Merge tag 'pull-tcg-20230915-2' of https://gitlab.com/rth7680/qemu into staging

*: Delete checks for old host definitions
tcg/loongarch64: Generate LSX instructions
fpu: Add conversions between bfloat16 and [u]int8
fpu: Handle m68k extended precision denormals properly
accel/tcg: Improve cputlb i/o organization
accel/tcg: Simplify tlb_plugin_lookup
accel/tcg: Remove false-negative halted assertion
tcg: Add gvec compare with immediate and scalar operand
tcg/aarch64: Emit BTI insns at jump landing pads

[Resolved conflict between CPUINFO_PMULL and CPUINFO_BTI.
--Stefan]

* tag 'pull-tcg-20230915-2' of https://gitlab.com/rth7680/qemu: (39 commits)
  tcg: Map code_gen_buffer with PROT_BTI
  tcg/aarch64: Emit BTI insns at jump landing pads
  util/cpuinfo-aarch64: Add CPUINFO_BTI
  tcg: Add tcg_out_tb_start backend hook
  fpu: Handle m68k extended precision denormals properly
  fpu: Add conversions between bfloat16 and [u]int8
  accel/tcg: Introduce do_st16_mmio_leN
  accel/tcg: Introduce do_ld16_mmio_beN
  accel/tcg: Merge io_writex into do_st_mmio_leN
  accel/tcg: Merge io_readx into do_ld_mmio_beN
  accel/tcg: Replace direct use of io_readx/io_writex in do_{ld,st}_1
  accel/tcg: Merge cpu_transaction_failed into io_failed
  plugin: Simplify struct qemu_plugin_hwaddr
  accel/tcg: Use CPUTLBEntryFull.phys_addr in io_failed
  accel/tcg: Split out io_prepare and io_failed
  accel/tcg: Simplify tlb_plugin_lookup
  target/arm: Use tcg_gen_gvec_cmpi for compare vs 0
  tcg: Add gvec compare with immediate and scalar operand
  tcg/loongarch64: Implement 128-bit load & store
  tcg/loongarch64: Lower rotli_vec to vrotri
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2 files changed, 54 insertions, 1 deletions

diff --git a/tests/tcg/m68k/Makefile.target b/tests/tcg/m68k/Makefile.target
index 1163c7ef03..6ff214e60a 100644
--- a/tests/tcg/m68k/Makefile.target
+++ b/tests/tcg/m68k/Makefile.target
@@ -4,7 +4,7 @@
 #
 
 VPATH += $(SRC_PATH)/tests/tcg/m68k
-TESTS += trap
+TESTS += trap denormal
 
 # On m68k Linux supports 4k and 8k pages (but 8k is currently broken)
 EXTRA_RUNS+=run-test-mmap-4096 # run-test-mmap-8192
diff --git a/tests/tcg/m68k/denormal.c b/tests/tcg/m68k/denormal.c
new file mode 100644
index 0000000000..20bd8c7332
--- /dev/null
+++ b/tests/tcg/m68k/denormal.c
@@ -0,0 +1,53 @@
+/*
+ * Test m68k extended double denormals.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#define TEST(X, Y)  { X, Y, X * Y }
+
+static volatile long double test[][3] = {
+    TEST(0x1p+16383l, 0x1p-16446l),
+    TEST(0x1.1p-8223l, 0x1.1p-8224l),
+    TEST(1.0l, 0x1p-16383l),
+};
+
+#undef TEST
+
+static void dump_ld(const char *label, long double ld)
+{
+    union {
+        long double  d;
+        struct {
+            uint32_t exp:16;
+            uint32_t space:16;
+            uint32_t h;
+            uint32_t l;
+        };
+    } u;
+
+    u.d = ld;
+    printf("%12s: % -27La 0x%04x 0x%08x 0x%08x\n", label, u.d, u.exp, u.h, u.l);
+}
+
+int main(void)
+{
+    int i, n = sizeof(test) / sizeof(test[0]), err = 0;
+
+    for (i = 0; i < n; ++i) {
+        long double x = test[i][0];
+        long double y = test[i][1];
+        long double build_mul = test[i][2];
+        long double runtime_mul = x * y;
+
+        if (runtime_mul != build_mul) {
+            dump_ld("x", x);
+            dump_ld("y", y);
+            dump_ld("build_mul", build_mul);
+            dump_ld("runtime_mul", runtime_mul);
+            err = 1;
+        }
+    }
+    return err;
+}