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| author | Tom Musta <tommusta@gmail.com> | 2014-02-12 15:23:12 -0600 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-03-05 03:06:58 +0100 |
| commit | 4d82038e4198cdb8aacdf1d605c69cef29748761 (patch) | |
| tree | c986eaf0c33ce6011505602ace4c59b045ed3333 /target-ppc/int_helper.c | |
| parent | b41da4ebb2658c4abaaab01e64b9d0bb67dba003 (diff) | |
target-ppc: Altivec 2.07: vbpermq Instruction
This patch adds the Vector Bit Permute Quadword (vbpermq) instruction
introduced in Power ISA Version 2.07.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/int_helper.c')
| -rw-r--r-- | target-ppc/int_helper.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 72fb13ccfb..5885b7e5c1 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -1039,6 +1039,37 @@ void helper_vperm(CPUPPCState *env, ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, } #if defined(HOST_WORDS_BIGENDIAN) +#define VBPERMQ_INDEX(avr, i) ((avr)->u8[(i)]) +#define VBPERMQ_DW(index) (((index) & 0x40) != 0) +#else +#define VBPERMQ_INDEX(avr, i) ((avr)->u8[15-(i)]) +#define VBPERMQ_DW(index) (((index) & 0x40) == 0) +#endif + +void helper_vbpermq(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) +{ + int i; + uint64_t perm = 0; + + VECTOR_FOR_INORDER_I(i, u8) { + int index = VBPERMQ_INDEX(b, i); + + if (index < 128) { + uint64_t mask = (1ull << (63-(index & 0x3F))); + if (a->u64[VBPERMQ_DW(index)] & mask) { + perm |= (0x8000 >> i); + } + } + } + + r->u64[HI_IDX] = perm; + r->u64[LO_IDX] = 0; +} + +#undef VBPERMQ_INDEX +#undef VBPERMQ_DW + +#if defined(HOST_WORDS_BIGENDIAN) #define PKBIG 1 #else #define PKBIG 0 |