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[71.212.47.143]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73e25a6a49esm3796573b3a.106.2025.04.25.15.05.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Apr 2025 15:05:42 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Pierrick Bouvier Subject: [PULL 146/159] tcg: Remove add2/sub2 opcodes Date: Fri, 25 Apr 2025 14:54:40 -0700 Message-ID: <20250425215454.886111-147-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250425215454.886111-1-richard.henderson@linaro.org> References: <20250425215454.886111-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42c; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org All uses have been replaced by add/sub carry opcodes. Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- include/tcg/tcg-opc.h | 5 -- tcg/aarch64/tcg-target-has.h | 5 -- tcg/arm/tcg-target-has.h | 4 -- tcg/i386/tcg-target-has.h | 5 -- tcg/loongarch64/tcg-target-has.h | 4 -- tcg/mips/tcg-target-has.h | 5 -- tcg/ppc/tcg-target-has.h | 4 -- tcg/riscv/tcg-target-has.h | 5 -- tcg/s390x/tcg-target-has.h | 7 --- tcg/sparc64/tcg-target-has.h | 7 --- tcg/tcg-has.h | 2 - tcg/tci/tcg-target-has.h | 4 -- tcg/optimize.c | 87 -------------------------------- tcg/tcg-op.c | 26 ---------- tcg/tcg.c | 36 ------------- docs/devel/tcg-ops.rst | 14 ++--- 16 files changed, 3 insertions(+), 217 deletions(-) diff --git a/include/tcg/tcg-opc.h b/include/tcg/tcg-opc.h index 9cc20cd62c..30ba15723a 100644 --- a/include/tcg/tcg-opc.h +++ b/include/tcg/tcg-opc.h @@ -102,8 +102,6 @@ DEF(st8_i32, 0, 2, 1, 0) DEF(st16_i32, 0, 2, 1, 0) DEF(st_i32, 0, 2, 1, 0) -DEF(add2_i32, 2, 4, 0, 0) -DEF(sub2_i32, 2, 4, 0, 0) DEF(brcond2_i32, 0, 4, 2, TCG_OPF_BB_END | TCG_OPF_COND_BRANCH) DEF(setcond2_i32, 1, 4, 1, 0) @@ -126,9 +124,6 @@ DEF(extu_i32_i64, 1, 1, 0, 0) DEF(extrl_i64_i32, 1, 1, 0, 0) DEF(extrh_i64_i32, 1, 1, 0, 0) -DEF(add2_i64, 2, 4, 0, 0) -DEF(sub2_i64, 2, 4, 0, 0) - #define DATA64_ARGS (TCG_TARGET_REG_BITS == 64 ? 1 : 2) /* There are tcg_ctx->insn_start_words here, not just one. */ diff --git a/tcg/aarch64/tcg-target-has.h b/tcg/aarch64/tcg-target-has.h index 695effd77c..b155e37639 100644 --- a/tcg/aarch64/tcg-target-has.h +++ b/tcg/aarch64/tcg-target-has.h @@ -13,14 +13,9 @@ #define have_lse2 (cpuinfo & CPUINFO_LSE2) /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #define TCG_TARGET_HAS_extr_i64_i32 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 - /* * Without FEAT_LSE2, we must use LDXP+STXP to implement atomic 128-bit load, * which requires writable pages. We must defer to the helper for user-only, diff --git a/tcg/arm/tcg-target-has.h b/tcg/arm/tcg-target-has.h index f4bd15c68a..187269e5bd 100644 --- a/tcg/arm/tcg-target-has.h +++ b/tcg/arm/tcg-target-has.h @@ -24,12 +24,8 @@ extern bool use_neon_instructions; #endif /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 - #define TCG_TARGET_HAS_qemu_ldst_i128 0 - #define TCG_TARGET_HAS_tst 1 #define TCG_TARGET_HAS_v64 use_neon_instructions diff --git a/tcg/i386/tcg-target-has.h b/tcg/i386/tcg-target-has.h index a984a6af2e..628e736de7 100644 --- a/tcg/i386/tcg-target-has.h +++ b/tcg/i386/tcg-target-has.h @@ -26,14 +26,9 @@ #define have_avx512vbmi2 ((cpuinfo & CPUINFO_AVX512VBMI2) && have_avx512vl) /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 - #if TCG_TARGET_REG_BITS == 64 /* Keep 32-bit values zero-extended in a register. */ #define TCG_TARGET_HAS_extr_i64_i32 1 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 #else #define TCG_TARGET_HAS_qemu_st8_i32 1 diff --git a/tcg/loongarch64/tcg-target-has.h b/tcg/loongarch64/tcg-target-has.h index a1bd71db6a..9c118bd1f6 100644 --- a/tcg/loongarch64/tcg-target-has.h +++ b/tcg/loongarch64/tcg-target-has.h @@ -10,14 +10,10 @@ #include "host/cpuinfo.h" /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 /* 64-bit operations */ #define TCG_TARGET_HAS_extr_i64_i32 1 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #define TCG_TARGET_HAS_qemu_ldst_i128 (cpuinfo & CPUINFO_LSX) diff --git a/tcg/mips/tcg-target-has.h b/tcg/mips/tcg-target-has.h index 9d86906bf3..d8f9f7beef 100644 --- a/tcg/mips/tcg-target-has.h +++ b/tcg/mips/tcg-target-has.h @@ -39,13 +39,8 @@ extern bool use_mips32r2_instructions; #endif /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 - #if TCG_TARGET_REG_BITS == 64 #define TCG_TARGET_HAS_extr_i64_i32 1 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #define TCG_TARGET_HAS_ext32s_i64 1 #define TCG_TARGET_HAS_ext32u_i64 1 #endif diff --git a/tcg/ppc/tcg-target-has.h b/tcg/ppc/tcg-target-has.h index 4dda668706..b978c91a62 100644 --- a/tcg/ppc/tcg-target-has.h +++ b/tcg/ppc/tcg-target-has.h @@ -18,13 +18,9 @@ /* optional instructions */ #define TCG_TARGET_HAS_qemu_st8_i32 0 -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #if TCG_TARGET_REG_BITS == 64 #define TCG_TARGET_HAS_extr_i64_i32 0 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #endif #define TCG_TARGET_HAS_qemu_ldst_i128 \ diff --git a/tcg/riscv/tcg-target-has.h b/tcg/riscv/tcg-target-has.h index c95dc1921e..8cd099546f 100644 --- a/tcg/riscv/tcg-target-has.h +++ b/tcg/riscv/tcg-target-has.h @@ -11,13 +11,8 @@ /* optional instructions */ #define TCG_TARGET_HAS_qemu_st8_i32 0 - #define TCG_TARGET_HAS_extr_i64_i32 1 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 - #define TCG_TARGET_HAS_qemu_ldst_i128 0 - #define TCG_TARGET_HAS_tst 0 /* vector instructions */ diff --git a/tcg/s390x/tcg-target-has.h b/tcg/s390x/tcg-target-has.h index 17e61130cd..c04cc4e377 100644 --- a/tcg/s390x/tcg-target-has.h +++ b/tcg/s390x/tcg-target-has.h @@ -29,16 +29,9 @@ extern uint64_t s390_facilities[3]; ((s390_facilities[FACILITY_##X / 64] >> (63 - FACILITY_##X % 64)) & 1) /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #define TCG_TARGET_HAS_extr_i64_i32 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 - -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 - #define TCG_TARGET_HAS_qemu_ldst_i128 1 - #define TCG_TARGET_HAS_tst 1 #define TCG_TARGET_HAS_v64 HAVE_FACILITY(VECTOR) diff --git a/tcg/sparc64/tcg-target-has.h b/tcg/sparc64/tcg-target-has.h index caf7679595..d9f5ef3fc9 100644 --- a/tcg/sparc64/tcg-target-has.h +++ b/tcg/sparc64/tcg-target-has.h @@ -14,16 +14,9 @@ extern bool use_vis3_instructions; #endif /* optional instructions */ -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #define