summaryrefslogtreecommitdiffstats
path: root/target/mips/translate.c
diff options
context:
space:
mode:
authorYongbok Kim2018-08-02 16:16:22 +0200
committerAleksandar Markovic2018-08-24 17:51:59 +0200
commit8f1d9b6d63978b80971b15fef16636f454241879 (patch)
treef6b7533963b639b37dfb1de774dfef7074f19d46 /target/mips/translate.c
parenttarget/mips: Implement emulation of nanoMIPS EXTW instruction (diff)
downloadqemu-8f1d9b6d63978b80971b15fef16636f454241879.tar.gz
qemu-8f1d9b6d63978b80971b15fef16636f454241879.tar.xz
qemu-8f1d9b6d63978b80971b15fef16636f454241879.zip
target/mips: Add emulation of nanoMIPS 32-bit load and store instructions
Add emulation of various nanoMIPS load and store instructions. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> 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>
Diffstat (limited to 'target/mips/translate.c')
-rw-r--r--target/mips/translate.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 4fc94c64cb..4b1bb18316 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -17905,10 +17905,287 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env, DisasContext *ctx)
}
break;
case NM_P_GP_BH:
+ {
+ uint32_t u = extract32(ctx->opcode, 0, 18);
+
+ switch (extract32(ctx->opcode, 18, 3)) {
+ case NM_LBGP:
+ gen_ld(ctx, OPC_LB, rt, 28, u);
+ break;
+ case NM_SBGP:
+ gen_st(ctx, OPC_SB, rt, 28, u);
+ break;
+ case NM_LBUGP:
+ gen_ld(ctx, OPC_LBU, rt, 28, u);
+ break;
+ case NM_ADDIUGP_B:
+ if (rt != 0) {
+ gen_op_addr_addi(ctx, cpu_gpr[rt], cpu_gpr[28], u);
+ }
+ break;
+ case NM_P_GP_LH:
+ u &= ~1;
+ switch (ctx->opcode & 1) {
+ case NM_LHGP:
+ gen_ld(ctx, OPC_LH, rt, 28, u);
+ break;
+ case NM_LHUGP:
+ gen_ld(ctx, OPC_LHU, rt, 28, u);
+ break;
+ }
+ break;
+ case NM_P_GP_SH:
+ u &= ~1;
+ switch (ctx->opcode & 1) {
+ case NM_SHGP:
+ gen_st(ctx, OPC_SH, rt, 28, u);
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+ break;
+ case NM_P_GP_CP1:
+ u &= ~0x3;
+ switch (ctx->opcode & 0x3) {
+ case NM_LWC1GP:
+ gen_cop1_ldst(ctx, OPC_LWC1, rt, 28, u);
+ break;
+ case NM_LDC1GP:
+ gen_cop1_ldst(ctx, OPC_LDC1, rt, 28, u);
+ break;
+ case NM_SWC1GP:
+ gen_cop1_ldst(ctx, OPC_SWC1, rt, 28, u);
+ break;
+ case NM_SDC1GP:
+ gen_cop1_ldst(ctx, OPC_SDC1, rt, 28, u);
+ break;
+ }
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+ }
break;
case NM_P_LS_U12:
+ {
+ uint32_t u = extract32(ctx->opcode, 0, 12);
+
+ switch (extract32(ctx->opcode, 12, 4)) {
+ case NM_P_PREFU12:
+ if (rt == 31) {
+ /* SYNCI */
+ /* Break the TB to be able to sync copied instructions
+ immediately */
+ ctx->base.is_jmp = DISAS_STOP;
+ } else {
+ /* PREF */
+ /* Treat as NOP. */
+ }
+ break;
+ case NM_LB:
+ gen_ld(ctx, OPC_LB, rt, rs, u);
+ break;
+ case NM_LH:
+ gen_ld(ctx, OPC_LH, rt, rs, u);
+ break;
+ case NM_LW:
+ gen_ld(ctx, OPC_LW, rt, rs, u);
+ break;
+ case NM_LBU:
+ gen_ld(ctx, OPC_LBU, rt, rs, u);
+ break;
+ case NM_LHU:
+ gen_ld(ctx, OPC_LHU, rt, rs, u);
+ break;
+ case NM_SB:
+ gen_st(ctx, OPC_SB, rt, rs, u);
+ break;
+ case NM_SH:
+ gen_st(ctx, OPC_SH, rt, rs, u);
+ break;
+ case NM_SW:
+ gen_st(ctx, OPC_SW, rt, rs, u);
+ break;
+ case NM_LWC1:
+ gen_cop1_ldst(ctx, OPC_LWC1, rt, rs, u);
+ break;
+ case NM_LDC1:
+ gen_cop1_ldst(ctx, OPC_LDC1, rt, rs, u);
+ break;
+ case NM_SWC1:
+ gen_cop1_ldst(ctx, OPC_SWC1, rt, rs, u);
+ break;
+ case NM_SDC1:
+ gen_cop1_ldst(ctx, OPC_SDC1, rt, rs, u);
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+ }
break;
