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Re: [PATCH 2/2] RISC-V: NaN-box FP values smaller than an FP register.

From: Kevin Buettner <kevinb at redhat dot com>
To: gdb-patches at sourceware dot org
Cc: Jim Wilson <jimw at sifive dot com>
Date: Sat, 20 Oct 2018 14:39:47 -0700
Subject: Re: [PATCH 2/2] RISC-V: NaN-box FP values smaller than an FP register.
References: <CAFyWVabswzH+cwN6aBgPbP-ccUjUC2iya+HUyLjYzxLgUaM_Zg@mail.gmail.com> <20181019214953.9010-1-jimw@sifive.com>

On Fri, 19 Oct 2018 14:49:53 -0700
Jim Wilson <jimw@sifive.com> wrote:

> The hardware requires that values in FP registers be NaN-boxed, so we must
> extend them with 1's instead of 0's as we do for integer values.
> 
> 	gdb/
> 	* riscv-tdep.c (riscv_push_dummy_call) <in_reg>: Check for value in
> 	FP reg smaller than FP reg size, and fill with -1 instead of 0.

Okay.

Kevin

Follow-Ups:
- Re: [PATCH 2/2] RISC-V: NaN-box FP values smaller than an FP register.
  - From: Jim Wilson

References:
- [PATCH 0/2] RISC-V: Improve FP register support.
  - From: Jim Wilson
- [PATCH 2/2] RISC-V: NaN-box FP values smaller than an FP register.
  - From: Jim Wilson

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