[dev.simd] all: merge master (adce7f1) into dev.simd

Conflicts:

- src/internal/goexperiment/flags.go
- src/runtime/export_test.go

Merge List:

+ 2025-10-03 adce7f196e cmd/link: support .def file with MSVC clang toolchain
+ 2025-10-03 d5b950399d cmd/cgo: fix unaligned arguments typedmemmove crash on iOS
+ 2025-10-02 53845004d6 net/http/httputil: deprecate ReverseProxy.Director
+ 2025-10-02 bbdff9e8e1 net/http: update bundled x/net/http2 and delete obsolete http2inTests
+ 2025-10-02 4008e07080 io/fs: move path name documentation up to the package doc comment
+ 2025-10-02 0e4e2e6832 runtime: skip TestGoroutineLeakProfile under mayMoreStackPreempt
+ 2025-10-02 f03c392295 runtime: fix aix/ppc64 library initialization
+ 2025-10-02 707454b41f cmd/go: update `go help mod edit` with the tool and ignore sections
+ 2025-10-02 8c68a1c1ab runtime,net/http/pprof: goroutine leak detection by using the garbage collector
+ 2025-10-02 84db201ae1 cmd/compile: propagate len([]T{}) to make builtin to allow stack allocation
+ 2025-10-02 5799c139a7 crypto/tls: rm marshalEncryptedClientHelloConfigList dead code
+ 2025-10-01 633dd1d475 encoding/json: fix Decoder.InputOffset regression in goexperiment.jsonv2
+ 2025-10-01 8ad27fb656 doc/go_spec.html: update date
+ 2025-10-01 3f451f2c54 testing/synctest: fix inverted test failure message in TestContextAfterFunc
+ 2025-10-01 be0fed8a5f cmd/go/testdata/script/test_fuzz_fuzztime.txt: disable
+ 2025-09-30 eb1c7f6e69 runtime: move loong64 library entry point to os-agnostic file
+ 2025-09-30 c9257151e5 runtime: unify ppc64/ppc64le library entry point
+ 2025-09-30 4ff8a457db test/codegen: codify handling of floating point constants on arm64
+ 2025-09-30 fcb893fc4b cmd/compile/internal/ssa: remove redundant "type:" prefix check
+ 2025-09-30 19cc1022ba mime: reduce allocs incurred by ParseMediaType
+ 2025-09-30 08afc50bea mime: extend "builtinTypes" to include a more complete list of common types
+ 2025-09-30 97da068774 cmd/compile: eliminate nil checks on .dict arg
+ 2025-09-30 300d9d2714 runtime: initialise debug settings much earlier in startup process
+ 2025-09-30 a846bb0aa5 errors: add AsType
+ 2025-09-30 7c8166d02d cmd/link/internal/arm64: support Mach-O ARM64_RELOC_SUBTRACTOR in internal linking
+ 2025-09-30 6e95748335 cmd/link/internal/arm64: support Mach-O ARM64_RELOC_POINTER_TO_GOT in internal linking
+ 2025-09-30 742f92063e cmd/compile, runtime: always enable Wasm signext and satconv features
+ 2025-09-30 db10db6be3 internal/poll: remove operation fields from FD
+ 2025-09-29 75c87df58e internal/poll: pass the I/O mode instead of an overlapped object in execIO
+ 2025-09-29 fc88e18b4a crypto/internal/fips140/entropy: add CPU jitter-based entropy source
+ 2025-09-29 db4fade759 crypto/internal/fips140/mlkem: make CAST conditional
+ 2025-09-29 db3cb3fd9a runtime: correct reference to getStackMap in comment
+ 2025-09-29 690fc2fb05 internal/poll: remove buf field from operation
+ 2025-09-29 eaf2345256 cmd/link: use a .def file to mark exported symbols on Windows
+ 2025-09-29 4b77733565 internal/syscall/windows: regenerate GetFileSizeEx
+ 2025-09-29 4e9006a716 crypto/tls: quote protocols in ALPN error message
+ 2025-09-29 047c2ab841 cmd/link: don't pass -Wl,-S on Solaris
+ 2025-09-29 ae8eba071b cmd/link: use correct length for pcln.cutab
+ 2025-09-29 fe3ba74b9e cmd/link: skip TestFlagW on platforms without DWARF symbol table
+ 2025-09-29 d42d56b764 encoding/xml: make use of reflect.TypeAssert
+ 2025-09-29 6d51f93257 runtime: jump instead of branch in netbsd/arm64 entry point
+ 2025-09-28 5500cbf0e4 debug/elf: prevent offset overflow
+ 2025-09-27 34e67623a8 all:  fix typos
+ 2025-09-27 af6999e60d cmd/compile: implement jump table on loong64
+ 2025-09-26 63cd912083 os/user: simplify go:build
+ 2025-09-26 53009b26dd runtime: use a smaller arena size on Wasm
+ 2025-09-26 3a5df9d2b2 net/http: add HTTP2Config.StrictMaxConcurrentRequests
+ 2025-09-26 16be34df02 net/http: add more tests of transport connection pool
+ 2025-09-26 3e4540b49d os/user: use getgrouplist on illumos && cgo
+ 2025-09-26 15fbe3480b internal/poll: simplify WriteMsg and ReadMsg on Windows
+ 2025-09-26 16ae11a9e1 runtime: move TestReadMetricsSched to testprog
+ 2025-09-26 459f3a3adc cmd/link: don't pass -Wl,-S on AIX
+ 2025-09-26 4631a2d3c6 cmd/link: skip TestFlagW on AIX
+ 2025-09-26 0f31d742cd cmd/compile: fix ICE with new(<untyped expr>)
+ 2025-09-26 7d7cd6e07b internal/poll: don't call SetFilePointerEx in Seek for overlapped handles
+ 2025-09-26 41cba31e66 mime/multipart: percent-encode CR and LF in header values to avoid CRLF injection
+ 2025-09-26 dd1d597c3a Revert "cmd/internal/obj/loong64: use the MOVVP instruction to optimize prologue"
+ 2025-09-26 45d6bc76af runtime: unify arm64 entry point code
+ 2025-09-25 fdea7da3e6 runtime: use common library entry point on windows amd64/386
+ 2025-09-25 e8a4f508d1 lib/fips140: re-seal v1.0.0
+ 2025-09-25 9b7a328089 crypto/internal/fips140: remove key import PCTs, make keygen PCTs fatal
+ 2025-09-25 7f9ab7203f crypto/internal/fips140: update frozen module version to "v1.0.0"
+ 2025-09-25 fb5719cbda crypto/internal/fips140/ecdsa: make TestingOnlyNewDRBG generic
+ 2025-09-25 56067e31f2 std: remove unused declarations

