[PULL 22/27] target/ppc: Move floating-point compare instructions to decodetree.

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

From: Chinmay Rath <rathc@linux.ibm.com>

Move below instructions to decodetree specification :

	fcmp{u, o}		: X-form

The changes were verified by validating that the tcg ops generated by
those instructions remain the same, which were captured with the '-d
in_asm,op' flag.

Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Link: https://lore.kernel.org/r/20250619095840.369351-3-rathc@linux.ibm.com
Message-ID: <20250619095840.369351-3-rathc@linux.ibm.com>
---
 target/ppc/helper.h                |  4 +--
 target/ppc/insn32.decode           |  5 ++++
 target/ppc/fpu_helper.c            |  4 +--
 target/ppc/translate/fp-impl.c.inc | 45 +++++++++---------------------
 target/ppc/translate/fp-ops.c.inc  |  2 --
 5 files changed, 22 insertions(+), 38 deletions(-)

diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 96000f4f0d..e99c8c824b 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -94,8 +94,8 @@ DEF_HELPER_2(fpscr_setbit, void, env, i32)
 DEF_HELPER_FLAGS_1(todouble, TCG_CALL_NO_RWG_SE, i64, i32)
 DEF_HELPER_FLAGS_1(tosingle, TCG_CALL_NO_RWG_SE, i32, i64)
 
-DEF_HELPER_4(fcmpo, void, env, i64, i64, i32)
-DEF_HELPER_4(fcmpu, void, env, i64, i64, i32)
+DEF_HELPER_4(FCMPO, void, env, i64, i64, i32)
+DEF_HELPER_4(FCMPU, void, env, i64, i64, i32)
 
 DEF_HELPER_2(FCTIW, i64, env, i64)
 DEF_HELPER_2(FCTIWU, i64, env, i64)
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index 0c7472d929..d446ec534d 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -592,6 +592,11 @@ FCFIDS          111011 ..... ----- ..... 1101001110 .   @X_tb_rc
 FCFIDU          111111 ..... ----- ..... 1111001110 .   @X_tb_rc
 FCFIDUS         111011 ..... ----- ..... 1111001110 .   @X_tb_rc
 
+### Floating-Point Compare Instructions
+
+FCMPU           111111 ... -- ..... ..... 0000000000 -  @X_bf
+FCMPO           111111 ... -- ..... ..... 0000100000 -  @X_bf
+
 ### Floating-Point Select Instruction
 
 FSEL            111111 ..... ..... ..... ..... 10111 .  @A
diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c
index 503cbd98ad..850aca6ed1 100644
--- a/target/ppc/fpu_helper.c
+++ b/target/ppc/fpu_helper.c
@@ -871,7 +871,7 @@ uint32_t helper_FTSQRT(uint64_t frb)
     return 0x8 | (fg_flag ? 4 : 0) | (fe_flag ? 2 : 0);
 }
 
-void helper_fcmpu(CPUPPCState *env, uint64_t arg1, uint64_t arg2,
+void helper_FCMPU(CPUPPCState *env, uint64_t arg1, uint64_t arg2,
                   uint32_t crfD)
 {
     CPU_DoubleU farg1, farg2;
@@ -902,7 +902,7 @@ void helper_fcmpu(CPUPPCState *env, uint64_t arg1, uint64_t arg2,
     }
 }
 
-void helper_fcmpo(CPUPPCState *env, uint64_t arg1, uint64_t arg2,
+void helper_FCMPO(CPUPPCState *env, uint64_t arg1, uint64_t arg2,
                   uint32_t crfD)
 {
     CPU_DoubleU farg1, farg2;
diff --git a/target/ppc/translate/fp-impl.c.inc b/target/ppc/translate/fp-impl.c.inc
index f296cfcdb0..4e18d350c0 100644
--- a/target/ppc/translate/fp-impl.c.inc
+++ b/target/ppc/translate/fp-impl.c.inc
@@ -257,46 +257,27 @@ static bool trans_FTSQRT(DisasContext *ctx, arg_X_bf_b *a)
 }
 
