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Diffstat (limited to 'target-i386/helper.c')
-rw-r--r--target-i386/helper.c50
1 files changed, 3 insertions, 47 deletions
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 4656596eb1..20c1f57620 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -3620,50 +3620,6 @@ static void neg128(uint64_t *plow, uint64_t *phigh)
add128(plow, phigh, 1, 0);
}
-static void mul64(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b)
-{
- uint32_t a0, a1, b0, b1;
- uint64_t v;
-
- a0 = a;
- a1 = a >> 32;
-
- b0 = b;
- b1 = b >> 32;
-
- v = (uint64_t)a0 * (uint64_t)b0;
- *plow = v;
- *phigh = 0;
-
- v = (uint64_t)a0 * (uint64_t)b1;
- add128(plow, phigh, v << 32, v >> 32);
-
- v = (uint64_t)a1 * (uint64_t)b0;
- add128(plow, phigh, v << 32, v >> 32);
-
- v = (uint64_t)a1 * (uint64_t)b1;
- *phigh += v;
-#ifdef DEBUG_MULDIV
- printf("mul: 0x%016" PRIx64 " * 0x%016" PRIx64 " = 0x%016" PRIx64 "%016" PRIx64 "\n",
- a, b, *phigh, *plow);
-#endif
-}
-
-static void imul64(uint64_t *plow, uint64_t *phigh, int64_t a, int64_t b)
-{
- int sa, sb;
- sa = (a < 0);
- if (sa)
- a = -a;
- sb = (b < 0);
- if (sb)
- b = -b;
- mul64(plow, phigh, a, b);
- if (sa ^ sb) {
- neg128(plow, phigh);
- }
-}
-
/* return TRUE if overflow */
static int div64(uint64_t *plow, uint64_t *phigh, uint64_t b)
{
@@ -3731,7 +3687,7 @@ void helper_mulq_EAX_T0(void)
{
uint64_t r0, r1;
- mul64(&r0, &r1, EAX, T0);
+ mulu64(&r1, &r0, EAX, T0);
EAX = r0;
EDX = r1;
CC_DST = r0;
@@ -3742,7 +3698,7 @@ void helper_imulq_EAX_T0(void)
{
uint64_t r0, r1;
- imul64(&r0, &r1, EAX, T0);
+ muls64(&r1, &r0, EAX, T0);
EAX = r0;
EDX = r1;
CC_DST = r0;
@@ -3753,7 +3709,7 @@ void helper_imulq_T0_T1(void)
{
uint64_t r0, r1;
- imul64(&r0, &r1, T0, T1);
+ muls64(&r1, &r0, T0, T1);
T0 = r0;
CC_DST = r0;
CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));