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-rw-r--r--target/mips/translate.c101
1 files changed, 94 insertions, 7 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 4777228ad2..cc428beaa9 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -24323,6 +24323,99 @@ static void gen_mxu_d16mac(DisasContext *ctx)
tcg_temp_free(t3);
}
+/*
+ * Q8MUL XRa, XRb, XRc, XRd - Parallel unsigned 8 bit pattern multiply
+ * Q8MULSU XRa, XRb, XRc, XRd - Parallel signed 8 bit pattern multiply
+ */
+static void gen_mxu_q8mul_q8mulsu(DisasContext *ctx)
+{
+ TCGv t0, t1, t2, t3, t4, t5, t6, t7;
+ TCGLabel *l0;
+ uint32_t XRa, XRb, XRc, XRd, sel;
+
+ t0 = tcg_temp_new();
+ t1 = tcg_temp_new();
+ t2 = tcg_temp_new();
+ t3 = tcg_temp_new();
+ t4 = tcg_temp_new();
+ t5 = tcg_temp_new();
+ t6 = tcg_temp_new();
+ t7 = tcg_temp_new();
+
+ l0 = gen_new_label();
+
+ XRa = extract32(ctx->opcode, 6, 4);
+ XRb = extract32(ctx->opcode, 10, 4);
+ XRc = extract32(ctx->opcode, 14, 4);
+ XRd = extract32(ctx->opcode, 18, 4);
+ sel = extract32(ctx->opcode, 22, 2);
+
+ gen_load_mxu_cr(t0);
+ tcg_gen_andi_tl(t0, t0, MXU_CR_MXU_EN);
+ tcg_gen_brcondi_tl(TCG_COND_NE, t0, MXU_CR_MXU_EN, l0);
+
+ gen_load_mxu_gpr(t3, XRb);
+ gen_load_mxu_gpr(t7, XRc);
+
+ if (sel == 0x2) {
+ /* Q8MULSU */
+ tcg_gen_ext8s_tl(t0, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8s_tl(t1, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8s_tl(t2, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8s_tl(t3, t3);
+ } else {
+ /* Q8MUL */
+ tcg_gen_ext8u_tl(t0, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8u_tl(t1, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8u_tl(t2, t3);
+ tcg_gen_shri_tl(t3, t3, 8);
+ tcg_gen_ext8u_tl(t3, t3);
+ }
+
+ tcg_gen_ext8u_tl(t4, t7);
+ tcg_gen_shri_tl(t7, t7, 8);
+ tcg_gen_ext8u_tl(t5, t7);
+ tcg_gen_shri_tl(t7, t7, 8);
+ tcg_gen_ext8u_tl(t6, t7);
+ tcg_gen_shri_tl(t7, t7, 8);
+ tcg_gen_ext8u_tl(t7, t7);
+
+ tcg_gen_mul_tl(t0, t0, t4);
+ tcg_gen_mul_tl(t1, t1, t5);
+ tcg_gen_mul_tl(t2, t2, t6);
+ tcg_gen_mul_tl(t3, t3, t7);
+
+ tcg_gen_andi_tl(t0, t0, 0xFFFF);
+ tcg_gen_andi_tl(t1, t1, 0xFFFF);
+ tcg_gen_andi_tl(t2, t2, 0xFFFF);
+ tcg_gen_andi_tl(t3, t3, 0xFFFF);
+
+ tcg_gen_shli_tl(t1, t1, 16);
+ tcg_gen_shli_tl(t3, t3, 16);
+
+ tcg_gen_or_tl(t0, t0, t1);
+ tcg_gen_or_tl(t1, t2, t3);
+
+ gen_store_mxu_gpr(t0, XRd);
+ gen_store_mxu_gpr(t1, XRa);
+
+ gen_set_label(l0);
+
+ tcg_temp_free(t0);
+ tcg_temp_free(t1);
+ tcg_temp_free(t2);
+ tcg_temp_free(t3);
+ tcg_temp_free(t4);
+ tcg_temp_free(t5);
+ tcg_temp_free(t6);
+ tcg_temp_free(t7);
+}
+
/*
* Decoding engine for MXU
@@ -25114,14 +25207,8 @@ static void decode_opc_mxu__pool18(CPUMIPSState *env, DisasContext *ctx)
switch (opcode) {
case OPC_MXU_Q8MUL:
- /* TODO: Implement emulation of Q8MUL instruction. */
- MIPS_INVAL("OPC_MXU_Q8MUL");
- generate_exception_end(ctx, EXCP_RI);
- break;
case OPC_MXU_Q8MULSU:
- /* TODO: Implement emulation of Q8MULSU instruction. */
- MIPS_INVAL("OPC_MXU_Q8MULSU");
- generate_exception_end(ctx, EXCP_RI);
+ gen_mxu_q8mul_q8mulsu(ctx);
break;
default:
MIPS_INVAL("decode_opc_mxu");