haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

target-tricore: Add instructions of SRRS and SLRO opcode format

Browse source 
Add instructions of SSRS and SLRO opcode format.
Add micro-op generator functions for offset loads.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>

Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-10-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Bastian Koppelmann 2014-09-01 12:59:54 +01:00 committed by Peter Maydell
parent 46aa848ffb
commit d279821074
1 changed files with 59 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

59
target-tricore/translate.c
View file

@ -107,6 +107,26 @@ void tricore_cpu_dump_state(CPUState *cs, FILE *f,
* Functions to generate micro-ops
*/
/* Functions for load/save to/from memory */
static inline void gen_offset_ld(DisasContext *ctx, TCGv r1, TCGv r2,
int16_t con, TCGMemOp mop)
{
TCGv temp = tcg_temp_new();
tcg_gen_addi_tl(temp, r2, con);
tcg_gen_qemu_ld_tl(r1, temp, ctx->mem_idx, mop);
tcg_temp_free(temp);
}
static inline void gen_offset_st(DisasContext *ctx, TCGv r1, TCGv r2,
int16_t con, TCGMemOp mop)
{
TCGv temp = tcg_temp_new();
tcg_gen_addi_tl(temp, r2, con);
tcg_gen_qemu_st_tl(r1, temp, ctx->mem_idx, mop);
tcg_temp_free(temp);
}
/* Functions for arithmetic instructions */
static inline void gen_add_d(TCGv ret, TCGv r1, TCGv r2)
@ -513,9 +533,17 @@ static void decode_ssr_opc(DisasContext *ctx, int op1)
static void decode_16Bit_opc(CPUTriCoreState *env, DisasContext *ctx)
{
int op1;
int r1, r2;
int32_t const16;
TCGv temp;
op1 = MASK_OP_MAJOR(ctx->opcode);
/* handle ADDSC.A opcode only being 6 bit long */
if (unlikely((op1 & 0x3f) == OPC1_16_SRRS_ADDSC_A)) {
op1 = OPC1_16_SRRS_ADDSC_A;
}
switch (op1) {
case OPC1_16_SRC_ADD:
case OPC1_16_SRC_ADD_A15:
@ -568,6 +596,37 @@ static void decode_16Bit_opc(CPUTriCoreState *env, DisasContext *ctx)
case OPC1_16_SSR_ST_W_POSTINC:
decode_ssr_opc(ctx, op1);
break;
/* SRRS-format */
case OPC1_16_SRRS_ADDSC_A:
r2 = MASK_OP_SRRS_S2(ctx->opcode);
r1 = MASK_OP_SRRS_S1D(ctx->opcode);
const16 = MASK_OP_SRRS_N(ctx->opcode);
temp = tcg_temp_new();
tcg_gen_shli_tl(temp, cpu_gpr_d[15], const16);
tcg_gen_add_tl(cpu_gpr_a[r1], cpu_gpr_a[r2], temp);
tcg_temp_free(temp);
break;
/* SLRO-format */
case OPC1_16_SLRO_LD_A:
r1 = MASK_OP_SLRO_D(ctx->opcode);
const16 = MASK_OP_SLRO_OFF4(ctx->opcode);
gen_offset_ld(ctx, cpu_gpr_a[r1], cpu_gpr_a[15], const16 * 4, MO_LESL);
break;
case OPC1_16_SLRO_LD_BU:
r1 = MASK_OP_SLRO_D(ctx->opcode);
const16 = MASK_OP_SLRO_OFF4(ctx->opcode);
gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[15], const16, MO_UB);
break;
case OPC1_16_SLRO_LD_H:
r1 = MASK_OP_SLRO_D(ctx->opcode);
const16 = MASK_OP_SLRO_OFF4(ctx->opcode);
gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[15], const16 * 2, MO_LESW);
break;
case OPC1_16_SLRO_LD_W:
r1 = MASK_OP_SLRO_D(ctx->opcode);
const16 = MASK_OP_SLRO_OFF4(ctx->opcode);
gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[15], const16 * 4, MO_LESL);
break;
}
}