target/riscv: Introduce mo_endian() helper

mo_endian() returns the target endianness from DisasContext.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20251010155045.78220-13-philmd@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/target/riscv/insn_trans/trans_rva.c.inc b/target/riscv/insn_trans/trans_rva.c.inc
index 8737e8d60d16b28fcd7c8b5d5cb1a7c54bc32231..a7a3278d24238db2d55b23f3991d66fcaf9cd8e6 100644 (file)
--- a/target/riscv/insn_trans/trans_rva.c.inc
+++ b/target/riscv/insn_trans/trans_rva.c.inc
@@ -35,7 +35,7 @@ static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop)
     TCGv src1;
 
     mop |= MO_ALIGN;
-    mop |= MO_TE;
+    mop |= mo_endian(ctx);
 
     decode_save_opc(ctx, 0);
     src1 = get_address(ctx, a->rs1, 0);
@@ -65,7 +65,7 @@ static bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop)
     TCGLabel *l2 = gen_new_label();
 
     mop |= MO_ALIGN;
-    mop |= MO_TE;
+    mop |= mo_endian(ctx);
 
     decode_save_opc(ctx, 0);
     src1 = get_address(ctx, a->rs1, 0);

diff --git a/target/riscv/insn_trans/trans_rvd.c.inc b/target/riscv/insn_trans/trans_rvd.c.inc
index 62b7535815826f45d3fd17276dd4dc8126fdb7df..ffea0c2a1f9ad0ef60421200d9a75763ed13fd95 100644 (file)
--- a/target/riscv/insn_trans/trans_rvd.c.inc
+++ b/target/riscv/insn_trans/trans_rvd.c.inc
@@ -60,7 +60,7 @@ static bool trans_fld(DisasContext *ctx, arg_fld *a)
     } else {
         memop |= MO_ATOM_IFALIGN;
     }
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
 
     decode_save_opc(ctx, 0);
     addr = get_address(ctx, a->rs1, a->imm);
@@ -85,7 +85,7 @@ static bool trans_fsd(DisasContext *ctx, arg_fsd *a)
     } else {
         memop |= MO_ATOM_IFALIGN;
     }
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
 
     decode_save_opc(ctx, 0);
     addr = get_address(ctx, a->rs1, a->imm);

diff --git a/target/riscv/insn_trans/trans_rvf.c.inc b/target/riscv/insn_trans/trans_rvf.c.inc
index 878417eae927c73adad71ff977daff3e18d5b3bf..89fb0f604adc1f2ed09421b7457544dcdc5d573a 100644 (file)
--- a/target/riscv/insn_trans/trans_rvf.c.inc
+++ b/target/riscv/insn_trans/trans_rvf.c.inc
@@ -48,7 +48,7 @@ static bool trans_flw(DisasContext *ctx, arg_flw *a)
     REQUIRE_FPU;
     REQUIRE_EXT(ctx, RVF);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     if (ctx->cfg_ptr->ext_zama16b) {
         memop |= MO_ATOM_WITHIN16;
     }
@@ -71,7 +71,7 @@ static bool trans_fsw(DisasContext *ctx, arg_fsw *a)
     REQUIRE_FPU;
     REQUIRE_EXT(ctx, RVF);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     if (ctx->cfg_ptr->ext_zama16b) {
         memop |= MO_ATOM_WITHIN16;
     }

diff --git a/target/riscv/insn_trans/trans_rvi.c.inc b/target/riscv/insn_trans/trans_rvi.c.inc
index 9a03058f468d6106c8dee26b00dd0fb8f4544cba..54b9b4f2413de72b1845a64af110a7c370bc1841 100644 (file)
--- a/target/riscv/insn_trans/trans_rvi.c.inc
+++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -402,7 +402,7 @@ static bool gen_load(DisasContext *ctx, arg_lb *a, MemOp memop)
 {
     bool out;
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     if (ctx->cfg_ptr->ext_zama16b) {
         memop |= MO_ATOM_WITHIN16;
     }
@@ -504,7 +504,7 @@ static bool gen_store_i128(DisasContext *ctx, arg_sb *a, MemOp memop)
 
