Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20180301' into staging

target-arm queue:
 * update MAINTAINERS for Alistair's new email address
 * add Arm v8.2 FP16 arithmetic extension for linux-user
 * implement display connector emulation for vexpress board
 * xilinx_spips: Enable only two slaves when reading/writing with stripe
 * xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands
 * hw: register: Run post_write hook on reset

# gpg: Signature made Thu 01 Mar 2018 11:22:46 GMT
# gpg:                using RSA key 3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20180301: (42 commits)
  MAINTAINERS: Update my email address
  linux-user: Report AArch64 FP16 support via hwcap bits
  target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU
  arm/translate-a64: add all single op FP16 to handle_fp_1src_half
  arm/translate-a64: implement simd_scalar_three_reg_same_fp16
  arm/translate-a64: add all FP16 ops in simd_scalar_pairwise
  arm/translate-a64: add FP16 FMOV to simd_mod_imm
  arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16
  arm/helper.c: re-factor rsqrte and add rsqrte_f16
  arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 FRECPE
  arm/helper.c: re-factor recpe and add recepe_f16
  arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16
  arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16
  arm/translate-a64: initial decode for simd_two_reg_misc_fp16
  arm/translate-a64: add FP16 x2 ops for simd_indexed
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 37 insertions, 11 deletions

diff --git a/include/exec/helper-head.h b/include/exec/helper-head.h
index e1fd08f2ba..15b6a68de3 100644
--- a/include/exec/helper-head.h
+++ b/include/exec/helper-head.h
@@ -26,6 +26,7 @@
 #define dh_alias_int i32
 #define dh_alias_i64 i64
 #define dh_alias_s64 i64
+#define dh_alias_f16 i32
 #define dh_alias_f32 i32
 #define dh_alias_f64 i64
 #define dh_alias_ptr ptr
@@ -38,6 +39,7 @@
 #define dh_ctype_int int
 #define dh_ctype_i64 uint64_t
 #define dh_ctype_s64 int64_t
+#define dh_ctype_f16 float16
 #define dh_ctype_f32 float32
 #define dh_ctype_f64 float64
 #define dh_ctype_ptr void *
@@ -94,6 +96,7 @@
 #define dh_is_signed_s32 1
 #define dh_is_signed_i64 0
 #define dh_is_signed_s64 1
+#define dh_is_signed_f16 0
 #define dh_is_signed_f32 0
 #define dh_is_signed_f64 0
 #define dh_is_signed_tl  0
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 9b7b5e34e2..27876e711c 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -306,8 +306,11 @@ static inline float16 float16_set_sign(float16 a, int sign)
 }
 
 #define float16_zero make_float16(0)
-#define float16_one make_float16(0x3c00)
 #define float16_half make_float16(0x3800)
+#define float16_one make_float16(0x3c00)
+#define float16_one_point_five make_float16(0x3e00)
+#define float16_two make_float16(0x4000)
+#define float16_three make_float16(0x4200)
 #define float16_infinity make_float16(0x7c00)
 
 /*----------------------------------------------------------------------------
@@ -415,11 +418,13 @@ static inline float32 float32_set_sign(float32 a, int sign)
 }
 
 #define float32_zero make_float32(0)
-#define float32_one make_float32(0x3f800000)
 #define float32_half make_float32(0x3f000000)
+#define float32_one make_float32(0x3f800000)
+#define float32_one_point_five make_float32(0x3fc00000)
+#define float32_two make_float32(0x40000000)
+#define float32_three make_float32(0x40400000)
 #define float32_infinity make_float32(0x7f800000)
 
-
 /*----------------------------------------------------------------------------
 | The pattern for a default generated single-precision NaN.
 *----------------------------------------------------------------------------*/
@@ -526,9 +531,12 @@ static inline float64 float64_set_sign(float64 a, int sign)
 }
 
 #define float64_zero make_float64(0)
+#define float64_half make_float64(0x3fe0000000000000LL)
 #define float64_one make_float64(0x3ff0000000000000LL)
+#define float64_one_point_five make_float64(0x3FF8000000000000ULL)
+#define float64_two make_float64(0x4000000000000000ULL)
+#define float64_three make_float64(0x4008000000000000ULL)
 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
-#define float64_half make_float64(0x3fe0000000000000LL)
 #define float64_infinity make_float64(0x7ff0000000000000LL)
 
 /*----------------------------------------------------------------------------
diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h
index 24e95d0155..d727379b48 100644
--- a/include/hw/i2c/i2c.h
+++ b/include/hw/i2c/i2c.h
@@ -25,8 +25,7 @@ typedef struct I2CSlave I2CSlave;
 #define I2C_SLAVE_GET_CLASS(obj) \
      OBJECT_GET_CLASS(I2CSlaveClass, (obj), TYPE_I2C_SLAVE)
 
-typedef struct I2CSlaveClass
-{
+typedef struct I2CSlaveClass {
     DeviceClass parent_class;
 
     /* Callbacks provided by the device.  */
@@ -50,14 +49,30 @@ typedef struct I2CSlaveClass
     int (*event)(I2CSlave *s, enum i2c_event event);
 } I2CSlaveClass;
 
-struct I2CSlave
-{
+struct I2CSlave {
     DeviceState qdev;
 
     /* Remaining fields for internal use by the I2C code.  */
     uint8_t address;
 };
 
+#define TYPE_I2C_BUS "i2c-bus"
+#define I2C_BUS(obj) OBJECT_CHECK(I2CBus, (obj), TYPE_I2C_BUS)
+
+typedef struct I2CNode I2CNode;
+
+struct I2CNode {
+    I2CSlave *elt;
+    QLIST_ENTRY(I2CNode) next;
+};
+
+struct I2CBus {
+    BusState qbus;
+    QLIST_HEAD(, I2CNode) current_devs;
+    uint8_t saved_address;
+    bool broadcast;
+};
+
 I2CBus *i2c_init_bus(DeviceState *parent, const char *name);
 void i2c_set_slave_address(I2CSlave *dev, uint8_t address);
 int i2c_bus_busy(I2CBus *bus);
diff --git a/include/hw/register.h b/include/hw/register.h
index de2414e6b4..5796584588 100644
--- a/include/hw/register.h
+++ b/include/hw/register.h
@@ -34,7 +34,7 @@ typedef struct RegisterInfoArray RegisterInfoArray;
  * immediately before the actual write. The returned value is what is written,
  * giving the handler a chance to modify the written value.
  * @post_write: Post write callback. Passed the written value. Most write side
- * effects should be implemented here.
+ * effects should be implemented here. This is called during device reset.
  *
  * @post_read: Post read callback. Passes the value that is about to be returned
  * for a read. The return value from this function is what is ultimately read,
@@ -135,8 +135,8 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
                        bool debug);
 
 /**
- * reset a register
- * @reg: register to reset
+ * Resets a register. This will also call the post_write hook if it exists.
+ * @reg: The register to reset.
  */
 
 void register_reset(RegisterInfo *reg);