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target/ppc: implement xs[n]maddqp[o]/xs[n]msubqp[o]

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Implement the following PowerISA v3.0 instuctions:
xsmaddqp[o]: VSX Scalar Multiply-Add Quad-Precision [using round to Odd]
xsmsubqp[o]: VSX Scalar Multiply-Subtract Quad-Precision [using round
             to Odd]
xsnmaddqp[o]: VSX Scalar Negative Multiply-Add Quad-Precision [using
              round to Odd]
xsnmsubqp[o]: VSX Scalar Negative Multiply-Subtract Quad-Precision
              [using round to Odd]

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220225210936.1749575-38-matheus.ferst@eldorado.org.br>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Matheus Ferst 2022-03-02 06:51:38 +01:00 • committed by Cédric Le Goater
parent e4318ab2e4
commit 3bb1aed246
4 changed files with 80 additions and 0 deletions
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42
target/ppc/fpu_helper.c
View file

@ -2222,6 +2222,48 @@ VSX_MADD(xvmsubsp, 4, float32, VsrW(i), MSUB_FLGS, 0, 0)
VSX_MADD(xvnmaddsp, 4, float32, VsrW(i), NMADD_FLGS, 0, 0)
VSX_MADD(xvnmsubsp, 4, float32, VsrW(i), NMSUB_FLGS, 0, 0)
/*
* VSX_MADDQ - VSX floating point quad-precision muliply/add
* op - instruction mnemonic
* maddflgs - flags for the float*muladd routine that control the
* various forms (madd, msub, nmadd, nmsub)
* ro - round to odd
*/
#define VSX_MADDQ(op, maddflgs, ro) \
void helper_##op(CPUPPCState *env, ppc_vsr_t *xt, ppc_vsr_t *s1, ppc_vsr_t *s2,\
ppc_vsr_t *s3) \
{ \
ppc_vsr_t t = *xt; \
\
helper_reset_fpstatus(env); \
\
float_status tstat = env->fp_status; \
set_float_exception_flags(0, &tstat); \
if (ro) { \
tstat.float_rounding_mode = float_round_to_odd; \
} \
t.f128 = float128_muladd(s1->f128, s3->f128, s2->f128, maddflgs, &tstat); \
env->fp_status.float_exception_flags |= tstat.float_exception_flags; \
\
if (unlikely(tstat.float_exception_flags & float_flag_invalid)) { \
float_invalid_op_madd(env, tstat.float_exception_flags, \
false, GETPC()); \
} \
\
helper_compute_fprf_float128(env, t.f128); \
*xt = t; \
do_float_check_status(env, GETPC()); \
}
VSX_MADDQ(XSMADDQP, MADD_FLGS, 0)
VSX_MADDQ(XSMADDQPO, MADD_FLGS, 1)
VSX_MADDQ(XSMSUBQP, MSUB_FLGS, 0)
VSX_MADDQ(XSMSUBQPO, MSUB_FLGS, 1)
VSX_MADDQ(XSNMADDQP, NMADD_FLGS, 0)
VSX_MADDQ(XSNMADDQPO, NMADD_FLGS, 1)
VSX_MADDQ(XSNMSUBQP, NMSUB_FLGS, 0)
VSX_MADDQ(XSNMSUBQPO, NMSUB_FLGS, 0)
/*
* VSX_SCALAR_CMP_DP - VSX scalar floating point compare double precision
* op - instruction mnemonic