From affa3264db0fa0508d3fe9755592a21f48cc077e Mon Sep 17 00:00:00 2001 From: bellard Date: Sun, 25 May 2008 18:41:58 +0000 Subject: jump optimizations git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4582 c046a42c-6fe2-441c-8c8c-71466251a162 --- tcg/i386/tcg-target.c | 40 +++++++++------------------------------- 1 file changed, 9 insertions(+), 31 deletions(-) (limited to 'tcg/i386/tcg-target.c') diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index c3b7a03b35..cf453b3e46 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -40,7 +40,6 @@ int tcg_target_reg_alloc_order[] = { TCG_REG_ESI, TCG_REG_EDI, TCG_REG_EBP, - TCG_REG_ESP, }; const int tcg_target_call_iarg_regs[3] = { TCG_REG_EAX, TCG_REG_EDX, TCG_REG_ECX }; @@ -329,38 +328,17 @@ static void tcg_out_brcond(TCGContext *s, int cond, TCGArg arg1, TCGArg arg2, int const_arg2, int label_index) { - int c; if (const_arg2) { if (arg2 == 0) { - /* use test */ - switch(cond) { - case TCG_COND_EQ: - c = JCC_JE; - break; - case TCG_COND_NE: - c = JCC_JNE; - break; - case TCG_COND_LT: - c = JCC_JS; - break; - case TCG_COND_GE: - c = JCC_JNS; - break; - default: - goto do_cmpi; - } /* test r, r */ tcg_out_modrm(s, 0x85, arg1, arg1); - tcg_out_jxx(s, c, label_index); } else { - do_cmpi: tgen_arithi(s, ARITH_CMP, arg1, arg2); - tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index); } } else { tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3), arg2, arg1); - tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index); } + tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index); } /* XXX: we implement it at the target level to avoid having to @@ -381,42 +359,42 @@ static void tcg_out_brcond2(TCGContext *s, break; case TCG_COND_LT: tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_LT, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LE: tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_LE, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GT: tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_GT, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GE: tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_GE, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LTU: tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_LEU: tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GTU: tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]); break; case TCG_COND_GEU: tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]); - tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next); + tcg_out_jxx(s, JCC_JNE, label_next); tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]); break; default: -- cgit v1.2.1