| From: |
| Andy Shevchenko <andriy.shevchenko-AT-linux.intel.com> |
| To: |
| Andy Shevchenko <andriy.shevchenko-AT-linux.intel.com>, Andreas Kemnade <andreas-AT-kemnade.info>, linux-arm-msm-AT-vger.kernel.org, linux-iio-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org |
| Subject: |
| [PATCH v4 1/4] math.h: Introduce data types for fractional numbers |
| Date: |
| Wed, 26 Jan 2022 15:53:50 +0200 |
| Message-ID: |
| <20220126135353.24007-1-andriy.shevchenko@linux.intel.com> |
| Cc: |
| Andy Gross <agross-AT-kernel.org>, Bjorn Andersson <bjorn.andersson-AT-linaro.org>, Jonathan Cameron <jic23-AT-kernel.org>, Lars-Peter Clausen <lars-AT-metafoo.de> |
| Archive-link: |
| Article |
Introduce a macro to produce data types like
struct TYPE_fract {
__TYPE numerator;
__TYPE denominator;
};
to be used in the code wherever it's needed.
In the following changes convert some users to it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
May be pulled via IIO tree.
v4: no changes
v3: no changes
v2: no changes
include/linux/math.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/math.h b/include/linux/math.h
index 53674a327e39..439b8f0b9ebd 100644
--- a/include/linux/math.h
+++ b/include/linux/math.h
@@ -2,6 +2,7 @@
#ifndef _LINUX_MATH_H
#define _LINUX_MATH_H
+#include <linux/types.h>
#include <asm/div64.h>
#include <uapi/linux/kernel.h>
@@ -106,6 +107,17 @@
} \
)
+#define __STRUCT_FRACT(type) \
+struct type##_fract { \
+ __##type numerator; \
+ __##type denominator; \
+};
+__STRUCT_FRACT(s16)
+__STRUCT_FRACT(u16)
+__STRUCT_FRACT(s32)
+__STRUCT_FRACT(u32)
+#undef __STRUCT_FRACT
+
/*
* Multiplies an integer by a fraction, while avoiding unnecessary
* overflow or loss of precision.
--
2.34.1
