[v10,07/21] tcg: Add generic vector ops for comparisons

Message ID	20180117160933.28086-8-richard.henderson@linaro.org
State	Superseded
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; From: Richard Henderson <richard.henderson@linaro.org> To: qemu-devel@nongnu.org Date: Wed, 17 Jan 2018 08:09:19 -0800 Message-Id: <20180117160933.28086-8-richard.henderson@linaro.org> In-Reply-To: <20180117160933.28086-1-richard.henderson@linaro.org> References: <20180117160933.28086-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH v10 07/21] tcg: Add generic vector ops for comparisons Precedence: list Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" <qemu-devel-bounces+patch=linaro.org@nongnu.org>
Series	tcg: generic vector operations \| expand [v10,00/21] tcg: generic vector operations [v10,01/21] tcg: Allow multiple word entries into the constant pool [v10,02/21] tcg: Add types and basic operations for host vectors [v10,03/21] tcg: Standardize integral arguments to expanders [v10,04/21] tcg: Add generic vector expanders [v10,05/21] tcg: Loosen vec_gen_op* typecheck rules [v10,06/21] tcg: Add generic vector ops for constant shifts [v10,07/21] tcg: Add generic vector ops for comparisons [v10,08/21] tcg: Add generic vector ops for multiplication [v10,09/21] tcg: Add generic helpers for saturating arithmetic

diff --git a/accel/tcg/tcg-runtime.h b/accel/tcg/tcg-runtime.h index df23c9aea9..c840debc40 100644 --- a/accel/tcg/tcg-runtime.h +++ b/accel/tcg/tcg-runtime.h @@ -178,3 +178,33 @@ DEF_HELPER_FLAGS_3(gvec_sar8i, TCG_CALL_NO_RWG, void, ptr, ptr, i32) DEF_HELPER_FLAGS_3(gvec_sar16i, TCG_CALL_NO_RWG, void, ptr, ptr, i32) DEF_HELPER_FLAGS_3(gvec_sar32i, TCG_CALL_NO_RWG, void, ptr, ptr, i32) DEF_HELPER_FLAGS_3(gvec_sar64i, TCG_CALL_NO_RWG, void, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_eq8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_eq16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_eq32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_eq64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_ne8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ne16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ne32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ne64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_lt8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_lt16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_lt32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_lt64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_le8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_le16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_le32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_le64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_ltu8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ltu16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ltu32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_ltu64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) + +DEF_HELPER_FLAGS_4(gvec_leu8, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_leu16, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_leu32, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_4(gvec_leu64, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) diff --git a/tcg/tcg-op-gvec.h