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s390/fpu: let fpu_vlm() and fpu_vstm() return number of registers

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Let fpu_vlm() and fpu_vstm() macros return the number of registers saved /
loaded. This is helpful to read easy to read code in case there are several
subsequent fpu_vlm() or fpu_vstm() calls:

	__vector128 *vxrs = ....

	vxrs += fpu_vstm(0, 15, vxrs);
	vxrs += fpu_vstm(16, 31, vxrs);

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-02-03 11:45:16 +01:00
parent bdbd3acb33
commit cad8c3abaa
1 changed files with 16 additions and 8 deletions
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24
arch/s390/include/asm/fpu-insn.h
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@ -110,7 +110,8 @@ static __always_inline void fpu_stfpc(unsigned int *fpc)
#ifdef CONFIG_CC_IS_CLANG
#define fpu_vlm(_v1, _v3, _vxrs) do { \
#define fpu_vlm(_v1, _v3, _vxrs) \
({ \
unsigned int size = ((_v3) - (_v1) + 1) * sizeof(__vector128); \
struct { \
__vector128 _v[(_v3) - (_v1) + 1]; \
@ -124,11 +125,13 @@ static __always_inline void fpu_stfpc(unsigned int *fpc)
: [vxrs] "R" (*_v), \
[v1] "I" (_v1), [v3] "I" (_v3) \
: "memory", "1"); \
} while (0)
(_v3) - (_v1) + 1; \
})
#else /* CONFIG_CC_IS_CLANG */
#define fpu_vlm(_v1, _v3, _vxrs) do { \
#define fpu_vlm(_v1, _v3, _vxrs) \
({ \
unsigned int size = ((_v3) - (_v1) + 1) * sizeof(__vector128); \
struct { \
__vector128 _v[(_v3) - (_v1) + 1]; \
@ -140,13 +143,15 @@ static __always_inline void fpu_stfpc(unsigned int *fpc)
: [vxrs] "Q" (*_v), \
[v1] "I" (_v1), [v3] "I" (_v3) \
: "memory"); \
} while (0)
(_v3) - (_v1) + 1; \
})
#endif /* CONFIG_CC_IS_CLANG */
#ifdef CONFIG_CC_IS_CLANG
#define fpu_vstm(_v1, _v3, _vxrs) do { \
#define fpu_vstm(_v1, _v3, _vxrs) \
({ \
unsigned int size = ((_v3) - (_v1) + 1) * sizeof(__vector128); \
struct { \
__vector128 _v[(_v3) - (_v1) + 1]; \
@ -159,11 +164,13 @@ static __always_inline void fpu_stfpc(unsigned int *fpc)
: [vxrs] "=R" (*_v) \
: [v1] "I" (_v1), [v3] "I" (_v3) \
: "memory", "1"); \
} while (0)
(_v3) - (_v1) + 1; \
})
#else /* CONFIG_CC_IS_CLANG */
#define fpu_vstm(_v1, _v3, _vxrs) do { \
#define fpu_vstm(_v1, _v3, _vxrs) \
({ \
unsigned int size = ((_v3) - (_v1) + 1) * sizeof(__vector128); \
struct { \
__vector128 _v[(_v3) - (_v1) + 1]; \
@ -174,7 +181,8 @@ static __always_inline void fpu_stfpc(unsigned int *fpc)
: [vxrs] "=Q" (*_v) \
: [v1] "I" (_v1), [v3] "I" (_v3) \
: "memory"); \
} while (0)
(_v3) - (_v1) + 1; \
})
#endif /* CONFIG_CC_IS_CLANG */