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target/ppc: Implement vmsumcud instruction

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Based on [1] by Lijun Pan <ljp@linux.ibm.com>, which was never merged
into master.

[1]: https://lists.gnu.org/archive/html/qemu-ppc/2020-07/msg00419.html

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220225210936.1749575-6-matheus.ferst@eldorado.org.br>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Víctor Colombo 2022-03-02 06:51:37 +01:00 committed by Cédric Le Goater
parent 29e9dfcf75
commit 5476ef1d40
2 changed files with 57 additions and 0 deletions
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4
target/ppc/insn32.decode
View File

@ -468,6 +468,10 @@ VMULHSD 000100 ..... ..... ..... 01111001001 @VX
VMULHUD 000100 ..... ..... ..... 01011001001 @VX
VMULLD 000100 ..... ..... ..... 00111001001 @VX
## Vector Multiply-Sum Instructions
VMSUMCUD 000100 ..... ..... ..... ..... 010111 @VA
# VSX Load/Store Instructions
LXV 111101 ..... ..... ............ . 001 @DQ_TSX

53
target/ppc/translate/vmx-impl.c.inc
View File

@ -2081,6 +2081,59 @@ static bool trans_VPEXTD(DisasContext *ctx, arg_VX *a)
return true;
}
static bool trans_VMSUMCUD(DisasContext *ctx, arg_VA *a)
{
TCGv_i64 tmp0, tmp1, prod1h, prod1l, prod0h, prod0l, zero;
REQUIRE_INSNS_FLAGS2(ctx, ISA310);
REQUIRE_VECTOR(ctx);
tmp0 = tcg_temp_new_i64();
tmp1 = tcg_temp_new_i64();
prod1h = tcg_temp_new_i64();
prod1l = tcg_temp_new_i64();
prod0h = tcg_temp_new_i64();
prod0l = tcg_temp_new_i64();
zero = tcg_constant_i64(0);
/* prod1 = vsr[vra+32].dw[1] * vsr[vrb+32].dw[1] */
get_avr64(tmp0, a->vra, false);
get_avr64(tmp1, a->vrb, false);
tcg_gen_mulu2_i64(prod1l, prod1h, tmp0, tmp1);
/* prod0 = vsr[vra+32].dw[0] * vsr[vrb+32].dw[0] */
get_avr64(tmp0, a->vra, true);
get_avr64(tmp1, a->vrb, true);
tcg_gen_mulu2_i64(prod0l, prod0h, tmp0, tmp1);
/* Sum lower 64-bits elements */
get_avr64(tmp1, a->rc, false);
tcg_gen_add2_i64(tmp1, tmp0, tmp1, zero, prod1l, zero);
tcg_gen_add2_i64(tmp1, tmp0, tmp1, tmp0, prod0l, zero);
/*
* Discard lower 64-bits, leaving the carry into bit 64.
* Then sum the higher 64-bit elements.
*/
get_avr64(tmp1, a->rc, true);
tcg_gen_add2_i64(tmp1, tmp0, tmp0, zero, tmp1, zero);
tcg_gen_add2_i64(tmp1, tmp0, tmp1, tmp0, prod1h, zero);
tcg_gen_add2_i64(tmp1, tmp0, tmp1, tmp0, prod0h, zero);
/* Discard 64 more bits to complete the CHOP128(temp >> 128) */
set_avr64(a->vrt, tmp0, false);
set_avr64(a->vrt, zero, true);
tcg_temp_free_i64(tmp0);
tcg_temp_free_i64(tmp1);
tcg_temp_free_i64(prod1h);
tcg_temp_free_i64(prod1l);
tcg_temp_free_i64(prod0h);
tcg_temp_free_i64(prod0l);
return true;
}
static bool do_vx_helper(DisasContext *ctx, arg_VX *a,
void (*gen_helper)(TCGv_ptr, TCGv_ptr, TCGv_ptr))
{