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[Qemu-devel] [PATCH v8 29/87] target/mips: Add emulation of nanoMIPS 16-
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v8 29/87] target/mips: Add emulation of nanoMIPS 16-bit load and store instructions |
Date: |
Mon, 13 Aug 2018 19:52:54 +0200 |
From: Yongbok Kim <address@hidden>
Add emulation of LWXS16, LB16, SB16, LBU16, LH16, SH16, LHU16, LW16, LWSP16,
LW4X4, SW4X4, LWGP16, SWSP16, SW16, and SWGP16 instructions.
Signed-off-by: Yongbok Kim <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
Reviewed-by: Aleksandar Markovic <address@hidden>
---
target/mips/translate.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index c7fdc73..240e3fb 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16697,6 +16697,7 @@ static int decode_nanomips_opc(CPUMIPSState *env,
DisasContext *ctx)
int rt = decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode));
int rs = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS(ctx->opcode));
int rd = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS1(ctx->opcode));
+ int offset;
int imm;
/* make sure instructions are on a halfword boundary */
@@ -16764,6 +16765,13 @@ static int decode_nanomips_opc(CPUMIPSState *env,
DisasContext *ctx)
}
break;
case NM_P16C:
+ switch (ctx->opcode & 1) {
+ case NM_POOL16C_0:
+ break;
+ case NM_LWXS16:
+ gen_ldxs(ctx, rt, rs, rd);
+ break;
+ }
break;
case NM_P16_A1:
switch (extract32(ctx->opcode, 6, 1)) {
@@ -16835,24 +16843,95 @@ static int decode_nanomips_opc(CPUMIPSState *env,
DisasContext *ctx)
case NM_ANDI16:
break;
case NM_P16_LB:
+ offset = extract32(ctx->opcode, 0, 2);
+ switch (extract32(ctx->opcode, 2, 2)) {
+ case NM_LB16:
+ gen_ld(ctx, OPC_LB, rt, rs, offset);
+ break;
+ case NM_SB16:
+ rt = decode_gpr_gpr3_src_store(
+ NANOMIPS_EXTRACT_RD(ctx->opcode));
+ gen_st(ctx, OPC_SB, rt, rs, offset);
+ break;
+ case NM_LBU16:
+ gen_ld(ctx, OPC_LBU, rt, rs, offset);
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
break;
case NM_P16_LH:
+ offset = extract32(ctx->opcode, 1, 2) << 1;
+ switch ((extract32(ctx->opcode, 3, 1) << 1) | (ctx->opcode & 1)) {
+ case NM_LH16:
+ gen_ld(ctx, OPC_LH, rt, rs, offset);
+ break;
+ case NM_SH16:
+ rt = decode_gpr_gpr3_src_store(
+ NANOMIPS_EXTRACT_RD(ctx->opcode));
+ gen_st(ctx, OPC_SH, rt, rs, offset);
+ break;
+ case NM_LHU16:
+ gen_ld(ctx, OPC_LHU, rt, rs, offset);
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
break;
case NM_LW16:
+ offset = extract32(ctx->opcode, 0, 4) << 2;
+ gen_ld(ctx, OPC_LW, rt, rs, offset);
break;
case NM_LWSP16:
+ rt = NANOMIPS_EXTRACT_RD5(ctx->opcode);
+ offset = extract32(ctx->opcode, 0, 5) << 2;
+ gen_ld(ctx, OPC_LW, rt, 29, offset);
break;
case NM_LW4X4:
+ rt = (extract32(ctx->opcode, 9, 1) << 3) |
+ extract32(ctx->opcode, 5, 3);
+ rs = (extract32(ctx->opcode, 4, 1) << 3) |
+ extract32(ctx->opcode, 0, 3);
+ offset = (extract32(ctx->opcode, 3, 1) << 3) |
+ (extract32(ctx->opcode, 8, 1) << 2);
+ rt = decode_gpr_gpr4(rt);
+ rs = decode_gpr_gpr4(rs);
+ gen_ld(ctx, OPC_LW, rt, rs, offset);
break;
case NM_SW4X4:
+ rt = (extract32(ctx->opcode, 9, 1) << 3) |
+ extract32(ctx->opcode, 5, 3);
+ rs = (extract32(ctx->opcode, 4, 1) << 3) |
+ extract32(ctx->opcode, 0, 3);
+ offset = (extract32(ctx->opcode, 3, 1) << 3) |
+ (extract32(ctx->opcode, 8, 1) << 2);
+ rt = decode_gpr_gpr4_zero(rt);
+ rs = decode_gpr_gpr4(rs);
+ gen_st(ctx, OPC_SW, rt, rs, offset);
break;
case NM_LWGP16:
+ offset = extract32(ctx->opcode, 0, 7) << 2;
+ gen_ld(ctx, OPC_LW, rt, 28, offset);
break;
case NM_SWSP16:
+ rt = NANOMIPS_EXTRACT_RD5(ctx->opcode);
+ offset = extract32(ctx->opcode, 0, 5) << 2;
+ gen_st(ctx, OPC_SW, rt, 29, offset);
break;
case NM_SW16:
+ rt = decode_gpr_gpr3_src_store(
+ NANOMIPS_EXTRACT_RD(ctx->opcode));
+ rs = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS(ctx->opcode));
+ offset = extract32(ctx->opcode, 0, 4) << 2;
+ gen_st(ctx, OPC_SW, rt, rs, offset);
break;
case NM_SWGP16:
+ rt = decode_gpr_gpr3_src_store(
+ NANOMIPS_EXTRACT_RD(ctx->opcode));
+ offset = extract32(ctx->opcode, 0, 7) << 2;
+ gen_st(ctx, OPC_SW, rt, 28, offset);
break;
case NM_BC16:
gen_compute_branch(ctx, OPC_BEQ, 2, 0, 0,
--
2.7.4
- [Qemu-devel] [PATCH v8 07/87] target/mips: Add CP0 BadInstrX register, (continued)
- [Qemu-devel] [PATCH v8 07/87] target/mips: Add CP0 BadInstrX register, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 24/87] target/mips: Add nanoMIPS decoding and extraction utilities, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 19/87] qemu-doc: Amend MIPS-related items, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 13/87] target/mips: Check ELPA flag only in some cases of MFHC0 and MTHC0, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 18/87] linux-user: Add preprocessor availability control to some syscalls, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 27/87] target/mips: Add emulation of nanoMIPS 16-bit shift instructions, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 30/87] target/mips: Add emulation of nanoMIPS 16-bit logic instructions, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 20/87] target/mips: Add preprocessor constants for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 46/87] target/mips: Add emulation of DSP ASE for nanoMIPS - part 2, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 37/87] target/mips: Add emulation of misc nanoMIPS instructions (pool32axf), Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 29/87] target/mips: Add emulation of nanoMIPS 16-bit load and store instructions,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v8 36/87] target/mips: Add emulation of misc nanoMIPS instructions (pool32a0), Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 38/87] target/mips: Add emulation of misc nanoMIPS instructions (p_lsx), Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 55/87] target/mips: Adjust set_hflags_for_handler() for nanoMIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 41/87] target/mips: Add emulation of nanoMIPS 32-bit load and store instructions, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 43/87] target/mips: Add emulation of nanoMIPS 32-bit branch instructions, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 61/87] elf: On elf loading, treat both EM_MIPS and EM_NANOMIPS as legal for MIPS, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 59/87] elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too, Aleksandar Markovic, 2018/08/13
- [Qemu-devel] [PATCH v8 57/87] target/mips: Fix ERET/ERETNC behavior related to ADEL exception, Aleksandar Markovic, 2018/08/13