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target/mips/mxu: Add D32SARL D32SARW instructions

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These instructions are dual 32-bit arithmetic shift right and
pack LSBs to 2x 16-bit into a MXU register.
The difference is the shift amount source: immediate or GP reg.

Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
Message-Id: <20230608104222.1520143-25-lis8215@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Siarhei Volkau 2023-06-08 13:42:13 +03:00 committed by Philippe Mathieu-Daudé
parent 5925963476
commit f900da7691
1 changed files with 59 additions and 0 deletions
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59
target/mips/tcg/mxu_translate.c
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@ -394,6 +394,7 @@ enum {
OPC_MXU_S16SDI = 0x2D,
OPC_MXU_S32M2I = 0x2E,
OPC_MXU_S32I2M = 0x2F,
OPC_MXU_D32SARL = 0x32,
OPC_MXU__POOL19 = 0x38,
};
@ -492,6 +493,7 @@ enum {
* MXU pool 16
*/
enum {
OPC_MXU_D32SARW = 0x00,
OPC_MXU_S32ALN = 0x01,
OPC_MXU_S32ALNI = 0x02,
OPC_MXU_S32LUI = 0x03,
@ -1689,6 +1691,57 @@ static void gen_mxu_S32XOR(DisasContext *ctx)
}
}
/*
* MXU instruction category: shift
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* D32SLL D32SLR D32SAR D32SARL
* D32SLLV D32SLRV D32SARV D32SARW
* Q16SLL Q16SLR Q16SAR
* Q16SLLV Q16SLRV Q16SARV
*/
/*
* D32SARL XRa, XRb, XRc, SFT4
* Dual shift arithmetic right 32-bit integers in XRb and XRc
* to SFT4 bits (0..15). Pack 16 LSBs of each into XRa.
*
* D32SARW XRa, XRb, XRc, rb
* Dual shift arithmetic right 32-bit integers in XRb and XRc
* to rb[3:0] bits. Pack 16 LSBs of each into XRa.
*/
static void gen_mxu_d32sarl(DisasContext *ctx, bool sarw)
{
uint32_t XRa, XRb, XRc, rb;
XRa = extract32(ctx->opcode, 6, 4);
XRb = extract32(ctx->opcode, 10, 4);
XRc = extract32(ctx->opcode, 14, 4);
rb = extract32(ctx->opcode, 21, 5);
if (unlikely(XRa == 0)) {
/* destination is zero register -> do nothing */
} else {
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv t2 = tcg_temp_new();
if (!sarw) {
/* Make SFT4 from rb field */
tcg_gen_movi_tl(t2, rb >> 1);
} else {
gen_load_gpr(t2, rb);
tcg_gen_andi_tl(t2, t2, 0x0f);
}
gen_load_mxu_gpr(t0, XRb);
gen_load_mxu_gpr(t1, XRc);
tcg_gen_sar_tl(t0, t0, t2);
tcg_gen_sar_tl(t1, t1, t2);
tcg_gen_extract_tl(t2, t1, 0, 16);
tcg_gen_deposit_tl(t2, t2, t0, 16, 16);
gen_store_mxu_gpr(t2, XRa);
}
}
/*
* MXU instruction category max/min/avg
@ -4003,6 +4056,9 @@ static void decode_opc_mxu__pool16(DisasContext *ctx)
uint32_t opcode = extract32(ctx->opcode, 18, 3);
switch (opcode) {
case OPC_MXU_D32SARW:
gen_mxu_d32sarl(ctx, true);
break;
case OPC_MXU_S32ALN:
gen_mxu_S32ALN(ctx);
break;
@ -4214,6 +4270,9 @@ bool decode_ase_mxu(DisasContext *ctx, uint32_t insn)
case OPC_MXU_S16SDI:
gen_mxu_s16std(ctx, true);
break;
case OPC_MXU_D32SARL:
gen_mxu_d32sarl(ctx, false);
break;
case OPC_MXU__POOL19:
decode_opc_mxu__pool19(ctx);
break;