target/*/cpu.h: remove softfloat.h

As cpu.h is another typically widely included file which doesn't need
full access to the softfloat API we can remove the includes from here
as well. Where they do need types it's typically for float_status and
the rounding modes so we move that to softfloat-types.h as well.

As a result of not having softfloat in every cpu.h call we now need to
add it to various helpers that do need the full softfloat.h
definitions.

Backports commit 24f91e81b65fcdd0552d1f0fcb0ea7cfe3829c19 from qemu

qemu/include/fpu/softfloat-types.h

@@ -84,6 +84,12 @@ this code that are retained.
  * Software IEC/IEEE floating-point types.
  */
 
+/* This 'flag' type must be able to hold at least 0 and 1. It should
+ * probably be replaced with 'bool' but the uses would need to be audited
+ * to check that they weren't accidentally relying on it being a larger type.
+ */
+typedef uint8_t flag;
+
 typedef uint16_t float16;
 typedef uint32_t float32;
 typedef uint64_t float64;
@@ -112,4 +118,62 @@ typedef struct {
 #define make_float128(high_, low_) ((float128) { .high = high_, .low = low_ })
 #define make_float128_init(high_, low_) { .high = high_, .low = low_ }
 
+/*
+ * Software IEC/IEEE floating-point underflow tininess-detection mode.
+ */
+
+enum {
+    float_tininess_after_rounding  = 0,
+    float_tininess_before_rounding = 1
+};
+
+/*
+ *Software IEC/IEEE floating-point rounding mode.
+ */
+
+enum {
+    float_round_nearest_even = 0,
+    float_round_down         = 1,
+    float_round_up           = 2,
+    float_round_to_zero      = 3,
+    float_round_ties_away    = 4,
+    /* Not an IEEE rounding mode: round to the closest odd mantissa value */
+    float_round_to_odd       = 5,
+};
+
+/*
+ * Software IEC/IEEE floating-point exception flags.
+ */
+
+enum {
+    float_flag_invalid   =  1,
+    float_flag_divbyzero =  4,
+    float_flag_overflow  =  8,
+    float_flag_underflow = 16,
+    float_flag_inexact   = 32,
+    float_flag_input_denormal = 64,
+    float_flag_output_denormal = 128
+};
+
+
+/*
+ * Floating Point Status. Individual architectures may maintain
+ * several versions of float_status for different functions. The
+ * correct status for the operation is then passed by reference to
+ * most of the softfloat functions.
+ */
+
+typedef struct float_status {
+    signed char float_detect_tininess;
+    signed char float_rounding_mode;
+    uint8_t     float_exception_flags;
+    signed char floatx80_rounding_precision;
+    /* should denormalised results go to zero and set the inexact flag? */
+    flag flush_to_zero;
+    /* should denormalised inputs go to zero and set the input_denormal flag? */
+    flag flush_inputs_to_zero;
+    flag default_nan_mode;
+    flag snan_bit_is_one;
+} float_status;
+
 #endif /* SOFTFLOAT_TYPES_H */

qemu/include/fpu/softfloat.h

@@ -90,12 +90,6 @@ this code that are retained.
 #include "config-host.h"
 #include "qemu/osdep.h"
 
-/* This 'flag' type must be able to hold at least 0 and 1. It should
- * probably be replaced with 'bool' but the uses would need to be audited
- * to check that they weren't accidentally relying on it being a larger type.
- */
-typedef uint8_t flag;
-
 #define LIT64( a ) a##LL
 
 /*----------------------------------------------------------------------------
@@ -110,53 +104,6 @@ enum {
 
 #include "fpu/softfloat-types.h"
 
-/*----------------------------------------------------------------------------
-| Software IEC/IEEE floating-point underflow tininess-detection mode.
-*----------------------------------------------------------------------------*/
-enum {
-    float_tininess_after_rounding  = 0,
-    float_tininess_before_rounding = 1
-};
-
-/*----------------------------------------------------------------------------
-| Software IEC/IEEE floating-point rounding mode.
-*----------------------------------------------------------------------------*/
-enum {
-    float_round_nearest_even = 0,
-    float_round_down         = 1,
-    float_round_up           = 2,
-    float_round_to_zero      = 3,
-    float_round_ties_away    = 4,
-    /* Not an IEEE rounding mode: round to the closest odd mantissa value */
-    float_round_to_odd       = 5,
-};
-
-/*----------------------------------------------------------------------------
-| Software IEC/IEEE floating-point exception flags.
-*----------------------------------------------------------------------------*/
-enum {
-    float_flag_invalid   =  1,
-    float_flag_divbyzero =  4,
-    float_flag_overflow  =  8,
-    float_flag_underflow = 16,
-    float_flag_inexact   = 32,
-    float_flag_input_denormal = 64,
-    float_flag_output_denormal = 128
-};
-
-typedef struct float_status {
-    signed char float_detect_tininess;
-    signed char float_rounding_mode;
-    uint8_t     float_exception_flags;
-    signed char floatx80_rounding_precision;
-    /* should denormalised results go to zero and set the inexact flag? */
-    flag flush_to_zero;
-    /* should denormalised inputs go to zero and set the input_denormal flag? */
-    flag flush_inputs_to_zero;
-    flag default_nan_mode;
-    flag snan_bit_is_one;
-} float_status;
-
 static inline void set_float_detect_tininess(int val, float_status *status)
 {
     status->float_detect_tininess = val;

