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Hexagon (target/hexagon) add F2_sfinvsqrta

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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>
This commit is contained in:
Taylor Simpson 2021-04-08 20:07:46 -05:00 • committed by Richard Henderson
parent d934c16d8a
commit dd8705bdf5
9 changed files with 121 additions and 1 deletions
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16
target/hexagon/gen_tcg.h
View file

@ -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)