b/tcg/tcg-op-gvec.h index c440fc155a..8f327f83b1 100644 --- a/tcg/tcg-op-gvec.h +++ b/tcg/tcg-op-gvec.h @@ -207,6 +207,10 @@ void tcg_gen_gvec_shri(unsigned vece, uint32_t dofs, uint32_t aofs, void tcg_gen_gvec_sari(unsigned vece, uint32_t dofs, uint32_t aofs, uint32_t oprsz, uint32_t maxsz, unsigned shift); +void tcg_gen_gvec_cmp(TCGCond cond, unsigned vece, uint32_t dofs, + uint32_t aofs, uint32_t bofs, + uint32_t oprsz, uint32_t maxsz); + /* * 64-bit vector operations. Use these when the register has been allocated * with tcg_global_mem_new_i64, and so we cannot also address it via pointer. diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index 159d1275f5..a8874694f8 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -932,6 +932,9 @@ void tcg_gen_shli_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i); void tcg_gen_shri_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i); void tcg_gen_sari_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i); +void tcg_gen_cmp_vec(TCGCond cond, unsigned vece, TCGv_vec r, + TCGv_vec a, TCGv_vec b); + void tcg_gen_ld_vec(TCGv_vec r, TCGv_ptr base, TCGArg offset); void tcg_gen_st_vec(TCGv_vec r, TCGv_ptr base, TCGArg offset); void tcg_gen_stl_vec(TCGv_vec r, TCGv_ptr base, TCGArg offset, TCGType t); diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h index 7263bc5df4..5097dac228 100644 --- a/tcg/tcg-opc.h +++ b/tcg/tcg-opc.h @@ -241,6 +241,8 @@ DEF(shlv_vec, 1, 2, 0, IMPLVEC | IMPL(TCG_TARGET_HAS_shv_vec)) DEF(shrv_vec, 1, 2, 0, IMPLVEC | IMPL(TCG_TARGET_HAS_shv_vec)) DEF(sarv_vec, 1, 2, 0, IMPLVEC | IMPL(TCG_TARGET_HAS_shv_vec)) +DEF(cmp_vec, 1, 2, 1, IMPLVEC) + DEF(last_generic, 0, 0, 0, TCG_OPF_NOT_PRESENT) #if TCG_TARGET_MAYBE_vec diff --git a/accel/tcg/tcg-runtime-gvec.c b/accel/tcg/tcg-runtime-gvec.c index 06e6114dd8..5c93ea898f 100644 --- a/accel/tcg/tcg-runtime-gvec.c +++ b/accel/tcg/tcg-runtime-gvec.c @@ -467,3 +467,39 @@ void HELPER(gvec_sar64i)(void *d, void *a, uint32_t desc) } clear_high(d, oprsz, desc); } + +/* If vectors are enabled, the compiler fills in -1 for true. + Otherwise, we must take care of this by hand. */ +#ifdef CONFIG_VECTOR16 +# define DO_CMP0(X) X +#else +# define DO_CMP0(X) -(X) +#endif + +#define DO_CMP1(NAME, TYPE, OP) \ +void HELPER(NAME)(void *d, void *a, void *b, uint32_t desc) \ +{ \ + intptr_t oprsz = simd_oprsz(desc); \ + intptr_t i; \ + for (i = 0; i < oprsz; i += sizeof(vec64)) { \ + *(TYPE *)(d + i) = DO_CMP0(*(TYPE *)(a + i) OP *(TYPE *)(b + i)); \ + } \ + clear_high(d, oprsz, desc); \ +} + +#define DO_CMP2(SZ) \ + DO_CMP1(gvec_eq##SZ, vec##SZ, ==) \ + DO_CMP1(gvec_ne##SZ, vec##SZ, !=) \ + DO_CMP1(gvec_lt##SZ, svec##SZ, <) \ + DO_CMP1(gvec_le##SZ, svec##SZ, <=) \ + DO_CMP1(gvec_ltu##SZ, vec##SZ, <) \ + DO_CMP1(gvec_leu##SZ, vec##SZ, <=) + +DO_CMP2(8) +DO_CMP2(16) +DO_CMP2(32) +DO_CMP2(64) + +#undef DO_CMP0 +#undef DO_CMP1 +#undef DO_CMP2 diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c index edf9311e6c..caf58e89a9 100644 --- a/tcg/tcg-op-gvec.c +++ b/tcg/tcg-op-gvec.c @@ -1565,3 +1565,150 @@ void tcg_gen_gvec_sari(unsigned vece, uint32_t dofs, uint32_t aofs, tcg_gen_gvec_2i(dofs, aofs, oprsz, maxsz, shift, &g[vece]); } } + +/* Expand OPSZ bytes worth of three-operand operations using i32 elements. */ +static void expand_cmp_i32(uint32_t