From 13b0228f77ffa14a0f82bd8a9d0fd5859b0d6a7d Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Fri, 24 May 2019 11:23:49 +0200 Subject: [PATCH] s390x/tcg: Implement VECTOR STRING RANGE COMPARE Unfortunately, there is no easy way to avoid looping over all elements in v2. Provide specialized variants for !cc,!rt/!cc,rt/cc,!rt/cc,rt and all element types. Especially for different values of rt, the compiler might be able to optimize the code a lot. Add s390_vec_write_element(). Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/helper.h | 12 +++ target/s390x/insn-data.def | 2 + target/s390x/translate_vx.inc.c | 59 +++++++++++++ target/s390x/vec.h | 21 +++++ target/s390x/vec_string_helper.c | 143 +++++++++++++++++++++++++++++++ 5 files changed, 237 insertions(+) diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 1f9f0b463b..5db67779d3 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -236,6 +236,18 @@ DEF_HELPER_FLAGS_3(gvec_vistr32, TCG_CALL_NO_RWG, void, ptr, cptr, i32) DEF_HELPER_4(gvec_vistr_cc8, void, ptr, cptr, env, i32) DEF_HELPER_4(gvec_vistr_cc16, void, ptr, cptr, env, i32) DEF_HELPER_4(gvec_vistr_cc32, void, ptr, cptr, env, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc32, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc_rt8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc_rt16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_5(gvec_vstrc_rt32, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, cptr, i32) +DEF_HELPER_6(gvec_vstrc_cc8, void, ptr, cptr, cptr, cptr, env, i32) +DEF_HELPER_6(gvec_vstrc_cc16, void, ptr, cptr, cptr, cptr, env, i32) +DEF_HELPER_6(gvec_vstrc_cc32, void, ptr, cptr, cptr, cptr, env, i32) +DEF_HELPER_6(gvec_vstrc_cc_rt8, void, ptr, cptr, cptr, cptr, env, i32) +DEF_HELPER_6(gvec_vstrc_cc_rt16, void, ptr, cptr, cptr, cptr, env, i32) +DEF_HELPER_6(gvec_vstrc_cc_rt32, void, ptr, cptr, cptr, cptr, env, i32) #ifndef CONFIG_USER_ONLY DEF_HELPER_3(servc, i32, env, i64, i64) diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index b4a6b59608..a2969fab58 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -1201,6 +1201,8 @@ F(0xe781, VFENE, VRR_b, V, 0, 0, 0, 0, vfene, 0, IF_VEC) /* VECTOR ISOLATE STRING */ F(0xe75c, VISTR, VRR_a, V, 0, 0, 0, 0, vistr, 0, IF_VEC) +/* VECTOR STRING RANGE COMPARE */ + F(0xe78a, VSTRC, VRR_d, V, 0, 0, 0, 0, vstrc, 0, IF_VEC) #ifndef CONFIG_USER_ONLY /* COMPARE AND SWAP AND PURGE */ diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.inc.c index 08a62eab52..f26ffa2895 100644 --- a/target/s390x/translate_vx.inc.c +++ b/target/s390x/translate_vx.inc.c @@ -217,6 +217,10 @@ static void get_vec_element_ptr_i64(TCGv_ptr ptr, uint8_t reg, TCGv_i64 enr, tcg_gen_gvec_4_ool(vec_full_reg_offset(v1), vec_full_reg_offset(v2), \ vec_full_reg_offset(v3), vec_full_reg_offset(v4), \ 16, 16, data, fn) +#define gen_gvec_4_ptr(v1, v2, v3, v4, ptr, data, fn) \ + tcg_gen_gvec_4_ptr(vec_full_reg_offset(v1), vec_full_reg_offset(v2), \ + vec_full_reg_offset(v3), vec_full_reg_offset(v4), \ + ptr, 16, 16, data, fn) #define gen_gvec_dup_i64(es, v1, c) \ tcg_gen_gvec_dup_i64(es, vec_full_reg_offset(v1), 16, 16, c) #define gen_gvec_mov(v1, v2) \ @@ -2479,3 +2483,58 @@ static DisasJumpType op_vistr(DisasContext *s, DisasOps *o) } return DISAS_NEXT; } + +static