 static bool gen_store(DisasContext *ctx, arg_sb *a, MemOp memop)
 {
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     if (ctx->cfg_ptr->ext_zama16b) {
         memop |= MO_ATOM_WITHIN16;
     }

diff --git a/target/riscv/insn_trans/trans_rvzacas.c.inc b/target/riscv/insn_trans/trans_rvzacas.c.inc
index 6458ac4f2411e08d531fc92b8f31fb39fd33fcce..8d94b83ce944d845bb642e63b1f79b4a71501d13 100644 (file)
--- a/target/riscv/insn_trans/trans_rvzacas.c.inc
+++ b/target/riscv/insn_trans/trans_rvzacas.c.inc
@@ -76,7 +76,7 @@ static bool gen_cmpxchg64(DisasContext *ctx, arg_atomic *a, MemOp mop)
     TCGv src1 = get_address(ctx, a->rs1, 0);
     TCGv_i64 src2 = get_gpr_pair(ctx, a->rs2);
 
-    mop |= MO_TE;
+    mop |= mo_endian(ctx);
     decode_save_opc(ctx, RISCV_UW2_ALWAYS_STORE_AMO);
     tcg_gen_atomic_cmpxchg_i64(dest, src1, dest, src2, ctx->mem_idx, mop);
 
@@ -121,7 +121,7 @@ static bool trans_amocas_q(DisasContext *ctx, arg_amocas_q *a)
     TCGv_i64 desth = get_gpr(ctx, a->rd == 0 ? 0 : a->rd + 1, EXT_NONE);
     MemOp memop = MO_ALIGN | MO_UO;
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_concat_i64_i128(src2, src2l, src2h);
     tcg_gen_concat_i64_i128(dest, destl, desth);
     decode_save_opc(ctx, RISCV_UW2_ALWAYS_STORE_AMO);

diff --git a/target/riscv/insn_trans/trans_rvzce.c.inc b/target/riscv/insn_trans/trans_rvzce.c.inc
index 172c2c19c175c1c6c46a3428e97763382e4e5b32..0d3ba40e52a6fcf22b30d106f4e3e2e8d68ea84f 100644 (file)
--- a/target/riscv/insn_trans/trans_rvzce.c.inc
+++ b/target/riscv/insn_trans/trans_rvzce.c.inc
@@ -185,7 +185,7 @@ static bool gen_pop(DisasContext *ctx, arg_cmpp *a, bool ret, bool ret_val)
 
     tcg_gen_addi_tl(addr, sp, stack_adj - reg_size);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     for (i = X_Sn + 11; i >= 0; i--) {
         if (reg_bitmap & (1 << i)) {
             TCGv dest = dest_gpr(ctx, i);
@@ -239,7 +239,7 @@ static bool trans_cm_push(DisasContext *ctx, arg_cm_push *a)
 
     tcg_gen_subi_tl(addr, sp, reg_size);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     for (i = X_Sn + 11; i >= 0; i--) {
         if (reg_bitmap & (1 << i)) {
             TCGv val = get_gpr(ctx, i, EXT_NONE);

diff --git a/target/riscv/insn_trans/trans_rvzfh.c.inc b/target/riscv/insn_trans/trans_rvzfh.c.inc
index 5355cd46c3da0c2008832208e307de530007dbaa..791ee51f6524ddd27667313fa84ad9d5eea92304 100644 (file)
--- a/target/riscv/insn_trans/trans_rvzfh.c.inc
+++ b/target/riscv/insn_trans/trans_rvzfh.c.inc
@@ -49,7 +49,7 @@ static bool trans_flh(DisasContext *ctx, arg_flh *a)
     REQUIRE_FPU;
     REQUIRE_ZFHMIN_OR_ZFBFMIN(ctx);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     decode_save_opc(ctx, 0);
     t0 = get_gpr(ctx, a->rs1, EXT_NONE);
     if (a->imm) {
@@ -74,7 +74,7 @@ static bool trans_fsh(DisasContext *ctx, arg_fsh *a)
     REQUIRE_FPU;
     REQUIRE_ZFHMIN_OR_ZFBFMIN(ctx);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     decode_save_opc(ctx, 0);
     t0 = get_gpr(ctx, a->rs1, EXT_NONE);
     if (a->imm) {

