diff options
| author | Taylor Simpson | 2021-04-09 03:07:46 +0200 |
|---|---|---|
| committer | Richard Henderson | 2021-05-01 17:31:43 +0200 |
| commit | dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c (patch) | |
| tree | b7b72776fe3a73f48a400961b2c5e802f961e51f /target/hexagon/imported | |
| parent | Hexagon (target/hexagon) add F2_sfrecipa instruction (diff) | |
| download | qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.tar.gz qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.tar.xz qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.zip | |
Hexagon (target/hexagon) add F2_sfinvsqrta
Rd32,Pe4 = sfinvsqrta(Rs32)
Square root approx
The helper packs the 2 32-bit results into a 64-bit value,
and the fGEN_TCG override unpacks them into the proper results.
Test cases in tests/tcg/hexagon/multi_result.c
FP exception tests added to tests/tcg/hexagon/fpstuff.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1617930474-31979-19-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 | ||||
| -rw-r--r-- | target/hexagon/imported/float.idef | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/target/hexagon/imported/encode_pp.def b/target/hexagon/imported/encode_pp.def index b01b4d7aa7..18fe45d696 100644 --- a/target/hexagon/imported/encode_pp.def +++ b/target/hexagon/imported/encode_pp.def @@ -1642,6 +1642,7 @@ SH2_RR_ENC(F2_conv_sf2w, "1011","100","-","000","ddddd") SH2_RR_ENC(F2_conv_sf2uw_chop, "1011","011","-","001","ddddd") SH2_RR_ENC(F2_conv_sf2w_chop, "1011","100","-","001","ddddd") SH2_RR_ENC(F2_sffixupr, "1011","101","-","000","ddddd") +SH2_RR_ENC(F2_sfinvsqrta, "1011","111","-","0ee","ddddd") DEF_FIELDROW_DESC32(ICLASS_S2op" 1100 -------- PP------ --------","[#12] Rd=(Rs,#u6)") diff --git a/target/hexagon/imported/float.idef b/target/hexagon/imported/float.idef index eb5415801a..3e75bc4604 100644 --- a/target/hexagon/imported/float.idef +++ b/target/hexagon/imported/float.idef @@ -178,6 +178,22 @@ Q6INSN(F2_sffixupd,"Rd32=sffixupd(Rs32,Rt32)",ATTRIBS(), RdV = RtV; }) +Q6INSN(F2_sfinvsqrta,"Rd32,Pe4=sfinvsqrta(Rs32)",ATTRIBS(), +"Reciprocal Square Root Approximation", +{ + fHIDE(int idx;) + fHIDE(int adjust;) + fHIDE(int mant;) + fHIDE(int exp;) + if (fSF_INVSQRT_COMMON(RsV,RdV,adjust)) { + PeV = adjust; + idx = (RsV >> 17) & 0x7f; + mant = (fSF_INVSQRT_LOOKUP(idx) << 15); + exp = fSF_BIAS() - ((fSF_GETEXP(RsV) - fSF_BIAS()) >> 1) - 1; + RdV = fMAKESF(fGETBIT(31,RsV),exp,mant); + } +}) + Q6INSN(F2_sffixupr,"Rd32=sffixupr(Rs32)",ATTRIBS(), "Fix Up Radicand", { |