From df6126a7f21a1a032e41b15899ca29777399d5a2 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Tue, 1 Jan 2013 18:02:24 +0100 Subject: target-mips: implement DSP (d)append sub-class with TCG DSP instruction from the (d)append sub-class can be implemented with TCG. Use a different function for these instructions are they are quite different from compare-pick sub-class. Fix BALIGN instruction for negative value, where the value should be zero-extended before being shift to the right. Reviewed-by: Richard Henderson Signed-off-by: Aurelien Jarno --- target-mips/translate.c | 133 +++++++++++++++++++++++++++++++----------------- 1 file changed, 87 insertions(+), 46 deletions(-) (limited to 'target-mips/translate.c') diff --git a/target-mips/translate.c b/target-mips/translate.c index 99f3492de2..8722638678 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -336,7 +336,7 @@ enum { /* DSP Bit/Manipulation Sub-class */ OPC_INSV_DSP = 0x0C | OPC_SPECIAL3, OPC_DINSV_DSP = 0x0D | OPC_SPECIAL3, - /* MIPS DSP Compare-Pick Sub-class */ + /* MIPS DSP Append Sub-class */ OPC_APPEND_DSP = 0x31 | OPC_SPECIAL3, OPC_DAPPEND_DSP = 0x35 | OPC_SPECIAL3, /* MIPS DSP Accumulator and DSPControl Access Sub-class */ @@ -543,7 +543,7 @@ enum { #define MASK_APPEND(op) (MASK_SPECIAL3(op) | (op & (0x1F << 6))) enum { - /* MIPS DSP Compare-Pick Sub-class */ + /* MIPS DSP Append Sub-class */ OPC_APPEND = (0x00 << 6) | OPC_APPEND_DSP, OPC_PREPEND = (0x01 << 6) | OPC_APPEND_DSP, OPC_BALIGN = (0x10 << 6) | OPC_APPEND_DSP, @@ -667,7 +667,7 @@ enum { #define MASK_DAPPEND(op) (MASK_SPECIAL3(op) | (op & (0x1F << 6))) enum { - /* DSP Compare-Pick Sub-class */ + /* DSP Append Sub-class */ OPC_DAPPEND = (0x00 << 6) | OPC_DAPPEND_DSP, OPC_PREPENDD = (0x03 << 6) | OPC_DAPPEND_DSP, OPC_PREPENDW = (0x01 << 6) | OPC_DAPPEND_DSP, @@ -13868,7 +13868,6 @@ static void gen_mipsdsp_add_cmp_pick(DisasContext *ctx, int ret, int v1, int v2, int check_ret) { const char *opn = "mipsdsp add compare pick"; - TCGv_i32 t0; TCGv t1; TCGv v1_t; TCGv v2_t; @@ -13879,7 +13878,6 @@ static void gen_mipsdsp_add_cmp_pick(DisasContext *ctx, return; } - t0 = tcg_temp_new_i32(); t1 = tcg_temp_new(); v1_t = tcg_temp_new(); v2_t = tcg_temp_new(); @@ -13888,26 +13886,6 @@ static void gen_mipsdsp_add_cmp_pick(DisasContext *ctx, gen_load_gpr(v2_t, v2); switch (op1) { - case OPC_APPEND_DSP: - switch (op2) { - case OPC_APPEND: - tcg_gen_movi_i32(t0, v2); - gen_helper_append(cpu_gpr[ret], cpu_gpr[ret], v1_t, t0); - break; - case OPC_PREPEND: - tcg_gen_movi_i32(t0, v2); - gen_helper_prepend(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); - break; - case OPC_BALIGN: - tcg_gen_movi_i32(t0, v2); - gen_helper_balign(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); - break; - default: /* Invid */ - MIPS_INVAL("MASK APPEND"); - generate_exception(ctx, EXCP_RI); - break; - } - break; case OPC_CMPU_EQ_QB_DSP: switch (op2) { case OPC_CMPU_EQ_QB: @@ -14065,23 +14043,95 @@ static void gen_mipsdsp_add_cmp_pick(DisasContext *ctx, break; } break; +#endif + } + + tcg_temp_free(t1); + tcg_temp_free(v1_t); + tcg_temp_free(v2_t); + + (void)opn; /* avoid a compiler warning */ + MIPS_DEBUG("%s", opn); +} + +static void gen_mipsdsp_append(CPUMIPSState *env, DisasContext *ctx, + uint32_t op1, int rt, int rs, int sa) +{ + const char *opn = "mipsdsp