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target/arm: Implement MVE VMAXA, VMINA

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Implement the MVE VMAXA and VMINA insns, which take the absolute
value of the signed elements in the input vector and then accumulate
the unsigned max or min into the destination vector.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2021-08-13 17:11:55 +01:00
parent 398e7cd3cd
commit d5c571ea6d
4 changed files with 40 additions and 0 deletions
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8
target/arm/helper-mve.h
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@ -84,6 +84,14 @@ DEF_HELPER_FLAGS_3(mve_vqnegb, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vqnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vqnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmaxab, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmaxah, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmaxaw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vminab, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vminah, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vminaw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmovnbb, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmovnbh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vmovntb, TCG_CALL_NO_WG, void, env, ptr, ptr)

4
target/arm/mve.decode
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@ -156,6 +156,8 @@ VMUL 1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
VQMOVUNB 111 0 1110 0 . 11 .. 01 ... 0 1110 1 0 . 0 ... 1 @1op
VQMOVN_BS 111 0 1110 0 . 11 .. 11 ... 0 1110 0 0 . 0 ... 1 @1op
VMAXA 111 0 1110 0 . 11 .. 11 ... 0 1110 1 0 . 0 ... 1 @1op
VMULH_S 111 0 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
}
@ -176,6 +178,8 @@ VMUL 1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
VQMOVUNT 111 0 1110 0 . 11 .. 01 ... 1 1110 1 0 . 0 ... 1 @1op
VQMOVN_TS 111 0 1110 0 . 11 .. 11 ... 1 1110 0 0 . 0 ... 1 @1op
VMINA 111 0 1110 0 . 11 .. 11 ... 1 1110 1 0 . 0 ... 1 @1op
VRMULH_S 111 0 1110 0 . .. ...1 ... 1 1110 . 0 . 0 ... 1 @2op
}

26
target/arm/mve_helper.c
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@ -2237,3 +2237,29 @@ DO_1OP_SAT(vqabsw, 4, int32_t, DO_VQABS_W)
DO_1OP_SAT(vqnegb, 1, int8_t, DO_VQNEG_B)
DO_1OP_SAT(vqnegh, 2, int16_t, DO_VQNEG_H)
DO_1OP_SAT(vqnegw, 4, int32_t, DO_VQNEG_W)
/*
* VMAXA, VMINA: vd is unsigned; vm is signed, and we take its
* absolute value; we then do an unsigned comparison.
*/
#define DO_VMAXMINA(OP, ESIZE, STYPE, UTYPE, FN) \
void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm) \
{ \
UTYPE *d = vd; \
STYPE *m = vm; \
uint16_t mask = mve_element_mask(env); \
unsigned e; \
for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \
UTYPE r = DO_ABS(m[H##ESIZE(e)]); \
r = FN(d[H##ESIZE(e)], r); \
mergemask(&d[H##ESIZE(e)], r, mask); \
} \
mve_advance_vpt(env); \
}
DO_VMAXMINA(vmaxab, 1, int8_t, uint8_t, DO_MAX)
DO_VMAXMINA(vmaxah, 2, int16_t, uint16_t, DO_MAX)
DO_VMAXMINA(vmaxaw, 4, int32_t, uint32_t, DO_MAX)
DO_VMAXMINA(vminab, 1, int8_t, uint8_t, DO_MIN)
DO_VMAXMINA(vminah, 2, int16_t, uint16_t, DO_MIN)
DO_VMAXMINA(vminaw, 4, int32_t, uint32_t, DO_MIN)

2
target/arm/translate-mve.c
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@ -277,6 +277,8 @@ DO_1OP(VABS, vabs)
DO_1OP(VNEG, vneg)
DO_1OP(VQABS, vqabs)
DO_1OP(VQNEG, vqneg)
DO_1OP(VMAXA, vmaxa)
DO_1OP(VMINA, vmina)
/* Narrowing moves: only size 0 and 1 are valid */
#define DO_VMOVN(INSN, FN) \