OpenE2K/qemu-e2k
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Simplify branch likely handling.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2676 c046a42c-6fe2-441c-8c8c-71466251a162
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ths 2007-04-16 01:35:29 +00:00
parent e9a9a0811f
commit 9898128f55
1 changed files with 8 additions and 6 deletions
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14
target-mips/translate.c
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@ -1455,12 +1455,11 @@ static inline void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest)
gen_op_goto_tb1(TBPARAM(tb)); gen_op_goto_tb1(TBPARAM(tb));
gen_op_save_pc(dest); gen_op_save_pc(dest);
gen_op_set_T0((long)tb + n); gen_op_set_T0((long)tb + n);
gen_op_exit_tb();
} else { } else {
gen_op_save_pc(dest); gen_op_save_pc(dest);
gen_op_set_T0(0); gen_op_reset_T0();
gen_op_exit_tb();
} }
gen_op_exit_tb();
} }
/* Branches (before delay slot) */ /* Branches (before delay slot) */
@ -1565,18 +1564,21 @@ static void gen_compute_branch (DisasContext *ctx, uint32_t opc,
case OPC_BLTZAL: /* 0 < 0 */ case OPC_BLTZAL: /* 0 < 0 */
gen_op_set_T0(ctx->pc + 8); gen_op_set_T0(ctx->pc + 8);
gen_op_store_T0_gpr(31); gen_op_store_T0_gpr(31);
MIPS_DEBUG("bnever and link");
return; return;
case OPC_BLTZALL: /* 0 < 0 likely */ case OPC_BLTZALL: /* 0 < 0 likely */
gen_op_set_T0(ctx->pc + 8); gen_op_set_T0(ctx->pc + 8);
gen_op_store_T0_gpr(31); gen_op_store_T0_gpr(31);
gen_goto_tb(ctx, 0, ctx->pc + 8); /* Skip the instruction in the delay slot */
MIPS_DEBUG("bnever, link and skip");
ctx->pc += 4;
return; return;
case OPC_BNEL: /* rx != rx likely */ case OPC_BNEL: /* rx != rx likely */
case OPC_BGTZL: /* 0 > 0 likely */ case OPC_BGTZL: /* 0 > 0 likely */
case OPC_BLTZL: /* 0 < 0 likely */ case OPC_BLTZL: /* 0 < 0 likely */
/* Skip the instruction in the delay slot */ /* Skip the instruction in the delay slot */
MIPS_DEBUG("bnever and skip"); MIPS_DEBUG("bnever and skip");
gen_goto_tb(ctx, 0, ctx->pc + 8); ctx->pc += 4;
return; return;
case OPC_J: case OPC_J:
ctx->hflags |= MIPS_HFLAG_B; ctx->hflags |= MIPS_HFLAG_B;
@ -5275,7 +5277,7 @@ done_generating:
#endif #endif
if (loglevel & CPU_LOG_TB_IN_ASM) { if (loglevel & CPU_LOG_TB_IN_ASM) {
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start)); fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
target_disas(logfile, pc_start, ctx.pc - pc_start, 0); target_disas(logfile, pc_start, ctx.pc - pc_start, 0);
fprintf(logfile, "\n"); fprintf(logfile, "\n");
} }
if (loglevel & CPU_LOG_TB_OP) { if (loglevel & CPU_LOG_TB_OP) {