https://gcc.gnu.org/g:79186e392c77c1862197a49421f77644e3b8c05d
commit r15-7111-g79186e392c77c1862197a49421f77644e3b8c05d
Author: Iain Buclaw <ibuc...@gdcproject.org>
Date: Tue Jan 21 19:41:05 2025 +0100
libphobos: Add MIPS64 implementation of fiber_switchContext [PR118584]
Replaces the generic implementation. The `core.thread.fiber' module
already defines version=AsmExternal on mips64el-linux-gnuabi64.
PR d/118584
libphobos/ChangeLog:
* libdruntime/config/mips/switchcontext.S: Add MIPS64 N64 ABI
implementation of fiber_switchContext.
Diff:
---
libphobos/libdruntime/config/mips/switchcontext.S | 78 +++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/libphobos/libdruntime/config/mips/switchcontext.S
b/libphobos/libdruntime/config/mips/switchcontext.S
index d2fed64c78c1..078ad0b3cce3 100644
--- a/libphobos/libdruntime/config/mips/switchcontext.S
+++ b/libphobos/libdruntime/config/mips/switchcontext.S
@@ -99,4 +99,82 @@ fiber_switchContext:
.end fiber_switchContext
.size fiber_switchContext,.-fiber_switchContext
+#endif /* _MIPS_SIM == _ABIO32 */
+
+#if defined(__mips64) && _MIPS_SIM == _ABI64
+/************************************************************************************
+ * MIPS 64 ASM BITS
+ * $a0 - void** - ptr to old stack pointer
+ * $a1 - void* - new stack pointer
+ *
+ */
+ .text
+ .globl fiber_switchContext
+ .align 2
+ .ent fiber_switchContext,0
+fiber_switchContext:
+ .cfi_startproc
+ daddiu $sp, $sp, -(10 * 8)
+
+ // fp regs and return address are stored below the stack
+ // because we don't want the GC to scan them.
+
+#ifdef __mips_hard_float
+#define BELOW (8 * 8 + 8)
+ s.d $f24, (0 * 8 - BELOW)($sp)
+ s.d $f25, (1 * 8 - BELOW)($sp)
+ s.d $f26, (2 * 8 - BELOW)($sp)
+ s.d $f27, (3 * 8 - BELOW)($sp)
+ s.d $f28, (4 * 8 - BELOW)($sp)
+ s.d $f29, (5 * 8 - BELOW)($sp)
+ s.d $f30, (6 * 8 - BELOW)($sp)
+ s.d $f31, (7 * 8 - BELOW)($sp)
+#endif
+ sd $ra, -8($sp)
+
+ sd $s0, (0 * 8)($sp)
+ sd $s1, (1 * 8)($sp)
+ sd $s2, (2 * 8)($sp)
+ sd $s3, (3 * 8)($sp)
+ sd $s4, (4 * 8)($sp)
+ sd $s5, (5 * 8)($sp)
+ sd $s6, (6 * 8)($sp)
+ sd $s7, (7 * 8)($sp)
+ sd $gp, (8 * 8)($sp)
+ sd $fp, (9 * 8)($sp)
+
+ // swap stack pointer
+ sd $sp, 0($a0)
+ move $sp, $a1
+
+#ifdef __mips_hard_float
+ l.d $f24, (0 * 8 - BELOW)($sp)
+ l.d $f25, (1 * 8 - BELOW)($sp)
+ l.d $f26, (2 * 8 - BELOW)($sp)
+ l.d $f27, (3 * 8 - BELOW)($sp)
+ l.d $f28, (4 * 8 - BELOW)($sp)
+ l.d $f29, (5 * 8 - BELOW)($sp)
+ l.d $f30, (6 * 8 - BELOW)($sp)
+ l.d $f31, (7 * 8 - BELOW)($sp)
#endif
+ ld $ra, -8($sp)
+
+ ld $s0, (0 * 8)($sp)
+ ld $s1, (1 * 8)($sp)
+ ld $s2, (2 * 8)($sp)
+ ld $s3, (3 * 8)($sp)
+ ld $s4, (4 * 8)($sp)
+ ld $s5, (5 * 8)($sp)
+ ld $s6, (6 * 8)($sp)
+ ld $s7, (7 * 8)($sp)
+ ld $gp, (8 * 8)($sp)
+ ld $fp, (9 * 8)($sp)
+
+ daddiu $sp, $sp, (10 * 8)
+
+ jr $ra // return
+ .cfi_endproc
+ .end fiber_switchContext
+ .size fiber_switchContext,.-fiber_switchContext
+
+#endif /* defined(__mips64) && _MIPS_SIM == _ABI64 */
