test/codegen: add riscv64 codegen for arithmetic tests

Codify the current riscv64 code generation for various subtract from
constant and addition/subtraction tests.

Change-Id: I54ad923280a0578a338bc4431fa5bdc0644c4729
Reviewed-on: https://go-review.googlesource.com/c/go/+/652316
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: David Chase <drchase@google.com>

diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go
index f09af769f5585c0e089d21e0ab287efa2d4b10a1..67bc88b5877362953f881933bf749c357e076241 100644 (file)
--- a/test/codegen/arithmetic.go
+++ b/test/codegen/arithmetic.go
@@ -85,36 +85,42 @@ func SubMem(arr []int, b, c, d int) int {
 
 func SubFromConst(a int) int {
        // ppc64x: `SUBC\tR[0-9]+,\s[$]40,\sR`
+       // riscv64: "ADDI\t\\$-40","NEG"
        b := 40 - a
        return b
 }
 
 func SubFromConstNeg(a int) int {
        // ppc64x: `ADD\t[$]40,\sR[0-9]+,\sR`
+       // riscv64: "NEG","ADDI\t\\$-40","NEG"
        c := 40 - (-a)
        return c
 }
 
 func SubSubFromConst(a int) int {
        // ppc64x: `ADD\t[$]20,\sR[0-9]+,\sR`
+       // riscv64: "ADDI\t\\$20",-"NEG"
        c := 40 - (20 - a)
        return c
 }
 
 func AddSubFromConst(a int) int {
        // ppc64x: `SUBC\tR[0-9]+,\s[$]60,\sR`
+       // riscv64: "ADDI\t\\$-60","NEG"
        c := 40 + (20 - a)
        return c
 }
 
 func NegSubFromConst(a int) int {
        // ppc64x: `ADD\t[$]-20,\sR[0-9]+,\sR`
+       // riscv64: "ADDI\t\\$-20"
        c := -(20 - a)
        return c
 }
 
 func NegAddFromConstNeg(a int) int {
        // ppc64x: `SUBC\tR[0-9]+,\s[$]40,\sR`
+       // riscv64: "ADDI\t\\$-40","NEG"
        c := -(-40 + a)
        return c
 }
@@ -122,6 +128,7 @@ func NegAddFromConstNeg(a int) int {
 func SubSubNegSimplify(a, b int) int {
        // amd64:"NEGQ"
        // ppc64x:"NEG"
+       // riscv64:"NEG",-"SUB"
        r := (a - b) - a
        return r
 }
@@ -129,6 +136,7 @@ func SubSubNegSimplify(a, b int) int {
 func SubAddSimplify(a, b int) int {
        // amd64:-"SUBQ",-"ADDQ"
        // ppc64x:-"SUB",-"ADD"
+       // riscv64:-"SUB",-"ADD"
        r := a + (b - a)
        return r
 }
@@ -152,6 +160,7 @@ func SubAddSimplify2(a, b, c int) (int, int, int, int, int, int) {
 func SubAddNegSimplify(a, b int) int {
        // amd64:"NEGQ",-"ADDQ",-"SUBQ"
        // ppc64x:"NEG",-"ADD",-"SUB"
+       // riscv64:"NEG",-"ADD",-"SUB"
        r := a - (b + a)
        return r
 }
@@ -159,6 +168,7 @@ func SubAddNegSimplify(a, b int) int {
 func AddAddSubSimplify(a, b, c int) int {
        // amd64:-"SUBQ"
        // ppc64x:-"SUB"
+       // riscv64:"ADD","ADD",-"SUB"
        r := a + (b + (c - a))
        return r
 }