From 54e1c0f1305665318b82e41baceeea137c3e61e9 Mon Sep 17 00:00:00 2001
From: Richard Kreckel <kreckel@ginac.de>
Date: Thu, 9 Mar 2000 14:28:02 +0000
Subject: [PATCH] - src/base/digitseq/cl_asm_mips_.cc: Starting at argument 5
 the parameter passing was changed for the MIPS n32 ABI.

---
 ChangeLog                         |  5 +++++
 src/base/digitseq/cl_asm_mips_.cc | 25 ++++++++++++++++++++++---
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 997e797..fcd2578 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2000-02-22  Bruno Haible  <haible@clisp.cons.org>
+
+        * src/base/digitseq/cl_asm_mips_.cc: Starting at argument 5 the
+          parameter passing was changed for the MIPS n32 ABI.
+
 2000-01-24  Richard Kreckel  <kreckel@ginac.de>
 
         * gmp/*: Replaced the complete mpn sources with the ones from
diff --git a/src/base/digitseq/cl_asm_mips_.cc b/src/base/digitseq/cl_asm_mips_.cc
index a057c22..0f23dab 100644
--- a/src/base/digitseq/cl_asm_mips_.cc
+++ b/src/base/digitseq/cl_asm_mips_.cc
@@ -2,12 +2,23 @@
 // Prozessor: MIPS
 // Endianness: irrelevant
 // Compiler: GNU-C oder ...
-// Parameter-Übergabe: in Registern $4,$5,$6,$7, und auf dem Stack 16($sp),...
+// Parameter-Übergabe:
+//   o32: in Registern $4,$5,$6,$7, und auf dem Stack 16($sp),...
+//   n32: in Registern $4,$5,$6,$7,$8,$9,$10,$11, und auf dem Stack 4($sp),...
 // Rückgabewert: in Register $2
 // Einstellungen: intCsize=32, intDsize=32.
 // Besonderheiten: Nach jedem Ladebefehl ein Wartetakt nötig, bevor der
 //   geholte Wert benutzt werden darf.
 
+// Strictly speaking, the MIPS ABI (-32 or -n32) is independent from the CPU
+// identification (-mips[12] or -mips[34]). But -n32 is commonly used together
+// with -mips3, and it's easier to test the CPU identification.
+#if __mips >= 3
+  #define ABI_N32 1
+#else
+  #define ABI_O32 1
+#endif
+
 // When this file is compiled into a shared library, ELF linkers need to
 // know which symbols are functions.
 #if defined(__GNU__) || defined(__NetBSD__)
@@ -531,9 +542,13 @@ sld4:     subu $12,$13          // dest = source1 - source2
 // extern uintD subx_loop_down (uintD* sourceptr1, uintD* sourceptr2, uintD* destptr, uintC count, uintD carry);
         .align 2
         DECLARE_FUNCTION(subx_loop_down)
-        .ent subx_loop_down // Input in $4,$5,$6,$7, Output in $2
+        .ent subx_loop_down // Input in $4,$5,$6,$7,$8 Output in $2
 subx_loop_down:
+#if ABI_N32
+        move $12,$8             // carry
+#else
         lw $12,16($sp)          // carry
+#endif
         bnez $12,sxld5          // !(carry==0) ?
         b sxld2
 sxld1:    // kein Carry
@@ -995,9 +1010,13 @@ slu4:     subu $12,$13          // dest = source1 - source2
 // extern uintD subx_loop_up (uintD* sourceptr1, uintD* sourceptr2, uintD* destptr, uintC count, uintD carry);
         .align 2
         DECLARE_FUNCTION(subx_loop_up)
-        .ent subx_loop_up // Input in $4,$5,$6,$7, Output in $2
+        .ent subx_loop_up // Input in $4,$5,$6,$7,$8, Output in $2
 subx_loop_up:
+#if ABI_N32
+        move $12,$8             // carry
+#else
         lw $12,16($sp)          // carry
+#endif
         bnez $12,sxlu5          // !(carry==0) ?
         b sxlu2
 sxlu1:    // kein Carry