 /***                         Floating-Point compare                        ***/
-
-/* fcmpo */
-static void gen_fcmpo(DisasContext *ctx)
+static bool do_helper_cmp(DisasContext *ctx, arg_X_bf *a,
+                          void (*helper)(TCGv_env, TCGv_i64, TCGv_i64,
+                                         TCGv_i32))
 {
     TCGv_i32 crf;
-    TCGv_i64 t0;
-    TCGv_i64 t1;
-    if (unlikely(!ctx->fpu_enabled)) {
-        gen_exception(ctx, POWERPC_EXCP_FPU);
-        return;
-    }
+    TCGv_i64 t0, t1;
+    REQUIRE_INSNS_FLAGS(ctx, FLOAT);
+    REQUIRE_FPU(ctx);
     t0 = tcg_temp_new_i64();
     t1 = tcg_temp_new_i64();
     gen_reset_fpstatus();
-    crf = tcg_constant_i32(crfD(ctx->opcode));
-    get_fpr(t0, rA(ctx->opcode));
-    get_fpr(t1, rB(ctx->opcode));
-    gen_helper_fcmpo(tcg_env, t0, t1, crf);
+    crf = tcg_constant_i32(a->bf);
+    get_fpr(t0, a->ra);
+    get_fpr(t1, a->rb);
+    helper(tcg_env, t0, t1, crf);
     gen_helper_float_check_status(tcg_env);
+    return true;
 }
 
-/* fcmpu */
-static void gen_fcmpu(DisasContext *ctx)
-{
-    TCGv_i32 crf;
-    TCGv_i64 t0;
-    TCGv_i64 t1;
-    if (unlikely(!ctx->fpu_enabled)) {
-        gen_exception(ctx, POWERPC_EXCP_FPU);
-        return;
-    }
-    t0 = tcg_temp_new_i64();
-    t1 = tcg_temp_new_i64();
-    gen_reset_fpstatus();
-    crf = tcg_constant_i32(crfD(ctx->opcode));
-    get_fpr(t0, rA(ctx->opcode));
-    get_fpr(t1, rB(ctx->opcode));
-    gen_helper_fcmpu(tcg_env, t0, t1, crf);
-    gen_helper_float_check_status(tcg_env);
-}
+TRANS(FCMPU, do_helper_cmp, gen_helper_FCMPU);
+TRANS(FCMPO, do_helper_cmp, gen_helper_FCMPO);
 
 /***                         Floating-point move                           ***/
 /* fabs */
diff --git a/target/ppc/translate/fp-ops.c.inc b/target/ppc/translate/fp-ops.c.inc
index acb8ac32da..502453da35 100644
--- a/target/ppc/translate/fp-ops.c.inc
+++ b/target/ppc/translate/fp-ops.c.inc
@@ -10,8 +10,6 @@ GEN_STXF(stfiw, st32fiw, 0x17, 0x1E, PPC_FLOAT_STFIWX)
 GEN_HANDLER_E(stfdepx, 0x1F, 0x1F, 0x16, 0x00000001, PPC_NONE, PPC2_BOOKE206),
 GEN_HANDLER_E(stfdpx, 0x1F, 0x17, 0x1C, 0x00200001, PPC_NONE, PPC2_ISA205),
 
-GEN_HANDLER(fcmpo, 0x3F, 0x00, 0x01, 0x00600001, PPC_FLOAT),
-GEN_HANDLER(fcmpu, 0x3F, 0x00, 0x00, 0x00600001, PPC_FLOAT),
 GEN_HANDLER(fabs, 0x3F, 0x08, 0x08, 0x001F0000, PPC_FLOAT),
 GEN_HANDLER(fmr, 0x3F, 0x08, 0x02, 0x001F0000, PPC_FLOAT),
 GEN_HANDLER(fnabs, 0x3F, 0x08, 0x04, 0x001F0000, PPC_FLOAT),
-- 
2.43.5