Re: [PATCH 6/8] target/riscv: Support of compiler's 128-bit integer types

[Richard Henderson]

On 8/30/21 10:16 AM, Frédéric Pétrot wrote:

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 6528b4540e..4321b03b94 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -60,6 +60,19 @@
  #define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2))
  /* To be used on misah, the upper part of misa */
  #define RV128 ((target_ulong)3 << (TARGET_LONG_BITS - 2))
+/*
+ * Defined to force the use of tcg 128-bit arithmetic
+ * if the compiler does not have a 128-bit built-in type
+ */
+#define SOFT_128BIT
+/*
+ * If available and not explicitly disabled,
+ * use compiler's 128-bit integers.
+ */
+#if defined(__SIZEOF_INT128__) && !defined(SOFT_128BIT)
+#define HARD_128BIT
+#endif

This doesn't belong here.  CONFIG_INT128 is more correct.


r~