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[Qemu-devel] [PATCH v9 20/84] target/mips: Add nanoMIPS decoding and ext
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v9 20/84] target/mips: Add nanoMIPS decoding and extraction utilities |
Date: |
Thu, 16 Aug 2018 16:57:13 +0200 |
From: Aleksandar Markovic <address@hidden>
Add some basic utility functions and macros for nanoMIPS decoding
engine.
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Yongbok Kim <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
---
target/mips/translate.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 2682ede..557b96b 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16593,6 +16593,51 @@ enum {
*
*/
+/* Implement nanoMIPS pseudocode decode_gpr(encoded_gpr, 'gpr3'). */
+static inline int decode_gpr_gpr3(int r)
+{
+ static const int map[] = { 16, 17, 18, 19, 4, 5, 6, 7 };
+
+ return map[r & 0x7];
+}
+
+/* Implement nanoMIPS pseudocode decode_gpr(encoded_gpr, 'gpr3.src.store'). */
+static inline int decode_gpr_gpr3_src_store(int r)
+{
+ static const int map[] = { 0, 17, 18, 19, 4, 5, 6, 7 };
+
+ return map[r & 0x7];
+}
+
+/* Implement nanoMIPS pseudocode decode_gpr(encoded_gpr, 'gpr4'). */
+static inline int decode_gpr_gpr4(int r)
+{
+ static const int map[] = { 8, 9, 10, 11, 4, 5, 6, 7,
+ 16, 17, 18, 19, 20, 21, 22, 23 };
+
+ return map[r & 0xf];
+}
+
+/* Implement nanoMIPS pseudocode decode_gpr(encoded_gpr, 'gpr4.zero'). */
+static inline int decode_gpr_gpr4_zero(int r)
+{
+ static const int map[] = { 8, 9, 10, 0, 4, 5, 6, 7,
+ 16, 17, 18, 19, 20, 21, 22, 23 };
+
+ return map[r & 0xf];
+}
+
+
+/* extraction utilities */
+
+#define NANOMIPS_EXTRACT_RD(op) ((op >> 7) & 0x7)
+#define NANOMIPS_EXTRACT_RS(op) ((op >> 4) & 0x7)
+#define NANOMIPS_EXTRACT_RS2(op) uMIPS_RS(op)
+#define NANOMIPS_EXTRACT_RS1(op) ((op >> 1) & 0x7)
+#define NANOMIPS_EXTRACT_RD5(op) ((op >> 5) & 0x1f)
+#define NANOMIPS_EXTRACT_RS5(op) (op & 0x1f)
+
+
static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
{
return 2;
--
2.7.4
- [Qemu-devel] [PATCH v9 04/84] target/mips: Mark switch fallthroughs with interpretable comments, (continued)
- [Qemu-devel] [PATCH v9 04/84] target/mips: Mark switch fallthroughs with interpretable comments, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 03/84] target/mips: Avoid case statements formulated by ranges - part 2, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 15/84] qemu-doc: Amend MIPS-related items, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 13/84] linux-user: Update MIPS syscall numbers up to kernel 4.18 headers, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 35/84] target/mips: Implement emulation of nanoMIPS ROTX instruction, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 40/84] target/mips: Fix pre-nanoMIPS MT ASE instructions availability control, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 19/84] target/mips: Add placeholder and invocation of decode_nanomips_opc(), Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 25/84] target/mips: Add emulation of nanoMIPS 16-bit load and store instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 20/84] target/mips: Add nanoMIPS decoding and extraction utilities,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v9 24/84] target/mips: Add emulation of nanoMIPS 16-bit misc instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 26/84] target/mips: Add emulation of nanoMIPS 16-bit logic instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 11/84] elf: Remove duplicate preprocessor constant definition, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 23/84] target/mips: Add emulation of nanoMIPS 16-bit shift instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 32/84] target/mips: Add emulation of misc nanoMIPS instructions (pool32a0), Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 31/84] target/mips: Add emulation of nanoMIPS FP instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 51/84] target/mips: Adjust exception_resume_pc() for nanoMIPS, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 30/84] target/mips: Add emulation of nanoMIPS 48-bit instructions, Aleksandar Markovic, 2018/08/16
- [Qemu-devel] [PATCH v9 27/84] target/mips: Add emulation of nanoMIPS 16-bit save and restore instructions, Aleksandar Markovic, 2018/08/16