TCG_TARGET_HAS_qemu_st8_i32 0 - #define TCG_TARGET_HAS_extr_i64_i32 0 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 - #define TCG_TARGET_HAS_qemu_ldst_i128 0 - #define TCG_TARGET_HAS_tst 1 #define TCG_TARGET_extract_valid(type, ofs, len) \ diff --git a/tcg/tcg-has.h b/tcg/tcg-has.h index 50e8d0cda4..2fc0e50d20 100644 --- a/tcg/tcg-has.h +++ b/tcg/tcg-has.h @@ -12,8 +12,6 @@ #if TCG_TARGET_REG_BITS == 32 /* Turn some undef macros into false macros. */ #define TCG_TARGET_HAS_extr_i64_i32 0 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #endif #if !defined(TCG_TARGET_HAS_v64) \ diff --git a/tcg/tci/tcg-target-has.h b/tcg/tci/tcg-target-has.h index 310d45ba62..497e8152b7 100644 --- a/tcg/tci/tcg-target-has.h +++ b/tcg/tci/tcg-target-has.h @@ -8,13 +8,9 @@ #define TCG_TARGET_HAS_H #define TCG_TARGET_HAS_qemu_st8_i32 0 -#define TCG_TARGET_HAS_add2_i32 0 -#define TCG_TARGET_HAS_sub2_i32 0 #if TCG_TARGET_REG_BITS == 64 #define TCG_TARGET_HAS_extr_i64_i32 0 -#define TCG_TARGET_HAS_add2_i64 0 -#define TCG_TARGET_HAS_sub2_i64 0 #endif /* TCG_TARGET_REG_BITS == 64 */ #define TCG_TARGET_HAS_qemu_ldst_i128 0 diff --git a/tcg/optimize.c b/tcg/optimize.c index 95ec3b426d..52e194aaa9 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1399,82 +1399,6 @@ static bool fold_addco(OptContext *ctx, TCGOp *op) return finish_folding(ctx, op); } -static bool fold_addsub2(OptContext *ctx, TCGOp *op, bool add) -{ - bool a_const = arg_is_const(op->args[2]) && arg_is_const(op->args[3]); - bool b_const = arg_is_const(op->args[4]) && arg_is_const(op->args[5]); - - if (a_const && b_const) { - uint64_t al = arg_info(op->args[2])->val; - uint64_t ah = arg_info(op->args[3])->val; - uint64_t bl = arg_info(op->args[4])->val; - uint64_t bh = arg_info(op->args[5])->val; - TCGArg rl, rh; - TCGOp *op2; - - if (ctx->type == TCG_TYPE_I32) { - uint64_t a = deposit64(al, 32, 32, ah); - uint64_t b = deposit64(bl, 32, 32, bh); - - if (add) { - a += b; - } else { - a -= b; - } - - al = sextract64(a, 0, 32); - ah = sextract64(a, 32, 32); - } else { - Int128 a = int128_make128(al, ah); - Int128 b = int128_make128(bl, bh); - - if (add) { - a = int128_add(a, b); - } else { - a = int128_sub(a, b); - } - - al = int128_getlo(a); - ah = int128_gethi(a); - } - - rl = op->args[0]; - rh = op->args[1]; - - /* The proper opcode is supplied by tcg_opt_gen_mov. */ - op2 = opt_insert_before(ctx, op, 0, 2); - - tcg_opt_gen_movi(ctx, op, rl, al); - tcg_opt_gen_movi(ctx, op2, rh, ah); - return true; - } - - /* Fold sub2 r,x,i to add2 r,x,-i */ - if (!add && b_const) { - uint64_t bl = arg_info(op->args[4])->val; - uint64_t bh = arg_info(op->args[5])->val; - - /* Negate the two parts without assembling and disassembling. */ - bl = -bl; - bh = ~bh + !bl; - - op->opc = (ctx->type == TCG_TYPE_I32 - ? INDEX_op_add2_i32 : INDEX_op_add2_i64); - op->args[4] = arg_new_constant(ctx, bl); - op->args[5] = arg_new_constant(ctx, bh); - } - return finish_folding(ctx, op); -} - -static bool fold_add2(OptContext *ctx, TCGOp *op) -{ - /* Note that the high and low parts may be independently swapped. */ - swap_commutative(op->args[0], &op->args[2], &op->args[4]); - swap_commutative(op->args[1], &op->args[3], &op->args[5]); - - return