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Re: [PATCH 03/38] target/riscv: Fixup saturate subtract function
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From: |
Richard Henderson |
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Subject: |
Re: [PATCH 03/38] target/riscv: Fixup saturate subtract function |
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Date: |
Fri, 12 Feb 2021 10:52:19 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 2/12/21 7:02 AM, LIU Zhiwei wrote:
> The overflow predication ((a - b) ^ a) & (a ^ b) & INT64_MIN is right.
> However, when the predication is ture and a is 0, it should return maximum.
>
> Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
> ---
> target/riscv/vector_helper.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
[PATCH 05/38] target/riscv: 8-bit Addition & Subtraction Instruction, LIU Zhiwei, 2021/02/12
[PATCH 06/38] target/riscv: SIMD 16-bit Shift Instructions, LIU Zhiwei, 2021/02/12
[PATCH 07/38] target/riscv: SIMD 8-bit Shift Instructions, LIU Zhiwei, 2021/02/12