From 4004c1dbca3ac2399d51ba636b4de032448adc9f Mon Sep 17 00:00:00 2001 From: Vivek Andrew Sha Date: Thu, 28 Jul 2016 23:44:17 +0530 Subject: [PATCH] target-ppc: add vsrv instruction Adds Vector Shift Right Variable instruction. Signed-off-by: Vivek Andrew Sha [ reverse the order of computation to avoid temporary array ] Signed-off-by: Nikunj A Dadhania Reviewed-by: Richard Henderson Signed-off-by: David Gibson --- target-ppc/helper.h | 1 + target-ppc/int_helper.c | 17 +++++++++++++++++ target-ppc/translate/vmx-impl.c | 1 + target-ppc/translate/vmx-ops.c | 1 + 4 files changed, 20 insertions(+) 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), -- 2.30.2