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[PULL,v4,06/46] target/mips: Add nanoMIPS decoding and extraction utilities

Message ID 1535031276-22911-7-git-send-email-aleksandar.markovic@rt-rk.com (mailing list archive)
State New, archived
Headers show
Series [PULL,v4,01/46] target/mips: Add preprocessor constants for nanoMIPS | expand

Commit Message

Aleksandar Markovic Aug. 23, 2018, 1:33 p.m. UTC 
From: Aleksandar Markovic <amarkovic@wavecomp.com>

Add some basic utility functions and macros for nanoMIPS decoding
engine.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
---
 target/mips/translate.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/target/mips/translate.c b/target/mips/translate.c
index 4184d91..ab982cf 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16593,6 +16593,17 @@  enum {
  *
  */
 
+
+/* 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;