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| author | Edgar E. Iglesias <edgar.iglesias@gmail.com> | 2011-01-22 12:02:53 +0100 |
|---|---|---|
| committer | Edgar E. Iglesias <edgar.iglesias@gmail.com> | 2011-01-22 12:02:53 +0100 |
| commit | 40cbf5b7098981f66ef161e6ce7a9f6770537ea4 (patch) | |
| tree | 7e478289e6c8733e271a723cd9b08704e52ea651 /target-microblaze/op_helper.c | |
| parent | 2accfb5fa6f097845915973a06824bc72fb26e94 (diff) | |
| download | qemu-40cbf5b7098981f66ef161e6ce7a9f6770537ea4.tar.gz | |
microblaze: Improve addkc
* Optimize handling when carry is not updated.
* Optimize handling for adds with nop semantics.
* Move code from helper_addkc to the translator making
helper_addkc PURE and CONST.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Diffstat (limited to 'target-microblaze/op_helper.c')
| -rw-r--r-- | target-microblaze/op_helper.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/target-microblaze/op_helper.c b/target-microblaze/op_helper.c index 97461aed6e..eb5a8b7df3 100644 --- a/target-microblaze/op_helper.c +++ b/target-microblaze/op_helper.c @@ -128,26 +128,14 @@ uint32_t helper_cmpu(uint32_t a, uint32_t b) return t; } -uint32_t helper_addkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c) +uint32_t helper_addkc(uint32_t a, uint32_t b, uint32_t cf) { - uint32_t d, cf = 0, ncf; + uint32_t d, ncf; - if (c) - cf = env->sregs[SR_MSR] >> 31; - assert(cf == 0 || cf == 1); d = a + b + cf; - if (!k) { - ncf = compute_carry(a, b, cf); - assert(ncf == 0 || ncf == 1); - if (ncf) - env->sregs[SR_MSR] |= MSR_C | MSR_CC; - else - env->sregs[SR_MSR] &= ~(MSR_C | MSR_CC); - } - D(qemu_log("%x = %x + %x cf=%d ncf=%d k=%d c=%d\n", - d, a, b, cf, ncf, k, c)); - return d; + ncf = compute_carry(a, b, cf); + return ncf; } uint32_t helper_subkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c) |