dofs, uint32_t aofs, uint32_t bofs, + uint32_t oprsz, TCGCond cond) +{ + TCGv_i32 t0 = tcg_temp_new_i32(); + TCGv_i32 t1 = tcg_temp_new_i32(); + uint32_t i; + + for (i = 0; i < oprsz; i += 4) { + tcg_gen_ld_i32(t0, cpu_env, aofs + i); + tcg_gen_ld_i32(t1, cpu_env, bofs + i); + tcg_gen_setcond_i32(cond, t0, t0, t1); + tcg_gen_neg_i32(t0, t0); + tcg_gen_st_i32(t0, cpu_env, dofs + i); + } + tcg_temp_free_i32(t1); + tcg_temp_free_i32(t0); +} + +static void expand_cmp_i64(uint32_t dofs, uint32_t aofs, uint32_t bofs, + uint32_t oprsz, TCGCond cond) +{ + TCGv_i64 t0 = tcg_temp_new_i64(); + TCGv_i64 t1 = tcg_temp_new_i64(); + uint32_t i; + + for (i = 0; i < oprsz; i += 8) { + tcg_gen_ld_i64(t0, cpu_env, aofs + i); + tcg_gen_ld_i64(t1, cpu_env, bofs + i); + tcg_gen_setcond_i64(cond, t0, t0, t1); + tcg_gen_neg_i64(t0, t0); + tcg_gen_st_i64(t0, cpu_env, dofs + i); + } + tcg_temp_free_i64(t1); + tcg_temp_free_i64(t0); +} + +static void expand_cmp_vec(unsigned vece, uint32_t dofs, uint32_t aofs, + uint32_t bofs, uint32_t oprsz, uint32_t tysz, + TCGType type, TCGCond cond) +{ + TCGv_vec t0 = tcg_temp_new_vec(type); + TCGv_vec t1 = tcg_temp_new_vec(type); + uint32_t i; + + for (i = 0; i < oprsz; i += tysz) { + tcg_gen_ld_vec(t0, cpu_env, aofs + i); + tcg_gen_ld_vec(t1, cpu_env, bofs + i); + tcg_gen_cmp_vec(cond, vece, t0, t0, t1); + tcg_gen_st_vec(t0, cpu_env, dofs + i); + } + tcg_temp_free_vec(t1); + tcg_temp_free_vec(t0); +} + +void tcg_gen_gvec_cmp(TCGCond cond, unsigned vece, uint32_t dofs, + uint32_t aofs, uint32_t bofs, + uint32_t oprsz, uint32_t maxsz) +{ + static gen_helper_gvec_3 * const eq_fn[4] = { + gen_helper_gvec_eq8, gen_helper_gvec_eq16, + gen_helper_gvec_eq32, gen_helper_gvec_eq64 + }; + static gen_helper_gvec_3 * const ne_fn[4] = { + gen_helper_gvec_ne8, gen_helper_gvec_ne16, + gen_helper_gvec_ne32, gen_helper_gvec_ne64 + }; + static gen_helper_gvec_3 * const lt_fn[4] = { + gen_helper_gvec_lt8, gen_helper_gvec_lt16, + gen_helper_gvec_lt32, gen_helper_gvec_lt64 + }; + static gen_helper_gvec_3 * const le_fn[4] = { + gen_helper_gvec_le8, gen_helper_gvec_le16, + gen_helper_gvec_le32, gen_helper_gvec_le64 + }; + static gen_helper_gvec_3 * const ltu_fn[4] = { + gen_helper_gvec_ltu8, gen_helper_gvec_ltu16, + gen_helper_gvec_ltu32, gen_helper_gvec_ltu64 + }; + static gen_helper_gvec_3 * const leu_fn[4] = { + gen_helper_gvec_leu8, gen_helper_gvec_leu16, + gen_helper_gvec_leu32, gen_helper_gvec_leu64 + }; + static gen_helper_gvec_3 * const * const fns[16] = { + [TCG_COND_EQ] = eq_fn, + [TCG_COND_NE] = ne_fn, + [TCG_COND_LT] = lt_fn, + [TCG_COND_LE] = le_fn, + [TCG_COND_LTU] = ltu_fn, + [TCG_COND_LEU] = leu_fn, + }; + + check_size_align(oprsz, maxsz, dofs | aofs | bofs); + check_overlap_3(dofs, aofs, bofs, maxsz); + + if (cond == TCG_COND_NEVER || cond == TCG_COND_ALWAYS) { + do_dup(MO_8, dofs, oprsz, maxsz, + NULL, NULL, -(cond == TCG_COND_ALWAYS)); + return; + } + + /* Recall that ARM SVE allows vector sizes that are not a power of 2. + Expand with successively smaller host vector sizes. The intent is + that e.g. oprsz == 80 would be expanded with 2x32 + 1x16. */ + + if (TCG_TARGET_HAS_v256 && check_size_impl(oprsz, 32) + && tcg_can_emit_vec_op(INDEX_op_cmp_vec, TCG_TYPE_V256, vece)) { + uint32_t done = QEMU_ALIGN_DOWN(oprsz, 