diff --git a/src/gallium/drivers/r300/compiler/r500_fragprog.c b/src/gallium/drivers/r300/compiler/r500_fragprog.c
index 297c290be7d..e0b88e3be60 100644
--- a/src/gallium/drivers/r300/compiler/r500_fragprog.c
+++ b/src/gallium/drivers/r300/compiler/r500_fragprog.c
@@ -145,7 +145,9 @@ static void r500_transform_IF_instr(
 				break;
 			}
 			if (!preserve_opcode) {
-				writer->Inst->U.I.Opcode = RC_OPCODE_SUB;
+				writer->Inst->U.I.Opcode = RC_OPCODE_ADD;
+				writer->Inst->U.I.SrcReg[1].Negate =
+					~writer->Inst->U.I.SrcReg[1].Negate;
 			}
 			writer->Inst->U.I.DstReg.WriteMask = 0;
 			writer->Inst->U.I.DstReg.File = RC_FILE_NONE;
diff --git a/src/gallium/drivers/r300/compiler/radeon_opcodes.c b/src/gallium/drivers/r300/compiler/radeon_opcodes.c
index 853d7982f0d..6054474c3e5 100644
--- a/src/gallium/drivers/r300/compiler/radeon_opcodes.c
+++ b/src/gallium/drivers/r300/compiler/radeon_opcodes.c
@@ -261,13 +261,6 @@ const struct rc_opcode_info rc_opcodes[MAX_RC_OPCODE] = {
 		.HasDstReg = 1,
 		.IsComponentwise = 1
 	},
-	{
-		.Opcode = RC_OPCODE_SUB,
-		.Name = "SUB",
-		.NumSrcRegs = 2,
-		.HasDstReg = 1,
-		.IsComponentwise = 1
-	},
 	{
 		.Opcode = RC_OPCODE_TEX,
 		.Name = "TEX",
diff --git a/src/gallium/drivers/r300/compiler/radeon_opcodes.h b/src/gallium/drivers/r300/compiler/radeon_opcodes.h
index 573ce8db8b9..90b1aef2a73 100644
--- a/src/gallium/drivers/r300/compiler/radeon_opcodes.h
+++ b/src/gallium/drivers/r300/compiler/radeon_opcodes.h
@@ -140,9 +140,6 @@ typedef enum {
 	/** vec4 instruction: dst.c = (src0.c != src1.c) ? 1.0 : 0.0 */
 	RC_OPCODE_SNE,
 
-	/** vec4 instruction: dst.c = src0.c - src1.c */
-	RC_OPCODE_SUB,
-
 	RC_OPCODE_TEX,
 	RC_OPCODE_TXB,
 	RC_OPCODE_TXD,
diff --git a/src/gallium/drivers/r300/compiler/radeon_program_alu.c b/src/gallium/drivers/r300/compiler/radeon_program_alu.c
index 504e24bf06d..bc8b77214a8 100644
--- a/src/gallium/drivers/r300/compiler/radeon_program_alu.c
+++ b/src/gallium/drivers/r300/compiler/radeon_program_alu.c
@@ -213,13 +213,6 @@ static void transform_RSQ(struct radeon_compiler* c,
 	inst->U.I.SrcReg[0] = absolute(inst->U.I.SrcReg[0]);
 }
 
-static void transform_SUB(struct radeon_compiler* c,
-	struct rc_instruction* inst)
-{
-	inst->U.I.Opcode = RC_OPCODE_ADD;
-	inst->U.I.SrcReg[1] = negate(inst->U.I.SrcReg[1]);
-}
-
 static void transform_KILP(struct radeon_compiler * c,
 	struct rc_instruction * inst)
 {
@@ -231,11 +224,6 @@ static void transform_KILP(struct radeon_compiler * c,
  * Can be used as a transformation for @ref radeonClauseLocalTransform,
  * no userData necessary.
  *
- * Eliminates the following ALU instructions:
- *  SUB
- * using:
- *  ADD
- *
  * Transforms RSQ to Radeon's native RSQ by explicitly setting
  * absolute value.
  *
@@ -254,7 +242,6 @@ int radeonTransformALU(
 	case RC_OPCODE_SGE: unreachable();
 	case RC_OPCODE_SLT: unreachable();
 	case RC_OPCODE_SNE: unreachable();
-	case RC_OPCODE_SUB: transform_SUB(c, inst); return 1;
 	default:
 		return 0;
 	}
@@ -398,7 +385,6 @@ int r300_transform_vertex_alu(
 			return 1;
 		}
 		return 0;
-	case RC_OPCODE_SUB: transform_SUB(c, inst); return 1;
 	default:
 		return 0;
 	}