case NM_P_LS_S9:
+ {
+ int32_t s = (sextract32(ctx->opcode, 15, 1) << 8) |
+ extract32(ctx->opcode, 0, 8);
+
+ switch (extract32(ctx->opcode, 8, 3)) {
+ case NM_P_LS_S0:
+ switch (extract32(ctx->opcode, 11, 4)) {
+ case NM_LBS9:
+ gen_ld(ctx, OPC_LB, rt, rs, s);
+ break;
+ case NM_LHS9:
+ gen_ld(ctx, OPC_LH, rt, rs, s);
+ break;
+ case NM_LWS9:
+ gen_ld(ctx, OPC_LW, rt, rs, s);
+ break;
+ case NM_LBUS9:
+ gen_ld(ctx, OPC_LBU, rt, rs, s);
+ break;
+ case NM_LHUS9:
+ gen_ld(ctx, OPC_LHU, rt, rs, s);
+ break;
+ case NM_SBS9:
+ gen_st(ctx, OPC_SB, rt, rs, s);
+ break;
+ case NM_SHS9:
+ gen_st(ctx, OPC_SH, rt, rs, s);
+ break;
+ case NM_SWS9:
+ gen_st(ctx, OPC_SW, rt, rs, s);
+ break;
+ case NM_LWC1S9:
+ gen_cop1_ldst(ctx, OPC_LWC1, rt, rs, s);
+ break;
+ case NM_LDC1S9:
+ gen_cop1_ldst(ctx, OPC_LDC1, rt, rs, s);
+ break;
+ case NM_SWC1S9:
+ gen_cop1_ldst(ctx, OPC_SWC1, rt, rs, s);
+ break;
+ case NM_SDC1S9:
+ gen_cop1_ldst(ctx, OPC_SDC1, rt, rs, s);
+ break;
+ case NM_P_PREFS9:
+ if (rt == 31) {
+ /* SYNCI */
+ /* Break the TB to be able to sync copied instructions
+ immediately */
+ ctx->base.is_jmp = DISAS_STOP;
+ } else {
+ /* PREF */
+ /* Treat as NOP. */
+ }
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+ break;
+ case NM_P_LS_S1:
+ switch (extract32(ctx->opcode, 11, 4)) {
+ case NM_UALH:
+ case NM_UASH:
+ {
+ TCGv t0 = tcg_temp_new();
+ TCGv t1 = tcg_temp_new();
+
+ gen_base_offset_addr(ctx, t0, rs, s);
+
+ switch (extract32(ctx->opcode, 11, 4)) {
+ case NM_UALH:
+ tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESW |
+ MO_UNALN);
+ gen_store_gpr(t0, rt);
+ break;
+ case NM_UASH:
+ gen_load_gpr(t1, rt);
+ tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUW |
+ MO_UNALN);
+ break;
+ }
+ tcg_temp_free(t0);
+ tcg_temp_free(t1);
+ }
+ break;
+ case NM_P_LL:
+ switch (ctx->opcode & 0x03) {
+ case NM_LL:
+ gen_ld(ctx, OPC_LL, rt, rs, s);
+ break;
+ case NM_LLWP:
+ break;
+ }
+ break;
+ case NM_P_SC:
+ switch (ctx->opcode & 0x03) {
+ case NM_SC:
+ gen_st_cond(ctx, OPC_SC, rt, rs, s);
+ break;
+ case NM_SCWP:
+ break;
+ }
+ break;
+ case NM_CACHE:
+ check_cp0_enabled(ctx);
+ if (ctx->hflags & MIPS_HFLAG_ITC_CACHE) {
+ gen_cache_operation(ctx, rt, rs, s);
+ }
+ break;
+ }
+ break;
+ case NM_P_LS_WM:
+ case NM_P_LS_UAWM:
+ {
+ int count = extract32(ctx->opcode, 12, 3);
+ int counter = 0;
+
+ offset = sextract32(ctx->opcode, 15, 1) << 8 |
+ extract32(ctx->opcode, 0, 8);
+ TCGv va = tcg_temp_new();
+ TCGv t1 = tcg_temp_new();
+ TCGMemOp memop = (extract32(ctx->opcode, 8, 3)) ==
+ NM_P_LS_UAWM ? MO_UNALN : 0;
+
+ count = (count == 0) ? 8 : count;
+ while (counter != count) {
+ int this_rt = ((rt + counter) & 0x1f) | (rt & 0x10);
+ int this_offset = offset + (counter << 2);
+
+ gen_base_offset_addr(ctx, va, rs, this_offset);
+
+ switch (extract32(ctx->opcode, 11, 1)) {
+ case NM_LWM:
+ tcg_gen_qemu_ld_tl(t1, va, ctx->mem_idx,
+ memop | MO_TESL);
+ gen_store_gpr(t1, this_rt);
+ if ((this_rt == rs) &&
+ (counter != (count - 1))) {
+ /* UNPREDICTABLE */
+ }
+ break;
+ case NM_SWM:
+ this_rt = (rt == 0) ? 0 : this_rt;
+ gen_load_gpr(t1, this_rt);
+ tcg_gen_qemu_st_tl(t1, va, ctx->mem_idx,
+ memop | MO_TEUL);
+ break;
+ }
+ counter++;
+ }
+ tcg_temp_free(va);
+ tcg_temp_free(t1);
+ }
+ break;
+ default:
+ generate_exception_end(ctx, EXCP_RI);
+ break;
+ }
+ }
break;
case NM_MOVE_BALC:
break;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-12-05 02:45:18 +0100