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target/arm: Implement MVE VQABS, VQNEG 

Implement the MVE 1-operand saturating operations VQABS and VQNEG.

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 8be9a25058
commit 398e7cd3cd
4 changed files with 50 additions and 0 deletions
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8
target/arm/helper-mve.h
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@ -76,6 +76,14 @@ DEF_HELPER_FLAGS_3(mve_vnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vfnegs, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vqabsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vqabsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
DEF_HELPER_FLAGS_3(mve_vqabsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
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_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)

3
target/arm/mve.decode
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@ -279,6 +279,9 @@ VABS_fp 1111 1111 1 . 11 .. 01 ... 0 0111 01 . 0 ... 0 @1op
VNEG 1111 1111 1 . 11 .. 01 ... 0 0011 11 . 0 ... 0 @1op
VNEG_fp 1111 1111 1 . 11 .. 01 ... 0 0111 11 . 0 ... 0 @1op
VQABS 1111 1111 1 . 11 .. 00 ... 0 0111 01 . 0 ... 0 @1op
VQNEG 1111 1111 1 . 11 .. 00 ... 0 0111 11 . 0 ... 0 @1op
&vdup qd rt size
# Qd is in the fields usually named Qn
@vdup .... .... . . .. ... . rt:4 .... . . . . .... qd=%qn &vdup

37
target/arm/mve_helper.c
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@ -2200,3 +2200,40 @@ void HELPER(mve_vpsel)(CPUARMState *env, void *vd, void *vn, void *vm)
}
mve_advance_vpt(env);
}
#define DO_1OP_SAT(OP, ESIZE, TYPE, FN) \
void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm) \
{ \
TYPE *d = vd, *m = vm; \
uint16_t mask = mve_element_mask(env); \
unsigned e; \
bool qc = false; \
for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \
bool sat = false; \
mergemask(&d[H##ESIZE(e)], FN(m[H##ESIZE(e)], &sat), mask); \
qc |= sat & mask & 1; \
} \
if (qc) { \
env->vfp.qc[0] = qc; \
} \
mve_advance_vpt(env); \
}
#define DO_VQABS_B(N, SATP) \
do_sat_bhs(DO_ABS((int64_t)N), INT8_MIN, INT8_MAX, SATP)
#define DO_VQABS_H(N, SATP) \
do_sat_bhs(DO_ABS((int64_t)N), INT16_MIN, INT16_MAX, SATP)
#define DO_VQABS_W(N, SATP) \
do_sat_bhs(DO_ABS((int64_t)N), INT32_MIN, INT32_MAX, SATP)
#define DO_VQNEG_B(N, SATP) do_sat_bhs(-(int64_t)N, INT8_MIN, INT8_MAX, SATP)
#define DO_VQNEG_H(N, SATP) do_sat_bhs(-(int64_t)N, INT16_MIN, INT16_MAX, SATP)
#define DO_VQNEG_W(N, SATP) do_sat_bhs(-(int64_t)N, INT32_MIN, INT32_MAX, SATP)
DO_1OP_SAT(vqabsb, 1, int8_t, DO_VQABS_B)
DO_1OP_SAT(vqabsh, 2, int16_t, DO_VQABS_H)
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)

2
target/arm/translate-mve.c
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@ -275,6 +275,8 @@ DO_1OP(VCLZ, vclz)
DO_1OP(VCLS, vcls)
DO_1OP(VABS, vabs)
DO_1OP(VNEG, vneg)
DO_1OP(VQABS, vqabs)
DO_1OP(VQNEG, vqneg)
/* Narrowing moves: only size 0 and 1 are valid */
#define DO_VMOVN(INSN, FN) \