[PATCH v2 5/6] sim/or1k: Add test for 64-bit fpu operations

[Stafford Horne <shorne@gmail.com>]

This is a very basic test but it ensure the machine is wired up
correctly and that the assembler works.

sim/testsuite/sim/or1k/ChangeLog:

	* fpu64a32.S: New file.
---
 sim/testsuite/sim/or1k/fpu64a32.S | 172 ++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 sim/testsuite/sim/or1k/fpu64a32.S

diff --git a/sim/testsuite/sim/or1k/fpu64a32.S b/sim/testsuite/sim/or1k/fpu64a32.S
new file mode 100644
index 0000000000..6c40170854
--- /dev/null
+++ b/sim/testsuite/sim/or1k/fpu64a32.S
@@ -0,0 +1,172 @@
+/* Tests some basic fpu instructions.
+
+   Copyright (C) 2017-2019 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+# mach: or1k
+# output: report(0x400921f9);\n
+# output: report(0xf01b866e);\n
+# output: report(0x4005bf09);\n
+# output: report(0x95aaf790);\n
+# output: report(0x00000000);\n
+# output: report(0x00001234);\n
+# output: \n
+# output: report(0x40b23400);\n
+# output: report(0x00000000);\n
+# output: report(0x40b23400);\n
+# output: report(0x00000000);\n
+# output: \n
+# output: report(0x40177081);\n
+# output: report(0xc2e33eff);\n
+# output: report(0x400921f9);\n
+# output: report(0xf01b866e);\n
+# output: \n
+# output: report(0x40211456);\n
+# output: report(0x587dfabf);\n
+# output: report(0x400921f9);\n
+# output: report(0xf01b866d);\n
+# output: \n
+# output: report(0x00000001);\n
+# output: \n
+# output: WARNING: ignoring fpu error caught in fast mode.\n
+# output: report(0x00000000);\n
+# output: \n
+# output: exit(0)\n
+
+#include "or1k-asm-test-helpers.h"
+
+	STANDARD_TEST_ENVIRONMENT
+
+	.section .exception_vectors
+
+	/* Floating point exception.  */
+	.org	0xd00
+
+	/* The handling is a bit dubious at present.  We just patch the
+	   instruction with l.nop and restart.  This will go wrong in branch
+	   delay slots.  But we don't have those in this test.  */
+	l.addi r1, r1, -EXCEPTION_STACK_SKIP_SIZE
+	PUSH r2
+	PUSH r3
+	/* Save the address of the instruction that caused the problem.  */
+	MOVE_FROM_SPR r2, SPR_EPCR_BASE
+	LOAD_IMMEDIATE r3, 0x15000000 /* Opcode for l.nop  */
+	l.sw	-4(r2), r3
+	POP r3
+	POP r2
+	l.addi r1, r1, EXCEPTION_STACK_SKIP_SIZE
+	l.rfe
+
+	.section .data
+	.align 4
+	.type   pi, @object
+	.size   pi, 8
+anchor:
+pi:
+	.double  3.14159
+
+	.type   e, @object
+	.size   e, 8
+e:
+	.double  2.71828
+
+	.type   large, @object
+	.size   large, 8
+large:
+	.long  0
+	.long  0x1234
+
+	.section .text
+start_tests:
+	PUSH LINK_REGISTER_R9
+
+	/* Test lf.itof.d int to double conversion.  Setting up:
+	 *  r11      pointer to data
+	 *  r12,r13  pi as double
+	 *  r14,r15  e  as double
+	 *  r16,r17  a long long
+	 */
+	l.ori	r11, r0, ha(anchor)
+	l.addi	r11, r11, lo(anchor)
+	l.lwz	r12, 0(r11)
+	l.lwz	r13, 4(r11)
+
+	l.lwz	r14, 8(r11)
+	l.lwz	r15, 12(r11)
+
+	l.lwz	r16, 16(r11)
+	l.lwz	r18, 20(r11)
+
+	/* Output to ensure we loaded it correctly.  */
+	REPORT_REG_TO_CONSOLE r12
+	REPORT_REG_TO_CONSOLE r13
+
+	REPORT_REG_TO_CONSOLE r14
+	REPORT_REG_TO_CONSOLE r15
+
+	REPORT_REG_TO_CONSOLE r16
+	REPORT_REG_TO_CONSOLE r18
+	PRINT_NEWLINE_TO_CONSOLE
+
+	/* Convert the big long to a double. */
+	lf.itof.d r16, r16
+	REPORT_REG_TO_CONSOLE r16
+	REPORT_REG_TO_CONSOLE r18
+
+	/* Convert the double back to a long, it should match before. */
+	lf.ftoi.d r16, r16
+	lf.itof.d r16, r16
+
+	REPORT_REG_TO_CONSOLE r16
+	REPORT_REG_TO_CONSOLE r18
+
+	PRINT_NEWLINE_TO_CONSOLE
+
+	/* Add and subtract some double values.  */
+	lf.add.d r12, r12, r14
+	REPORT_REG_TO_CONSOLE r12
+	REPORT_REG_TO_CONSOLE r13
+
+	lf.sub.d r12, r12, r14
+	REPORT_REG_TO_CONSOLE r12
+	REPORT_REG_TO_CONSOLE r13
+	PRINT_NEWLINE_TO_CONSOLE
+
+	/* Multiply and divide double values.  */
+	lf.mul.d r12, r12, r14
+	REPORT_REG_TO_CONSOLE r12
+	REPORT_REG_TO_CONSOLE r13
+
+	lf.div.d r12, r12, r14
+	REPORT_REG_TO_CONSOLE r12
+	REPORT_REG_TO_CONSOLE r13
+	PRINT_NEWLINE_TO_CONSOLE
+
+	/* Test lf.sfge.s set flag if r6 >= r10.  */
+	lf.sfge.d r12, r14
+	MOVE_FROM_SPR r2, SPR_SR
+	REPORT_BIT_TO_CONSOLE r2, SPR_SR_F
+	PRINT_NEWLINE_TO_CONSOLE
+
+	/* Test raising an exception by dividing by 0.  */
+	MOVE_FROM_SPR r2, SPR_FPCSR
+	l.ori	r2, r2, 0x1
+	MOVE_TO_SPR SPR_FPCSR, r2
+div0:	lf.div.d r2, r12, r0
+	REPORT_EXCEPTION div0
+	PRINT_NEWLINE_TO_CONSOLE
+
+	POP LINK_REGISTER_R9
+	RETURN_TO_LINK_REGISTER_R9
-- 
2.19.1