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

[Andrew Burgess]

* Stafford Horne <shorne@gmail.com> [2019-04-10 06:39:24 +0900]:

> 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.

This is fine.

Thanks,
Andrew


> ---
>  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
>