diff options
| author | Vivek Andrew Sha <vivekandrewsha@gmail.com> | 2016-07-28 23:44:17 +0530 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-09-07 12:40:12 +1000 |
| commit | 4004c1dbca3ac2399d51ba636b4de032448adc9f (patch) | |
| tree | ca4ae6fe8da3ba8a9e7f77a317ee826b1c670ad5 /target-ppc | |
| parent | 5644a17567596eea8c4e16a8087dab9cc0292c6f (diff) | |
target-ppc: add vsrv instruction
Adds Vector Shift Right Variable instruction.
Signed-off-by: Vivek Andrew Sha <vivekandrewsha@gmail.com>
[ reverse the order of computation to avoid temporary array ]
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/helper.h | 1 | ||||
| -rw-r--r-- | target-ppc/int_helper.c | 17 | ||||
| -rw-r--r-- | target-ppc/translate/vmx-impl.c | 1 | ||||
| -rw-r--r-- | target-ppc/translate/vmx-ops.c | 1 |
4 files changed, 20 insertions, 0 deletions
diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 9703f8502c..8eada2f889 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -211,6 +211,7 @@ DEF_HELPER_3(vslw, void, avr, avr, avr) DEF_HELPER_3(vsld, void, avr, avr, avr) DEF_HELPER_3(vslo, void, avr, avr, avr) DEF_HELPER_3(vsro, void, avr, avr, avr) +DEF_HELPER_3(vsrv, void, avr, avr, avr) DEF_HELPER_3(vslv, void, avr, avr, avr) DEF_HELPER_3(vaddcuw, void, avr, avr, avr) DEF_HELPER_3(vsubcuw, void, avr, avr, avr) diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 12fe1448fa..552b2e041b 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -1710,6 +1710,23 @@ void helper_vslv(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) } } +void helper_vsrv(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) +{ + int i; + unsigned int shift, bytes; + + /* Use reverse order, as destination and source register can be same. Its + * being modified in place saving temporary, reverse order will guarantee + * that computed result is not fed back. + */ + for (i = ARRAY_SIZE(r->u8) - 1; i >= 0; i--) { + shift = b->u8[i] & 0x7; /* extract shift value */ + bytes = ((i ? a->u8[i - 1] : 0) << 8) + a->u8[i]; + /* extract adjacent bytes */ + r->u8[i] = (bytes >> shift) & 0xFF; /* shift and store result */ + } +} + void helper_vsldoi(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t shift) { int sh = shift & 0xf; diff --git a/target-ppc/translate/vmx-impl.c b/target-ppc/translate/vmx-impl.c index e979668750..b9841222ea 100644 --- a/target-ppc/translate/vmx-impl.c +++ b/target-ppc/translate/vmx-impl.c @@ -383,6 +383,7 @@ GEN_VXFORM(vsrab, 2, 12); GEN_VXFORM(vsrah, 2, 13); GEN_VXFORM(vsraw, 2, 14); GEN_VXFORM(vsrad, 2, 15); +GEN_VXFORM(vsrv, 2, 28); GEN_VXFORM(vslv, 2, 29); GEN_VXFORM(vslo, 6, 16); GEN_VXFORM(vsro, 6, 17); diff --git a/target-ppc/translate/vmx-ops.c b/target-ppc/translate/vmx-ops.c index 61e08b2f2d..2a9f225e6a 100644 --- a/target-ppc/translate/vmx-ops.c +++ b/target-ppc/translate/vmx-ops.c @@ -110,6 +110,7 @@ GEN_VXFORM(vsrab, 2, 12), GEN_VXFORM(vsrah, 2, 13), GEN_VXFORM(vsraw, 2, 14), GEN_VXFORM_207(vsrad, 2, 15), +GEN_VXFORM_300(vsrv, 2, 28), GEN_VXFORM_300(vslv, 2, 29), GEN_VXFORM(vslo, 6, 16), GEN_VXFORM(vsro, 6, 17), |