diff --git a/target/riscv/insn_trans/trans_rvzicfiss.c.inc b/target/riscv/insn_trans/trans_rvzicfiss.c.inc
index 89eed0075879d397d1f723aa6b8f59565a77c8ef..0b6ad57965cfc8435c51b9a6363731f6cccee9a3 100644 (file)
--- a/target/riscv/insn_trans/trans_rvzicfiss.c.inc
+++ b/target/riscv/insn_trans/trans_rvzicfiss.c.inc
@@ -105,7 +105,7 @@ static bool trans_ssamoswap_w(DisasContext *ctx, arg_amoswap_w *a)
     decode_save_opc(ctx, RISCV_UW2_ALWAYS_STORE_AMO);
     src1 = get_address(ctx, a->rs1, 0);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_atomic_xchg_tl(dest, src1, src2, SS_MMU_INDEX(ctx), memop);
     gen_set_gpr(ctx, a->rd, dest);
     return true;
@@ -135,7 +135,7 @@ static bool trans_ssamoswap_d(DisasContext *ctx, arg_amoswap_w *a)
     decode_save_opc(ctx, RISCV_UW2_ALWAYS_STORE_AMO);
     src1 = get_address(ctx, a->rs1, 0);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_atomic_xchg_tl(dest, src1, src2, SS_MMU_INDEX(ctx), memop);
     gen_set_gpr(ctx, a->rd, dest);
     return true;

diff --git a/target/riscv/insn_trans/trans_xthead.c.inc b/target/riscv/insn_trans/trans_xthead.c.inc
index 2f31842791e3b0610d5262fb214dbb5984c49633..f8b95c6498b60ceaf7e12e4d75dd409f1bf3db86 100644 (file)
--- a/target/riscv/insn_trans/trans_xthead.c.inc
+++ b/target/riscv/insn_trans/trans_xthead.c.inc
@@ -349,7 +349,7 @@ static bool gen_fload_idx(DisasContext *ctx, arg_th_memidx *a, MemOp memop,
     TCGv_i64 rd = cpu_fpr[a->rd];
     TCGv addr = get_th_address_indexed(ctx, a->rs1, a->rs2, a->imm2, zext_offs);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_ld_i64(rd, addr, ctx->mem_idx, memop);
     if ((memop & MO_SIZE) == MO_32) {
         gen_nanbox_s(rd, rd);
@@ -370,7 +370,7 @@ static bool gen_fstore_idx(DisasContext *ctx, arg_th_memidx *a, MemOp memop,
     TCGv_i64 rd = cpu_fpr[a->rd];
     TCGv addr = get_th_address_indexed(ctx, a->rs1, a->rs2, a->imm2, zext_offs);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_st_i64(rd, addr, ctx->mem_idx, memop);
 
     return true;
@@ -570,7 +570,7 @@ static bool gen_load_inc(DisasContext *ctx, arg_th_meminc *a, MemOp memop,
     TCGv rd = dest_gpr(ctx, a->rd);
     TCGv rs1 = get_gpr(ctx, a->rs1, EXT_NONE);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_ld_tl(rd, addr, ctx->mem_idx, memop);
     tcg_gen_addi_tl(rs1, rs1, imm);
     gen_set_gpr(ctx, a->rd, rd);
@@ -591,7 +591,7 @@ static bool gen_store_inc(DisasContext *ctx, arg_th_meminc *a, MemOp memop,
     TCGv data = get_gpr(ctx, a->rd, EXT_NONE);
     TCGv rs1 = get_gpr(ctx, a->rs1, EXT_NONE);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_st_tl(data, addr, ctx->mem_idx, memop);
     tcg_gen_addi_tl(rs1, rs1, imm);
     gen_set_gpr(ctx, a->rs1, rs1);
@@ -747,7 +747,7 @@ static bool gen_load_idx(DisasContext *ctx, arg_th_memidx *a, MemOp memop,
     TCGv rd = dest_gpr(ctx, a->rd);
     TCGv addr = get_th_address_indexed(ctx, a->rs1, a->rs2, a->imm2, zext_offs);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_ld_tl(rd, addr, ctx->mem_idx, memop);
     gen_set_gpr(ctx, a->rd, rd);
 
