diff options
Diffstat (limited to 'sim/mips')
| -rw-r--r-- | sim/mips/ChangeLog | 8 | ||||
| -rw-r--r-- | sim/mips/gencode.c | 14 |
2 files changed, 17 insertions, 5 deletions
diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog index 037e1df..8831969 100644 --- a/sim/mips/ChangeLog +++ b/sim/mips/ChangeLog @@ -1,3 +1,11 @@ +start-sanitize-r5900 +Mon Sep 1 18:43:30 1997 Andrew Cagney <cagney@b1.cygnus.com> + + * gencode.c (build_instruction): For "pabsw" and "pabsh", check + for overflow due to ABS of MININT, set result to MAXINT. + (build_instruction): For "psrlvw", signextend bit 31. + +end-sanitize-r5900 Wed Aug 27 18:13:22 1997 Andrew Cagney <cagney@b1.cygnus.com> * configure: Regenerated to track ../common/aclocal.m4 changes. diff --git a/sim/mips/gencode.c b/sim/mips/gencode.c index 6ef01bf..4c6937d 100644 --- a/sim/mips/gencode.c +++ b/sim/mips/gencode.c @@ -3580,8 +3580,8 @@ build_instruction (doisa, features, mips16, insn) break; case PSRLVW: - printf("GPR_UD(destreg,0) = RT_UW(0) >> (RS_UB(0) & 0x1F);\n"); - printf("GPR_UD(destreg,1) = RT_UW(2) >> (RS_UB(8) & 0x1F);\n"); + printf("GPR_UD(destreg,0) = SIGNEXTEND ( RT_UW(0) >> (RS_UB(0) & 0x1F), 31);\n"); + printf("GPR_UD(destreg,1) = SIGNEXTEND ( RT_UW(2) >> (RS_UB(8) & 0x1F), 31);\n"); break; case PSRAVW: @@ -3658,14 +3658,18 @@ build_instruction (doisa, features, mips16, insn) { char* name = name_for_data_len( insn ); char* letter = letter_for_data_len( insn ); + char* min = min_for_data_len( insn ); + char* max = max_for_data_len( insn ); printf("int i;\n"); printf("for(i=0;i<%sS_IN_MMI_REGS;i++)\n", name ); printf(" {\n"); - printf(" if (RT_S%s(i) < 0)\n", letter ); - printf(" GPR_S%s(destreg,i) = -RT_S%s(i);\n", letter, letter ); - printf(" else\n"); + printf(" if (RT_S%s(i) >= 0)\n", letter ); printf(" GPR_S%s(destreg,i) = RT_S%s(i);\n", letter, letter ); + printf(" else if (RT_S%s(i) == %s)\n", letter, min ); + printf(" GPR_S%s(destreg,i) = %s;\n", letter, max ); + printf(" else\n"); + printf(" GPR_S%s(destreg,i) = -RT_S%s(i);\n", letter, letter ); printf(" }\n"); break; } |