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From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: qemu-devel@nongnu.org
Cc: "Aleksandar Rikalo" <aleksandar.rikalo@syrmia.com>,
	"Paul Burton" <paulburton@kernel.org>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
	"Hervé Poussineau" <hpoussin@reactos.org>,
	"Huacai Chen" <chenhc@lemote.com>,
	"Aurelien Jarno" <aurelien@aurel32.net>
Subject: [PULL 08/44] target/mips: Add loongson-ext lswc2 group of instructions (Part 1)
Date: Sat, 17 Oct 2020 16:02:07 +0200
Message-ID: <20201017140243.1078718-9-f4bug@amsat.org> (raw)
In-Reply-To: <20201017140243.1078718-1-f4bug@amsat.org>

From: Jiaxun Yang <jiaxun.yang@flygoat.com>

LWC2 & SWC2 have been rewritten by Loongson EXT vendor ASE
as "load/store quad word" and "shifted load/store" groups of
instructions.

This patch add implementation of these instructions:

  gslq: load 16 bytes to GPR
  gssq: store 16 bytes from GPR
  gslqc1: load 16 bytes to FPR
  gssqc1: store 16 bytes from FPR

Details of Loongson-EXT is here:
https://github.com/FlyGoat/loongson-insn/blob/master/loongson-ext.md

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Message-Id: <1602831120-3377-3-git-send-email-chenhc@lemote.com>
[PMD: Restrict t1 variable to TARGET_MIPS64, remove unused t2/fp0]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/translate.c | 86 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

diff --git a/target/mips/translate.c b/target/mips/translate.c
index b4d009078e0..e83954d782f 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -460,6 +460,17 @@ enum {
     R6_OPC_SCD         = 0x27 | OPC_SPECIAL3,
 };
 
+/* Loongson EXT load/store quad word opcodes */
+#define MASK_LOONGSON_GSLSQ(op)           (MASK_OP_MAJOR(op) | (op & 0x8020))
+enum {
+    OPC_GSLQ        = 0x0020 | OPC_LWC2,
+    OPC_GSLQC1      = 0x8020 | OPC_LWC2,
+    OPC_GSSHFL      = OPC_LWC2,
+    OPC_GSSQ        = 0x0020 | OPC_SWC2,
+    OPC_GSSQC1      = 0x8020 | OPC_SWC2,
+    OPC_GSSHFS      = OPC_SWC2,
+};
+
 /* BSHFL opcodes */
 #define MASK_BSHFL(op)              (MASK_SPECIAL3(op) | (op & (0x1F << 6)))
 
@@ -5910,6 +5921,79 @@ no_rd:
     tcg_temp_free_i64(t1);
 }
 
+static void gen_loongson_lswc2(DisasContext *ctx, int rt,
+                               int rs, int rd)
+{
+    TCGv t0;
+#if defined(TARGET_MIPS64)
+    TCGv t1;
+    int lsq_rt1 = ctx->opcode & 0x1f;
+    int lsq_offset = sextract32(ctx->opcode, 6, 9) << 4;
+#endif
+
+    t0 = tcg_temp_new();
+
+    switch (MASK_LOONGSON_GSLSQ(ctx->opcode)) {
+#if defined(TARGET_MIPS64)
+    case OPC_GSLQ:
+        t1 = tcg_temp_new();
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset);
+        tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset + 8);
+        tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_store_gpr(t1, rt);
+        gen_store_gpr(t0, lsq_rt1);
+        tcg_temp_free(t1);
+        break;
+    case OPC_GSLQC1:
+        check_cp1_enabled(ctx);
+        t1 = tcg_temp_new();
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset);
+        tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset + 8);
+        tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_store_fpr64(ctx, t1, rt);
+        gen_store_fpr64(ctx, t0, lsq_rt1);
+        tcg_temp_free(t1);
+        break;
+    case OPC_GSSQ:
+        t1 = tcg_temp_new();
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset);
+        gen_load_gpr(t1, rt);
+        tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset + 8);
+        gen_load_gpr(t1, lsq_rt1);
+        tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        tcg_temp_free(t1);
+        break;
+    case OPC_GSSQC1:
+        check_cp1_enabled(ctx);
+        t1 = tcg_temp_new();
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset);
+        gen_load_fpr64(ctx, t1, rt);
+        tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        gen_base_offset_addr(ctx, t0, rs, lsq_offset + 8);
+        gen_load_fpr64(ctx, t1, lsq_rt1);
+        tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
+                           ctx->default_tcg_memop_mask);
+        tcg_temp_free(t1);
+        break;
+#endif
+    default:
+        MIPS_INVAL("loongson_gslsq");
+        generate_exception_end(ctx, EXCP_RI);
+        break;
+    }
+    tcg_temp_free(t0);
+}
+
 /* Traps */
 static void gen_trap(DisasContext *ctx, uint32_t opc,
                      int rs, int rt, int16_t imm)
@@ -30774,6 +30858,8 @@ static void decode_opc(CPUMIPSState *env, DisasContext *ctx)
             /* OPC_BC, OPC_BALC */
             gen_compute_compact_branch(ctx, op, 0, 0,
                                        sextract32(ctx->opcode << 2, 0, 28));
+        } else if (ctx->insn_flags & ASE_LEXT) {
+            gen_loongson_lswc2(ctx, rt, rs, rd);
         } else {
             /* OPC_LWC2, OPC_SWC2 */
             /* COP2: Not implemented. */
-- 
2.26.2



  parent reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-17 14:01 [PULL 00/44] mips-next patches for 2020-10-17 Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 01/44] util/cutils: Introduce freq_to_str() to display Hertz units Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 02/44] hw/qdev-clock: Display error hint when clock is missing from device Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 03/44] hw/core/clock: Add the clock_new helper function Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 04/44] target/mips: Fix some comment spelling errors Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 05/44] target/mips: Demacro helpers for <ABS|CHS>.<D|S|PS> Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 06/44] target/mips: Demacro helpers for M<ADD|SUB>F.<D|S> Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 07/44] target/mips: Demacro helpers for <MAX|MAXA|MIN|MINA>.<D|S> Philippe Mathieu-Daudé
2020-10-17 14:02 ` Philippe Mathieu-Daudé [this message]
2020-10-17 14:02 ` [PULL 09/44] target/mips: Add loongson-ext lswc2 group of instructions (Part 2) Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 10/44] target/mips: Add loongson-ext lsdc2 group of instructions Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 11/44] target/mips/op_helper: Convert multiple if() to switch case Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 12/44] target/mips/op_helper: Document Invalidate/Writeback opcodes as no-op Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 13/44] target/mips/op_helper: Log unimplemented cache opcode Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 14/44] target/mips: Move cpu_mips_get_random() with CP0 helpers Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 15/44] target/mips/cp0_timer: Explicit unit in variable name Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 16/44] target/mips/cp0_timer: Document TIMER_PERIOD origin Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 17/44] target/mips: Move cp0_count_ns to CPUMIPSState Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 18/44] target/mips/cpu: Calculate the CP0 timer period using the CPU frequency Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 19/44] target/mips/cpu: Make cp0_count_rate a property Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 20/44] target/mips/cpu: Allow the CPU to use dynamic frequencies Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 21/44] target/mips/cpu: Introduce mips_cpu_create_with_clock() helper Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 22/44] hw/mips/r4k: Explicit CPU frequency is 200 MHz Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 23/44] hw/mips/fuloong2e: Set CPU frequency to 533 MHz Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 24/44] hw/mips/mipssim: Correct CPU frequency Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 25/44] hw/mips/jazz: Correct CPU frequencies Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 26/44] hw/mips/cps: Expose input clock and connect it to CPU cores Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 27/44] hw/mips/boston: Set CPU frequency to 1 GHz Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 28/44] hw/mips/malta: Set CPU frequency to 320 MHz Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 29/44] hw/mips/cps: Do not allow use without input clock Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 30/44] target/mips/cpu: Display warning when CPU is used " Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 31/44] hw/mips/malta: Fix FPGA I/O region size Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 32/44] hw/mips/malta: Move gt64120 related code together Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 33/44] hw/mips/malta: Use clearer qdev style Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 34/44] hw/mips: Simplify loading 64-bit ELF kernels Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 35/44] hw/mips: Simplify code using ROUND_UP(INITRD_PAGE_SIZE) Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 36/44] hw/mips: Rename TYPE_MIPS_BOSTON to TYPE_BOSTON Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 37/44] hw/mips: Remove exit(1) in case of missing ROM Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 38/44] tests/acceptance: Add MIPS record/replay tests Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 39/44] docs/system: Update MIPS CPU documentation Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 40/44] MAINTAINERS: Remove myself Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 41/44] MAINTAINERS: Put myself forward for MIPS target Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 42/44] MAINTAINERS: Downgrade MIPS Boston to 'Odd Fixes', fix Paul Burton mail Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 43/44] MAINTAINERS: Remove duplicated Malta test entries Philippe Mathieu-Daudé
2020-10-17 14:02 ` [PULL 44/44] target/mips: Increase number of TLB entries on the 34Kf core (16 -> 64) Philippe Mathieu-Daudé
2020-10-19 10:45 ` [PULL 00/44] mips-next patches for 2020-10-17 Peter Maydell

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