qemu/target/arm/cpu.c

@@ -27,6 +27,7 @@
 #include "qapi/qmp/qerror.h"
 #include "hw/arm/arm.h"
 #include "sysemu/sysemu.h"
+#include "fpu/softfloat.h"
 
 #include "uc_priv.h"
 

qemu/target/arm/cpu.h

@@ -43,8 +43,6 @@
 #include "cpu-qom.h"
 #include "exec/cpu-defs.h"
 
-#include "fpu/softfloat.h"
-
 #define EXCP_UDEF            1   /* undefined instruction */
 #define EXCP_SWI             2   /* software interrupt */
 #define EXCP_PREFETCH_ABORT  3

qemu/target/arm/helper-a64.c

@@ -30,6 +30,7 @@
 #include "exec/cpu_ldst.h"
 #include "qemu/int128.h"
 #include "tcg.h"
+#include "fpu/softfloat.h"
 
 /* C2.4.7 Multiply and divide */
 /* special cases for 0 and LLONG_MIN are mandated by the standard */

qemu/target/arm/helper.c

@@ -9,6 +9,7 @@
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
 #include "arm_ldst.h"
+#include "fpu/softfloat.h"
 
 #ifndef CONFIG_USER_ONLY
 /* Cacheability and shareability attributes for a memory access */

qemu/target/arm/neon_helper.c

@@ -11,6 +11,7 @@
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"
+#include "fpu/softfloat.h"
 
 #define SIGNBIT (uint32_t)0x80000000
 #define SIGNBIT64 ((uint64_t)1 << 63)

qemu/target/i386/cpu.h

@@ -52,10 +52,6 @@
 
 #include "exec/cpu-defs.h"
 
-#ifdef CONFIG_TCG
-#include "fpu/softfloat.h"
-#endif
-
 #define R_EAX 0
 #define R_ECX 1
 #define R_EDX 2

qemu/target/i386/fpu_helper.c

@@ -24,6 +24,7 @@
 #include "qemu/host-utils.h"
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
+#include "fpu/softfloat.h"
 
 #define FPU_RC_MASK         0xc00
 #define FPU_RC_NEAR         0x000

qemu/target/m68k/cpu.c

@@ -24,7 +24,7 @@
 #include "cpu.h"
 #include "qemu-common.h"
 #include "exec/exec-all.h"
-
+#include "fpu/softfloat.h"
 
 static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
 {

qemu/target/m68k/cpu.h

@@ -30,8 +30,6 @@
 #include "cpu-qom.h"
 #include "exec/cpu-defs.h"
 
-#include "fpu/softfloat.h"
-
 #define OS_BYTE     0
 #define OS_WORD     1
 #define OS_LONG     2

qemu/target/m68k/fpu_helper.c

@@ -23,6 +23,7 @@
 #include "exec/helper-proto.h"
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
+#include "fpu/softfloat.h"
 
 /* Undefined offsets may be different on various FPU.
  * On 68040 they return 0.0 (floatx80_zero)

qemu/target/m68k/helper.c

@@ -23,6 +23,7 @@
 #include "exec/exec-all.h"
 
 #include "exec/helper-proto.h"
+#include "fpu/softfloat.h"
 
 #define SIGNBIT (1u << 31)
 

qemu/target/m68k/translate.c

@@ -30,6 +30,7 @@
 #include "exec/helper-gen.h"
 
 #include "exec/gen-icount.h"
+#include "fpu/softfloat.h"
 
 //#define DEBUG_DISPATCH 1
 

qemu/target/sparc/cpu.h

@@ -30,8 +30,6 @@
 
 #include "exec/cpu-defs.h"
 
-#include "fpu/softfloat.h"
-
 /*#define EXCP_INTERRUPT 0x100*/
 
 /* trap definitions */

qemu/target/sparc/fop_helper.c

@@ -21,6 +21,7 @@
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"
+#include "fpu/softfloat.h"
 
 #define QT0 (env->qt0)
 #define QT1 (env->qt1)