DisasJumpType op_vstrc(DisasContext *s, DisasOps *o) +{ + const uint8_t es = get_field(s->fields, m5); + const uint8_t m6 = get_field(s->fields, m6); + static gen_helper_gvec_4 * const g[3] = { + gen_helper_gvec_vstrc8, + gen_helper_gvec_vstrc16, + gen_helper_gvec_vstrc32, + }; + static gen_helper_gvec_4 * const g_rt[3] = { + gen_helper_gvec_vstrc_rt8, + gen_helper_gvec_vstrc_rt16, + gen_helper_gvec_vstrc_rt32, + }; + static gen_helper_gvec_4_ptr * const g_cc[3] = { + gen_helper_gvec_vstrc_cc8, + gen_helper_gvec_vstrc_cc16, + gen_helper_gvec_vstrc_cc32, + }; + static gen_helper_gvec_4_ptr * const g_cc_rt[3] = { + gen_helper_gvec_vstrc_cc_rt8, + gen_helper_gvec_vstrc_cc_rt16, + gen_helper_gvec_vstrc_cc_rt32, + }; + + if (es > ES_32) { + gen_program_exception(s, PGM_SPECIFICATION); + return DISAS_NORETURN; + } + + if (extract32(m6, 0, 1)) { + if (extract32(m6, 2, 1)) { + gen_gvec_4_ptr(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), get_field(s->fields, v4), + cpu_env, m6, g_cc_rt[es]); + } else { + gen_gvec_4_ptr(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), get_field(s->fields, v4), + cpu_env, m6, g_cc[es]); + } + set_cc_static(s); + } else { + if (extract32(m6, 2, 1)) { + gen_gvec_4_ool(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), get_field(s->fields, v4), + m6, g_rt[es]); + } else { + gen_gvec_4_ool(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), get_field(s->fields, v4), + m6, g[es]); + } + } + return DISAS_NEXT; +} diff --git a/target/s390x/vec.h b/target/s390x/vec.h index affc62874c..a6e361869b 100644 --- a/target/s390x/vec.h +++ b/target/s390x/vec.h @@ -117,4 +117,25 @@ static inline void s390_vec_write_element64(S390Vector *v, uint8_t enr, v->doubleword[enr] = data; } +static inline void s390_vec_write_element(S390Vector *v, uint8_t enr, + uint8_t es, uint64_t data) +{ + switch (es) { + case MO_8: + s390_vec_write_element8(v, enr, data); + break; + case MO_16: + s390_vec_write_element16(v, enr, data); + break; + case MO_32: + s390_vec_write_element32(v, enr, data); + break; + case MO_64: + s390_vec_write_element64(v, enr, data); + break; + default: + g_assert_not_reached(); + } +} + #endif /* S390X_VEC_H */ diff --git a/target/s390x/vec_string_helper.c b/target/s390x/vec_string_helper.c index 6bafa23bd7..c516c0ceeb 100644 --- a/target/s390x/vec_string_helper.c +++ b/target/s390x/vec_string_helper.c @@ -328,3 +328,146 @@ void HELPER(gvec_vistr_cc##BITS)(void *v1, const void *v2, CPUS390XState *env, \ DEF_VISTR_CC_HELPER(8) DEF_VISTR_CC_HELPER(16) DEF_VISTR_CC_HELPER(32) + +static bool element_compare(uint32_t data, uint32_t l, uint8_t c) +{ + const bool equal = extract32(c, 7, 1); + const bool lower = extract32(c, 6, 1); + const bool higher = extract32(c, 5, 1); + + if (data < l) { + return lower; + } else if (data > l) { + return higher; + } + return equal; +} + +static int vstrc(void *v1, const void *v2, const void *v3, const void *v4, + bool in, bool rt, bool zs, uint8_t es) +{ + const uint64_t mask = get_element_lsbs_mask(es); + uint64_t a0 = s390_vec_read_element64(v2, 0); + uint64_t a1 = s390_vec_read_element64(v2, 1); + int first_zero = 16, first_match = 16; + S390Vector rt_result = {}; + uint64_t z0, z1; + int i, j; + + if (zs) { + z0 = zero_search(a0, mask); + z1 = zero_search(a1, mask); + first_zero = match_index(z0, z1); + } + + for (i = 0; i < 16 / (1 << es); i++) { + const uint32_t data = s390_vec_read_element(v2, i, es); + const int cur_byte = i * (1 << es); + bool any_match = false; + + /* if we don't need a bit vector, we can stop early */ + if (cur_byte == first_zero && !rt) { + break; + } + + for (j = 0; j < 16 / (1 << es); j += 2) { + const uint32_t l1 = s390_vec_read_element(v3, j, es); + const uint32_t l2 = s390_vec_read_element(v3, j + 1, es); + /* we are only interested in the highest byte of each element */ + const uint8_t c1 = s390_vec_read_element8(v4, j * (1 << es)); + const uint8_t c2 = s390_vec_read_element8(v4, (j + 1) * (1 << es)); + + if (element_compare(data, l1, c1) && + element_compare(data, l2, c2)) { + any_match = true; + break; + } + } + /* invert the result if requested */ + any_match = in ^ any_match; + + if (any_match) { + /* indicate bit vector if requested */ + if (rt) { + const uint64_t val = -1ull; + + first_match = MIN(cur_byte, first_match); + s390_vec_write_element(&rt_result, i, es, val); + } else { + /* stop on the first match */ + first_match = cur_byte; + break; + } + } + } + + if (rt) { + *(S390Vector *)v1 = rt_result; + } else { + s390_vec_write_element64(v1, 0, MIN(first_match, first_zero)); + s390_vec_write_element64(v1, 1, 0); + } + + if (first_zero == 16 && first_match == 16) { + return 3; /* no match */ + } else if (first_zero == 16) { + return 1; /* matching elements, no match for zero */ + } else if (first_match < first_zero) { + return 2; /* matching elements before match for zero */ + } + return 0; /* match for zero */ +} + +#define DEF_VSTRC_HELPER(BITS) \ +void HELPER(gvec_vstrc##BITS)(void *v1, const void *v2, const void *v3, \ + const void *v4, uint32_t desc) \ +{ \ + const bool in = extract32(simd_data(desc), 3, 1); \ + const bool zs = extract32(simd_data(desc), 1, 1); \ + \ + vstrc(v1, v2, v3, v4, in, 0, zs, MO_##BITS); \ +} +DEF_VSTRC_HELPER(8) +DEF_VSTRC_HELPER(16) +DEF_VSTRC_HELPER(32) + +#define DEF_VSTRC_RT_HELPER(BITS) \ +void HELPER(gvec_vstrc_rt##BITS)(void *v1, const void *v2, const void *v3, \ + const void *v4, uint32_t desc) \ +{ \ + const bool in = extract32(simd_data(desc), 3, 1); \ + const bool zs = extract32(simd_data(desc), 1, 1); \ + \ + vstrc(v1, v2, v3, v4, in, 1, zs, MO_##BITS); \ +} +DEF_VSTRC_RT_HELPER(8) +DEF_VSTRC_RT_HELPER(16) +DEF_VSTRC_RT_HELPER(32) + +#define DEF_VSTRC_CC_HELPER(BITS) \ +void HELPER(gvec_vstrc_cc##BITS)(void *v1, const void *v2, const void *v3, \ + const void *v4, CPUS390XState *env, \ + uint32_t desc) \ +{ \ + const bool in = extract32(simd_data(desc), 3, 1); \ + const bool zs = extract32(simd_data(desc), 1, 1); \ + \ + env->cc_op = vstrc(v1, v2, v3, v4, in, 0, zs, MO_##BITS); \ +} +DEF_VSTRC_CC_HELPER(8) +DEF_VSTRC_CC_HELPER(16) +DEF_VSTRC_CC_HELPER(32) + +#define DEF_VSTRC_CC_RT_HELPER(BITS) \ +void HELPER(gvec_vstrc_cc_rt##BITS)(void *v1, const void *v2, const void *v3, \ + const void *v4, CPUS390XState *env, \ + uint32_t desc) \ +{ \ + const bool in = extract32(simd_data(desc), 3, 1); \ + const bool zs = extract32(simd_data(desc), 1, 1); \ + \ + env->cc_op = vstrc(v1, v2, v3, v4, in, 1, zs, MO_##BITS); \ +} +DEF_VSTRC_CC_RT_HELPER(8) +DEF_VSTRC_CC_RT_HELPER(16) +DEF_VSTRC_CC_RT_HELPER(32)