fold_addsub2(ctx, op, true); -} - static bool fold_and(OptContext *ctx, TCGOp *op) { uint64_t z1, z2, z_mask, s_mask; @@ -2811,11 +2735,6 @@ static bool fold_sub(OptContext *ctx, TCGOp *op) return finish_folding(ctx, op); } -static bool fold_sub2(OptContext *ctx, TCGOp *op) -{ - return fold_addsub2(ctx, op, false); -} - static void squash_prev_borrowout(OptContext *ctx, TCGOp *op) { TempOptInfo *t2; @@ -3150,9 +3069,6 @@ void tcg_optimize(TCGContext *s) case INDEX_op_addco: done = fold_addco(&ctx, op); break; - CASE_OP_32_64(add2): - done = fold_add2(&ctx, op); - break; case INDEX_op_and: case INDEX_op_and_vec: done = fold_and(&ctx, op); @@ -3342,9 +3258,6 @@ void tcg_optimize(TCGContext *s) case INDEX_op_sub_vec: done = fold_sub_vec(&ctx, op); break; - CASE_OP_32_64(sub2): - done = fold_sub2(&ctx, op); - break; case INDEX_op_xor: case INDEX_op_xor_vec: done = fold_xor(&ctx, op); diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index b0a29278ab..b0139ce05d 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -249,24 +249,6 @@ static void DNI tcg_gen_op5ii_i64(TCGOpcode opc, TCGv_i64 a1, TCGv_i64 a2, tcgv_i64_arg(a3), a4, a5); } -static void DNI tcg_gen_op6_i32(TCGOpcode opc, TCGv_i32 a1, TCGv_i32 a2, - TCGv_i32 a3, TCGv_i32 a4, - TCGv_i32 a5, TCGv_i32 a6) -{ - tcg_gen_op6(opc, TCG_TYPE_I32, tcgv_i32_arg(a1), tcgv_i32_arg(a2), - tcgv_i32_arg(a3), tcgv_i32_arg(a4), tcgv_i32_arg(a5), - tcgv_i32_arg(a6)); -} - -static void DNI tcg_gen_op6_i64(TCGOpcode opc, TCGv_i64 a1, TCGv_i64 a2, - TCGv_i64 a3, TCGv_i64 a4, - TCGv_i64 a5, TCGv_i64 a6) -{ - tcg_gen_op6(opc, TCG_TYPE_I64, tcgv_i64_arg(a1), tcgv_i64_arg(a2), - tcgv_i64_arg(a3), tcgv_i64_arg(a4), tcgv_i64_arg(a5), - tcgv_i64_arg(a6)); -} - static void DNI tcg_gen_op6i_i32(TCGOpcode opc, TCGv_i32 a1, TCGv_i32 a2, TCGv_i32 a3, TCGv_i32 a4, TCGv_i32 a5, TCGArg a6) @@ -1108,8 +1090,6 @@ void tcg_gen_add2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al, tcg_gen_op3_i32(INDEX_op_addci, rh, ah, bh); tcg_gen_mov_i32(rl, t0); tcg_temp_free_i32(t0); - } else if (TCG_TARGET_HAS_add2_i32) { - tcg_gen_op6_i32(INDEX_op_add2_i32, rl, rh, al, ah, bl, bh); } else { TCGv_i32 t0 = tcg_temp_ebb_new_i32(); TCGv_i32 t1 = tcg_temp_ebb_new_i32(); @@ -1159,8 +1139,6 @@ void tcg_gen_sub2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al, tcg_gen_op3_i32(INDEX_op_subbi, rh, ah, bh); tcg_gen_mov_i32(rl, t0); tcg_temp_free_i32(t0); - } else if (TCG_TARGET_HAS_sub2_i32) { - tcg_gen_op6_i32(INDEX_op_sub2_i32, rl, rh, al, ah, bl, bh); } else { TCGv_i32 t0 = tcg_temp_ebb_new_i32(); TCGv_i32 t1 = tcg_temp_ebb_new_i32(); @@ -2880,8 +2858,6 @@ void tcg_gen_add2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, tcg_gen_mov_i64(rl, t0); tcg_temp_free_i64(t0); - } else if (TCG_TARGET_HAS_add2_i64) { - tcg_gen_op6_i64(INDEX_op_add2_i64, rl, rh, al, ah, bl, bh); } else { TCGv_i64 t0 = tcg_temp_ebb_new_i64(); TCGv_i64 t1 = tcg_temp_ebb_new_i64(); @@ -2985,8 +2961,6 @@ void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, tcg_gen_mov_i64(rl, t0); tcg_temp_free_i64(t0); - } else if (TCG_TARGET_HAS_sub2_i64) { - tcg_gen_op6_i64(INDEX_op_sub2_i64, rl, rh, al, ah, bl, bh); } else { TCGv_i64 t0 = tcg_temp_ebb_new_i64(); TCGv_i64 t1 = tcg_temp_ebb_new_i64(); diff --git a/tcg/tcg.c b/tcg/tcg.c index 3b9f519ef6..5a498b48b6 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -2430,11 +2430,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags) case INDEX_op_st_i32: return true; - case INDEX_op_add2_i32: - return TCG_TARGET_HAS_add2_i32; - case INDEX_op_sub2_i32: - return TCG_TARGET_HAS_sub2_i32; - case INDEX_op_brcond2_i32: case INDEX_op_setcond2_i32: return TCG_TARGET_REG_BITS == 32; @@ -2456,11 +2451,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags) case INDEX_op_extrh_i64_i32: return TCG_TARGET_REG_BITS == 64; - case INDEX_op_add2_i64: - return TCG_TARGET_HAS_add2_i64; - case INDEX_op_sub2_i64: - return TCG_TARGET_HAS_sub2_i64; - case INDEX_op_mov_vec: case INDEX_op_dup_vec: case INDEX_op_dupm_vec: @@ -4101,32 +4091,6 @@ liveness_pass_1(TCGContext *s) la_reset_pref(ts); break; - case INDEX_op_add2_i32: - case INDEX_op_add2_i64: - opc_new = INDEX_op_add; - goto do_addsub2; - case INDEX_op_sub2_i32: - case INDEX_op_sub2_i64: - opc_new = INDEX_op_sub; - do_addsub2: - assert_carry_dead(s); - /* Test if the high part of the operation is dead, but not - the low part. The result can be optimized to a simple - add or sub. This happens often for x86_64 guest when the - cpu mode is set to 32 bit. */ - if (arg_temp(op->args[1])->state == TS_DEAD) { - if (arg_temp(op->args[0])->state == TS_DEAD) { - goto do_remove; - } - /* Replace the opcode and adjust the args in place, - leaving 3 unused args at the end. */ - op->opc = opc = opc_new; - op->args[1] = op->args[2]; - op->args[2] = op->args[4]; - /* Fall through and mark the single-word operation live. */ - } - goto do_not_remove; - case INDEX_op_muls2: opc_new = INDEX_op_mul; opc_new2 = INDEX_op_mulsh; diff --git a/docs/devel/tcg-ops.rst b/docs/devel/tcg-ops.rst index 93bcc70639..a7147407de 100644 --- a/docs/devel/tcg-ops.rst +++ b/docs/devel/tcg-ops.rst @@ -654,14 +654,6 @@ Multiword arithmetic support code generator will use ``tcg_out_set_borrow`` and then the output routine for *subbio*. - * - add2_i32/i64 *t0_low*, *t0_high*, *t1_low*, *t1_high*, *t2_low*, *t2_high* - - sub2_i32/i64 *t0_low*, *t0_high*, *t1_low*, *t1_high*, *t2_low*, *t2_high* - - - | Similar to add/sub, except that the double-word inputs *t1* and *t2* are - formed from two single-word arguments, and the double-word output *t0* - is returned in two single-word outputs. - * - mulu2 *t0_low*, *t0_high*, *t1*, *t2* - | Similar to mul, except two unsigned inputs *t1* and *t2* yielding the full @@ -952,9 +944,9 @@ Assumptions The target word size (``TCG_TARGET_REG_BITS``) is expected to be 32 bit or 64 bit. It is expected that the pointer has the same size as the word. -On a 32 bit target, all 64 bit operations are converted to 32 bits. A -few specific operations must be implemented to allow it (see add2_i32, -sub2_i32, brcond2_i32). +On a 32 bit target, all 64 bit operations are converted to 32 bits. +A few specific operations must be implemented to allow it +(see brcond2_i32, setcond2_i32). On a 64 bit target, the values are transferred between 32 and 64-bit registers using the following ops: