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Add support for the Zfa ISA extension
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This patch introduces the RISC-V Zfa extension, which introduces
additional floating-point extensions:
* fli (load-immediate) with pre-defined immediates
* fminm/fmaxm (like fmin/fmax but with different NaN behaviour)
* fround/froundmx (round to integer)
* fcvtmod.w.d (Modular Convert-to-Integer)
* fmv* to access high bits of float register bigger than XLEN
* Quiet comparison instructions (fleq/fltq)

Zfa defines its instructions in combination with the following
extensions:
* single-precision floating-point (F)
* double-precision floating-point (D)
* quad-precision floating-point (Q)
* half-precision floating-point (Zfh)

Since the RISC-V architecture test framework does not support
the RISC-V quad-precision floating-point ISA extension (Q) and
the RISC-V half-precision floating-point ISA extension (Zfh),
this patch does not include tests for instructions that depend
on these extensions.

Given missing infrastructure support, the fli.* instruction tests
are hand written and not generated.
All other test files are generated using riscv-ctg.

The generated test files have been generated using the following
command (with $BASEISA={rv32i,rv64i} and $FLEN={32,64}):
      riscv_ctg.py \
        --cgf coverage/dataset.cgf \
        --cgf coverage/zicond.cgf \
        --base-isa $BASEISA \
        --flen $FLEN \
        -d tests_$BASEISA_$FLEN/

Exceptions are:
* fcvtmod.w.d.cgf is for FLEN=32 only
* fmvh.x.d and fmvp.d.x are for BASEISA=rv32i only

The resulting tests have been copied to the target directory.

The generation of the Zfa test cases depends on a PR in the riscv-ctg
repository:
  riscv-software-src/riscv-ctg#60

The Zfa specification is not frozen at the moment (which is why this
patch is RFC) and can be found here:
https://github.com/riscv/riscv-isa-manual/blob/master/src/zfa.tex

Signed-off-by: Christoph Müllner <[email protected]>
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@cmuellner
cmuellner committed May 10, 2023
1 parent a3b7f0c commit d310dd7
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3 changes: 3 additions & 0 deletions CHANGELOG.md
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# CHANGELOG

## [3.6.3] - 2023-04-06
- Add Zfa support.

## [3.6.2] - 2023-02-08
- Remove RV64IB from ISA list of zext test.

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320 changes: 320 additions & 0 deletions riscv-test-suite/rv32i_m/D_Zfa/src/fcvtmod.w.d_b1-01.S
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// -----------
// This file was generated by riscv_ctg (https://github.com/riscv-software-src/riscv-ctg)
// version : 0.10.3
// timestamp : Thu Apr 6 11:45:50 2023 GMT
// usage : riscv_ctg \
// -- cgf // --cgf /home/cm/src/riscv-ctg/zfa/sample_cgfs/dataset.cgf \
// --cgf /home/cm/src/riscv-ctg/zfa/sample_cgfs/zfa/fcvtmod.w.d.cgf \
\
// -- xlen 32 \
// -----------
//
// -----------
// Copyright (c) 2020. RISC-V International. All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
// -----------
//
// This assembly file tests the fcvtmod.w.d instruction of the RISC-V RV32FD_Zicsr_Zfa,RV64FD_Zicsr_Zfa extension for the fcvtmod.w.d_b1 covergroup.
//
#include "model_test.h"
#include "arch_test.h"
RVTEST_ISA("RV32IFD_Zicsr_Zfa,RV64IFD_Zicsr_Zfa")

.section .text.init
.globl rvtest_entry_point
rvtest_entry_point:
RVMODEL_BOOT
RVTEST_CODE_BEGIN

#ifdef TEST_CASE_1

RVTEST_CASE(0,"//check ISA:=regex(.*I.*D.*Zfa.*);def TEST_CASE_1=True;",fcvtmod.w.d_b1)

RVTEST_FP_ENABLE()
RVTEST_VALBASEUPD(x3,test_dataset_0)
RVTEST_SIGBASE(x1,signature_x1_1)

inst_0:// rs1==f31, rd==x31,fs1 == 0 and fe1 == 0x000 and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f31; dest:x31; op1val:0x0; valaddr_reg:x3;
val_offset:0*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x31, f31, rtz, 0, 0, x3, 0*FLEN/8, x4, x1, x2,FLREG)

inst_1:// rs1==f30, rd==x30,fs1 == 1 and fe1 == 0x000 and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f30; dest:x30; op1val:0x8000000000000000; valaddr_reg:x3;
val_offset:1*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x30, f30, rtz, 0, 0, x3, 1*FLEN/8, x4, x1, x2,FLREG)

inst_2:// rs1==f29, rd==x29,fs1 == 0 and fe1 == 0x000 and fm1 == 0x0000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f29; dest:x29; op1val:0x1; valaddr_reg:x3;
val_offset:2*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x29, f29, rtz, 0, 0, x3, 2*FLEN/8, x4, x1, x2,FLREG)

inst_3:// rs1==f28, rd==x28,fs1 == 1 and fe1 == 0x000 and fm1 == 0x0000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f28; dest:x28; op1val:0x8000000000000001; valaddr_reg:x3;
val_offset:3*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x28, f28, rtz, 0, 0, x3, 3*FLEN/8, x4, x1, x2,FLREG)

inst_4:// rs1==f27, rd==x27,fs1 == 0 and fe1 == 0x000 and fm1 == 0x0000000000002 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f27; dest:x27; op1val:0x2; valaddr_reg:x3;
val_offset:4*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x27, f27, rtz, 0, 0, x3, 4*FLEN/8, x4, x1, x2,FLREG)

inst_5:// rs1==f26, rd==x26,fs1 == 1 and fe1 == 0x000 and fm1 == 0x0000000000002 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f26; dest:x26; op1val:0x8000000000000002; valaddr_reg:x3;
val_offset:5*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x26, f26, rtz, 0, 0, x3, 5*FLEN/8, x4, x1, x2,FLREG)

inst_6:// rs1==f25, rd==x25,fs1 == 0 and fe1 == 0x000 and fm1 == 0xfffffffffffff and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f25; dest:x25; op1val:0xfffffffffffff; valaddr_reg:x3;
val_offset:6*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x25, f25, rtz, 0, 0, x3, 6*FLEN/8, x4, x1, x2,FLREG)

inst_7:// rs1==f24, rd==x24,fs1 == 1 and fe1 == 0x000 and fm1 == 0xfffffffffffff and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f24; dest:x24; op1val:0x800fffffffffffff; valaddr_reg:x3;
val_offset:7*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x24, f24, rtz, 0, 0, x3, 7*FLEN/8, x4, x1, x2,FLREG)

inst_8:// rs1==f23, rd==x23,fs1 == 0 and fe1 == 0x001 and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f23; dest:x23; op1val:0x10000000000000; valaddr_reg:x3;
val_offset:8*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x23, f23, rtz, 0, 0, x3, 8*FLEN/8, x4, x1, x2,FLREG)

inst_9:// rs1==f22, rd==x22,fs1 == 1 and fe1 == 0x001 and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f22; dest:x22; op1val:0x8010000000000000; valaddr_reg:x3;
val_offset:9*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x22, f22, rtz, 0, 0, x3, 9*FLEN/8, x4, x1, x2,FLREG)

inst_10:// rs1==f21, rd==x21,fs1 == 0 and fe1 == 0x001 and fm1 == 0x0000000000002 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f21; dest:x21; op1val:0x10000000000002; valaddr_reg:x3;
val_offset:10*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x21, f21, rtz, 0, 0, x3, 10*FLEN/8, x4, x1, x2,FLREG)

inst_11:// rs1==f20, rd==x20,fs1 == 1 and fe1 == 0x001 and fm1 == 0x0000000000002 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f20; dest:x20; op1val:0x8010000000000002; valaddr_reg:x3;
val_offset:11*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x20, f20, rtz, 0, 0, x3, 11*FLEN/8, x4, x1, x2,FLREG)

inst_12:// rs1==f19, rd==x19,fs1 == 0 and fe1 == 0x7fe and fm1 == 0xfffffffffffff and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f19; dest:x19; op1val:0x7fefffffffffffff; valaddr_reg:x3;
val_offset:12*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x19, f19, rtz, 0, 0, x3, 12*FLEN/8, x4, x1, x2,FLREG)

inst_13:// rs1==f18, rd==x18,fs1 == 1 and fe1 == 0x7fe and fm1 == 0xfffffffffffff and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f18; dest:x18; op1val:0xffefffffffffffff; valaddr_reg:x3;
val_offset:13*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x18, f18, rtz, 0, 0, x3, 13*FLEN/8, x4, x1, x2,FLREG)

inst_14:// rs1==f17, rd==x17,fs1 == 0 and fe1 == 0x7ff and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f17; dest:x17; op1val:0x7ff0000000000000; valaddr_reg:x3;
val_offset:14*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x17, f17, rtz, 0, 0, x3, 14*FLEN/8, x4, x1, x2,FLREG)

inst_15:// rs1==f16, rd==x16,fs1 == 1 and fe1 == 0x7ff and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f16; dest:x16; op1val:0xfff0000000000000; valaddr_reg:x3;
val_offset:15*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x16, f16, rtz, 0, 0, x3, 15*FLEN/8, x4, x1, x2,FLREG)

inst_16:// rs1==f15, rd==x15,fs1 == 0 and fe1 == 0x7ff and fm1 == 0x8000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f15; dest:x15; op1val:0x7ff8000000000000; valaddr_reg:x3;
val_offset:16*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x15, f15, rtz, 0, 0, x3, 16*FLEN/8, x4, x1, x2,FLREG)

inst_17:// rs1==f14, rd==x14,fs1 == 1 and fe1 == 0x7ff and fm1 == 0x8000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f14; dest:x14; op1val:0xfff8000000000000; valaddr_reg:x3;
val_offset:17*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x14, f14, rtz, 0, 0, x3, 17*FLEN/8, x4, x1, x2,FLREG)

inst_18:// rs1==f13, rd==x13,fs1 == 0 and fe1 == 0x7ff and fm1 == 0x8000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f13; dest:x13; op1val:0x7ff8000000000001; valaddr_reg:x3;
val_offset:18*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x13, f13, rtz, 0, 0, x3, 18*FLEN/8, x4, x1, x2,FLREG)

inst_19:// rs1==f12, rd==x12,fs1 == 1 and fe1 == 0x7ff and fm1 == 0x8000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f12; dest:x12; op1val:0xfff8000000000001; valaddr_reg:x3;
val_offset:19*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x12, f12, rtz, 0, 0, x3, 19*FLEN/8, x4, x1, x2,FLREG)

inst_20:// rs1==f11, rd==x11,fs1 == 0 and fe1 == 0x7ff and fm1 == 0x0000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f11; dest:x11; op1val:0x7ff0000000000001; valaddr_reg:x3;
val_offset:20*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x11, f11, rtz, 0, 0, x3, 20*FLEN/8, x4, x1, x2,FLREG)

inst_21:// rs1==f10, rd==x10,fs1 == 1 and fe1 == 0x7ff and fm1 == 0x0000000000001 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f10; dest:x10; op1val:0xfff0000000000001; valaddr_reg:x3;
val_offset:21*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x10, f10, rtz, 0, 0, x3, 21*FLEN/8, x4, x1, x2,FLREG)

inst_22:// rs1==f9, rd==x9,fs1 == 0 and fe1 == 0x3ff and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f9; dest:x9; op1val:0x3ff0000000000000; valaddr_reg:x3;
val_offset:22*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x9, f9, rtz, 0, 0, x3, 22*FLEN/8, x4, x1, x2,FLREG)

inst_23:// rs1==f8, rd==x8,fs1 == 1 and fe1 == 0x3f8 and fm1 == 0x0000000000000 and fcsr == 0x0 and rm_val == 7
/* opcode: fcvtmod.w.d ; op1:f8; dest:x8; op1val:0xbf80000000000000; valaddr_reg:x3;
val_offset:23*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x8, f8, rtz, 0, 0, x3, 23*FLEN/8, x4, x1, x2,FLREG)
RVTEST_VALBASEUPD(x8,test_dataset_1)

inst_24:// rs1==f7, rd==x7,
/* opcode: fcvtmod.w.d ; op1:f7; dest:x7; op1val:0x0; valaddr_reg:x8;
val_offset:0*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x7, f7, rtz, 0, 0, x8, 0*FLEN/8, x9, x1, x2,FLREG)

inst_25:// rs1==f6, rd==x6,
/* opcode: fcvtmod.w.d ; op1:f6; dest:x6; op1val:0x0; valaddr_reg:x8;
val_offset:1*FLEN/8; rmval:rtz; correctval:??; testreg:x2;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x6, f6, rtz, 0, 0, x8, 1*FLEN/8, x9, x1, x2,FLREG)

inst_26:// rs1==f5, rd==x5,
/* opcode: fcvtmod.w.d ; op1:f5; dest:x5; op1val:0x0; valaddr_reg:x8;
val_offset:2*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x5, f5, rtz, 0, 0, x8, 2*FLEN/8, x9, x1, x6,FLREG)
RVTEST_SIGBASE(x5,signature_x5_0)

inst_27:// rs1==f4, rd==x4,
/* opcode: fcvtmod.w.d ; op1:f4; dest:x4; op1val:0x0; valaddr_reg:x8;
val_offset:3*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x4, f4, rtz, 0, 0, x8, 3*FLEN/8, x9, x5, x6,FLREG)

inst_28:// rs1==f3, rd==x3,
/* opcode: fcvtmod.w.d ; op1:f3; dest:x3; op1val:0x0; valaddr_reg:x8;
val_offset:4*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x3, f3, rtz, 0, 0, x8, 4*FLEN/8, x9, x5, x6,FLREG)

inst_29:// rs1==f2, rd==x2,
/* opcode: fcvtmod.w.d ; op1:f2; dest:x2; op1val:0x0; valaddr_reg:x8;
val_offset:5*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x2, f2, rtz, 0, 0, x8, 5*FLEN/8, x9, x5, x6,FLREG)

inst_30:// rs1==f1, rd==x1,
/* opcode: fcvtmod.w.d ; op1:f1; dest:x1; op1val:0x0; valaddr_reg:x8;
val_offset:6*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x1, f1, rtz, 0, 0, x8, 6*FLEN/8, x9, x5, x6,FLREG)

inst_31:// rs1==f0, rd==x0,
/* opcode: fcvtmod.w.d ; op1:f0; dest:x0; op1val:0x0; valaddr_reg:x8;
val_offset:7*FLEN/8; rmval:rtz; correctval:??; testreg:x6;
fcsr_val:0*/
TEST_FPID_OP(fcvtmod.w.d, x0, f0, rtz, 0, 0, x8, 7*FLEN/8, x9, x5, x6,FLREG)
#endif


RVTEST_CODE_END
RVMODEL_HALT

RVTEST_DATA_BEGIN
.align 4
rvtest_data:
.word 0xbabecafe
.word 0xabecafeb
.word 0xbecafeba
.word 0xecafebab
test_dataset_0:
NAN_BOXED(0,64,FLEN)
NAN_BOXED(9223372036854775808,64,FLEN)
NAN_BOXED(1,64,FLEN)
NAN_BOXED(9223372036854775809,64,FLEN)
NAN_BOXED(2,64,FLEN)
NAN_BOXED(9223372036854775810,64,FLEN)
NAN_BOXED(4503599627370495,64,FLEN)
NAN_BOXED(9227875636482146303,64,FLEN)
NAN_BOXED(4503599627370496,64,FLEN)
NAN_BOXED(9227875636482146304,64,FLEN)
NAN_BOXED(4503599627370498,64,FLEN)
NAN_BOXED(9227875636482146306,64,FLEN)
NAN_BOXED(9218868437227405311,64,FLEN)
NAN_BOXED(18442240474082181119,64,FLEN)
NAN_BOXED(9218868437227405312,64,FLEN)
NAN_BOXED(18442240474082181120,64,FLEN)
NAN_BOXED(9221120237041090560,64,FLEN)
NAN_BOXED(18444492273895866368,64,FLEN)
NAN_BOXED(9221120237041090561,64,FLEN)
NAN_BOXED(18444492273895866369,64,FLEN)
NAN_BOXED(9218868437227405313,64,FLEN)
NAN_BOXED(18442240474082181121,64,FLEN)
NAN_BOXED(4607182418800017408,64,FLEN)
NAN_BOXED(13799029258263199744,64,FLEN)
test_dataset_1:
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
NAN_BOXED(0,64,FLEN)
RVTEST_DATA_END

RVMODEL_DATA_BEGIN
rvtest_sig_begin:
sig_begin_canary:
CANARY;



signature_x1_0:
.fill 0*((SIGALIGN)/4),4,0xdeadbeef


signature_x1_1:
.fill 54*((SIGALIGN)/4),4,0xdeadbeef


signature_x5_0:
.fill 10*((SIGALIGN)/4),4,0xdeadbeef

#ifdef rvtest_mtrap_routine
tsig_begin_canary:
CANARY;

mtrap_sigptr:
.fill 64*XLEN/32,4,0xdeadbeef

tsig_end_canary:
CANARY;
#endif

#ifdef rvtest_gpr_save

gpr_save:
.fill 32*XLEN/32,4,0xdeadbeef

#endif


sig_end_canary:
CANARY;
rvtest_sig_end:
RVMODEL_DATA_END
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