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[Qemu-devel] [4619] Fix modulus result from MIPS DDIV & avoid overflowin
From: |
Thiemo Seufer |
Subject: |
[Qemu-devel] [4619] Fix modulus result from MIPS DDIV & avoid overflowing division, |
Date: |
Thu, 29 May 2008 18:23:31 +0000 |
Revision: 4619
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4619
Author: ths
Date: 2008-05-29 18:23:31 +0000 (Thu, 29 May 2008)
Log Message:
-----------
Fix modulus result from MIPS DDIV & avoid overflowing division,
by Richard Sandiford.
Modified Paths:
--------------
trunk/target-mips/translate.c
Modified: trunk/target-mips/translate.c
===================================================================
--- trunk/target-mips/translate.c 2008-05-29 18:20:36 UTC (rev 4618)
+++ trunk/target-mips/translate.c 2008-05-29 18:23:31 UTC (rev 4619)
@@ -1964,20 +1964,25 @@
tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_T[1], 0, l1);
{
int l2 = gen_new_label();
- int l3 = gen_new_label();
tcg_gen_brcondi_tl(TCG_COND_NE, cpu_T[0], 1ULL << 63, l2);
tcg_gen_brcondi_tl(TCG_COND_NE, cpu_T[1], -1ULL, l2);
- tcg_gen_div_i64(cpu_T[0], cpu_T[0], cpu_T[1]);
- tcg_gen_movi_tl(cpu_T[1], 0);
- tcg_gen_br(l3);
+ {
+ tcg_gen_movi_tl(cpu_T[1], 0);
+ gen_store_LO(cpu_T[0], 0);
+ gen_store_HI(cpu_T[1], 0);
+ tcg_gen_br(l1);
+ }
gen_set_label(l2);
- tcg_gen_div_i64(cpu_T[0], cpu_T[0], cpu_T[1]);
- tcg_gen_rem_i64(cpu_T[1], cpu_T[0], cpu_T[1]);
- gen_set_label(l3);
+ {
+ TCGv r_tmp1 = tcg_temp_new(TCG_TYPE_I64);
+ TCGv r_tmp2 = tcg_temp_new(TCG_TYPE_I64);
- gen_store_LO(cpu_T[0], 0);
- gen_store_HI(cpu_T[1], 0);
+ tcg_gen_div_i64(r_tmp1, cpu_T[0], cpu_T[1]);
+ tcg_gen_rem_i64(r_tmp2, cpu_T[0], cpu_T[1]);
+ gen_store_LO(r_tmp1, 0);
+ gen_store_HI(r_tmp2, 0);
+ }
}
gen_set_label(l1);
}
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