Use explicit casts for ext8s opcodes.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/tci.c | 25 ++++---------------------
 1 file changed, 4 insertions(+), 21 deletions(-)

diff --git a/tcg/tci.c b/tcg/tci.c
index c44a4aec7b..25db479e62 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -57,13 +57,6 @@ static tcg_target_ulong tci_read_reg(const tcg_target_ulong *regs, TCGReg index)
     return regs[index];
 }
 
-#if TCG_TARGET_HAS_ext8s_i32 || TCG_TARGET_HAS_ext8s_i64
-static int8_t tci_read_reg8s(const tcg_target_ulong *regs, TCGReg index)
-{
-    return (int8_t)tci_read_reg(regs, index);
-}
-#endif
-
 #if TCG_TARGET_HAS_ext16s_i32 || TCG_TARGET_HAS_ext16s_i64
 static int16_t tci_read_reg16s(const tcg_target_ulong *regs, TCGReg index)
 {
@@ -164,16 +157,6 @@ tci_read_r(const tcg_target_ulong *regs, const uint8_t **tb_ptr)
     return value;
 }
 
-#if TCG_TARGET_HAS_ext8s_i32 || TCG_TARGET_HAS_ext8s_i64
-/* Read indexed register (8 bit signed) from bytecode. */
-static int8_t tci_read_r8s(const tcg_target_ulong *regs, const uint8_t **tb_ptr)
-{
-    int8_t value = tci_read_reg8s(regs, **tb_ptr);
-    *tb_ptr += 1;
-    return value;
-}
-#endif
-
 /* Read indexed register (16 bit) from bytecode. */
 static uint16_t tci_read_r16(const tcg_target_ulong *regs,
                              const uint8_t **tb_ptr)
@@ -712,8 +695,8 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
 #if TCG_TARGET_HAS_ext8s_i32
         case INDEX_op_ext8s_i32:
             t0 = *tb_ptr++;
-            t1 = tci_read_r8s(regs, &tb_ptr);
-            tci_write_reg(regs, t0, t1);
+            t1 = tci_read_r(regs, &tb_ptr);
+            tci_write_reg(regs, t0, (int8_t)t1);
             break;
 #endif
 #if TCG_TARGET_HAS_ext16s_i32
@@ -927,8 +910,8 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
 #if TCG_TARGET_HAS_ext8s_i64
         case INDEX_op_ext8s_i64:
             t0 = *tb_ptr++;
-            t1 = tci_read_r8s(regs, &tb_ptr);
-            tci_write_reg(regs, t0, t1);
+            t1 = tci_read_r(regs, &tb_ptr);
+            tci_write_reg(regs, t0, (int8_t)t1);
             break;
 #endif
 #if TCG_TARGET_HAS_ext16s_i64
-- 
2.25.1