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Message-ID: <CAMKF1spZX2B7KaDoBRS6M8ZmibzYMHqFKcX7dBANqr4LpwrDKg@mail.gmail.com>
Date: Fri, 28 Jul 2023 09:46:36 -0700
From: Khem Raj <raj.khem@...il.com>
To: musl@...ts.openwall.com
Cc: dalias@...c.org, zhangfei <zhangfei@...iscas.ac.cn>
Subject: Re: [PATCH 1/1] RISC-V: Add some mathematical functions to riscv64
On Thu, Jul 27, 2023 at 11:21 PM zhangfei <zhang_fei_0403@....com> wrote:
>
> From: zhangfei <zhangfei@...iscas.ac.cn>
>
> Add a series of function implementations such as lrint and lround.
>
Do you have some performance numbers with these implementations to share ?
> Signed-off-by: Zhang Fei<zhangfei@...iscas.ac.cn>
> ---
> src/math/riscv64/llrint.c | 16 ++++++++++++++++
> src/math/riscv64/llrintf.c | 16 ++++++++++++++++
> src/math/riscv64/llround.c | 16 ++++++++++++++++
> src/math/riscv64/llroundf.c | 16 ++++++++++++++++
> src/math/riscv64/lrint.c | 16 ++++++++++++++++
> src/math/riscv64/lrintf.c | 16 ++++++++++++++++
> src/math/riscv64/lround.c | 16 ++++++++++++++++
> src/math/riscv64/lroundf.c | 16 ++++++++++++++++
> 8 files changed, 128 insertions(+)
> create mode 100644 src/math/riscv64/llrint.c
> create mode 100644 src/math/riscv64/llrintf.c
> create mode 100644 src/math/riscv64/llround.c
> create mode 100644 src/math/riscv64/llroundf.c
> create mode 100644 src/math/riscv64/lrint.c
> create mode 100644 src/math/riscv64/lrintf.c
> create mode 100644 src/math/riscv64/lround.c
> create mode 100644 src/math/riscv64/lroundf.c
>
> diff --git a/src/math/riscv64/llrint.c b/src/math/riscv64/llrint.c
> new file mode 100644
> index 0000000..2b5ea25
> --- /dev/null
> +++ b/src/math/riscv64/llrint.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 64
> +
> +long long llrint (double x)
> +{
> + long long res;
> + __asm__ ("fcvt.l.d %0, %1" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../llrint.c"
> +
> +#endif
> diff --git a/src/math/riscv64/llrintf.c b/src/math/riscv64/llrintf.c
> new file mode 100644
> index 0000000..d69566b
> --- /dev/null
> +++ b/src/math/riscv64/llrintf.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 32
> +
> +long long llrintf (float x)
> +{
> + long long res;
> + __asm__ ("fcvt.l.s %0, %1" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../llrintf.c"
> +
> +#endif
> diff --git a/src/math/riscv64/llround.c b/src/math/riscv64/llround.c
> new file mode 100644
> index 0000000..d6d2619
> --- /dev/null
> +++ b/src/math/riscv64/llround.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 64
> +
> +long long llround (double x)
> +{
> + long long res;
> + __asm__ ("fcvt.l.d %0, %1, rmm" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../llround.c"
> +
> +#endif
> diff --git a/src/math/riscv64/llroundf.c b/src/math/riscv64/llroundf.c
> new file mode 100644
> index 0000000..72b343a
> --- /dev/null
> +++ b/src/math/riscv64/llroundf.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 32
> +
> +long long llroundf (float x)
> +{
> + long long res;
> + __asm__ ("fcvt.l.s %0, %1, rmm" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../llroundf.c"
> +
> +#endif
> diff --git a/src/math/riscv64/lrint.c b/src/math/riscv64/lrint.c
> new file mode 100644
> index 0000000..c62e306
> --- /dev/null
> +++ b/src/math/riscv64/lrint.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 64
> +
> +long lrint (double x)
> +{
> + long res;
> + __asm__ ("fcvt.l.d %0, %1" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../lrint.c"
> +
> +#endif
> diff --git a/src/math/riscv64/lrintf.c b/src/math/riscv64/lrintf.c
> new file mode 100644
> index 0000000..6f3b120
> --- /dev/null
> +++ b/src/math/riscv64/lrintf.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 32
> +
> +long lrintf (float x)
> +{
> + long res;
> + __asm__ ("fcvt.l.s %0, %1" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../lrintf.c"
> +
> +#endif
> diff --git a/src/math/riscv64/lround.c b/src/math/riscv64/lround.c
> new file mode 100644
> index 0000000..7d061e8
> --- /dev/null
> +++ b/src/math/riscv64/lround.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 64
> +
> +long lround (double x)
> +{
> + long res;
> + __asm__ ("fcvt.l.d %0, %1, rmm" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../lround.c"
> +
> +#endif
> diff --git a/src/math/riscv64/lroundf.c b/src/math/riscv64/lroundf.c
> new file mode 100644
> index 0000000..34d978b
> --- /dev/null
> +++ b/src/math/riscv64/lroundf.c
> @@ -0,0 +1,16 @@
> +#include <math.h>
> +
> +#if __riscv_flen >= 32
> +
> +long lroundf (float x)
> +{
> + long res;
> + __asm__ ("fcvt.l.s %0, %1, rmm" : "=r" (res) : "f" (x));
> + return res;
> +}
> +
> +#else
> +
> +#include "../lroundf.c"
> +
> +#endif
> --
> 2.34.1
>
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