From: Peter Maydell <peter.maydell@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH 03/22] target/arm: Implement VFP fp16 for VFP_BINOP operations
Date: Thu, 27 Aug 2020 14:39:22 +0100 [thread overview]
Message-ID: <CAFEAcA8Du8ejOK1v-CKtppB2GJvKtxPmhBTDKVndceOHMQ+cFg@mail.gmail.com> (raw)
In-Reply-To: <6dee2bdb-f585-ffec-e57f-47517e278baa@linaro.org>
On Tue, 25 Aug 2020 at 19:14, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 8/24/20 7:29 AM, Peter Maydell wrote:
> > +DEF_HELPER_3(vfp_addh, f32, f32, f32, ptr)
>
> We do have an f16 entry in helper-head.h, for documentation purposes. It
> expands to the same uint32_t, so it doesn't make any practical difference.
>
>
> > +float32 VFP_HELPER(name, h)(float32 a, float32 b, void *fpstp) \
>
> And here it would be better to use uint32_t explicitly, because we're
> definitely not returning float32.
>
> I guess you could see if dh_ctype_f16 works here? But that looks a bit ugly to
> me. Perhaps we should have introduced a better typedef somewhere...
dh_ctype_f16 does work, yes. Unless you can think of a better name
I think we should go with using that. I'm not sure that "16 bit float
held in a 32-bit unsigned integer for the benefit of the TCG calling
convention" is ever going to have a particularly snappy name...
thanks
-- PMM
next prev parent reply other threads:[~2020-08-27 13:40 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 14:29 [PATCH 00/22] target/arm: Implement fp16 for AArch32 VFP Peter Maydell
2020-08-24 14:29 ` [PATCH 01/22] target/arm: Remove local definitions of float constants Peter Maydell
2020-08-25 18:04 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 02/22] target/arm: Use correct ID register check for aa32_fp16_arith Peter Maydell
2020-08-25 18:06 ` Richard Henderson
2020-08-27 13:46 ` Peter Maydell
2020-08-24 14:29 ` [PATCH 03/22] target/arm: Implement VFP fp16 for VFP_BINOP operations Peter Maydell
2020-08-25 18:14 ` Richard Henderson
2020-08-27 13:39 ` Peter Maydell [this message]
2020-08-24 14:29 ` [PATCH 04/22] target/arm: Implement VFP fp16 VMLA, VMLS, VNMLS, VNMLA, VNMUL Peter Maydell
2020-08-25 18:18 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 05/22] target/arm: Macroify trans functions for VFMA, VFMS, VFNMA, VFNMS Peter Maydell
2020-08-25 18:19 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 06/22] target/arm: Implement VFP fp16 for fused-multiply-add Peter Maydell
2020-08-25 18:21 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 07/22] target/arm: Macroify uses of do_vfp_2op_sp() and do_vfp_2op_dp() Peter Maydell
2020-08-25 18:22 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 08/22] target/arm: Implement VFP fp16 for VABS, VNEG, VSQRT Peter Maydell
2020-08-25 18:24 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 09/22] target/arm: Implement VFP fp16 for VMOV immediate Peter Maydell
2020-08-25 18:25 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 10/22] target/arm: Implement VFP fp16 VCMP Peter Maydell
2020-08-25 18:39 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 11/22] target/arm: Implement VFP fp16 VLDR and VSTR Peter Maydell
2020-08-25 18:44 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 12/22] target/arm: Implement VFP fp16 VCVT between float and integer Peter Maydell
2020-08-25 18:45 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 13/22] target/arm: Make VFP_CONV_FIX macros take separate float type and float size Peter Maydell
2020-08-25 18:47 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 14/22] target/arm: Use macros instead of open-coding fp16 conversion helpers Peter Maydell
2020-08-25 18:48 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 15/22] target/arm: Implement VFP fp16 VCVT between float and fixed-point Peter Maydell
2020-08-25 18:49 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 16/22] target/arm: Implement VFP vp16 VCVT-with-specified-rounding-mode Peter Maydell
2020-08-25 18:51 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 17/22] target/arm: Implement VFP fp16 VSEL Peter Maydell
2020-08-25 19:19 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 18/22] target/arm: Implement VFP fp16 VRINT* Peter Maydell
2020-08-25 19:21 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 19/22] target/arm: Implement new VFP fp16 insn VINS Peter Maydell
2020-08-25 19:23 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 20/22] target/arm: Implement new VFP fp16 insn VMOVX Peter Maydell
2020-08-25 19:25 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 21/22] target/arm: Implement VFP fp16 VMOV between gp and halfprec registers Peter Maydell
2020-08-25 19:29 ` Richard Henderson
2020-08-24 14:29 ` [PATCH 22/22] target/arm: Enable FP16 in '-cpu max' Peter Maydell
2020-08-25 19:30 ` Richard Henderson
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