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s390x/tcg: Factor out vec_full_reg_offset() 

We'll use that a lot along with gvec helpers, to calculate the start
address of a vector.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190225200318.16102-5-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2019-02-25 21:03:15 +01:00 committed by Cornelia Huck
parent ffdd8ebb79
commit 27197fec12
1 changed files with 7 additions and 2 deletions
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9
target/s390x/translate.c
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@ -145,13 +145,18 @@ void s390x_translate_init(void)
} }
} }
static inline int vec_full_reg_offset(uint8_t reg)
{
g_assert(reg < 32);
return offsetof(CPUS390XState, vregs[reg][0].d);
}
static inline int vec_reg_offset(uint8_t reg, uint8_t enr, TCGMemOp es) static inline int vec_reg_offset(uint8_t reg, uint8_t enr, TCGMemOp es)
{ {
/* Convert element size (es) - e.g. MO_8 - to bytes */ /* Convert element size (es) - e.g. MO_8 - to bytes */
const uint8_t bytes = 1 << es; const uint8_t bytes = 1 << es;
int offs = enr * bytes; int offs = enr * bytes;
g_assert(reg < 32);
/* /*
* vregs[n][0] is the lowest 8 byte and vregs[n][1] the highest 8 byte * vregs[n][0] is the lowest 8 byte and vregs[n][1] the highest 8 byte
* of the 16 byte vector, on both, little and big endian systems. * of the 16 byte vector, on both, little and big endian systems.
@ -178,7 +183,7 @@ static inline int vec_reg_offset(uint8_t reg, uint8_t enr, TCGMemOp es)
#ifndef HOST_WORDS_BIGENDIAN #ifndef HOST_WORDS_BIGENDIAN
offs ^= (8 - bytes); offs ^= (8 - bytes);
#endif #endif
return offs + offsetof(CPUS390XState, vregs[reg][0].d); return offs + vec_full_reg_offset(reg);
} }
static inline int freg64_offset(uint8_t reg) static inline int freg64_offset(uint8_t reg)