@@ -765,7 +765,7 @@ static bool gen_store_idx(DisasContext *ctx, arg_th_memidx *a, MemOp memop,
     TCGv data = get_gpr(ctx, a->rd, EXT_NONE);
     TCGv addr = get_th_address_indexed(ctx, a->rs1, a->rs2, a->imm2, zext_offs);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_st_tl(data, addr, ctx->mem_idx, memop);
 
     return true;
@@ -926,7 +926,7 @@ static bool gen_loadpair_tl(DisasContext *ctx, arg_th_pair *a, MemOp memop,
     addr1 = get_address(ctx, a->rs, imm);
     addr2 = get_address(ctx, a->rs, memop_size(memop) + imm);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_ld_tl(t1, addr1, ctx->mem_idx, memop);
     tcg_gen_qemu_ld_tl(t2, addr2, ctx->mem_idx, memop);
     gen_set_gpr(ctx, a->rd1, t1);
@@ -965,7 +965,7 @@ static bool gen_storepair_tl(DisasContext *ctx, arg_th_pair *a, MemOp memop,
     addr1 = get_address(ctx, a->rs, imm);
     addr2 = get_address(ctx, a->rs, memop_size(memop) + imm);
 
-    memop |= MO_TE;
+    memop |= mo_endian(ctx);
     tcg_gen_qemu_st_tl(data1, addr1, ctx->mem_idx, memop);
     tcg_gen_qemu_st_tl(data2, addr2, ctx->mem_idx, memop);
     return true;

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 2e6f39aa02d95f2af5fd7a177141c7cadb8f45d9..e1f4dc5ffd04a607cf92940f656c4f09b578ee71 100644 (file)
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -126,6 +126,18 @@ static inline bool has_ext(DisasContext *ctx, uint32_t ext)
     return ctx->misa_ext & ext;
 }
 
+static inline MemOp mo_endian(DisasContext *ctx)
+{
+    /*
+     * A couple of bits in MSTATUS set the endianness:
+     *  - MSTATUS_UBE (User-mode),
+     *  - MSTATUS_SBE (Supervisor-mode),
+     *  - MSTATUS_MBE (Machine-mode)
+     * but we don't implement that yet.
+     */
+    return MO_TE;
+}
+
 #ifdef TARGET_RISCV32
 #define get_xl(ctx)    MXL_RV32
 #elif defined(CONFIG_USER_ONLY)
@@ -142,7 +154,7 @@ static inline bool has_ext(DisasContext *ctx, uint32_t ext)
 #define get_address_xl(ctx)    ((ctx)->address_xl)
 #endif
 
-#define mxl_memop(ctx) ((get_xl(ctx) + 1) | MO_TE)
+#define mxl_memop(ctx) ((get_xl(ctx) + 1) | mo_endian(ctx))
 
 /* The word size for this machine mode. */
 static inline int __attribute__((unused)) get_xlen(DisasContext *ctx)
@@ -1135,7 +1147,7 @@ static bool gen_amo(DisasContext *ctx, arg_atomic *a,
     TCGv src1, src2 = get_gpr(ctx, a->rs2, EXT_NONE);
     MemOp size = mop & MO_SIZE;
 
-    mop |= MO_TE;
+    mop |= mo_endian(ctx);
     if (ctx->cfg_ptr->ext_zama16b && size >= MO_32) {
         mop |= MO_ATOM_WITHIN16;
     } else {
@@ -1156,7 +1168,7 @@ static bool gen_cmpxchg(DisasContext *ctx, arg_atomic *a, MemOp mop)
     TCGv src1 = get_address(ctx, a->rs1, 0);
     TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE);
 
-    mop |= MO_TE;
+    mop |= mo_endian(ctx);
     decode_save_opc(ctx, RISCV_UW2_ALWAYS_STORE_AMO);
     tcg_gen_atomic_cmpxchg_tl(dest, src1, dest, src2, ctx->mem_idx, mop);