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target/arm: Split out do_whileg from helper_sve_whileg

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250704142112.1018902-75-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2025-07-04 08:20:37 -06:00 • committed by Peter Maydell
parent 56ddef7794
commit 3fd8ce4294
1 changed files with 20 additions and 19 deletions
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39
target/arm/tcg/sve_helper.c
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@ -4138,34 +4138,35 @@ uint32_t HELPER(sve_whilel)(void *vd, uint32_t count, uint32_t pred_desc)
return pred_count_test(oprbits, count, false);
}
uint32_t HELPER(sve_whileg)(void *vd, uint32_t count, uint32_t pred_desc)
/* D must be cleared on entry. */
static void do_whileg(ARMPredicateReg *d, uint64_t esz_mask,
uint32_t count, uint32_t oprbits)
{
intptr_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ);
intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ);
uint64_t esz_mask = pred_esz_masks[esz];
ARMPredicateReg *d = vd;
intptr_t i, invcount, oprbits = oprsz * 8;
uint64_t bits;
tcg_debug_assert(count <= oprbits);
/* Begin with a zero predicate register. */
memset(d, 0, sizeof(*d));
if (count) {
/* Set all of the requested bits. */
bits = esz_mask;
if (oprbits & 63) {
bits &= MAKE_64BIT_MASK(0, oprbits & 63);
}
uint32_t i, invcount = oprbits - count;
uint64_t bits = esz_mask & MAKE_64BIT_MASK(invcount & 63, 64);
invcount = oprbits - count;
for (i = (oprsz - 1) / 8; i > invcount / 64; --i) {
for (i = invcount / 64; i < oprbits / 64; ++i) {
d->p[i] = bits;
bits = esz_mask;
}
d->p[i] = bits & MAKE_64BIT_MASK(invcount & 63, 64);
if (oprbits & 63) {
d->p[i] = bits & MAKE_64BIT_MASK(0, oprbits & 63);
}
}
}
uint32_t HELPER(sve_whileg)(void *vd, uint32_t count, uint32_t pred_desc)
{
uint32_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ);
uint32_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ);
uint32_t oprbits = oprsz * 8;
uint64_t esz_mask = pred_esz_masks[esz];
ARMPredicateReg *d = vd;
memset(d, 0, sizeof(*d));
do_whileg(d, esz_mask, count, oprbits);
return pred_count_test(oprbits, count, true);
}