mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

target-alpha: Clean up arithmetic traps.

Browse Source 
Replace the EXCP_ARITH_OVERFLOW placeholder with the complete
set of bits from the EXC_SUM IPR.  Use them in the existing
places where we raise arithmetic exceptions.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-01-04 11:24:04 -08:00 committed by Aurelien Jarno
parent dad081ee69
commit 866be65dfd
2 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
target-alpha/cpu.h
View File

@ -450,9 +450,13 @@ enum {
};
/* Arithmetic exception */
enum {
EXCP_ARITH_OVERFLOW,
};
#define EXC_M_IOV (1<<16) /* Integer Overflow */
#define EXC_M_INE (1<<15) /* Inexact result */
#define EXC_M_UNF (1<<14) /* Underflow */
#define EXC_M_FOV (1<<13) /* Overflow */
#define EXC_M_DZE (1<<12) /* Division by zero */
#define EXC_M_INV (1<<11) /* Invalid operation */
#define EXC_M_SWC (1<<10) /* Software completion */
enum {
IR_V0 = 0,

14
target-alpha/op_helper.c
View File

@ -78,7 +78,7 @@ uint64_t helper_addqv (uint64_t op1, uint64_t op2)
uint64_t tmp = op1;
op1 += op2;
if (unlikely((tmp ^ op2 ^ (-1ULL)) & (tmp ^ op1) & (1ULL << 63))) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return op1;
}
@ -88,7 +88,7 @@ uint64_t helper_addlv (uint64_t op1, uint64_t op2)
uint64_t tmp = op1;
op1 = (uint32_t)(op1 + op2);
if (unlikely((tmp ^ op2 ^ (-1UL)) & (tmp ^ op1) & (1UL << 31))) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return op1;
}
@ -98,7 +98,7 @@ uint64_t helper_subqv (uint64_t op1, uint64_t op2)
uint64_t res;
res = op1 - op2;
if (unlikely((op1 ^ op2) & (res ^ op1) & (1ULL << 63))) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return res;
}
@ -108,7 +108,7 @@ uint64_t helper_sublv (uint64_t op1, uint64_t op2)
uint32_t res;
res = op1 - op2;
if (unlikely((op1 ^ op2) & (res ^ op1) & (1UL << 31))) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return res;
}
@ -118,7 +118,7 @@ uint64_t helper_mullv (uint64_t op1, uint64_t op2)
int64_t res = (int64_t)op1 * (int64_t)op2;
if (unlikely((int32_t)res != res)) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return (int64_t)((int32_t)res);
}
@ -130,7 +130,7 @@ uint64_t helper_mulqv (uint64_t op1, uint64_t op2)
muls64(&tl, &th, op1, op2);
/* If th != 0 && th != -1, then we had an overflow */
if (unlikely((th + 1) > 1)) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
return tl;
}
@ -987,7 +987,7 @@ static inline uint64_t __helper_cvtql(uint64_t a, int s, int v)
r |= ((uint64_t)(a & 0x7FFFFFFF)) << 29;
if (v && (int64_t)((int32_t)r) != (int64_t)r) {
helper_excp(EXCP_ARITH, EXCP_ARITH_OVERFLOW);
helper_excp(EXCP_ARITH, EXC_M_IOV);
}
if (s) {
/* TODO */