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Re: [RFC v2 56/76] target/riscv: rvv-0.9: widening integer reduction ins
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From: |
Richard Henderson |
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Subject: |
Re: [RFC v2 56/76] target/riscv: rvv-0.9: widening integer reduction instructions |
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Date: |
Fri, 31 Jul 2020 08:13:55 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 7/22/20 2:16 AM, frank.chang@sifive.com wrote:
> /* Vector Widening Integer Reduction Instructions */
> /* signed sum reduction into double-width accumulator */
> -GEN_VEXT_RED(vwredsum_vs_b, int16_t, int8_t, H2, H1, DO_ADD, clearh)
> -GEN_VEXT_RED(vwredsum_vs_h, int32_t, int16_t, H4, H2, DO_ADD, clearl)
> -GEN_VEXT_RED(vwredsum_vs_w, int64_t, int32_t, H8, H4, DO_ADD, clearq)
> +GEN_VEXT_RED(vwredsum_vs_b, int16_t, int8_t, H2, H1, DO_ADD)
> +GEN_VEXT_RED(vwredsum_vs_h, int32_t, int16_t, H4, H2, DO_ADD)
> +GEN_VEXT_RED(vwredsum_vs_w, int64_t, int32_t, H8, H4, DO_ADD)
This patch can't be split from the previous, because it won't compile. I'm not
quite sure where we are here with whether the patch is actually required or
not, with respect to VTA.
r~
- Re: [RFC v2 50/76] target/riscv: rvv-0.9: single-width saturating add and subtract instructions, (continued)
- [RFC v2 51/76] target/riscv: rvv-0.9: integer comparison instructions, frank . chang, 2020/07/22
- [RFC v2 52/76] fpu: implement full set compare for fp16, frank . chang, 2020/07/22
- [RFC v2 53/76] target/riscv: use softfloat lib float16 comparison functions, frank . chang, 2020/07/22
- [RFC v2 54/76] target/riscv: rvv-0.9: floating-point compare instructions, frank . chang, 2020/07/22
- [RFC v2 55/76] target/riscv: rvv-0.9: single-width integer reduction instructions, frank . chang, 2020/07/22
- [RFC v2 56/76] target/riscv: rvv-0.9: widening integer reduction instructions, frank . chang, 2020/07/22
- Re: [RFC v2 56/76] target/riscv: rvv-0.9: widening integer reduction instructions,
Richard Henderson <=
- [RFC v2 57/76] target/riscv: rvv-0.9: mask-register logical instructions, frank . chang, 2020/07/22
- [RFC v2 58/76] target/riscv: rvv-0.9: slide instructions, frank . chang, 2020/07/22
- [RFC v2 59/76] target/riscv: rvv-0.9: floating-point slide instructions, frank . chang, 2020/07/22
- [RFC v2 60/76] target/riscv: rvv-0.9: narrowing fixed-point clip instructions, frank . chang, 2020/07/22
- [RFC v2 61/76] target/riscv: rvv-0.9: floating-point/integer type-convert instructions, frank . chang, 2020/07/22
- [RFC v2 62/76] target/riscv: rvv-0.9: single-width floating-point reduction, frank . chang, 2020/07/22