPEE), pg >>= sizeof(TYPEE); \
addr += 2 * sizeof(TYPEM); \
} while (i & 15); \
} \
}
#define DO_LD3(NAME, FN, TYPEE, TYPEM, H) \
void HELPER(NAME)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
intptr_t i, oprsz = simd_oprsz(desc); \
intptr_t ra = GETPC(); \
unsigned rd = simd_data(desc); \
void *d1 = &env->vfp.zregs[rd]; \
void *d2 = &env->vfp.zregs[(rd + 1) & 31]; \
void *d3 = &env->vfp.zregs[(rd + 2) & 31]; \
for (i = 0; i < oprsz; ) { \
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3)); \
do { \
TYPEM m1 = 0, m2 = 0, m3 = 0; \
if (pg & 1) { \
m1 = FN(env, addr, ra); \
m2 = FN(env, addr + sizeof(TYPEM), ra); \
m3 = FN(env, addr + 2 * sizeof(TYPEM), ra); \
} \
*(TYPEE *)(d1 + H(i)) = m1; \
*(TYPEE *)(d2 + H(i)) = m2; \
*(TYPEE *)(d3 + H(i)) = m3; \
i += sizeof(TYPEE), pg >>= sizeof(TYPEE); \
addr += 3 * sizeof(TYPEM); \
} while (i & 15); \
} \
}
#define DO_LD4(NAME, FN, TYPEE, TYPEM, H) \
void HELPER(NAME)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
intptr_t i, oprsz = simd_oprsz(desc); \
intptr_t ra = GETPC(); \
unsigned rd = simd_data(desc); \
void *d1 = &env->vfp.zregs[rd]; \
void *d2 = &env->vfp.zregs[(rd + 1) & 31]; \
void *d3 = &env->vfp.zregs[(rd + 2) & 31]; \
void *d4 = &env->vfp.zregs[(rd + 3) & 31]; \
for (i = 0; i < oprsz; ) { \
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3)); \
do { \
TYPEM m1 = 0, m2 = 0, m3 = 0, m4 = 0; \
if (pg & 1) { \
m1 = FN(env, addr, ra); \
m2 = FN(env, addr + sizeof(TYPEM), ra); \
m3 = FN(env, addr + 2 * sizeof(TYPEM), ra); \
m4 = FN(env, addr + 3 * sizeof(TYPEM), ra); \
} \
*(TYPEE *)(d1 + H(i)) = m1; \
*(TYPEE *)(d2 + H(i)) = m2; \
*(TYPEE *)(d3 + H(i)) = m3; \
*(TYPEE *)(d4 + H(i)) = m4; \
i += sizeof(TYPEE), pg >>= sizeof(TYPEE); \
addr += 4 * sizeof(TYPEM); \
} while (i & 15); \
} \
}
DO_LD1(sve_ld1bhu_r, cpu_ldub_data_ra, uint16_t, uint8_t, H1_2)
DO_LD1(sve_ld1bhs_r, cpu_ldsb_data_ra, uint16_t, int8_t, H1_2)
DO_LD1(sve_ld1bsu_r, cpu_ldub_data_ra, uint32_t, uint8_t, H1_4)
DO_LD1(sve_ld1bss_r, cpu_ldsb_data_ra, uint32_t, int8_t, H1_4)
DO_LD1(sve_ld1bdu_r, cpu_ldub_data_ra, uint64_t, uint8_t, )
DO_LD1(sve_ld1bds_r, cpu_ldsb_data_ra, uint64_t, int8_t, )
DO_LD1(sve_ld1hsu_r, cpu_lduw_data_ra, uint32_t, uint16_t, H1_4)
DO_LD1(sve_ld1hss_r, cpu_ldsw_data_ra, uint32_t, int8_t, H1_4)
DO_LD1(sve_ld1hdu_r, cpu_lduw_data_ra, uint64_t, uint16_t, )
DO_LD1(sve_ld1hds_r, cpu_ldsw_data_ra, uint64_t, int16_t, )
DO_LD1(sve_ld1sdu_r, cpu_ldl_data_ra, uint64_t, uint32_t, )
DO_LD1(sve_ld1sds_r, cpu_ldl_data_ra, uint64_t, int32_t, )
DO_LD1(sve_ld1bb_r, cpu_ldub_data_ra, uint8_t, uint8_t, H1)
DO_LD2(sve_ld2bb_r, cpu_ldub_data_ra, uint8_t, uint8_t, H1)
DO_LD3(sve_ld3bb_r, cpu_ldub_data_ra, uint8_t, uint8_t, H1)
DO_LD4(sve_ld4bb_r, cpu_ldub_data_ra, uint8_t, uint8_t, H1)
DO_LD1(sve_ld1hh_r, cpu_lduw_data_ra, uint16_t, uint16_t, H1_2)
DO_LD2(sve_ld2hh_r, cpu_lduw_data_ra, uint16_t, uint16_t, H1_2)
DO_LD3(sve_ld3hh_r, cpu_lduw_data_ra, uint16_t, uint16_t, H1_2)
DO_LD4(sve_ld4hh_r, cpu_lduw_data_ra, uint16_t, uint16_t, H1_2)
DO_LD1(sve_ld1ss_r, cpu_ldl_data_ra, uint32_t, uint32_t, H1_4)
DO_LD2(sve_ld2ss_r, cpu_ldl_data_ra, uint32_t, uint32_t, H1_4)
DO_LD3(sve_ld3ss_r, cpu_ldl_data_ra, uint32_t, uint32_t, H1_4)
DO_LD4(sve_ld4ss_r, cpu_ldl_data_ra, uint32_t, uint32_t, H1_4)
DO_LD1(sve_ld1dd_r, cpu_ldq_data_ra, uint64_t, uint64_t, )
DO_LD2(sve_ld2dd_r, cpu_ldq_data_ra, uint64_t, uint64_t, )
DO_LD3(sve_ld3dd_r, cpu_ldq_data_ra, uint64_t, uint64_t, )
DO_LD4(sve_ld4dd_r, cpu_ldq_data_ra, uint64_t, uint64_t, )
#undef DO_LD1
#undef DO_LD2
#undef DO_LD3
#undef DO_LD4

121
target/arm/translate-sve.c
View File

@ -42,6 +42,8 @@ typedef void gen_helper_gvec_flags_3(TCGv_i32, TCGv_ptr, TCGv_ptr,
typedef void gen_helper_gvec_flags_4(TCGv_i32, TCGv_ptr, TCGv_ptr,
TCGv_ptr, TCGv_ptr, TCGv_i32);
typedef void gen_helper_gvec_mem(TCGv_env, TCGv_ptr, TCGv_i64, TCGv_i32);
/*
* Helpers for extracting complex instruction fields.