Change-Id: Iecb28fd62c69fbed59da557f46d31bae55889e2c

3 files changed, 69 insertions, 4 deletions

diff --git a/test/codegen/floats.go b/test/codegen/floats.go
index 29969c8dc0..666c983b56 100644
--- a/test/codegen/floats.go
+++ b/test/codegen/floats.go
@@ -217,14 +217,36 @@ func Float32Max(a, b float32) float32 {
 //  Constant Optimizations  //
 // ------------------------ //
 
+func Float32ConstantZero() float32 {
+	// arm64:"FMOVS\tZR,"
+	return 0.0
+}
+
+func Float32ConstantChipFloat() float32 {
+	// arm64:"FMOVS\t[$]\\(2\\.25\\),"
+	return 2.25
+}
+
 func Float32Constant() float32 {
+	// arm64:"FMOVS\t[$]f32\\.42440000\\(SB\\)"
 	// ppc64x/power8:"FMOVS\t[$]f32\\.42440000\\(SB\\)"
 	// ppc64x/power9:"FMOVS\t[$]f32\\.42440000\\(SB\\)"
 	// ppc64x/power10:"XXSPLTIDP\t[$]1111752704,"
 	return 49.0
 }
 
+func Float64ConstantZero() float64 {
+	// arm64:"FMOVD\tZR,"
+	return 0.0
+}
+
+func Float64ConstantChipFloat() float64 {
+	// arm64:"FMOVD\t[$]\\(2\\.25\\),"
+	return 2.25
+}
+
 func Float64Constant() float64 {
+	// arm64:"FMOVD\t[$]f64\\.4048800000000000\\(SB\\)"
 	// ppc64x/power8:"FMOVD\t[$]f64\\.4048800000000000\\(SB\\)"
 	// ppc64x/power9:"FMOVD\t[$]f64\\.4048800000000000\\(SB\\)"
 	// ppc64x/power10:"XXSPLTIDP\t[$]1111752704,"
@@ -244,11 +266,12 @@ func Float64DenormalFloat32Constant() float64 {
 	return 0x1p-127
 }
 
-func Float64ConstantStore(p *float64) {
-	// amd64: "MOVQ\t[$]4617801906721357038"
+func Float32ConstantStore(p *float32) {
+	// amd64:"MOVL\t[$]1085133554"
 	*p = 5.432
 }
-func Float32ConstantStore(p *float32) {
-	// amd64: "MOVL\t[$]1085133554"
+
+func Float64ConstantStore(p *float64) {
+	// amd64:"MOVQ\t[$]4617801906721357038"
 	*p = 5.432
 }
diff --git a/test/codegen/generics.go b/test/codegen/generics.go
new file mode 100644
index 0000000000..45c4ca8d6a
--- /dev/null
+++ b/test/codegen/generics.go
@@ -0,0 +1,40 @@
+// asmcheck
+
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package codegen
+
+import "cmp"
+
+func isNaN[T cmp.Ordered](x T) bool {
+	return x != x
+}
+
+func compare[T cmp.Ordered](x, y T) int {
+	// amd64:-"TESTB"
+	// arm64:-"MOVB"
+	xNaN := isNaN(x)
+	yNaN := isNaN(y)
+	if xNaN {
+		if yNaN {
+			return 0
+		}
+		return -1
+	}
+	if yNaN {
+		return +1
+	}
+	if x < y {
+		return -1
+	}
+	if x > y {
+		return +1
+	}
+	return 0
+}
+
+func usesCompare(a, b int) int {
+	return compare(a, b)
+}
diff --git a/test/codegen/switch.go b/test/codegen/switch.go
index 509343110a..1a66a5ddf8 100644
--- a/test/codegen/switch.go
+++ b/test/codegen/switch.go
@@ -25,6 +25,7 @@ func f(x string) int {
 func square(x int) int {
 	// amd64:`JMP\s\(.*\)\(.*\)$`
 	// arm64:`MOVD\s\(R.*\)\(R.*<<3\)`,`JMP\s\(R.*\)$`
+	// loong64: `ALSLV`,`MOVV`,`JMP`
 	switch x {
 	case 1:
 		return 1
@@ -51,6 +52,7 @@ func square(x int) int {
 func length(x string) int {
 	// amd64:`JMP\s\(.*\)\(.*\)$`
 	// arm64:`MOVD\s\(R.*\)\(R.*<<3\)`,`JMP\s\(R.*\)$`
+	// loong64:`ALSLV`,`MOVV`,`JMP`
 	switch x {
 	case "a":
 		return 1