append/dappend"; + TCGv t0; + + check_dspr2(ctx); + + if (rt == 0) { + /* Treat as NOP. */ + MIPS_DEBUG("NOP"); + return; + } + + t0 = tcg_temp_new(); + gen_load_gpr(t0, rs); + + switch (op1) { + case OPC_APPEND_DSP: + switch (MASK_APPEND(ctx->opcode)) { + case OPC_APPEND: + if (sa != 0) { + tcg_gen_deposit_tl(cpu_gpr[rt], t0, cpu_gpr[rt], sa, 32 - sa); + } + tcg_gen_ext32s_tl(cpu_gpr[rt], cpu_gpr[rt]); + break; + case OPC_PREPEND: + if (sa != 0) { + tcg_gen_ext32u_tl(cpu_gpr[rt], cpu_gpr[rt]); + tcg_gen_shri_tl(cpu_gpr[rt], cpu_gpr[rt], sa); + tcg_gen_shli_tl(t0, t0, 32 - sa); + tcg_gen_or_tl(cpu_gpr[rt], cpu_gpr[rt], t0); + } + tcg_gen_ext32s_tl(cpu_gpr[rt], cpu_gpr[rt]); + break; + case OPC_BALIGN: + sa &= 3; + if (sa != 0 && sa != 2) { + tcg_gen_shli_tl(cpu_gpr[rt], cpu_gpr[rt], 8 * sa); + tcg_gen_ext32u_tl(t0, t0); + tcg_gen_shri_tl(t0, t0, 8 * (4 - sa)); + tcg_gen_or_tl(cpu_gpr[rt], cpu_gpr[rt], t0); + } + tcg_gen_ext32s_tl(cpu_gpr[rt], cpu_gpr[rt]); + break; + default: /* Invalid */ + MIPS_INVAL("MASK APPEND"); + generate_exception(ctx, EXCP_RI); + break; + } + break; +#ifdef TARGET_MIPS64 case OPC_DAPPEND_DSP: - switch (op2) { + switch (MASK_DAPPEND(ctx->opcode)) { case OPC_DAPPEND: - tcg_gen_movi_i32(t0, v2); - gen_helper_dappend(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); + if (sa != 0) { + tcg_gen_deposit_tl(cpu_gpr[rt], t0, cpu_gpr[rt], sa, 64 - sa); + } break; case OPC_PREPENDD: - tcg_gen_movi_i32(t0, v2); - gen_helper_prependd(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); + tcg_gen_shri_tl(cpu_gpr[rt], cpu_gpr[rt], 0x20 | sa); + tcg_gen_shli_tl(t0, t0, 64 - (0x20 | sa)); + tcg_gen_or_tl(cpu_gpr[rt], t0, t0); break; case OPC_PREPENDW: - tcg_gen_movi_i32(t0, v2); - gen_helper_prependw(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); + if (sa != 0) { + tcg_gen_shri_tl(cpu_gpr[rt], cpu_gpr[rt], sa); + tcg_gen_shli_tl(t0, t0, 64 - sa); + tcg_gen_or_tl(cpu_gpr[rt], cpu_gpr[rt], t0); + } break; case OPC_DBALIGN: - tcg_gen_movi_i32(t0, v2); - gen_helper_dbalign(cpu_gpr[ret], v1_t, cpu_gpr[ret], t0); + sa &= 7; + if (sa != 0 && sa != 2 && sa != 4) { + tcg_gen_shli_tl(cpu_gpr[rt], cpu_gpr[rt], 8 * sa); + tcg_gen_shri_tl(t0, t0, 8 * (8 - sa)); + tcg_gen_or_tl(cpu_gpr[rt], cpu_gpr[rt], t0); + } break; default: /* Invalid */ MIPS_INVAL("MASK DAPPEND"); @@ -14091,12 +14141,7 @@ static void gen_mipsdsp_add_cmp_pick(DisasContext *ctx, break; #endif } - - tcg_temp_free_i32(t0); - tcg_temp_free(t1); - tcg_temp_free(v1_t); - tcg_temp_free(v2_t); - + tcg_temp_free(t0); (void)opn; /* avoid a compiler warning */ MIPS_DEBUG("%s", opn); } @@ -14915,9 +14960,7 @@ static void decode_opc (CPUMIPSState *env, DisasContext *ctx, int *is_branch) } break; case OPC_APPEND_DSP: - check_dspr2(ctx); - op2 = MASK_APPEND(ctx->opcode); - gen_mipsdsp_add_cmp_pick(ctx, op1, op2, rt, rs, rd, 1); + gen_mipsdsp_append(env, ctx, op1, rt, rs, rd); break; case OPC_EXTR_W_DSP: op2 = MASK_EXTR_W(ctx->opcode); @@ -15091,9 +15134,7 @@ static void decode_opc (CPUMIPSState *env, DisasContext *ctx, int *is_branch) } break; case OPC_DAPPEND_DSP: - check_dspr2(ctx); - op2 = MASK_DAPPEND(ctx->opcode); - gen_mipsdsp_add_cmp_pick(ctx, op1, op2, rt, rs, rd, 1); + gen_mipsdsp_append(env, ctx, op1, rt, rs, rd); break; case OPC_DEXTR_W_DSP: op2 = MASK_DEXTR_W(ctx->opcode); -- cgit v1.2.1