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Re: [PATCH v5 26/60] target/riscv: vector widening saturating scaled mul
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From: |
Richard Henderson |
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Subject: |
Re: [PATCH v5 26/60] target/riscv: vector widening saturating scaled multiply-add |
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Date: |
Sat, 14 Mar 2020 01:32:54 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 |
On 3/12/20 7:58 AM, LIU Zhiwei wrote:
> +static uint16_t vwsmaccu8(CPURISCVState *env, uint8_t a, uint8_t b,
> + uint16_t c)
> +{
> + uint8_t round;
> + uint16_t res = (uint16_t)a * (uint16_t)b;
> +
> + round = get_round(env, res, 4);
> + res = (res >> 4) + round;
> + return saddu16(env, c, res);
> +}
> +static uint32_t vwsmaccu16(CPURISCVState *env, uint16_t a, uint16_t b,
With the same caveat for vxrm as before, and the spacing.
r~
- [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, (continued)
- [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, LIU Zhiwei, 2020/03/12
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, Richard Henderson, 2020/03/14
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, Richard Henderson, 2020/03/14
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, LIU Zhiwei, 2020/03/14
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, Richard Henderson, 2020/03/14
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, LIU Zhiwei, 2020/03/15
- Re: [PATCH v5 24/60] target/riscv: vector single-width averaging add and subtract, Richard Henderson, 2020/03/15
[PATCH v5 25/60] target/riscv: vector single-width fractional multiply with rounding and saturation, LIU Zhiwei, 2020/03/12
[PATCH v5 26/60] target/riscv: vector widening saturating scaled multiply-add, LIU Zhiwei, 2020/03/12
- Re: [PATCH v5 26/60] target/riscv: vector widening saturating scaled multiply-add,
Richard Henderson <=
[PATCH v5 27/60] target/riscv: vector single-width scaling shift instructions, LIU Zhiwei, 2020/03/12
[PATCH v5 28/60] target/riscv: vector narrowing fixed-point clip instructions, LIU Zhiwei, 2020/03/12
[PATCH v5 29/60] target/riscv: vector single-width floating-point add/subtract instructions, LIU Zhiwei, 2020/03/12
[PATCH v5 30/60] target/riscv: vector widening floating-point add/subtract instructions, LIU Zhiwei, 2020/03/12
[PATCH v5 31/60] target/riscv: vector single-width floating-point multiply/divide instructions, LIU Zhiwei, 2020/03/12