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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
commit43a123c1ae6613b3efeed291fa552ecd909d3acf (patch)
treefd92518b7024bc74031f78a1cf9e454b65e73665 /src/runtime/cgo/asm_mipsx.s
parentInitial commit. (diff)
downloadgolang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz
golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/cgo/asm_mipsx.s')
-rw-r--r--src/runtime/cgo/asm_mipsx.s76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/runtime/cgo/asm_mipsx.s b/src/runtime/cgo/asm_mipsx.s
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+++ b/src/runtime/cgo/asm_mipsx.s
@@ -0,0 +1,76 @@
+// Copyright 2016 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.
+
+//go:build mips || mipsle
+// +build mips mipsle
+
+#include "textflag.h"
+
+// Called by C code generated by cmd/cgo.
+// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
+// Saves C callee-saved registers and calls cgocallback with three arguments.
+// fn is the PC of a func(a unsafe.Pointer) function.
+TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
+ /*
+ * We still need to save all callee save register as before, and then
+ * push 3 args for fn (R4, R5, R7), skipping R6.
+ * Also note that at procedure entry in gc world, 4(R29) will be the
+ * first arg.
+ */
+
+ // Space for 9 caller-saved GPR + LR + 6 caller-saved FPR.
+ // O32 ABI allows us to smash 16 bytes argument area of caller frame.
+#ifndef GOMIPS_softfloat
+ SUBU $(4*14+8*6-16), R29
+#else
+ SUBU $(4*14-16), R29 // For soft-float, no FPR.
+#endif
+ MOVW R4, (4*1)(R29) // fn unsafe.Pointer
+ MOVW R5, (4*2)(R29) // a unsafe.Pointer
+ MOVW R7, (4*3)(R29) // ctxt uintptr
+ MOVW R16, (4*4)(R29)
+ MOVW R17, (4*5)(R29)
+ MOVW R18, (4*6)(R29)
+ MOVW R19, (4*7)(R29)
+ MOVW R20, (4*8)(R29)
+ MOVW R21, (4*9)(R29)
+ MOVW R22, (4*10)(R29)
+ MOVW R23, (4*11)(R29)
+ MOVW g, (4*12)(R29)
+ MOVW R31, (4*13)(R29)
+#ifndef GOMIPS_softfloat
+ MOVD F20, (4*14)(R29)
+ MOVD F22, (4*14+8*1)(R29)
+ MOVD F24, (4*14+8*2)(R29)
+ MOVD F26, (4*14+8*3)(R29)
+ MOVD F28, (4*14+8*4)(R29)
+ MOVD F30, (4*14+8*5)(R29)
+#endif
+ JAL runtimeĀ·load_g(SB)
+
+ JAL runtimeĀ·cgocallback(SB)
+
+ MOVW (4*4)(R29), R16
+ MOVW (4*5)(R29), R17
+ MOVW (4*6)(R29), R18
+ MOVW (4*7)(R29), R19
+ MOVW (4*8)(R29), R20
+ MOVW (4*9)(R29), R21
+ MOVW (4*10)(R29), R22
+ MOVW (4*11)(R29), R23
+ MOVW (4*12)(R29), g
+ MOVW (4*13)(R29), R31
+#ifndef GOMIPS_softfloat
+ MOVD (4*14)(R29), F20
+ MOVD (4*14+8*1)(R29), F22
+ MOVD (4*14+8*2)(R29), F24
+ MOVD (4*14+8*3)(R29), F26
+ MOVD (4*14+8*4)(R29), F28
+ MOVD (4*14+8*5)(R29), F30
+
+ ADDU $(4*14+8*6-16), R29
+#else
+ ADDU $(4*14-16), R29
+#endif
+ RET