32); + expand_cmp_vec(vece, dofs, aofs, bofs, done, 32, TCG_TYPE_V256, cond); + dofs += done; + aofs += done; + bofs += done; + oprsz -= done; + maxsz -= done; + } + + if (TCG_TARGET_HAS_v128 && check_size_impl(oprsz, 16) + && tcg_can_emit_vec_op(INDEX_op_cmp_vec, TCG_TYPE_V128, vece)) { + expand_cmp_vec(vece, dofs, aofs, bofs, oprsz, 16, TCG_TYPE_V128, cond); + } else if (TCG_TARGET_HAS_v64 + && check_size_impl(oprsz, 8) + && (TCG_TARGET_REG_BITS == 32 || vece != MO_64) + && tcg_can_emit_vec_op(INDEX_op_cmp_vec, TCG_TYPE_V64, vece)) { + expand_cmp_vec(vece, dofs, aofs, bofs, oprsz, 8, TCG_TYPE_V64, cond); + } else if (vece == MO_64 && check_size_impl(oprsz, 8)) { + expand_cmp_i64(dofs, aofs, bofs, oprsz, cond); + } else if (vece == MO_32 && check_size_impl(oprsz, 4)) { + expand_cmp_i32(dofs, aofs, bofs, oprsz, cond); + } else { + gen_helper_gvec_3 * const *fn = fns[cond]; + + if (fn == NULL) { + uint32_t tmp; + tmp = aofs, aofs = bofs, bofs = tmp; + cond = tcg_swap_cond(cond); + fn = fns[cond]; + assert(fn != NULL); + } + tcg_gen_gvec_3_ool(dofs, aofs, bofs, oprsz, maxsz, 0, fn[vece]); + return; + } + + if (oprsz < maxsz) { + expand_clr(dofs + oprsz, maxsz - oprsz); + } +} diff --git a/tcg/tcg-op-vec.c b/tcg/tcg-op-vec.c index ce892dfa6e..ba99fdb431 100644 --- a/tcg/tcg-op-vec.c +++ b/tcg/tcg-op-vec.c @@ -427,3 +427,26 @@ void tcg_gen_sari_vec(unsigned vece, TCGv_vec r, TCGv_vec a, int64_t i) { do_shifti(INDEX_op_sari_vec, vece, r, a, i); } + +void tcg_gen_cmp_vec(TCGCond cond, unsigned vece, + TCGv_vec r, TCGv_vec a, TCGv_vec b) +{ + TCGTemp *rt = tcgv_vec_temp(r); + TCGTemp *at = tcgv_vec_temp(a); + TCGTemp *bt = tcgv_vec_temp(b); + TCGArg ri = temp_arg(rt); + TCGArg ai = temp_arg(at); + TCGArg bi = temp_arg(bt); + TCGType type = rt->base_type; + int can; + + tcg_debug_assert(at->base_type == type); + tcg_debug_assert(bt->base_type == type); + can = tcg_can_emit_vec_op(INDEX_op_cmp_vec, type, vece); + if (can > 0) { + vec_gen_4(INDEX_op_cmp_vec, type, vece, ri, ai, bi, cond); + } else { + tcg_debug_assert(can < 0); + tcg_expand_vec_op(INDEX_op_cmp_vec, type, vece, ri, ai, bi, cond); + } +} diff --git a/tcg/tcg.c b/tcg/tcg.c index cdb39d62f5..ab356d1295 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -1392,6 +1392,7 @@ bool tcg_op_supported(TCGOpcode op) case INDEX_op_and_vec: case INDEX_op_or_vec: case INDEX_op_xor_vec: + case INDEX_op_cmp_vec: return have_vec; case INDEX_op_dup2_vec: return have_vec && TCG_TARGET_REG_BITS == 32; @@ -1782,6 +1783,7 @@ void tcg_dump_ops(TCGContext *s) case INDEX_op_brcond_i64: case INDEX_op_setcond_i64: case INDEX_op_movcond_i64: + case INDEX_op_cmp_vec: if (op->args[k] < ARRAY_SIZE(cond_name) && cond_name[op->args[k]]) { col += qemu_log(",%s", cond_name[op->args[k++]]); diff --git a/tcg/README b/tcg/README index cf40268a57..e486445cd0 100644 --- a/tcg/README +++ b/tcg/README @@ -590,6 +590,10 @@ E.g. VECL=1 -> 64 << 1 -> v128, and VECE=2 -> 1 << 2 -> i32. Similarly for logical and arithmetic right shift. +* cmp_vec v0, v1, v2, cond + + Compare vectors by element, storing -1 for true and 0 for false. + ********* Note 1: Some shortcuts are defined when the last operand is known to be

[v10,07/21] tcg: Add generic vector ops for comparisons

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