target/sparc: use signed denominator in sdiv helper

The result has to be done with the signed denominator (b32) instead of
the unsigned value passed in argument (b).

Cc: [email protected]
Fixes: 1326010 ("target/sparc: Remove CC_OP_DIV")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2319
Signed-off-by: Clément Chigot <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Richard Henderson <[email protected]>

Author: Helflym

target/sparc/helper.c

@@ -121,7 +121,7 @@ uint64_t helper_sdiv(CPUSPARCState *env, target_ulong a, target_ulong b)
         return (uint32_t)(b32 < 0 ? INT32_MAX : INT32_MIN) | (-1ull << 32);
     }
 
-    a64 /= b;
+    a64 /= b32;
     r = a64;
     if (unlikely(r != a64)) {
         return (uint32_t)(a64 < 0 ? INT32_MIN : INT32_MAX) | (-1ull << 32);