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[Qemu-devel] [PULL v4 12/46] target/mips: Add emulation of nanoMIPS 16-b
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PULL v4 12/46] target/mips: Add emulation of nanoMIPS 16-bit logic instructions |
Date: |
Thu, 23 Aug 2018 15:34:02 +0200 |
From: Yongbok Kim <address@hidden>
Add emulation of NOT16, AND16, XOR16, OR16 instructions.
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 | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 569e58a..75f2b64 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16760,6 +16760,37 @@ static inline int decode_gpr_gpr4_zero(int r)
}
+/* 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 void gen_pool16c_nanomips_insn(DisasContext *ctx)
+{
+ int rt = decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode));
+ int rs = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS(ctx->opcode));
+
+ switch (extract32(ctx->opcode, 2, 2)) {
+ case NM_NOT16:
+ gen_logic(ctx, OPC_NOR, rt, rs, 0);
+ break;
+ case NM_AND16:
+ gen_logic(ctx, OPC_AND, rt, rt, rs);
+ break;
+ case NM_XOR16:
+ gen_logic(ctx, OPC_XOR, rt, rt, rs);
+ break;
+ case NM_OR16:
+ gen_logic(ctx, OPC_OR, rt, rt, rs);
+ break;
+ }
+}
+
static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
{
uint32_t op;
@@ -16836,6 +16867,7 @@ static int decode_nanomips_opc(CPUMIPSState *env,
DisasContext *ctx)
case NM_P16C:
switch (ctx->opcode & 1) {
case NM_POOL16C_0:
+ gen_pool16c_nanomips_insn(ctx);
break;
case NM_LWXS16:
gen_ldxs(ctx, rt, rs, rd);
@@ -16910,6 +16942,12 @@ static int decode_nanomips_opc(CPUMIPSState *env,
DisasContext *ctx)
}
break;
case NM_ANDI16:
+ {
+ uint32_t u = extract32(ctx->opcode, 0, 4);
+ u = (u == 12) ? 0xff :
+ (u == 13) ? 0xffff : u;
+ gen_logic_imm(ctx, OPC_ANDI, rt, rs, u);
+ }
break;
case NM_P16_LB:
offset = extract32(ctx->opcode, 0, 2);
--
2.7.4
- [Qemu-devel] [PULL v4 00/46] MIPS queue August 2018 v4, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 04/46] target/mips: Prevent switching mode related to Config3 ISA bit for nanoMIPS, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 09/46] target/mips: Add emulation of nanoMIPS 16-bit shift instructions, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 01/46] target/mips: Add preprocessor constants for nanoMIPS, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 12/46] target/mips: Add emulation of nanoMIPS 16-bit logic instructions,
Aleksandar Markovic <=
- [Qemu-devel] [PULL v4 15/46] target/mips: Add emulation of nanoMIPS instructions MOVE.P and MOVE.PREV, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 03/46] target/mips: Add nanoMIPS DSP ASE opcodes, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 07/46] target/mips: Add emulation of nanoMIPS 16-bit arithmetic instructions, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 18/46] target/mips: Add emulation of misc nanoMIPS instructions (pool32a0), Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 06/46] target/mips: Add nanoMIPS decoding and extraction utilities, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 13/46] target/mips: Add emulation of nanoMIPS 16-bit save and restore instructions, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 02/46] target/mips: Add nanoMIPS base instruction set opcodes, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 05/46] target/mips: Add placeholder and invocation of decode_nanomips_opc(), Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 08/46] target/mips: Add emulation of nanoMIPS 16-bit branch instructions, Aleksandar Markovic, 2018/08/23
- [Qemu-devel] [PULL v4 27/46] target/mips: Fix pre-nanoMIPS MT ASE instructions availability control, Aleksandar Markovic, 2018/08/23