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[Qemu-devel] [PATCH v6 32/77] target/mips: Add emulation of misc nanoMIP
From: |
Stefan Markovic |
Subject: |
[Qemu-devel] [PATCH v6 32/77] target/mips: Add emulation of misc nanoMIPS instructions (p_lsx) |
Date: |
Thu, 2 Aug 2018 16:16:19 +0200 |
From: Yongbok Kim <address@hidden>
Add emulation of nanoMIPS instructions situated in pool p_lsx, and
emulation of LSA instruction as well.
Reviewed-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
---
target/mips/translate.c | 132 +++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 131 insertions(+), 1 deletion(-)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 7cc1a92..dda903c 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -16853,6 +16853,125 @@ static void gen_pool32axf_nanomips_insn(CPUMIPSState
*env, DisasContext *ctx)
}
}
+
+static void gen_p_lsx(DisasContext *ctx, int rd, int rs, int rt)
+{
+ TCGv t0, t1;
+ t0 = tcg_temp_new();
+ t1 = tcg_temp_new();
+
+ gen_load_gpr(t0, rs);
+ gen_load_gpr(t1, rt);
+
+ if ((extract32(ctx->opcode, 6, 1)) == 1) {
+ /* PP.LSXS instructions require shifting */
+ switch (extract32(ctx->opcode, 7, 4)) {
+ case NM_LHXS:
+ case NM_SHXS:
+ case NM_LHUXS:
+ tcg_gen_shli_tl(t0, t0, 1);
+ break;
+ case NM_LWXS:
+ case NM_SWXS:
+ case NM_LWC1XS:
+ case NM_SWC1XS:
+ tcg_gen_shli_tl(t0, t0, 2);
+ break;
+ case NM_LDC1XS:
+ case NM_SDC1XS:
+ tcg_gen_shli_tl(t0, t0, 3);
+ break;
+ }
+ }
+ gen_op_addr_add(ctx, t0, t0, t1);
+
+ switch (extract32(ctx->opcode, 7, 4)) {
+ case NM_LBX:
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx,
+ MO_SB);
+ gen_store_gpr(t0, rd);
+ break;
+ case NM_LHX:
+ /*case NM_LHXS:*/
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx,
+ MO_TESW);
+ gen_store_gpr(t0, rd);
+ break;
+ case NM_LWX:
+ /*case NM_LWXS:*/
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx,
+ MO_TESL);
+ gen_store_gpr(t0, rd);
+ break;
+ case NM_LBUX:
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx,
+ MO_UB);
+ gen_store_gpr(t0, rd);
+ break;
+ case NM_LHUX:
+ /*case NM_LHUXS:*/
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx,
+ MO_TEUW);
+ gen_store_gpr(t0, rd);
+ break;
+ case NM_SBX:
+ gen_load_gpr(t1, rd);
+ tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx,
+ MO_8);
+ break;
+ case NM_SHX:
+ /*case NM_SHXS:*/
+ gen_load_gpr(t1, rd);
+ tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx,
+ MO_TEUW);
+ break;
+ case NM_SWX:
+ /*case NM_SWXS:*/
+ gen_load_gpr(t1, rd);
+ tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx,
+ MO_TEUL);
+ break;
+ case NM_LWC1X:
+ /*case NM_LWC1XS:*/
+ case NM_LDC1X:
+ /*case NM_LDC1XS:*/
+ case NM_SWC1X:
+ /*case NM_SWC1XS:*/
+ case NM_SDC1X:
+ /*case NM_SDC1XS:*/
+ if (ctx->CP0_Config1 & (1 << CP0C1_FP)) {
+ check_cp1_enabled(ctx);
+ switch (extract32(ctx->opcode, 7, 4)) {
+ case NM_LWC1X:
+ /*case NM_LWC1XS:*/
+ gen_flt_ldst(ctx, OPC_LWC1, rd, t0);
+ break;
+ case NM_LDC1X:
+ /*case NM_LDC1XS:*/
+ gen_flt_ldst(ctx, OPC_LDC1, rd, t0);
+ break;
+ case NM_SWC1X:
+ /*case NM_SWC1XS:*/
+ gen_flt_ldst(ctx, OPC_SWC1, rd, t0);
+ break;
+ case NM_SDC1X:
+ /*case NM_SDC1XS:*/
+ gen_flt_ldst(ctx, OPC_SDC1, rd, t0);
+ break;
+ }
+ } else {
+ generate_exception_err(ctx, EXCP_CpU, 1);
+ }
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+
+ tcg_temp_free(t0);
+ tcg_temp_free(t1);
+}
+
static void gen_pool32f_nanomips_insn(DisasContext *ctx)
{
int rt, rs, rd;
@@ -17156,7 +17275,7 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env,
DisasContext *ctx)
{
uint16_t insn;
uint32_t op;
- int rt, rs;
+ int rt, rs, rd;
int offset;
int imm;
@@ -17165,6 +17284,7 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env,
DisasContext *ctx)
rt = extract32(ctx->opcode, 21, 5);
rs = extract32(ctx->opcode, 16, 5);
+ rd = extract32(ctx->opcode, 11, 5);
op = extract32(ctx->opcode, 26, 6);
switch (op) {
@@ -17223,6 +17343,16 @@ static int decode_nanomips_32_48_opc(CPUMIPSState
*env, DisasContext *ctx)
break;
case NM_POOL32A7:
switch (extract32(ctx->opcode, 3, 3)) {
+ case NM_P_LSX:
+ gen_p_lsx(ctx, rd, rs, rt);
+ break;
+ case NM_LSA:
+ /* In nanoMIPS, the shift field directly encodes the shift
+ * amount, meaning that the supported shift values are in
+ * the range 0 to 3 (instead of 1 to 4 in MIPSR6). */
+ gen_lsa(ctx, OPC_LSA, rd, rs, rt,
+ extract32(ctx->opcode, 9, 2) - 1);
+ break;
case NM_POOL32AXF:
gen_pool32axf_nanomips_insn(env, ctx);
break;
--
1.9.1
- Re: [Qemu-devel] [PATCH v6 23/77] target/mips: Add emulation of nanoMIPS 16-bit load and store instructions, (continued)
- [Qemu-devel] [PATCH v6 24/77] target/mips: Add emulation of nanoMIPS 16-bit logic instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 25/77] target/mips: Add emulation of nanoMIPS 16-bit save and restore instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 26/77] target/mips: Add emulation of some common nanoMIPS 32-bit instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 27/77] target/mips: Add emulation of nanoMIPS instructions MOVE.P and MOVE.PREV, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 28/77] target/mips: Add emulation of nanoMIPS 48-bit instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 29/77] target/mips: Add emulation of nanoMIPS FP instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 30/77] target/mips: Add emulation of misc nanoMIPS instructions (pool32a0), Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 31/77] target/mips: Add emulation of misc nanoMIPS instructions (pool32axf), Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 32/77] target/mips: Add emulation of misc nanoMIPS instructions (p_lsx),
Stefan Markovic <=
- [Qemu-devel] [PATCH v6 33/77] target/mips: Implement emulation of nanoMIPS ROTX instruction, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 34/77] target/mips: Implement emulation of nanoMIPS EXTW instruction, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 35/77] target/mips: Add emulation of nanoMIPS 32-bit load and store instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 36/77] target/mips: Add emulation of nanoMIPS 32-bit branch instructions, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 37/77] target/mips: Implement MT ASE support for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 38/77] target/mips: Add emulation of DSP ASE for nanoMIPS - part 1, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 39/77] target/mips: Add emulation of DSP ASE for nanoMIPS - part 2, Stefan Markovic, 2018/08/02