Merge tag 'pull-tcg-20230502-2' of https://gitlab.com/rth7680/qemu into staging

Misc tcg-related patch queue.

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# gpg: Signature made Tue 02 May 2023 09:15:57 PM BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* tag 'pull-tcg-20230502-2' of https://gitlab.com/rth7680/qemu:
  tcg: Introduce tcg_out_movext2
  tcg/mips: Conditionalize tcg_out_exts_i32_i64
  tcg/loongarch64: Conditionalize tcg_out_exts_i32_i64
  accel/tcg: Add cpu_ld*_code_mmu
  migration/xbzrle: Use __attribute__((target)) for avx512
  qemu/int128: Re-shuffle Int128Alias members
  tcg: Add tcg_gen_gvec_rotrs
  tcg: Add tcg_gen_gvec_andcs
  qemu/host-utils.h: Add clz and ctz functions for lower-bit integers
  qemu/bitops.h: Limit rotate amounts
  accel/tcg: Uncache the host address for instruction fetch when tlb size < 1
  softmmu: Tidy dirtylimit_dirty_ring_full_time

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 64 insertions, 10 deletions

diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 03213ce..cb3526d 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -218,7 +218,7 @@ static inline unsigned long find_first_zero_bit(const unsigned long *addr,
  */
 static inline uint8_t rol8(uint8_t word, unsigned int shift)
 {
-    return (word << shift) | (word >> ((8 - shift) & 7));
+    return (word << (shift & 7)) | (word >> (-shift & 7));
 }
 
 /**
@@ -228,7 +228,7 @@ static inline uint8_t rol8(uint8_t word, unsigned int shift)
  */
 static inline uint8_t ror8(uint8_t word, unsigned int shift)
 {
-    return (word >> shift) | (word << ((8 - shift) & 7));
+    return (word >> (shift & 7)) | (word << (-shift & 7));
 }
 
 /**
@@ -238,7 +238,7 @@ static inline uint8_t ror8(uint8_t word, unsigned int shift)
  */
 static inline uint16_t rol16(uint16_t word, unsigned int shift)
 {
-    return (word << shift) | (word >> ((16 - shift) & 15));
+    return (word << (shift & 15)) | (word >> (-shift & 15));
 }
 
 /**
@@ -248,7 +248,7 @@ static inline uint16_t rol16(uint16_t word, unsigned int shift)
  */
 static inline uint16_t ror16(uint16_t word, unsigned int shift)
 {
-    return (word >> shift) | (word << ((16 - shift) & 15));
+    return (word >> (shift & 15)) | (word << (-shift & 15));
 }
 
 /**
@@ -258,7 +258,7 @@ static inline uint16_t ror16(uint16_t word, unsigned int shift)
  */
 static inline uint32_t rol32(uint32_t word, unsigned int shift)
 {
-    return (word << shift) | (word >> ((32 - shift) & 31));
+    return (word << (shift & 31)) | (word >> (-shift & 31));
 }
 
 /**
@@ -268,7 +268,7 @@ static inline uint32_t rol32(uint32_t word, unsigned int shift)
  */
 static inline uint32_t ror32(uint32_t word, unsigned int shift)
 {
-    return (word >> shift) | (word << ((32 - shift) & 31));
+    return (word >> (shift & 31)) | (word << (-shift & 31));
 }
 
 /**
@@ -278,7 +278,7 @@ static inline uint32_t ror32(uint32_t word, unsigned int shift)
  */
 static inline uint64_t rol64(uint64_t word, unsigned int shift)
 {
-    return (word << shift) | (word >> ((64 - shift) & 63));
+    return (word << (shift & 63)) | (word >> (-shift & 63));
 }
 
 /**
@@ -288,7 +288,7 @@ static inline uint64_t rol64(uint64_t word, unsigned int shift)
  */
 static inline uint64_t ror64(uint64_t word, unsigned int shift)
 {
-    return (word >> shift) | (word << ((64 - shift) & 63));
+    return (word >> (shift & 63)) | (word << (-shift & 63));
 }
 
 /**
diff --git a/include/qemu/host-utils.h b/include/qemu/host-utils.h
index 3ce62bf..d3b4dce 100644
--- a/include/qemu/host-utils.h
+++ b/include/qemu/host-utils.h
@@ -108,6 +108,36 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 #endif
 
 /**
+ * clz8 - count leading zeros in a 8-bit value.
+ * @val: The value to search
+ *
+ * Returns 8 if the value is zero.  Note that the GCC builtin is
+ * undefined if the value is zero.
+ *
+ * Note that the GCC builtin will upcast its argument to an `unsigned int`
+ * so this function subtracts off the number of prepended zeroes.
+ */
+static inline int clz8(uint8_t val)
+{
+    return val ? __builtin_clz(val) - 24 : 8;
+}
+
+/**
+ * clz16 - count leading zeros in a 16-bit value.
+ * @val: The value to search
+ *
+ * Returns 16 if the value is zero.  Note that the GCC builtin is
+ * undefined if the value is zero.
+ *
+ * Note that the GCC builtin will upcast its argument to an `unsigned int`
+ * so this function subtracts off the number of prepended zeroes.
+ */
+static inline int clz16(uint16_t val)
+{
+    return val ? __builtin_clz(val) - 16 : 16;
+}
+
+/**
  * clz32 - count leading zeros in a 32-bit value.
  * @val: The value to search
  *
@@ -154,6 +184,30 @@ static inline int clo64(uint64_t val)
 }
 
 /**
+ * ctz8 - count trailing zeros in a 8-bit value.
+ * @val: The value to search
+ *
+ * Returns 8 if the value is zero.  Note that the GCC builtin is
+ * undefined if the value is zero.
+ */
+static inline int ctz8(uint8_t val)
+{
+    return val ? __builtin_ctz(val) : 8;
+}
+
+/**
+ * ctz16 - count trailing zeros in a 16-bit value.
+ * @val: The value to search
+ *
+ * Returns 16 if the value is zero.  Note that the GCC builtin is
+ * undefined if the value is zero.
+ */
+static inline int ctz16(uint16_t val)
+{
+    return val ? __builtin_ctz(val) : 16;
+}
+
+/**
  * ctz32 - count trailing zeros in a 32-bit value.
  * @val: The value to search
  *
diff --git a/include/qemu/int128.h b/include/qemu/int128.h
index f62a46b..9e46cfae 100644
--- a/include/qemu/int128.h
+++ b/include/qemu/int128.h
@@ -483,9 +483,9 @@ static inline void bswap128s(Int128 *s)
  */
 #ifdef CONFIG_INT128
 typedef union {
-    Int128 s;
-    __int128_t i;
     __uint128_t u;
+    __int128_t i;
+    Int128 s;
 } Int128Alias __attribute__((transparent_union));
 #else
 typedef Int128 Int128Alias;