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| author | Taylor Simpson <tsimpson@quicinc.com> | 2021-04-08 20:07:46 -0500 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2021-05-01 08:31:43 -0700 |
| commit | dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c (patch) | |
| tree | b7b72776fe3a73f48a400961b2c5e802f961e51f /target/hexagon/gen_tcg.h | |
| parent | d934c16d8a1e0fb82fd4abfa54dcb5217430577c (diff) | |
| download | qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.zip qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.tar.gz qemu-dd8705bdf529d2c694ec3a4d4a2c18bb770d5c6c.tar.bz2 | |
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/gen_tcg.h')
| -rw-r--r-- | target/hexagon/gen_tcg.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/target/hexagon/gen_tcg.h b/target/hexagon/gen_tcg.h index 428a670..d78e7b8 100644 --- a/target/hexagon/gen_tcg.h +++ b/target/hexagon/gen_tcg.h @@ -216,6 +216,22 @@ tcg_temp_free_i64(tmp); \ } while (0) +/* + * Approximation of the reciprocal square root + * r1,p0 = sfinvsqrta(r0) + * + * The helper packs the 2 32-bit results into a 64-bit value, + * so unpack them into the proper results. + */ +#define fGEN_TCG_F2_sfinvsqrta(SHORTCODE) \ + do { \ + TCGv_i64 tmp = tcg_temp_new_i64(); \ + gen_helper_sfinvsqrta(tmp, cpu_env, RsV); \ + tcg_gen_extrh_i64_i32(RdV, tmp); \ + tcg_gen_extrl_i64_i32(PeV, tmp); \ + tcg_temp_free_i64(tmp); \ + } while (0) + /* Floating point */ #define fGEN_TCG_F2_conv_sf2df(SHORTCODE) \ gen_helper_conv_sf2df(RddV, cpu_env, RsV) |