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target/arm: Implement MVE VMLA 

Implement the MVE VMLA insn, which multiplies a vector by a scalar
and accumulates into another 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 17:11:54 +01:00
parent f0ffff5163
commit c69e34c6de
4 changed files with 11 additions and 0 deletions
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4
target/arm/helper-mve.h
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@ -367,6 +367,10 @@ DEF_HELPER_FLAGS_4(mve_vqdmullb_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i3
DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlab, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlah, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlaw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlasb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlash, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(mve_vmlasw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)

1
target/arm/mve.decode
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@ -413,6 +413,7 @@ VQDMULH_scalar 1110 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
VQRDMULH_scalar 1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
# The U bit (28) is don't-care because it does not affect the result
VMLA 111- 1110 0 . .. ... 1 ... 0 1110 . 100 .... @2scalar
VMLAS 111- 1110 0 . .. ... 1 ... 1 1110 . 100 .... @2scalar
# Vector add across vector

5
target/arm/mve_helper.c
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@ -1008,6 +1008,11 @@ DO_2OP_SAT_SCALAR(vqrdmulh_scalarb, 1, int8_t, DO_QRDMULH_B)
DO_2OP_SAT_SCALAR(vqrdmulh_scalarh, 2, int16_t, DO_QRDMULH_H)
DO_2OP_SAT_SCALAR(vqrdmulh_scalarw, 4, int32_t, DO_QRDMULH_W)
/* Vector by scalar plus vector */
#define DO_VMLA(D, N, M) ((N) * (M) + (D))
DO_2OP_ACC_SCALAR_U(vmla, DO_VMLA)
/* Vector by vector plus scalar */
#define DO_VMLAS(D, N, M) ((N) * (D) + (M))

1
target/arm/translate-mve.c
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@ -620,6 +620,7 @@ DO_2OP_SCALAR(VQSUB_U_scalar, vqsubu_scalar)
DO_2OP_SCALAR(VQDMULH_scalar, vqdmulh_scalar)
DO_2OP_SCALAR(VQRDMULH_scalar, vqrdmulh_scalar)
DO_2OP_SCALAR(VBRSR, vbrsr)
DO_2OP_SCALAR(VMLA, vmla)
DO_2OP_SCALAR(VMLAS, vmlas)
static bool trans_VQDMULLB_scalar(DisasContext *s, arg_2scalar *a)