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target/mips/mxu: Add S16MAD instruction

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The instruction is similar to multiply and accumulate
but works with MXU registers set.

Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
Message-Id: <20230608104222.1520143-14-lis8215@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Siarhei Volkau 2023-06-08 13:42:02 +03:00 committed by Philippe Mathieu-Daudé
parent 15830fa2a1
commit e722e680f7
1 changed files with 65 additions and 0 deletions
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65
target/mips/tcg/mxu_translate.c
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@ -365,6 +365,7 @@ enum {
OPC_MXU_D16MAC = 0x0A,
OPC_MXU_D16MACF = 0x0B,
OPC_MXU_D16MADL = 0x0C,
OPC_MXU_S16MAD = 0x0D,
OPC_MXU_D16MACE = 0x0F,
OPC_MXU__POOL04 = 0x10,
OPC_MXU__POOL05 = 0x11,
@ -978,6 +979,67 @@ static void gen_mxu_d16madl(DisasContext *ctx)
tcg_gen_or_tl(mxu_gpr[XRd - 1], t3, t2);
}
/*
* S16MAD XRa, XRb, XRc, XRd, aptn2, optn2 - Single packed
* signed 16 bit pattern multiply and 32-bit add/subtract.
*/
static void gen_mxu_s16mad(DisasContext *ctx)
{
TCGv t0, t1;
uint32_t XRa, XRb, XRc, XRd, optn2, aptn1, pad;
t0 = tcg_temp_new();
t1 = tcg_temp_new();
XRa = extract32(ctx->opcode, 6, 4);
XRb = extract32(ctx->opcode, 10, 4);
XRc = extract32(ctx->opcode, 14, 4);
XRd = extract32(ctx->opcode, 18, 4);
optn2 = extract32(ctx->opcode, 22, 2);
aptn1 = extract32(ctx->opcode, 24, 1);
pad = extract32(ctx->opcode, 25, 1);
if (pad) {
/* FIXME check if it influence the result */
}
gen_load_mxu_gpr(t0, XRb);
gen_load_mxu_gpr(t1, XRc);
switch (optn2) {
case MXU_OPTN2_WW: /* XRB.H*XRC.H */
tcg_gen_sextract_tl(t0, t0, 16, 16);
tcg_gen_sextract_tl(t1, t1, 16, 16);
break;
case MXU_OPTN2_LW: /* XRB.L*XRC.L */
tcg_gen_sextract_tl(t0, t0, 0, 16);
tcg_gen_sextract_tl(t1, t1, 0, 16);
break;
case MXU_OPTN2_HW: /* XRB.H*XRC.L */
tcg_gen_sextract_tl(t0, t0, 16, 16);
tcg_gen_sextract_tl(t1, t1, 0, 16);
break;
case MXU_OPTN2_XW: /* XRB.L*XRC.H */
tcg_gen_sextract_tl(t0, t0, 0, 16);
tcg_gen_sextract_tl(t1, t1, 16, 16);
break;
}
tcg_gen_mul_tl(t0, t0, t1);
gen_load_mxu_gpr(t1, XRa);
switch (aptn1) {
case MXU_APTN1_A:
tcg_gen_add_tl(t1, t1, t0);
break;
case MXU_APTN1_S:
tcg_gen_sub_tl(t1, t1, t0);
break;
}
gen_store_mxu_gpr(t1, XRd);
}
/*
* Q8MUL XRa, XRb, XRc, XRd - Parallel unsigned 8 bit pattern multiply
* Q8MULSU XRa, XRb, XRc, XRd - Parallel signed 8 bit pattern multiply
@ -2841,6 +2903,9 @@ bool decode_ase_mxu(DisasContext *ctx, uint32_t insn)
case OPC_MXU_D16MADL:
gen_mxu_d16madl(ctx);
break;
case OPC_MXU_S16MAD:
gen_mxu_s16mad(ctx);
break;
case OPC_MXU_D16MACE:
gen_mxu_d16mac(ctx, true, false);
break;