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[Qemu-devel] [PATCH v15 01/12] qemu/bitops.h: Add extract8 and extract16
From: |
Yoshinori Sato |
Subject: |
[Qemu-devel] [PATCH v15 01/12] qemu/bitops.h: Add extract8 and extract16 |
Date: |
Wed, 22 May 2019 23:29:45 +0900 |
Signed-off-by: Yoshinori Sato <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
---
include/qemu/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 3f0926cf40..764f9d1ea0 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -301,6 +301,44 @@ static inline uint32_t extract32(uint32_t value, int
start, int length)
}
/**
+ * extract8:
+ * @value: the value to extract the bit field from
+ * @start: the lowest bit in the bit field (numbered from 0)
+ * @length: the length of the bit field
+ *
+ * Extract from the 8 bit input @value the bit field specified by the
+ * @start and @length parameters, and return it. The bit field must
+ * lie entirely within the 8 bit word. It is valid to request that
+ * all 8 bits are returned (ie @length 8 and @start 0).
+ *
+ * Returns: the value of the bit field extracted from the input value.
+ */
+static inline uint8_t extract8(uint8_t value, int start, int length)
+{
+ assert(start >= 0 && length > 0 && length <= 8 - start);
+ return extract32(value, start, length);
+}
+
+/**
+ * extract16:
+ * @value: the value to extract the bit field from
+ * @start: the lowest bit in the bit field (numbered from 0)
+ * @length: the length of the bit field
+ *
+ * Extract from the 16 bit input @value the bit field specified by the
+ * @start and @length parameters, and return it. The bit field must
+ * lie entirely within the 16 bit word. It is valid to request that
+ * all 16 bits are returned (ie @length 16 and @start 0).
+ *
+ * Returns: the value of the bit field extracted from the input value.
+ */
+static inline uint16_t extract16(uint16_t value, int start, int length)
+{
+ assert(start >= 0 && length > 0 && length <= 16 - start);
+ return extract32(value, start, length);
+}
+
+/**
* extract64:
* @value: the value to extract the bit field from
* @start: the lowest bit in the bit field (numbered from 0)
--
2.11.0
- [Qemu-devel] [PATCH v15 00/12] Add RX archtecture support, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 12/12] MAINTAINERS: Add RX, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 01/12] qemu/bitops.h: Add extract8 and extract16,
Yoshinori Sato <=
- [Qemu-devel] [PATCH v15 02/12] hw/registerfields.h: Add 8bit and 16bit register macros., Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 11/12] Add rx-softmmu, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 09/12] hw/char: RX62N serial communication interface (SCI), Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 10/12] hw/rx: RX Target hardware definition, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 08/12] hw/timer: RX62N internal timer modules, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 05/12] target/rx: CPU definition, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 07/12] hw/intc: RX62N interrupt controller (ICUa), Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 04/12] target/rx: TCG helper, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 06/12] target/rx: RX disassembler, Yoshinori Sato, 2019/05/22
- [Qemu-devel] [PATCH v15 03/12] target/rx: TCG translation, Yoshinori Sato, 2019/05/22