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| author | Peter Maydell <peter.maydell@linaro.org> | 2021-06-17 13:15:57 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-06-21 17:12:50 +0100 |
| commit | ba62cc56e8a0aa84337c50766d499ba4199394df (patch) | |
| tree | e89e6ce9ec949d327bc9f9c46b222bb27af9fb57 /target/arm/mve_helper.c | |
| parent | 9333fe4dd39709ce9898750d517568e5c2fb2e32 (diff) | |
| download | qemu-ba62cc56e8a0aa84337c50766d499ba4199394df.zip qemu-ba62cc56e8a0aa84337c50766d499ba4199394df.tar.gz qemu-ba62cc56e8a0aa84337c50766d499ba4199394df.tar.bz2 | |
target/arm: Implement MVE VMULH
Implement the MVE VMULH insn, which performs a vector
multiply and returns the high half of the result.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210617121628.20116-14-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/mve_helper.c')
| -rw-r--r-- | target/arm/mve_helper.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c index 23da964..f1dd688 100644 --- a/target/arm/mve_helper.c +++ b/target/arm/mve_helper.c @@ -362,3 +362,29 @@ DO_2OP(veor, 8, uint64_t, DO_EOR) DO_2OP_U(vadd, DO_ADD) DO_2OP_U(vsub, DO_SUB) DO_2OP_U(vmul, DO_MUL) + +/* + * Because the computation type is at least twice as large as required, + * these work for both signed and unsigned source types. + */ +static inline uint8_t do_mulh_b(int32_t n, int32_t m) +{ + return (n * m) >> 8; +} + +static inline uint16_t do_mulh_h(int32_t n, int32_t m) +{ + return (n * m) >> 16; +} + +static inline uint32_t do_mulh_w(int64_t n, int64_t m) +{ + return (n * m) >> 32; +} + +DO_2OP(vmulhsb, 1, int8_t, do_mulh_b) +DO_2OP(vmulhsh, 2, int16_t, do_mulh_h) +DO_2OP(vmulhsw, 4, int32_t, do_mulh_w) +DO_2OP(vmulhub, 1, uint8_t, do_mulh_b) +DO_2OP(vmulhuh, 2, uint16_t, do_mulh_h) +DO_2OP(vmulhuw, 4, uint32_t, do_mulh_w) |