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fpu: Use plain 'int' rather than 'int_fast16_t' for shift counts

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Use the plain 'int' type rather than 'int_fast16_t' for shift counts
in the various shift related functions, since we don't actually care
about the size of the integer at all here, and using int16_t would
be confusing.

This should be a safe change because int_fast16_t semantics
permit use of 'int' (and on 32-bit glibc that is what you get).

Backports commit 07d792d2b08669bf6a97cbf590496078c4621068 from qemu
This commit is contained in:
Peter Maydell 2018-02-20 17:01:14 -05:00 committed by Lioncash
parent 68cbe1b2ce
commit 9d0463feed
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 32 additions and 20 deletions
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16
qemu/fpu/softfloat-macros.h
View file

@ -99,7 +99,7 @@ this code that are retained.
| The result is stored in the location pointed to by `zPtr'.
*----------------------------------------------------------------------------*/
static inline void shift32RightJamming(uint32_t a, int_fast16_t count, uint32_t *zPtr)
static inline void shift32RightJamming(uint32_t a, int count, uint32_t *zPtr)
{
uint32_t z;
@ -125,7 +125,7 @@ static inline void shift32RightJamming(uint32_t a, int_fast16_t count, uint32_t
| The result is stored in the location pointed to by `zPtr'.
*----------------------------------------------------------------------------*/
static inline void shift64RightJamming(uint64_t a, int_fast16_t count, uint64_t *zPtr)
static inline void shift64RightJamming(uint64_t a, int count, uint64_t *zPtr)
{
uint64_t z;
@ -161,7 +161,7 @@ static inline void shift64RightJamming(uint64_t a, int_fast16_t count, uint64_t
static inline void
shift64ExtraRightJamming(
uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
uint64_t a0, uint64_t a1, int count, uint64_t *z0Ptr, uint64_t *z1Ptr)
{
uint64_t z0, z1;
int8_t negCount = ( - count ) & 63;
@ -198,7 +198,7 @@ static inline void
static inline void
shift128Right(
uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
uint64_t a0, uint64_t a1, int count, uint64_t *z0Ptr, uint64_t *z1Ptr)
{
uint64_t z0, z1;
int8_t negCount = ( - count ) & 63;
@ -233,7 +233,7 @@ static inline void
static inline void
shift128RightJamming(
uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
uint64_t a0, uint64_t a1, int count, uint64_t *z0Ptr, uint64_t *z1Ptr)
{
uint64_t z0, z1;
int8_t negCount = ( - count ) & 63;
@ -287,7 +287,7 @@ static inline void
uint64_t a0,
uint64_t a1,
uint64_t a2,
int_fast16_t count,
int count,
uint64_t *z0Ptr,
uint64_t *z1Ptr,
uint64_t *z2Ptr
@ -342,7 +342,7 @@ static inline void
static inline void
shortShift128Left(
uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
uint64_t a0, uint64_t a1, int count, uint64_t *z0Ptr, uint64_t *z1Ptr)
{
*z1Ptr = a1<<count;
@ -364,7 +364,7 @@ static inline void
uint64_t a0,
uint64_t a1,
uint64_t a2,
int_fast16_t count,
int count,
uint64_t *z0Ptr,
uint64_t *z1Ptr,
uint64_t *z2Ptr

36
qemu/fpu/softfloat.c
View file

@ -1517,7 +1517,8 @@ float128 uint64_to_float128(uint64_t a, float_status *status)
int32_t float32_to_int32( float32 a, float_status *status)
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
uint64_t aSig64;
@ -1548,7 +1549,8 @@ int32_t float32_to_int32( float32 a, float_status *status)
int32_t float32_to_int32_round_to_zero( float32 a, float_status *status)
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
int32_t z;
a = float32_squash_input_denormal(a, status);
@ -1591,7 +1593,8 @@ int32_t float32_to_int32_round_to_zero( float32 a, float_status *status)
int16_t float32_to_int16_round_to_zero(float32 a, float_status *status)
{
flag aSign;
int16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
int32_t z;
@ -1640,7 +1643,8 @@ int16_t float32_to_int16_round_to_zero(float32 a, float_status *status)
int64_t float32_to_int64( float32 a, float_status *status)
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
uint64_t aSig64, aSigExtra;
a = float32_squash_input_denormal(a, status);
@ -1679,7 +1683,8 @@ int64_t float32_to_int64( float32 a, float_status *status)
uint64_t float32_to_uint64(float32 a, float_status *status)
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
uint64_t aSig64, aSigExtra;
a = float32_squash_input_denormal(a, status);
@ -1744,7 +1749,8 @@ uint64_t float32_to_uint64_round_to_zero(float32 a, float_status *status)
int64_t float32_to_int64_round_to_zero( float32 a, float_status *status)
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint32_t aSig;
uint64_t aSig64;
int64_t z;
@ -3040,7 +3046,8 @@ int float32_unordered_quiet( float32 a, float32 b, float_status *status )
int32_t float64_to_int32( float64 a, float_status *status )
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig;
a = float64_squash_input_denormal(a, status);
@ -3068,7 +3075,8 @@ int32_t float64_to_int32( float64 a, float_status *status )
int32_t float64_to_int32_round_to_zero( float64 a, float_status *status )
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig, savedASig;
int32_t z;
a = float64_squash_input_denormal(a, status);
@ -3117,7 +3125,8 @@ int32_t float64_to_int32_round_to_zero( float64 a, float_status *status )
int16_t float64_to_int16_round_to_zero(float64 a, float_status *status)
{
flag aSign;
int16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig, savedASig;
int32_t z;
@ -3168,7 +3177,8 @@ int16_t float64_to_int16_round_to_zero(float64 a, float_status *status)
int64_t float64_to_int64( float64 a, float_status *status )
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig, aSigExtra;
a = float64_squash_input_denormal(a, status);
@ -3211,7 +3221,8 @@ int64_t float64_to_int64( float64 a, float_status *status )
int64_t float64_to_int64_round_to_zero( float64 a, float_status *status )
{
flag aSign;
int_fast16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig;
int64_t z;
a = float64_squash_input_denormal(a, status);
@ -7284,7 +7295,8 @@ uint16_t float64_to_uint16_round_to_zero(float64 a, float_status *status)
uint64_t float64_to_uint64(float64 a, float_status *status)
{
flag aSign;
int16_t aExp, shiftCount;
int_fast16_t aExp;
int shiftCount;
uint64_t aSig, aSigExtra;
a = float64_squash_input_denormal(a, status);