diff options
| author | Taylor Simpson <tsimpson@quicinc.com> | 2021-04-08 20:07:54 -0500 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2021-05-01 16:06:11 -0700 |
| commit | e628c0156be74dd14a261bbd18674bacd1afcc7d (patch) | |
| tree | b17ed6043deb9834bdc7d2f98f83814a013dc110 /target/hexagon/imported | |
| parent | 7aa9ffab79eb2f3ba998333e3709c7b8dbc630f1 (diff) | |
Hexagon (target/hexagon) CABAC decode bin
The following instruction is added
S2_cabacdecbin Rdd32=decbin(Rss32,Rtt32)
Test cases added to tests/tcg/hexagon/misc.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1617930474-31979-27-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/hexagon/imported')
| -rw-r--r-- | target/hexagon/imported/encode_pp.def | 1 | ||||
| -rwxr-xr-x | target/hexagon/imported/macros.def | 15 | ||||
| -rw-r--r-- | target/hexagon/imported/shift.idef | 47 |
3 files changed, 63 insertions, 0 deletions
diff --git a/target/hexagon/imported/encode_pp.def b/target/hexagon/imported/encode_pp.def index dc4eba4f68..35ae3d2369 100644 --- a/target/hexagon/imported/encode_pp.def +++ b/target/hexagon/imported/encode_pp.def @@ -1767,6 +1767,7 @@ SH_RRR_ENC(S4_vxsubaddh, "0001","01-","-","110","ddddd") SH_RRR_ENC(S4_vxaddsubhr, "0001","11-","-","00-","ddddd") SH_RRR_ENC(S4_vxsubaddhr, "0001","11-","-","01-","ddddd") SH_RRR_ENC(S4_extractp_rp, "0001","11-","-","10-","ddddd") +SH_RRR_ENC(S2_cabacdecbin, "0001","11-","-","11-","ddddd") /* implicit P0 write */ DEF_FIELDROW_DESC32(ICLASS_S3op" 0010 -------- PP------ --------","[#2] Rdd=(Rss,Rtt,Pu)") diff --git a/target/hexagon/imported/macros.def b/target/hexagon/imported/macros.def index 56c99b1d64..32ed3bf8fc 100755 --- a/target/hexagon/imported/macros.def +++ b/target/hexagon/imported/macros.def @@ -92,6 +92,21 @@ DEF_MACRO( /* attribs */ ) + +DEF_MACRO( + fINSERT_RANGE, + { + int offset=LOWBIT; + int width=HIBIT-LOWBIT+1; + /* clear bits where new bits go */ + INREG &= ~(((fCONSTLL(1)<<width)-1)<<offset); + /* OR in new bits */ + INREG |= ((INVAL & ((fCONSTLL(1)<<width)-1)) << offset); + }, + /* attribs */ +) + + DEF_MACRO( f8BITSOF, ( (VAL) ? 0xff : 0x00), diff --git a/target/hexagon/imported/shift.idef b/target/hexagon/imported/shift.idef index e328ab7329..b32c4e04d1 100644 --- a/target/hexagon/imported/shift.idef +++ b/target/hexagon/imported/shift.idef @@ -1029,6 +1029,53 @@ Q6INSN(S4_clbpaddi,"Rd32=add(clb(Rss32),#s6)",ATTRIBS(A_ARCHV2), { RdV = (fMAX(fCL1_8(RssV),fCL1_8(~RssV)))+siV;}) + +Q6INSN(S2_cabacdecbin,"Rdd32=decbin(Rss32,Rtt32)",ATTRIBS(A_ARCHV3),"CABAC decode bin", +{ + fHIDE(size4u_t state;) + fHIDE(size4u_t valMPS;) + fHIDE(size4u_t bitpos;) + fHIDE(size4u_t range;) + fHIDE(size4u_t offset;) + fHIDE(size4u_t rLPS;) + fHIDE(size4u_t rMPS;) + + state = fEXTRACTU_RANGE( fGETWORD(1,RttV) ,5,0); + valMPS = fEXTRACTU_RANGE( fGETWORD(1,RttV) ,8,8); + bitpos = fEXTRACTU_RANGE( fGETWORD(0,RttV) ,4,0); + range = fGETWORD(0,RssV); + offset = fGETWORD(1,RssV); + + /* calculate rLPS */ + range <<= bitpos; + offset <<= bitpos; + rLPS = rLPS_table_64x4[state][ (range >>29)&3]; + rLPS = rLPS << 23; /* left aligned */ + + /* calculate rMPS */ + rMPS= (range&0xff800000) - rLPS; + + /* most probable region */ + if (offset < rMPS) { + RddV = AC_next_state_MPS_64[state]; + fINSERT_RANGE(RddV,8,8,valMPS); + fINSERT_RANGE(RddV,31,23,(rMPS>>23)); + fSETWORD(1,RddV,offset); + fWRITE_P0(valMPS); + + + } + /* least probable region */ + else { + RddV = AC_next_state_LPS_64[state]; + fINSERT_RANGE(RddV,8,8,((!state)?(1-valMPS):(valMPS))); + fINSERT_RANGE(RddV,31,23,(rLPS>>23)); + fSETWORD(1,RddV,(offset-rMPS)); + fWRITE_P0((valMPS^1)); + } +}) + + Q6INSN(S2_clb,"Rd32=clb(Rs32)",ATTRIBS(), "Count leading bits", {RdV = fMAX(fCL1_4(RsV),fCL1_4(~RsV));}) |