*/
@ -82,6 +84,15 @@ static inline int expand_imm_sh8u(int x)
return (uint8_t)x << (x & 0x100 ? 8 : 0);
}
/* Convert a 2-bit memory size (msz) to a 4-bit data type (dtype)
* with unsigned data. C.f. SVE Memory Contiguous Load Group.
*/
static inline int msz_dtype(int msz)
{
static const uint8_t dtype[4] = { 0, 5, 10, 15 };
return dtype[msz];
}
/*
* Include the generated decoder.
*/
@ -3526,3 +3537,113 @@ static bool trans_LDR_pri(DisasContext *s, arg_rri *a, uint32_t insn)
}
return true;
}
/*
*** SVE Memory - Contiguous Load Group
*/
/* The memory mode of the dtype. */
static const TCGMemOp dtype_mop[16] = {
MO_UB, MO_UB, MO_UB, MO_UB,
MO_SL, MO_UW, MO_UW, MO_UW,
MO_SW, MO_SW, MO_UL, MO_UL,
MO_SB, MO_SB, MO_SB, MO_Q
};
#define dtype_msz(x) (dtype_mop[x] & MO_SIZE)
/* The vector element size of dtype. */
static const uint8_t dtype_esz[16] = {
0, 1, 2, 3,
3, 1, 2, 3,
3, 2, 2, 3,
3, 2, 1, 3
};
static void do_mem_zpa(DisasContext *s, int zt, int pg, TCGv_i64 addr,
gen_helper_gvec_mem *fn)
{
unsigned vsz = vec_full_reg_size(s);
TCGv_ptr t_pg;
TCGv_i32 desc;
/* For e.g. LD4, there are not enough arguments to pass all 4
* registers as pointers, so encode the regno into the data field.
* For consistency, do this even for LD1.
*/
desc = tcg_const_i32(simd_desc(vsz, vsz, zt));
t_pg = tcg_temp_new_ptr();
tcg_gen_addi_ptr(t_pg, cpu_env, pred_full_reg_offset(s, pg));
fn(cpu_env, t_pg, addr, desc);
tcg_temp_free_ptr(t_pg);
tcg_temp_free_i32(desc);
}
static void do_ld_zpa(DisasContext *s, int zt, int pg,
TCGv_i64 addr, int dtype, int nreg)
{
static gen_helper_gvec_mem * const fns[16][4] = {
{ gen_helper_sve_ld1bb_r, gen_helper_sve_ld2bb_r,
gen_helper_sve_ld3bb_r, gen_helper_sve_ld4bb_r },
{ gen_helper_sve_ld1bhu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1bsu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1bdu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1sds_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1hh_r, gen_helper_sve_ld2hh_r,
gen_helper_sve_ld3hh_r, gen_helper_sve_ld4hh_r },
{ gen_helper_sve_ld1hsu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1hdu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1hds_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1hss_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1ss_r, gen_helper_sve_ld2ss_r,
gen_helper_sve_ld3ss_r, gen_helper_sve_ld4ss_r },
{ gen_helper_sve_ld1sdu_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1bds_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1bss_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1bhs_r, NULL, NULL, NULL },
{ gen_helper_sve_ld1dd_r, gen_helper_sve_ld2dd_r,
gen_helper_sve_ld3dd_r, gen_helper_sve_ld4dd_r },
};
gen_helper_gvec_mem *fn = fns[dtype][nreg];
/* While there are holes in the table, they are not
* accessible via the instruction encoding.
*/
assert(fn != NULL);
do_mem_zpa(s, zt, pg, addr, fn);
}
static bool trans_LD_zprr(DisasContext *s, arg_rprr_load *a, uint32_t insn)
{
if (a->rm == 31) {
return false;
}
if (sve_access_check(s)) {
TCGv_i64 addr = new_tmp_a64(s);
tcg_gen_muli_i64(addr, cpu_reg(s, a->rm),
(a->nreg + 1) << dtype_msz(a->dtype));
tcg_gen_add_i64(addr, addr, cpu_reg_sp(s, a->rn));
do_ld_zpa(s, a->rd, a->pg, addr, a->dtype, a->nreg);
}
return true;
}
static bool trans_LD_zpri(DisasContext *s, arg_rpri_load *a, uint32_t insn)
{
if (sve_access_check(s)) {
int vsz = vec_full_reg_size(s);
int elements = vsz >> dtype_esz[a->dtype];
TCGv_i64 addr = new_tmp_a64(s);
tcg_gen_addi_i64(addr, cpu_reg_sp(s, a->rn),
(a->imm * elements * (a->nreg + 1))
<< dtype_msz(a->dtype));
do_ld_zpa(s, a->rd, a->pg, addr, a->dtype, a->nreg);
}
return true;
}